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1.1 |
/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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*/ |
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package java.util.concurrent; |
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import java.util.function.Supplier; |
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1.7 |
import java.util.function.Block; |
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import java.util.function.BiBlock; |
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1.1 |
import java.util.function.Function; |
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import java.util.function.BiFunction; |
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import java.util.concurrent.Future; |
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import java.util.concurrent.TimeUnit; |
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import java.util.concurrent.ForkJoinPool; |
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import java.util.concurrent.ForkJoinTask; |
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import java.util.concurrent.Executor; |
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1.5 |
import java.util.concurrent.ThreadLocalRandom; |
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1.1 |
import java.util.concurrent.ExecutionException; |
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import java.util.concurrent.TimeoutException; |
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import java.util.concurrent.CancellationException; |
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dl |
1.19 |
import java.util.concurrent.CompletionException; |
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1.1 |
import java.util.concurrent.atomic.AtomicInteger; |
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import java.util.concurrent.locks.LockSupport; |
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/** |
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* A {@link Future} that may be explicitly completed (setting its |
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* value and status), and may include dependent functions and actions |
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* that trigger upon its completion. |
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* |
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1.7 |
* <p>Similar methods are available for Functions, Blocks, and |
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* Runnables, depending on whether actions require arguments and/or |
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* produce results. Functions and actions supplied for dependent |
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* completions (mainly using methods with prefix {@code then}) may be |
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dl |
1.1 |
* performed by the thread that completes the current |
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* CompletableFuture, or by any other caller of these methods. There |
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* are no guarantees about the order of processing completions unless |
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dl |
1.17 |
* constrained by these methods. |
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dl |
1.1 |
* |
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jsr166 |
1.4 |
* <p>When two or more threads attempt to {@link #complete} or {@link |
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dl |
1.17 |
* #completeExceptionally} a CompletableFuture, only one of them |
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1.19 |
* succeeds. |
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* |
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* <p> Upon exceptional completion, or when a completion entails |
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1.5 |
* computation of a function or action, and it terminates abruptly |
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1.19 |
* with an (unchecked) exception or error, then further completions |
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* act as {@code completeExceptionally} with a {@link |
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* CompletionException} holding that exception as its cause. If a |
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* CompletableFuture completes exceptionally, and is not followed by a |
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* {@link #exceptionally} or {@link #handle} completion, then all of |
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* its dependents (and their dependents) also complete exceptionally |
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* with CompletionExceptions holding the ultimate cause. For |
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* compatibility with {@link Future}, in case of a CompletionException, |
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* methods {@link #get()} and {@link #get(long, TimeUnit)} throw a |
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* {@link ExecutionException} with the same cause as would be held in |
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* the corresponding CompletionException. |
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1.1 |
* |
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* <p>CompletableFutures themselves do not execute asynchronously. |
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* However, the {@code async} methods provide commonly useful ways to |
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jsr166 |
1.8 |
* commence asynchronous processing, using either a given {@link |
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dl |
1.1 |
* Executor} or by default the {@link ForkJoinPool#commonPool()}, of a |
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* function or action that will result in the completion of a new |
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* CompletableFuture. |
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* |
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* @author Doug Lea |
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* @since 1.8 |
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*/ |
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public class CompletableFuture<T> implements Future<T> { |
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/* |
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* Quick overview (more to come): |
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* |
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* 1. Non-nullness of field result indicates done. An AltResult is |
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* used to box null as a result, as well as to hold exceptions. |
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* |
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* 2. Waiters are held in a Treiber stack similar to the one used |
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jsr166 |
1.9 |
* in FutureTask. |
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dl |
1.1 |
* |
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* 3. Completions are also kept in a list/stack, and pulled off |
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1.17 |
* and run when completion is triggered. Because post-processing |
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* may race with direct calls, completions extend AtomicInteger so |
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* callers can claim the action via compareAndSet(0, 1). |
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dl |
1.1 |
*/ |
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static final class AltResult { |
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final Throwable ex; // null only for NIL |
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jsr166 |
1.2 |
AltResult(Throwable ex) { this.ex = ex; } |
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dl |
1.1 |
} |
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static final AltResult NIL = new AltResult(null); |
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/** |
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* Simple linked list nodes to record waiting threads in a Treiber |
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* stack. See other classes such as Phaser and SynchronousQueue |
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* for more detailed explanation. |
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*/ |
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static final class WaitNode { |
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volatile Thread thread; |
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volatile WaitNode next; |
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} |
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/** |
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* Simple linked list nodes to record completions, used in |
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* basically the same way as WaitNodes |
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*/ |
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static final class CompletionNode { |
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jsr166 |
1.2 |
final Completion completion; |
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dl |
1.1 |
volatile CompletionNode next; |
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jsr166 |
1.2 |
CompletionNode(Completion completion) { this.completion = completion; } |
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dl |
1.1 |
} |
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volatile Object result; // either the result or boxed AltResult |
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volatile WaitNode waiters; // Treiber stack of threads blocked on get() |
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volatile CompletionNode completions; // list (Treiber stack) of completions |
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/** |
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* Creates a new incomplete CompletableFuture. |
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*/ |
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public CompletableFuture() { |
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} |
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/** |
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* Asynchronously executes in the {@link |
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* ForkJoinPool#commonPool()}, a task that completes the returned |
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* CompletableFuture with the result of the given Supplier. |
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* |
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* @param supplier a function returning the value to be used |
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jsr166 |
1.14 |
* to complete the returned CompletableFuture |
128 |
jsr166 |
1.11 |
* @return the CompletableFuture |
129 |
dl |
1.1 |
*/ |
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dl |
1.7 |
public static <U> CompletableFuture<U> supplyAsync(Supplier<U> supplier) { |
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dl |
1.1 |
if (supplier == null) throw new NullPointerException(); |
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CompletableFuture<U> f = new CompletableFuture<U>(); |
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ForkJoinPool.commonPool(). |
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dl |
1.7 |
execute((ForkJoinTask<?>)new AsyncSupplier<U>(supplier, f)); |
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dl |
1.1 |
return f; |
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} |
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/** |
139 |
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* Asynchronously executes using the given executor, a task that |
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* completes the returned CompletableFuture with the result of the |
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* given Supplier. |
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* |
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* @param supplier a function returning the value to be used |
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jsr166 |
1.11 |
* to complete the returned CompletableFuture |
145 |
dl |
1.1 |
* @param executor the executor to use for asynchronous execution |
146 |
jsr166 |
1.11 |
* @return the CompletableFuture |
147 |
dl |
1.1 |
*/ |
148 |
dl |
1.7 |
public static <U> CompletableFuture<U> supplyAsync(Supplier<U> supplier, |
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Executor executor) { |
150 |
dl |
1.1 |
if (executor == null || supplier == null) |
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throw new NullPointerException(); |
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CompletableFuture<U> f = new CompletableFuture<U>(); |
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dl |
1.7 |
executor.execute(new AsyncSupplier<U>(supplier, f)); |
154 |
dl |
1.1 |
return f; |
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} |
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/** |
158 |
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* Asynchronously executes in the {@link |
159 |
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* ForkJoinPool#commonPool()} a task that runs the given action, |
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jsr166 |
1.11 |
* and then completes the returned CompletableFuture. |
161 |
dl |
1.1 |
* |
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* @param runnable the action to run before completing the |
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jsr166 |
1.11 |
* returned CompletableFuture |
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* @return the CompletableFuture |
165 |
dl |
1.1 |
*/ |
166 |
dl |
1.7 |
public static CompletableFuture<Void> runAsync(Runnable runnable) { |
167 |
dl |
1.1 |
if (runnable == null) throw new NullPointerException(); |
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CompletableFuture<Void> f = new CompletableFuture<Void>(); |
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ForkJoinPool.commonPool(). |
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execute((ForkJoinTask<?>)new AsyncRunnable(runnable, f)); |
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return f; |
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} |
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/** |
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* Asynchronously executes using the given executor, a task that |
176 |
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* runs the given action, and then completes the returned |
177 |
jsr166 |
1.11 |
* CompletableFuture. |
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dl |
1.1 |
* |
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* @param runnable the action to run before completing the |
180 |
jsr166 |
1.11 |
* returned CompletableFuture |
181 |
dl |
1.1 |
* @param executor the executor to use for asynchronous execution |
182 |
jsr166 |
1.11 |
* @return the CompletableFuture |
183 |
dl |
1.1 |
*/ |
184 |
dl |
1.7 |
public static CompletableFuture<Void> runAsync(Runnable runnable, |
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jsr166 |
1.12 |
Executor executor) { |
186 |
dl |
1.1 |
if (executor == null || runnable == null) |
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throw new NullPointerException(); |
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CompletableFuture<Void> f = new CompletableFuture<Void>(); |
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executor.execute(new AsyncRunnable(runnable, f)); |
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return f; |
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} |
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/** |
194 |
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* Returns {@code true} if completed in any fashion: normally, |
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jsr166 |
1.16 |
* exceptionally, or via cancellation. |
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dl |
1.1 |
* |
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* @return {@code true} if completed |
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*/ |
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public boolean isDone() { |
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return result != null; |
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} |
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/** |
204 |
dl |
1.19 |
* Waits if necessary for the computation to complete, and then |
205 |
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* retrieves its result. |
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* |
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* @return the computed result |
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* @throws CancellationException if the computation was cancelled |
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* @throws ExecutionException if the computation threw an |
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* exception |
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* @throws InterruptedException if the current thread was interrupted |
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* while waiting |
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*/ |
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public T get() throws InterruptedException, ExecutionException { |
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Object r; Throwable ex; |
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if ((r = result) == null && (r = waitingGet(true)) == null) |
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throw new InterruptedException(); |
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if (r instanceof AltResult) { |
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if ((ex = ((AltResult)r).ex) != null) { |
220 |
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if (ex instanceof CancellationException) |
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throw (CancellationException)ex; |
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if (ex instanceof CompletionException) { |
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Throwable cause = ex.getCause(); |
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if (cause != null) |
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ex = cause; |
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} |
227 |
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throw new ExecutionException(ex); |
228 |
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} |
229 |
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return null; |
230 |
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} |
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return (T)r; |
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} |
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/** |
235 |
dl |
1.1 |
* Returns the result value when complete, or throws an |
236 |
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* (unchecked) exception if completed exceptionally. To better |
237 |
dl |
1.19 |
* conform with the use of common functional forms, if a |
238 |
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* computation involved in the completion of this |
239 |
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* CompletableFuture threw an exception, this method throws an |
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* (unchecked) {@link CompletionException} with the |
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* underlying exception as its cause. Additionally, this method |
242 |
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* does not abort on interrupt. |
243 |
dl |
1.1 |
* |
244 |
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* @return the result value |
245 |
dl |
1.19 |
* @throws CancellationException if the computation was cancelled |
246 |
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* @throws CompletionException if the computation threw an |
247 |
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* exception |
248 |
dl |
1.1 |
*/ |
249 |
dl |
1.19 |
public T getValue() { |
250 |
dl |
1.1 |
Object r; Throwable ex; |
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jsr166 |
1.2 |
if ((r = result) == null) |
252 |
dl |
1.19 |
r = waitingGet(false); |
253 |
jsr166 |
1.2 |
if (r instanceof AltResult) { |
254 |
dl |
1.5 |
if ((ex = ((AltResult)r).ex) != null) { |
255 |
dl |
1.19 |
if (ex instanceof CancellationException) |
256 |
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throw (CancellationException)ex; |
257 |
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if (ex instanceof CompletionException) |
258 |
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throw (CompletionException)ex; |
259 |
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throw new CompletionException(ex); |
260 |
dl |
1.5 |
} |
261 |
jsr166 |
1.2 |
return null; |
262 |
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} |
263 |
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return (T)r; |
264 |
dl |
1.1 |
} |
265 |
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266 |
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/** |
267 |
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* Returns the result value (or throws any encountered exception) |
268 |
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* if completed, else returns the given valueIfAbsent. |
269 |
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* |
270 |
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* @param valueIfAbsent the value to return if not completed |
271 |
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* @return the result value, if completed, else the given valueIfAbsent |
272 |
dl |
1.19 |
* @throws CancellationException if the computation was cancelled |
273 |
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* @throws CompletionException if the computation threw an |
274 |
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* exception |
275 |
dl |
1.1 |
*/ |
276 |
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public T getNow(T valueIfAbsent) { |
277 |
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Object r; Throwable ex; |
278 |
jsr166 |
1.2 |
if ((r = result) == null) |
279 |
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return valueIfAbsent; |
280 |
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if (r instanceof AltResult) { |
281 |
dl |
1.5 |
if ((ex = ((AltResult)r).ex) != null) { |
282 |
dl |
1.19 |
if (ex instanceof CancellationException) |
283 |
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throw (CancellationException)ex; |
284 |
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if (ex instanceof CompletionException) |
285 |
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throw (CompletionException)ex; |
286 |
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throw new CompletionException(ex); |
287 |
dl |
1.5 |
} |
288 |
jsr166 |
1.2 |
return null; |
289 |
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} |
290 |
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return (T)r; |
291 |
dl |
1.1 |
} |
292 |
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293 |
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/** |
294 |
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* Waits if necessary for at most the given time for completion, |
295 |
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* and then retrieves its result, if available. |
296 |
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* |
297 |
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* @param timeout the maximum time to wait |
298 |
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* @param unit the time unit of the timeout argument |
299 |
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* @return the computed result |
300 |
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* @throws CancellationException if the computation was cancelled |
301 |
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* @throws ExecutionException if the computation threw an |
302 |
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* exception |
303 |
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* @throws InterruptedException if the current thread was interrupted |
304 |
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* while waiting |
305 |
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* @throws TimeoutException if the wait timed out |
306 |
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*/ |
307 |
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public T get(long timeout, TimeUnit unit) |
308 |
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throws InterruptedException, ExecutionException, TimeoutException { |
309 |
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Object r; Throwable ex; |
310 |
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long nanos = unit.toNanos(timeout); |
311 |
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if (Thread.interrupted()) |
312 |
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throw new InterruptedException(); |
313 |
jsr166 |
1.2 |
if ((r = result) == null) |
314 |
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r = timedAwaitDone(nanos); |
315 |
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if (r instanceof AltResult) { |
316 |
dl |
1.5 |
if ((ex = ((AltResult)r).ex) != null) { |
317 |
dl |
1.19 |
if (ex instanceof CancellationException) |
318 |
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throw (CancellationException)ex; |
319 |
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if (ex instanceof CompletionException) { |
320 |
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Throwable cause = ex.getCause(); |
321 |
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if (cause != null) |
322 |
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ex = cause; |
323 |
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} |
324 |
dl |
1.1 |
throw new ExecutionException(ex); |
325 |
dl |
1.5 |
} |
326 |
jsr166 |
1.2 |
return null; |
327 |
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} |
328 |
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return (T)r; |
329 |
dl |
1.1 |
} |
330 |
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|
331 |
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/** |
332 |
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* If not already completed, sets the value returned by {@link |
333 |
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* #get()} and related methods to the given value. |
334 |
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* |
335 |
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* @param value the result value |
336 |
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* @return true if this invocation caused this CompletableFuture |
337 |
jsr166 |
1.14 |
* to transition to a completed state, else false |
338 |
dl |
1.1 |
*/ |
339 |
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public boolean complete(T value) { |
340 |
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if (result == null && |
341 |
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UNSAFE.compareAndSwapObject(this, RESULT, null, |
342 |
jsr166 |
1.2 |
(value == null) ? NIL : value)) { |
343 |
dl |
1.1 |
postComplete(); |
344 |
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return true; |
345 |
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} |
346 |
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return false; |
347 |
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} |
348 |
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349 |
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/** |
350 |
dl |
1.19 |
* Internal version of complete; CASes in an existing result or |
351 |
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* AltResult. |
352 |
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*/ |
353 |
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private void propagateCompletion(Object r) { |
354 |
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if (UNSAFE.compareAndSwapObject(this, RESULT, null, r)) |
355 |
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postComplete(); |
356 |
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} |
357 |
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358 |
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/** |
359 |
dl |
1.1 |
* If not already completed, causes invocations of {@link #get()} |
360 |
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* and related methods to throw the given exception. |
361 |
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* |
362 |
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* @param ex the exception |
363 |
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* @return true if this invocation caused this CompletableFuture |
364 |
jsr166 |
1.14 |
* to transition to a completed state, else false |
365 |
dl |
1.1 |
*/ |
366 |
|
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public boolean completeExceptionally(Throwable ex) { |
367 |
|
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if (ex == null) throw new NullPointerException(); |
368 |
|
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if (result == null) { |
369 |
dl |
1.19 |
AltResult r = new AltResult(ex); |
370 |
dl |
1.1 |
if (UNSAFE.compareAndSwapObject(this, RESULT, null, r)) { |
371 |
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|
postComplete(); |
372 |
|
|
return true; |
373 |
|
|
} |
374 |
|
|
} |
375 |
|
|
return false; |
376 |
|
|
} |
377 |
|
|
|
378 |
|
|
/** |
379 |
dl |
1.19 |
* Internal version of completeExceptionally that avoids creating |
380 |
|
|
* chains of CompletionExceptions |
381 |
|
|
*/ |
382 |
|
|
private void propagateException(Throwable ex) { |
383 |
|
|
if (result == null) { |
384 |
|
|
AltResult r = new AltResult |
385 |
|
|
((ex instanceof CompletionException) ? ex : |
386 |
|
|
new CompletionException(ex)); |
387 |
|
|
if (UNSAFE.compareAndSwapObject(this, RESULT, null, r)) |
388 |
|
|
postComplete(); |
389 |
|
|
} |
390 |
|
|
} |
391 |
|
|
|
392 |
|
|
/** |
393 |
dl |
1.1 |
* Creates and returns a CompletableFuture that is completed with |
394 |
|
|
* the result of the given function of this CompletableFuture. |
395 |
|
|
* If this CompletableFuture completes exceptionally, |
396 |
|
|
* then the returned CompletableFuture also does so, |
397 |
dl |
1.19 |
* with a CompletionException holding this exception as |
398 |
dl |
1.1 |
* its cause. |
399 |
|
|
* |
400 |
|
|
* @param fn the function to use to compute the value of |
401 |
|
|
* the returned CompletableFuture |
402 |
|
|
* @return the new CompletableFuture |
403 |
|
|
*/ |
404 |
dl |
1.7 |
public <U> CompletableFuture<U> thenApply(Function<? super T,? extends U> fn) { |
405 |
dl |
1.1 |
return thenFunction(fn, null); |
406 |
|
|
} |
407 |
|
|
|
408 |
|
|
/** |
409 |
|
|
* Creates and returns a CompletableFuture that is asynchronously |
410 |
|
|
* completed using the {@link ForkJoinPool#commonPool()} with the |
411 |
|
|
* result of the given function of this CompletableFuture. If |
412 |
|
|
* this CompletableFuture completes exceptionally, then the |
413 |
|
|
* returned CompletableFuture also does so, with a |
414 |
dl |
1.19 |
* CompletionException holding this exception as its cause. |
415 |
dl |
1.1 |
* |
416 |
|
|
* @param fn the function to use to compute the value of |
417 |
|
|
* the returned CompletableFuture |
418 |
|
|
* @return the new CompletableFuture |
419 |
|
|
*/ |
420 |
dl |
1.7 |
public <U> CompletableFuture<U> thenApplyAsync(Function<? super T,? extends U> fn) { |
421 |
dl |
1.1 |
return thenFunction(fn, ForkJoinPool.commonPool()); |
422 |
|
|
} |
423 |
|
|
|
424 |
|
|
/** |
425 |
|
|
* Creates and returns a CompletableFuture that is asynchronously |
426 |
|
|
* completed using the given executor with the result of the given |
427 |
|
|
* function of this CompletableFuture. If this CompletableFuture |
428 |
|
|
* completes exceptionally, then the returned CompletableFuture |
429 |
dl |
1.19 |
* also does so, with a CompletionException holding this exception as |
430 |
dl |
1.1 |
* its cause. |
431 |
|
|
* |
432 |
|
|
* @param fn the function to use to compute the value of |
433 |
|
|
* the returned CompletableFuture |
434 |
|
|
* @param executor the executor to use for asynchronous execution |
435 |
|
|
* @return the new CompletableFuture |
436 |
|
|
*/ |
437 |
dl |
1.7 |
public <U> CompletableFuture<U> thenApplyAsync(Function<? super T,? extends U> fn, |
438 |
jsr166 |
1.12 |
Executor executor) { |
439 |
dl |
1.1 |
if (executor == null) throw new NullPointerException(); |
440 |
|
|
return thenFunction(fn, executor); |
441 |
|
|
} |
442 |
|
|
|
443 |
|
|
/** |
444 |
|
|
* Creates and returns a CompletableFuture that is completed after |
445 |
dl |
1.7 |
* performing the given action with this CompletableFuture's |
446 |
|
|
* result when it completes. If this CompletableFuture |
447 |
|
|
* completes exceptionally, then the returned CompletableFuture |
448 |
dl |
1.19 |
* also does so, with a CompletionException holding this exception as |
449 |
dl |
1.7 |
* its cause. |
450 |
|
|
* |
451 |
|
|
* @param block the action to perform before completing the |
452 |
|
|
* returned CompletableFuture |
453 |
|
|
* @return the new CompletableFuture |
454 |
|
|
*/ |
455 |
|
|
public CompletableFuture<Void> thenAccept(Block<? super T> block) { |
456 |
|
|
return thenBlock(block, null); |
457 |
|
|
} |
458 |
|
|
|
459 |
|
|
/** |
460 |
|
|
* Creates and returns a CompletableFuture that is asynchronously |
461 |
|
|
* completed using the {@link ForkJoinPool#commonPool()} with this |
462 |
|
|
* CompletableFuture's result when it completes. If this |
463 |
|
|
* CompletableFuture completes exceptionally, then the returned |
464 |
dl |
1.19 |
* CompletableFuture also does so, with a CompletionException holding |
465 |
dl |
1.7 |
* this exception as its cause. |
466 |
|
|
* |
467 |
|
|
* @param block the action to perform before completing the |
468 |
|
|
* returned CompletableFuture |
469 |
|
|
* @return the new CompletableFuture |
470 |
|
|
*/ |
471 |
|
|
public CompletableFuture<Void> thenAcceptAsync(Block<? super T> block) { |
472 |
|
|
return thenBlock(block, ForkJoinPool.commonPool()); |
473 |
|
|
} |
474 |
|
|
|
475 |
|
|
/** |
476 |
|
|
* Creates and returns a CompletableFuture that is asynchronously |
477 |
|
|
* completed using the given executor with this |
478 |
|
|
* CompletableFuture's result when it completes. If this |
479 |
|
|
* CompletableFuture completes exceptionally, then the returned |
480 |
dl |
1.19 |
* CompletableFuture also does so, with a CompletionException holding |
481 |
dl |
1.7 |
* this exception as its cause. |
482 |
|
|
* |
483 |
|
|
* @param block the action to perform before completing the |
484 |
|
|
* returned CompletableFuture |
485 |
|
|
* @param executor the executor to use for asynchronous execution |
486 |
|
|
* @return the new CompletableFuture |
487 |
|
|
*/ |
488 |
|
|
public CompletableFuture<Void> thenAcceptAsync(Block<? super T> block, |
489 |
|
|
Executor executor) { |
490 |
|
|
if (executor == null) throw new NullPointerException(); |
491 |
|
|
return thenBlock(block, executor); |
492 |
|
|
} |
493 |
|
|
|
494 |
|
|
/** |
495 |
|
|
* Creates and returns a CompletableFuture that is completed after |
496 |
|
|
* performing the given action when this CompletableFuture |
497 |
dl |
1.1 |
* completes. If this CompletableFuture completes exceptionally, |
498 |
|
|
* then the returned CompletableFuture also does so, with a |
499 |
dl |
1.19 |
* CompletionException holding this exception as its cause. |
500 |
dl |
1.1 |
* |
501 |
|
|
* @param action the action to perform before completing the |
502 |
|
|
* returned CompletableFuture |
503 |
|
|
* @return the new CompletableFuture |
504 |
|
|
*/ |
505 |
dl |
1.7 |
public CompletableFuture<Void> thenRun(Runnable action) { |
506 |
dl |
1.1 |
return thenRunnable(action, null); |
507 |
|
|
} |
508 |
|
|
|
509 |
|
|
/** |
510 |
|
|
* Creates and returns a CompletableFuture that is asynchronously |
511 |
|
|
* completed using the {@link ForkJoinPool#commonPool()} after |
512 |
dl |
1.7 |
* performing the given action when this CompletableFuture |
513 |
dl |
1.1 |
* completes. If this CompletableFuture completes exceptionally, |
514 |
|
|
* then the returned CompletableFuture also does so, with a |
515 |
dl |
1.19 |
* CompletionException holding this exception as its cause. |
516 |
dl |
1.1 |
* |
517 |
|
|
* @param action the action to perform before completing the |
518 |
|
|
* returned CompletableFuture |
519 |
|
|
* @return the new CompletableFuture |
520 |
|
|
*/ |
521 |
dl |
1.7 |
public CompletableFuture<Void> thenRunAsync(Runnable action) { |
522 |
dl |
1.1 |
return thenRunnable(action, ForkJoinPool.commonPool()); |
523 |
|
|
} |
524 |
|
|
|
525 |
|
|
/** |
526 |
|
|
* Creates and returns a CompletableFuture that is asynchronously |
527 |
|
|
* completed using the given executor after performing the given |
528 |
dl |
1.7 |
* action when this CompletableFuture completes. If this |
529 |
dl |
1.1 |
* CompletableFuture completes exceptionally, then the returned |
530 |
dl |
1.19 |
* CompletableFuture also does so, with a CompletionException holding |
531 |
dl |
1.1 |
* this exception as its cause. |
532 |
|
|
* |
533 |
|
|
* @param action the action to perform before completing the |
534 |
|
|
* returned CompletableFuture |
535 |
|
|
* @param executor the executor to use for asynchronous execution |
536 |
|
|
* @return the new CompletableFuture |
537 |
|
|
*/ |
538 |
jsr166 |
1.12 |
public CompletableFuture<Void> thenRunAsync(Runnable action, |
539 |
|
|
Executor executor) { |
540 |
dl |
1.1 |
if (executor == null) throw new NullPointerException(); |
541 |
|
|
return thenRunnable(action, executor); |
542 |
|
|
} |
543 |
|
|
|
544 |
|
|
/** |
545 |
|
|
* Creates and returns a CompletableFuture that is completed with |
546 |
|
|
* the result of the given function of this and the other given |
547 |
dl |
1.7 |
* CompletableFuture's results when both complete. If this or |
548 |
dl |
1.1 |
* the other CompletableFuture complete exceptionally, then the |
549 |
|
|
* returned CompletableFuture also does so, with a |
550 |
dl |
1.19 |
* CompletionException holding the exception as its cause. |
551 |
dl |
1.1 |
* |
552 |
|
|
* @param other the other CompletableFuture |
553 |
|
|
* @param fn the function to use to compute the value of |
554 |
|
|
* the returned CompletableFuture |
555 |
|
|
* @return the new CompletableFuture |
556 |
|
|
*/ |
557 |
dl |
1.17 |
public <U,V> CompletableFuture<V> thenCombine(CompletableFuture<? extends U> other, |
558 |
|
|
BiFunction<? super T,? super U,? extends V> fn) { |
559 |
dl |
1.1 |
return andFunction(other, fn, null); |
560 |
|
|
} |
561 |
|
|
|
562 |
|
|
/** |
563 |
jsr166 |
1.3 |
* Creates and returns a CompletableFuture that is asynchronously |
564 |
dl |
1.1 |
* completed using the {@link ForkJoinPool#commonPool()} with |
565 |
|
|
* the result of the given function of this and the other given |
566 |
dl |
1.7 |
* CompletableFuture's results when both complete. If this or |
567 |
dl |
1.1 |
* the other CompletableFuture complete exceptionally, then the |
568 |
|
|
* returned CompletableFuture also does so, with a |
569 |
dl |
1.19 |
* CompletionException holding the exception as its cause. |
570 |
dl |
1.1 |
* |
571 |
|
|
* @param other the other CompletableFuture |
572 |
|
|
* @param fn the function to use to compute the value of |
573 |
|
|
* the returned CompletableFuture |
574 |
|
|
* @return the new CompletableFuture |
575 |
|
|
*/ |
576 |
dl |
1.17 |
public <U,V> CompletableFuture<V> thenCombineAsync(CompletableFuture<? extends U> other, |
577 |
|
|
BiFunction<? super T,? super U,? extends V> fn) { |
578 |
dl |
1.1 |
return andFunction(other, fn, ForkJoinPool.commonPool()); |
579 |
|
|
} |
580 |
|
|
|
581 |
|
|
/** |
582 |
jsr166 |
1.3 |
* Creates and returns a CompletableFuture that is |
583 |
dl |
1.1 |
* asynchronously completed using the given executor with the |
584 |
|
|
* result of the given function of this and the other given |
585 |
dl |
1.7 |
* CompletableFuture's results when both complete. If this or |
586 |
dl |
1.1 |
* the other CompletableFuture complete exceptionally, then the |
587 |
|
|
* returned CompletableFuture also does so, with a |
588 |
dl |
1.19 |
* CompletionException holding the exception as its cause. |
589 |
dl |
1.1 |
* |
590 |
|
|
* @param other the other CompletableFuture |
591 |
|
|
* @param fn the function to use to compute the value of |
592 |
|
|
* the returned CompletableFuture |
593 |
|
|
* @param executor the executor to use for asynchronous execution |
594 |
|
|
* @return the new CompletableFuture |
595 |
|
|
*/ |
596 |
|
|
|
597 |
dl |
1.17 |
public <U,V> CompletableFuture<V> thenCombineAsync(CompletableFuture<? extends U> other, |
598 |
|
|
BiFunction<? super T,? super U,? extends V> fn, |
599 |
|
|
Executor executor) { |
600 |
dl |
1.7 |
if (executor == null) throw new NullPointerException(); |
601 |
|
|
return andFunction(other, fn, executor); |
602 |
|
|
} |
603 |
|
|
|
604 |
|
|
/** |
605 |
|
|
* Creates and returns a CompletableFuture that is completed with |
606 |
|
|
* the results of this and the other given CompletableFuture if |
607 |
|
|
* both complete. If this and/or the other CompletableFuture |
608 |
|
|
* complete exceptionally, then the returned CompletableFuture |
609 |
dl |
1.19 |
* also does so, with a CompletionException holding one of these |
610 |
dl |
1.7 |
* exceptions as its cause. |
611 |
|
|
* |
612 |
|
|
* @param other the other CompletableFuture |
613 |
|
|
* @param block the action to perform before completing the |
614 |
|
|
* returned CompletableFuture |
615 |
|
|
* @return the new CompletableFuture |
616 |
|
|
*/ |
617 |
dl |
1.17 |
public <U> CompletableFuture<Void> thenAcceptBoth(CompletableFuture<? extends U> other, |
618 |
|
|
BiBlock<? super T, ? super U> block) { |
619 |
dl |
1.7 |
return andBlock(other, block, null); |
620 |
|
|
} |
621 |
|
|
|
622 |
|
|
/** |
623 |
|
|
* Creates and returns a CompletableFuture that is completed |
624 |
|
|
* asynchronously using the {@link ForkJoinPool#commonPool()} with |
625 |
|
|
* the results of this and the other given CompletableFuture when |
626 |
|
|
* both complete. If this and/or the other CompletableFuture |
627 |
|
|
* complete exceptionally, then the returned CompletableFuture |
628 |
dl |
1.19 |
* also does so, with a CompletionException holding one of these |
629 |
dl |
1.7 |
* exceptions as its cause. |
630 |
|
|
* |
631 |
|
|
* @param other the other CompletableFuture |
632 |
|
|
* @param block the action to perform before completing the |
633 |
|
|
* returned CompletableFuture |
634 |
|
|
* @return the new CompletableFuture |
635 |
|
|
*/ |
636 |
dl |
1.17 |
public <U> CompletableFuture<Void> thenAcceptBothAsync(CompletableFuture<? extends U> other, |
637 |
|
|
BiBlock<? super T, ? super U> block) { |
638 |
dl |
1.7 |
return andBlock(other, block, ForkJoinPool.commonPool()); |
639 |
|
|
} |
640 |
|
|
|
641 |
|
|
/** |
642 |
|
|
* Creates and returns a CompletableFuture that is completed |
643 |
|
|
* asynchronously using the given executor with the results of |
644 |
|
|
* this and the other given CompletableFuture when both complete. |
645 |
|
|
* If this and/or the other CompletableFuture complete |
646 |
|
|
* exceptionally, then the returned CompletableFuture also does |
647 |
dl |
1.19 |
* so, with a CompletionException holding one of these exceptions as |
648 |
dl |
1.7 |
* its cause. |
649 |
|
|
* |
650 |
|
|
* @param other the other CompletableFuture |
651 |
|
|
* @param block the action to perform before completing the |
652 |
|
|
* returned CompletableFuture |
653 |
|
|
* @param executor the executor to use for asynchronous execution |
654 |
|
|
* @return the new CompletableFuture |
655 |
|
|
*/ |
656 |
dl |
1.17 |
public <U> CompletableFuture<Void> thenAcceptBothAsync(CompletableFuture<? extends U> other, |
657 |
|
|
BiBlock<? super T, ? super U> block, |
658 |
|
|
Executor executor) { |
659 |
dl |
1.1 |
if (executor == null) throw new NullPointerException(); |
660 |
dl |
1.7 |
return andBlock(other, block, executor); |
661 |
dl |
1.1 |
} |
662 |
|
|
|
663 |
|
|
/** |
664 |
|
|
* Creates and returns a CompletableFuture that is completed |
665 |
dl |
1.7 |
* when this and the other given CompletableFuture both |
666 |
dl |
1.1 |
* complete. If this and/or the other CompletableFuture complete |
667 |
|
|
* exceptionally, then the returned CompletableFuture also does |
668 |
dl |
1.19 |
* so, with a CompletionException holding one of these exceptions as |
669 |
dl |
1.1 |
* its cause. |
670 |
|
|
* |
671 |
|
|
* @param other the other CompletableFuture |
672 |
|
|
* @param action the action to perform before completing the |
673 |
|
|
* returned CompletableFuture |
674 |
|
|
* @return the new CompletableFuture |
675 |
|
|
*/ |
676 |
dl |
1.17 |
public CompletableFuture<Void> runAfterBoth(CompletableFuture<?> other, |
677 |
|
|
Runnable action) { |
678 |
dl |
1.1 |
return andRunnable(other, action, null); |
679 |
|
|
} |
680 |
|
|
|
681 |
|
|
/** |
682 |
|
|
* Creates and returns a CompletableFuture that is completed |
683 |
|
|
* asynchronously using the {@link ForkJoinPool#commonPool()} |
684 |
dl |
1.7 |
* when this and the other given CompletableFuture both |
685 |
dl |
1.1 |
* complete. If this and/or the other CompletableFuture complete |
686 |
|
|
* exceptionally, then the returned CompletableFuture also does |
687 |
dl |
1.19 |
* so, with a CompletionException holding one of these exceptions as |
688 |
dl |
1.1 |
* its cause. |
689 |
|
|
* |
690 |
|
|
* @param other the other CompletableFuture |
691 |
|
|
* @param action the action to perform before completing the |
692 |
|
|
* returned CompletableFuture |
693 |
|
|
* @return the new CompletableFuture |
694 |
|
|
*/ |
695 |
dl |
1.17 |
public CompletableFuture<Void> runAfterBothAsync(CompletableFuture<?> other, |
696 |
|
|
Runnable action) { |
697 |
dl |
1.1 |
return andRunnable(other, action, ForkJoinPool.commonPool()); |
698 |
|
|
} |
699 |
|
|
|
700 |
|
|
/** |
701 |
|
|
* Creates and returns a CompletableFuture that is completed |
702 |
|
|
* asynchronously using the given executor |
703 |
dl |
1.7 |
* when this and the other given CompletableFuture both |
704 |
dl |
1.1 |
* complete. If this and/or the other CompletableFuture complete |
705 |
|
|
* exceptionally, then the returned CompletableFuture also does |
706 |
dl |
1.19 |
* so, with a CompletionException holding one of these exceptions as |
707 |
dl |
1.1 |
* its cause. |
708 |
|
|
* |
709 |
|
|
* @param other the other CompletableFuture |
710 |
|
|
* @param action the action to perform before completing the |
711 |
|
|
* returned CompletableFuture |
712 |
|
|
* @param executor the executor to use for asynchronous execution |
713 |
|
|
* @return the new CompletableFuture |
714 |
|
|
*/ |
715 |
dl |
1.17 |
public CompletableFuture<Void> runAfterBothAsync(CompletableFuture<?> other, |
716 |
|
|
Runnable action, |
717 |
|
|
Executor executor) { |
718 |
dl |
1.1 |
if (executor == null) throw new NullPointerException(); |
719 |
|
|
return andRunnable(other, action, executor); |
720 |
|
|
} |
721 |
|
|
|
722 |
|
|
/** |
723 |
|
|
* Creates and returns a CompletableFuture that is completed with |
724 |
|
|
* the result of the given function of either this or the other |
725 |
dl |
1.7 |
* given CompletableFuture's results when either complete. If |
726 |
dl |
1.1 |
* this and/or the other CompletableFuture complete exceptionally, |
727 |
|
|
* then the returned CompletableFuture may also do so, with a |
728 |
dl |
1.19 |
* CompletionException holding one of these exceptions as its cause. |
729 |
dl |
1.1 |
* No guarantees are made about which result or exception is used |
730 |
|
|
* in the returned CompletableFuture. |
731 |
|
|
* |
732 |
|
|
* @param other the other CompletableFuture |
733 |
|
|
* @param fn the function to use to compute the value of |
734 |
|
|
* the returned CompletableFuture |
735 |
|
|
* @return the new CompletableFuture |
736 |
|
|
*/ |
737 |
dl |
1.17 |
public <U> CompletableFuture<U> applyToEither(CompletableFuture<? extends T> other, |
738 |
|
|
Function<? super T, U> fn) { |
739 |
dl |
1.1 |
return orFunction(other, fn, null); |
740 |
|
|
} |
741 |
|
|
|
742 |
|
|
/** |
743 |
|
|
* Creates and returns a CompletableFuture that is completed |
744 |
|
|
* asynchronously using the {@link ForkJoinPool#commonPool()} with |
745 |
|
|
* the result of the given function of either this or the other |
746 |
dl |
1.7 |
* given CompletableFuture's results when either complete. If |
747 |
dl |
1.1 |
* this and/or the other CompletableFuture complete exceptionally, |
748 |
|
|
* then the returned CompletableFuture may also do so, with a |
749 |
dl |
1.19 |
* CompletionException holding one of these exceptions as its cause. |
750 |
dl |
1.1 |
* No guarantees are made about which result or exception is used |
751 |
|
|
* in the returned CompletableFuture. |
752 |
|
|
* |
753 |
|
|
* @param other the other CompletableFuture |
754 |
|
|
* @param fn the function to use to compute the value of |
755 |
|
|
* the returned CompletableFuture |
756 |
|
|
* @return the new CompletableFuture |
757 |
|
|
*/ |
758 |
dl |
1.17 |
public <U> CompletableFuture<U> applyToEitherAsync(CompletableFuture<? extends T> other, |
759 |
|
|
Function<? super T, U> fn) { |
760 |
dl |
1.1 |
return orFunction(other, fn, ForkJoinPool.commonPool()); |
761 |
|
|
} |
762 |
|
|
|
763 |
|
|
/** |
764 |
|
|
* Creates and returns a CompletableFuture that is completed |
765 |
|
|
* asynchronously using the given executor with the result of the |
766 |
|
|
* given function of either this or the other given |
767 |
dl |
1.7 |
* CompletableFuture's results when either complete. If this |
768 |
dl |
1.1 |
* and/or the other CompletableFuture complete exceptionally, then |
769 |
|
|
* the returned CompletableFuture may also do so, with a |
770 |
dl |
1.19 |
* CompletionException holding one of these exceptions as its cause. |
771 |
dl |
1.1 |
* No guarantees are made about which result or exception is used |
772 |
|
|
* in the returned CompletableFuture. |
773 |
|
|
* |
774 |
|
|
* @param other the other CompletableFuture |
775 |
|
|
* @param fn the function to use to compute the value of |
776 |
|
|
* the returned CompletableFuture |
777 |
|
|
* @param executor the executor to use for asynchronous execution |
778 |
|
|
* @return the new CompletableFuture |
779 |
|
|
*/ |
780 |
dl |
1.17 |
public <U> CompletableFuture<U> applyToEitherAsync(CompletableFuture<? extends T> other, |
781 |
|
|
Function<? super T, U> fn, |
782 |
|
|
Executor executor) { |
783 |
dl |
1.1 |
if (executor == null) throw new NullPointerException(); |
784 |
|
|
return orFunction(other, fn, executor); |
785 |
|
|
} |
786 |
|
|
|
787 |
|
|
/** |
788 |
dl |
1.7 |
* Creates and returns a CompletableFuture that is completed after |
789 |
|
|
* performing the given action with the result of either this or the |
790 |
|
|
* other given CompletableFuture's result, when either complete. |
791 |
|
|
* If this and/or the other CompletableFuture complete |
792 |
|
|
* exceptionally, then the returned CompletableFuture may also do |
793 |
dl |
1.19 |
* so, with a CompletionException holding one of these exceptions as |
794 |
dl |
1.7 |
* its cause. No guarantees are made about which exception is |
795 |
|
|
* used in the returned CompletableFuture. |
796 |
|
|
* |
797 |
|
|
* @param other the other CompletableFuture |
798 |
|
|
* @param block the action to perform before completing the |
799 |
|
|
* returned CompletableFuture |
800 |
|
|
* @return the new CompletableFuture |
801 |
|
|
*/ |
802 |
dl |
1.17 |
public CompletableFuture<Void> acceptEither(CompletableFuture<? extends T> other, |
803 |
|
|
Block<? super T> block) { |
804 |
dl |
1.7 |
return orBlock(other, block, null); |
805 |
|
|
} |
806 |
|
|
|
807 |
|
|
/** |
808 |
|
|
* Creates and returns a CompletableFuture that is completed |
809 |
|
|
* asynchronously using the {@link ForkJoinPool#commonPool()}, |
810 |
|
|
* performing the given action with the result of either this or |
811 |
|
|
* the other given CompletableFuture's result, when either |
812 |
|
|
* complete. If this and/or the other CompletableFuture complete |
813 |
|
|
* exceptionally, then the returned CompletableFuture may also do |
814 |
dl |
1.19 |
* so, with a CompletionException holding one of these exceptions as |
815 |
dl |
1.7 |
* its cause. No guarantees are made about which exception is |
816 |
|
|
* used in the returned CompletableFuture. |
817 |
|
|
* |
818 |
|
|
* @param other the other CompletableFuture |
819 |
|
|
* @param block the action to perform before completing the |
820 |
|
|
* returned CompletableFuture |
821 |
|
|
* @return the new CompletableFuture |
822 |
|
|
*/ |
823 |
dl |
1.17 |
public CompletableFuture<Void> acceptEitherAsync(CompletableFuture<? extends T> other, |
824 |
|
|
Block<? super T> block) { |
825 |
dl |
1.7 |
return orBlock(other, block, ForkJoinPool.commonPool()); |
826 |
|
|
} |
827 |
|
|
|
828 |
|
|
/** |
829 |
|
|
* Creates and returns a CompletableFuture that is completed |
830 |
|
|
* asynchronously using the given executor, |
831 |
|
|
* performing the given action with the result of either this or |
832 |
|
|
* the other given CompletableFuture's result, when either |
833 |
|
|
* complete. If this and/or the other CompletableFuture complete |
834 |
|
|
* exceptionally, then the returned CompletableFuture may also do |
835 |
dl |
1.19 |
* so, with a CompletionException holding one of these exceptions as |
836 |
dl |
1.7 |
* its cause. No guarantees are made about which exception is |
837 |
|
|
* used in the returned CompletableFuture. |
838 |
|
|
* |
839 |
|
|
* @param other the other CompletableFuture |
840 |
|
|
* @param block the action to perform before completing the |
841 |
|
|
* returned CompletableFuture |
842 |
|
|
* @param executor the executor to use for asynchronous execution |
843 |
|
|
* @return the new CompletableFuture |
844 |
|
|
*/ |
845 |
dl |
1.17 |
public CompletableFuture<Void> acceptEitherAsync(CompletableFuture<? extends T> other, |
846 |
|
|
Block<? super T> block, |
847 |
|
|
Executor executor) { |
848 |
dl |
1.7 |
if (executor == null) throw new NullPointerException(); |
849 |
|
|
return orBlock(other, block, executor); |
850 |
|
|
} |
851 |
|
|
|
852 |
|
|
/** |
853 |
dl |
1.1 |
* Creates and returns a CompletableFuture that is completed |
854 |
|
|
* after this or the other given CompletableFuture complete. If |
855 |
|
|
* this and/or the other CompletableFuture complete exceptionally, |
856 |
|
|
* then the returned CompletableFuture may also do so, with a |
857 |
dl |
1.19 |
* CompletionException holding one of these exceptions as its cause. |
858 |
dl |
1.1 |
* No guarantees are made about which exception is used in the |
859 |
|
|
* returned CompletableFuture. |
860 |
|
|
* |
861 |
|
|
* @param other the other CompletableFuture |
862 |
|
|
* @param action the action to perform before completing the |
863 |
|
|
* returned CompletableFuture |
864 |
|
|
* @return the new CompletableFuture |
865 |
|
|
*/ |
866 |
dl |
1.17 |
public CompletableFuture<Void> runAfterEither(CompletableFuture<?> other, |
867 |
|
|
Runnable action) { |
868 |
dl |
1.1 |
return orRunnable(other, action, null); |
869 |
|
|
} |
870 |
|
|
|
871 |
|
|
/** |
872 |
|
|
* Creates and returns a CompletableFuture that is completed |
873 |
|
|
* asynchronously using the {@link ForkJoinPool#commonPool()} |
874 |
|
|
* after this or the other given CompletableFuture complete. If |
875 |
|
|
* this and/or the other CompletableFuture complete exceptionally, |
876 |
|
|
* then the returned CompletableFuture may also do so, with a |
877 |
dl |
1.19 |
* CompletionException holding one of these exceptions as its cause. |
878 |
dl |
1.1 |
* No guarantees are made about which exception is used in the |
879 |
|
|
* returned CompletableFuture. |
880 |
|
|
* |
881 |
|
|
* @param other the other CompletableFuture |
882 |
|
|
* @param action the action to perform before completing the |
883 |
|
|
* returned CompletableFuture |
884 |
|
|
* @return the new CompletableFuture |
885 |
|
|
*/ |
886 |
dl |
1.17 |
public CompletableFuture<Void> runAfterEitherAsync(CompletableFuture<?> other, |
887 |
|
|
Runnable action) { |
888 |
dl |
1.1 |
return orRunnable(other, action, ForkJoinPool.commonPool()); |
889 |
|
|
} |
890 |
|
|
|
891 |
|
|
/** |
892 |
|
|
* Creates and returns a CompletableFuture that is completed |
893 |
|
|
* asynchronously using the given executor after this or the other |
894 |
|
|
* given CompletableFuture complete. If this and/or the other |
895 |
|
|
* CompletableFuture complete exceptionally, then the returned |
896 |
dl |
1.19 |
* CompletableFuture may also do so, with a CompletionException |
897 |
|
|
* holding one of these exceptions as its cause. No guarantees are |
898 |
dl |
1.1 |
* made about which exception is used in the returned |
899 |
|
|
* CompletableFuture. |
900 |
|
|
* |
901 |
|
|
* @param other the other CompletableFuture |
902 |
|
|
* @param action the action to perform before completing the |
903 |
|
|
* returned CompletableFuture |
904 |
|
|
* @param executor the executor to use for asynchronous execution |
905 |
|
|
* @return the new CompletableFuture |
906 |
|
|
*/ |
907 |
dl |
1.17 |
public CompletableFuture<Void> runAfterEitherAsync(CompletableFuture<?> other, |
908 |
|
|
Runnable action, |
909 |
|
|
Executor executor) { |
910 |
dl |
1.1 |
if (executor == null) throw new NullPointerException(); |
911 |
|
|
return orRunnable(other, action, executor); |
912 |
|
|
} |
913 |
|
|
|
914 |
|
|
/** |
915 |
dl |
1.17 |
* Returns a CompletableFuture equal or equivalent to that |
916 |
|
|
* produced by the given function of the result of this |
917 |
|
|
* CompletableFuture when completed. If this CompletableFuture |
918 |
|
|
* completes exceptionally, then the returned CompletableFuture |
919 |
dl |
1.19 |
* also does so, with a CompletionException holding this exception as |
920 |
dl |
1.17 |
* its cause. |
921 |
|
|
* |
922 |
|
|
* @param fn the function returning a new CompletableFuture. |
923 |
|
|
* @return the CompletableFuture, that {@code isDone()} upon |
924 |
|
|
* return if completed by the given function, or an exception |
925 |
|
|
* occurs. |
926 |
|
|
*/ |
927 |
|
|
public <U> CompletableFuture<U> thenCompose(Function<? super T, |
928 |
|
|
CompletableFuture<U>> fn) { |
929 |
|
|
if (fn == null) throw new NullPointerException(); |
930 |
|
|
CompletableFuture<U> dst = null; |
931 |
|
|
ThenCompose<T,U> d = null; |
932 |
|
|
Object r; |
933 |
|
|
if ((r = result) == null) { |
934 |
|
|
dst = new CompletableFuture<U>(); |
935 |
|
|
CompletionNode p = new CompletionNode |
936 |
|
|
(d = new ThenCompose<T,U>(this, fn, dst)); |
937 |
|
|
while ((r = result) == null) { |
938 |
|
|
if (UNSAFE.compareAndSwapObject |
939 |
|
|
(this, COMPLETIONS, p.next = completions, p)) |
940 |
|
|
break; |
941 |
|
|
} |
942 |
|
|
} |
943 |
|
|
if (r != null && (d == null || d.compareAndSet(0, 1))) { |
944 |
|
|
T t; Throwable ex = null; |
945 |
|
|
if (r instanceof AltResult) { |
946 |
|
|
ex = ((AltResult)r).ex; |
947 |
|
|
t = null; |
948 |
|
|
} |
949 |
|
|
else |
950 |
|
|
t = (T) r; |
951 |
|
|
if (ex == null) { |
952 |
|
|
try { |
953 |
|
|
dst = fn.apply(t); |
954 |
|
|
} catch (Throwable rex) { |
955 |
|
|
ex = rex; |
956 |
|
|
} |
957 |
|
|
} |
958 |
|
|
if (dst == null) { |
959 |
|
|
dst = new CompletableFuture<U>(); |
960 |
|
|
if (ex == null) |
961 |
|
|
ex = new NullPointerException(); |
962 |
|
|
} |
963 |
|
|
if (ex != null) |
964 |
dl |
1.19 |
dst.propagateException(ex); |
965 |
dl |
1.17 |
} |
966 |
|
|
if (r != null || result != null) |
967 |
|
|
postComplete(); |
968 |
|
|
return dst; |
969 |
|
|
} |
970 |
|
|
|
971 |
|
|
/** |
972 |
dl |
1.6 |
* Creates and returns a CompletableFuture that is completed with |
973 |
|
|
* the result of the given function of the exception triggering |
974 |
dl |
1.7 |
* this CompletableFuture's completion when it completes |
975 |
dl |
1.6 |
* exceptionally; Otherwise, if this CompletableFuture completes |
976 |
|
|
* normally, then the returned CompletableFuture also completes |
977 |
|
|
* normally with the same value. |
978 |
|
|
* |
979 |
|
|
* @param fn the function to use to compute the value of the |
980 |
|
|
* returned CompletableFuture if this CompletableFuture completed |
981 |
|
|
* exceptionally |
982 |
dl |
1.1 |
* @return the new CompletableFuture |
983 |
|
|
*/ |
984 |
dl |
1.6 |
public CompletableFuture<T> exceptionally(Function<Throwable, ? extends T> fn) { |
985 |
|
|
if (fn == null) throw new NullPointerException(); |
986 |
|
|
CompletableFuture<T> dst = new CompletableFuture<T>(); |
987 |
dl |
1.1 |
ExceptionAction<T> d = null; |
988 |
dl |
1.6 |
Object r; |
989 |
jsr166 |
1.2 |
if ((r = result) == null) { |
990 |
dl |
1.1 |
CompletionNode p = |
991 |
dl |
1.6 |
new CompletionNode(d = new ExceptionAction<T>(this, fn, dst)); |
992 |
dl |
1.1 |
while ((r = result) == null) { |
993 |
|
|
if (UNSAFE.compareAndSwapObject(this, COMPLETIONS, |
994 |
|
|
p.next = completions, p)) |
995 |
|
|
break; |
996 |
|
|
} |
997 |
|
|
} |
998 |
dl |
1.6 |
if (r != null && (d == null || d.compareAndSet(0, 1))) { |
999 |
|
|
T t; Throwable ex = null; |
1000 |
|
|
if (r instanceof AltResult) { |
1001 |
|
|
if ((ex = ((AltResult)r).ex) != null) { |
1002 |
|
|
try { |
1003 |
|
|
dst.complete(fn.apply(ex)); |
1004 |
|
|
} catch (Throwable rex) { |
1005 |
|
|
dst.completeExceptionally(rex); |
1006 |
|
|
} |
1007 |
|
|
} |
1008 |
|
|
t = null; |
1009 |
dl |
1.1 |
} |
1010 |
dl |
1.6 |
else |
1011 |
|
|
t = (T) r; |
1012 |
|
|
if (ex == null) |
1013 |
|
|
dst.complete(t); |
1014 |
dl |
1.1 |
} |
1015 |
dl |
1.17 |
if (r != null || result != null) |
1016 |
|
|
postComplete(); |
1017 |
|
|
return dst; |
1018 |
|
|
} |
1019 |
|
|
|
1020 |
|
|
/** |
1021 |
|
|
* Creates and returns a CompletableFuture that is completed with |
1022 |
|
|
* the result of the given function of the result and exception of |
1023 |
|
|
* this CompletableFuture's completion when it completes. The |
1024 |
|
|
* given function is invoked with the result (or {@code null} if |
1025 |
|
|
* none) and the exception (or {@code null} if none) of this |
1026 |
|
|
* CompletableFuture when complete. |
1027 |
|
|
* |
1028 |
|
|
* @param fn the function to use to compute the value of the |
1029 |
|
|
* returned CompletableFuture |
1030 |
|
|
|
1031 |
|
|
* @return the new CompletableFuture |
1032 |
|
|
*/ |
1033 |
|
|
public <U> CompletableFuture<U> handle(BiFunction<? super T, Throwable, ? extends U> fn) { |
1034 |
|
|
if (fn == null) throw new NullPointerException(); |
1035 |
|
|
CompletableFuture<U> dst = new CompletableFuture<U>(); |
1036 |
|
|
ThenHandle<T,U> d = null; |
1037 |
|
|
Object r; |
1038 |
|
|
if ((r = result) == null) { |
1039 |
|
|
CompletionNode p = |
1040 |
|
|
new CompletionNode(d = new ThenHandle<T,U>(this, fn, dst)); |
1041 |
|
|
while ((r = result) == null) { |
1042 |
|
|
if (UNSAFE.compareAndSwapObject(this, COMPLETIONS, |
1043 |
|
|
p.next = completions, p)) |
1044 |
|
|
break; |
1045 |
|
|
} |
1046 |
|
|
} |
1047 |
|
|
if (r != null && (d == null || d.compareAndSet(0, 1))) { |
1048 |
|
|
T t; Throwable ex; |
1049 |
|
|
if (r instanceof AltResult) { |
1050 |
|
|
ex = ((AltResult)r).ex; |
1051 |
|
|
t = null; |
1052 |
|
|
} |
1053 |
|
|
else { |
1054 |
|
|
ex = null; |
1055 |
|
|
t = (T) r; |
1056 |
|
|
} |
1057 |
|
|
try { |
1058 |
|
|
dst.complete(fn.apply(t, ex)); |
1059 |
|
|
} catch (Throwable rex) { |
1060 |
|
|
dst.completeExceptionally(rex); |
1061 |
|
|
} |
1062 |
|
|
} |
1063 |
|
|
if (r != null || result != null) |
1064 |
dl |
1.1 |
postComplete(); |
1065 |
|
|
return dst; |
1066 |
|
|
} |
1067 |
|
|
|
1068 |
|
|
/** |
1069 |
|
|
* Attempts to complete this CompletableFuture with |
1070 |
|
|
* a {@link CancellationException}. |
1071 |
|
|
* |
1072 |
|
|
* @param mayInterruptIfRunning this value has no effect in this |
1073 |
|
|
* implementation because interrupts are not used to control |
1074 |
|
|
* processing. |
1075 |
|
|
* |
1076 |
|
|
* @return {@code true} if this task is now cancelled |
1077 |
|
|
*/ |
1078 |
|
|
public boolean cancel(boolean mayInterruptIfRunning) { |
1079 |
|
|
Object r; |
1080 |
|
|
while ((r = result) == null) { |
1081 |
|
|
r = new AltResult(new CancellationException()); |
1082 |
|
|
if (UNSAFE.compareAndSwapObject(this, RESULT, null, r)) { |
1083 |
|
|
postComplete(); |
1084 |
|
|
return true; |
1085 |
|
|
} |
1086 |
|
|
} |
1087 |
|
|
return ((r instanceof AltResult) && |
1088 |
|
|
(((AltResult)r).ex instanceof CancellationException)); |
1089 |
|
|
} |
1090 |
|
|
|
1091 |
|
|
/** |
1092 |
|
|
* Returns {@code true} if this CompletableFuture was cancelled |
1093 |
|
|
* before it completed normally. |
1094 |
|
|
* |
1095 |
|
|
* @return {@code true} if this CompletableFuture was cancelled |
1096 |
|
|
* before it completed normally |
1097 |
|
|
*/ |
1098 |
|
|
public boolean isCancelled() { |
1099 |
|
|
Object r; |
1100 |
|
|
return ((r = result) != null && |
1101 |
|
|
(r instanceof AltResult) && |
1102 |
|
|
(((AltResult)r).ex instanceof CancellationException)); |
1103 |
|
|
} |
1104 |
|
|
|
1105 |
|
|
/** |
1106 |
dl |
1.6 |
* Forcibly sets or resets the value subsequently returned by |
1107 |
|
|
* method get() and related methods, whether or not already |
1108 |
|
|
* completed. This method is designed for use only in error |
1109 |
|
|
* recovery actions, and even in such situations may result in |
1110 |
|
|
* ongoing dependent completions using established versus |
1111 |
|
|
* overwritten values. |
1112 |
dl |
1.1 |
* |
1113 |
|
|
* @param value the completion value |
1114 |
|
|
*/ |
1115 |
dl |
1.6 |
public void obtrudeValue(T value) { |
1116 |
jsr166 |
1.2 |
result = (value == null) ? NIL : value; |
1117 |
dl |
1.1 |
postComplete(); |
1118 |
|
|
} |
1119 |
|
|
|
1120 |
|
|
/** |
1121 |
jsr166 |
1.10 |
* Removes and signals all waiting threads and runs all completions. |
1122 |
dl |
1.1 |
*/ |
1123 |
|
|
private void postComplete() { |
1124 |
|
|
WaitNode q; Thread t; |
1125 |
|
|
while ((q = waiters) != null) { |
1126 |
|
|
if (UNSAFE.compareAndSwapObject(this, WAITERS, q, q.next) && |
1127 |
|
|
(t = q.thread) != null) { |
1128 |
|
|
q.thread = null; |
1129 |
|
|
LockSupport.unpark(t); |
1130 |
|
|
} |
1131 |
|
|
} |
1132 |
|
|
|
1133 |
|
|
CompletionNode h; Completion c; |
1134 |
|
|
while ((h = completions) != null) { |
1135 |
|
|
if (UNSAFE.compareAndSwapObject(this, COMPLETIONS, h, h.next) && |
1136 |
|
|
(c = h.completion) != null) |
1137 |
|
|
c.run(); |
1138 |
|
|
} |
1139 |
|
|
} |
1140 |
|
|
|
1141 |
|
|
/* ------------- waiting for completions -------------- */ |
1142 |
|
|
|
1143 |
jsr166 |
1.2 |
/** |
1144 |
dl |
1.1 |
* Heuristic spin value for waitingGet() before blocking on |
1145 |
|
|
* multiprocessors |
1146 |
|
|
*/ |
1147 |
|
|
static final int WAITING_GET_SPINS = 256; |
1148 |
|
|
|
1149 |
|
|
/** |
1150 |
dl |
1.19 |
* Returns raw result after waiting, or null if interruptible and |
1151 |
|
|
* interrupted. |
1152 |
dl |
1.1 |
*/ |
1153 |
dl |
1.19 |
private Object waitingGet(boolean interruptible) { |
1154 |
dl |
1.1 |
WaitNode q = null; |
1155 |
|
|
boolean queued = false, interrupted = false; |
1156 |
|
|
int h = 0, spins = 0; |
1157 |
|
|
for (Object r;;) { |
1158 |
|
|
if ((r = result) != null) { |
1159 |
dl |
1.5 |
Throwable ex; |
1160 |
dl |
1.1 |
if (q != null) // suppress unpark |
1161 |
|
|
q.thread = null; |
1162 |
|
|
postComplete(); // help release others |
1163 |
|
|
if (interrupted) |
1164 |
|
|
Thread.currentThread().interrupt(); |
1165 |
dl |
1.19 |
return r; |
1166 |
dl |
1.1 |
} |
1167 |
|
|
else if (h == 0) { |
1168 |
|
|
h = ThreadLocalRandom.current().nextInt(); |
1169 |
|
|
if (Runtime.getRuntime().availableProcessors() > 1) |
1170 |
|
|
spins = WAITING_GET_SPINS; |
1171 |
|
|
} |
1172 |
|
|
else if (spins > 0) { |
1173 |
|
|
h ^= h << 1; // xorshift |
1174 |
jsr166 |
1.2 |
h ^= h >>> 3; |
1175 |
dl |
1.1 |
if ((h ^= h << 10) >= 0) |
1176 |
|
|
--spins; |
1177 |
jsr166 |
1.2 |
} |
1178 |
dl |
1.1 |
else if (q == null) |
1179 |
|
|
q = new WaitNode(); |
1180 |
|
|
else if (!queued) |
1181 |
|
|
queued = UNSAFE.compareAndSwapObject(this, WAITERS, |
1182 |
|
|
q.next = waiters, q); |
1183 |
dl |
1.19 |
else if (Thread.interrupted()) { |
1184 |
|
|
if (interruptible) |
1185 |
|
|
return null; |
1186 |
dl |
1.1 |
interrupted = true; |
1187 |
dl |
1.19 |
} |
1188 |
dl |
1.1 |
else if (q.thread == null) |
1189 |
|
|
q.thread = Thread.currentThread(); |
1190 |
|
|
else |
1191 |
|
|
LockSupport.park(this); |
1192 |
|
|
} |
1193 |
|
|
} |
1194 |
|
|
|
1195 |
|
|
/** |
1196 |
|
|
* Awaits completion or aborts on interrupt or timeout. |
1197 |
|
|
* |
1198 |
|
|
* @param nanos time to wait |
1199 |
|
|
* @return raw result |
1200 |
|
|
*/ |
1201 |
|
|
private Object timedAwaitDone(long nanos) |
1202 |
|
|
throws InterruptedException, TimeoutException { |
1203 |
|
|
final long deadline = System.nanoTime() + nanos; |
1204 |
|
|
WaitNode q = null; |
1205 |
|
|
boolean queued = false; |
1206 |
|
|
for (Object r;;) { |
1207 |
|
|
if (Thread.interrupted()) { |
1208 |
|
|
removeWaiter(q); |
1209 |
|
|
throw new InterruptedException(); |
1210 |
|
|
} |
1211 |
|
|
else if ((r = result) != null) { |
1212 |
|
|
if (q != null) |
1213 |
|
|
q.thread = null; |
1214 |
|
|
postComplete(); |
1215 |
|
|
return r; |
1216 |
|
|
} |
1217 |
|
|
else if (q == null) |
1218 |
|
|
q = new WaitNode(); |
1219 |
|
|
else if (!queued) |
1220 |
|
|
queued = UNSAFE.compareAndSwapObject(this, WAITERS, |
1221 |
|
|
q.next = waiters, q); |
1222 |
|
|
else if ((nanos = deadline - System.nanoTime()) <= 0L) { |
1223 |
|
|
removeWaiter(q); |
1224 |
|
|
throw new TimeoutException(); |
1225 |
|
|
} |
1226 |
|
|
else if (q.thread == null) |
1227 |
|
|
q.thread = Thread.currentThread(); |
1228 |
|
|
else |
1229 |
|
|
LockSupport.parkNanos(this, nanos); |
1230 |
|
|
} |
1231 |
|
|
} |
1232 |
|
|
|
1233 |
|
|
/** |
1234 |
|
|
* Tries to unlink a timed-out or interrupted wait node to avoid |
1235 |
|
|
* accumulating garbage. Internal nodes are simply unspliced |
1236 |
|
|
* without CAS since it is harmless if they are traversed anyway |
1237 |
|
|
* by releasers. To avoid effects of unsplicing from already |
1238 |
|
|
* removed nodes, the list is retraversed in case of an apparent |
1239 |
|
|
* race. This is slow when there are a lot of nodes, but we don't |
1240 |
|
|
* expect lists to be long enough to outweigh higher-overhead |
1241 |
|
|
* schemes. |
1242 |
|
|
*/ |
1243 |
|
|
private void removeWaiter(WaitNode node) { |
1244 |
|
|
if (node != null) { |
1245 |
|
|
node.thread = null; |
1246 |
|
|
retry: |
1247 |
|
|
for (;;) { // restart on removeWaiter race |
1248 |
|
|
for (WaitNode pred = null, q = waiters, s; q != null; q = s) { |
1249 |
|
|
s = q.next; |
1250 |
|
|
if (q.thread != null) |
1251 |
|
|
pred = q; |
1252 |
|
|
else if (pred != null) { |
1253 |
|
|
pred.next = s; |
1254 |
|
|
if (pred.thread == null) // check for race |
1255 |
|
|
continue retry; |
1256 |
|
|
} |
1257 |
|
|
else if (!UNSAFE.compareAndSwapObject(this, WAITERS, q, s)) |
1258 |
|
|
continue retry; |
1259 |
|
|
} |
1260 |
|
|
break; |
1261 |
|
|
} |
1262 |
|
|
} |
1263 |
|
|
} |
1264 |
|
|
|
1265 |
|
|
/* ------------- Async tasks -------------- */ |
1266 |
|
|
|
1267 |
|
|
/** Base class can act as either FJ or plain Runnable */ |
1268 |
|
|
static abstract class Async extends ForkJoinTask<Void> implements Runnable { |
1269 |
|
|
public final Void getRawResult() { return null; } |
1270 |
|
|
public final void setRawResult(Void v) { } |
1271 |
|
|
public final void run() { exec(); } |
1272 |
|
|
} |
1273 |
|
|
|
1274 |
|
|
static final class AsyncRunnable extends Async { |
1275 |
|
|
final Runnable runnable; |
1276 |
|
|
final CompletableFuture<Void> dst; |
1277 |
|
|
AsyncRunnable(Runnable runnable, CompletableFuture<Void> dst) { |
1278 |
|
|
this.runnable = runnable; this.dst = dst; |
1279 |
|
|
} |
1280 |
|
|
public final boolean exec() { |
1281 |
|
|
Runnable fn; |
1282 |
|
|
CompletableFuture<Void> d; |
1283 |
|
|
if ((fn = this.runnable) == null || (d = this.dst) == null) |
1284 |
|
|
throw new NullPointerException(); |
1285 |
|
|
try { |
1286 |
|
|
fn.run(); |
1287 |
|
|
d.complete(null); |
1288 |
|
|
} catch (Throwable ex) { |
1289 |
|
|
d.completeExceptionally(ex); |
1290 |
|
|
} |
1291 |
|
|
return true; |
1292 |
|
|
} |
1293 |
|
|
private static final long serialVersionUID = 5232453952276885070L; |
1294 |
|
|
} |
1295 |
|
|
|
1296 |
|
|
static final class AsyncSupplier<U> extends Async { |
1297 |
|
|
final Supplier<U> supplier; |
1298 |
|
|
final CompletableFuture<U> dst; |
1299 |
|
|
AsyncSupplier(Supplier<U> supplier, CompletableFuture<U> dst) { |
1300 |
|
|
this.supplier = supplier; this.dst = dst; |
1301 |
|
|
} |
1302 |
|
|
public final boolean exec() { |
1303 |
|
|
Supplier<U> fn; |
1304 |
|
|
CompletableFuture<U> d; |
1305 |
|
|
if ((fn = this.supplier) == null || (d = this.dst) == null) |
1306 |
|
|
throw new NullPointerException(); |
1307 |
|
|
try { |
1308 |
|
|
d.complete(fn.get()); |
1309 |
|
|
} catch (Throwable ex) { |
1310 |
|
|
d.completeExceptionally(ex); |
1311 |
|
|
} |
1312 |
|
|
return true; |
1313 |
|
|
} |
1314 |
|
|
private static final long serialVersionUID = 5232453952276885070L; |
1315 |
|
|
} |
1316 |
|
|
|
1317 |
|
|
static final class AsyncFunction<T,U> extends Async { |
1318 |
|
|
Function<? super T,? extends U> fn; |
1319 |
|
|
T arg; |
1320 |
|
|
final CompletableFuture<U> dst; |
1321 |
|
|
AsyncFunction(T arg, Function<? super T,? extends U> fn, |
1322 |
|
|
CompletableFuture<U> dst) { |
1323 |
|
|
this.arg = arg; this.fn = fn; this.dst = dst; |
1324 |
|
|
} |
1325 |
|
|
public final boolean exec() { |
1326 |
|
|
Function<? super T,? extends U> fn; |
1327 |
|
|
CompletableFuture<U> d; |
1328 |
|
|
if ((fn = this.fn) == null || (d = this.dst) == null) |
1329 |
|
|
throw new NullPointerException(); |
1330 |
|
|
try { |
1331 |
|
|
d.complete(fn.apply(arg)); |
1332 |
|
|
} catch (Throwable ex) { |
1333 |
|
|
d.completeExceptionally(ex); |
1334 |
|
|
} |
1335 |
|
|
return true; |
1336 |
|
|
} |
1337 |
|
|
private static final long serialVersionUID = 5232453952276885070L; |
1338 |
|
|
} |
1339 |
|
|
|
1340 |
|
|
static final class AsyncBiFunction<T,U,V> extends Async { |
1341 |
|
|
final BiFunction<? super T,? super U,? extends V> fn; |
1342 |
|
|
final T arg1; |
1343 |
|
|
final U arg2; |
1344 |
|
|
final CompletableFuture<V> dst; |
1345 |
|
|
AsyncBiFunction(T arg1, U arg2, |
1346 |
|
|
BiFunction<? super T,? super U,? extends V> fn, |
1347 |
|
|
CompletableFuture<V> dst) { |
1348 |
|
|
this.arg1 = arg1; this.arg2 = arg2; this.fn = fn; this.dst = dst; |
1349 |
|
|
} |
1350 |
|
|
public final boolean exec() { |
1351 |
|
|
BiFunction<? super T,? super U,? extends V> fn; |
1352 |
|
|
CompletableFuture<V> d; |
1353 |
|
|
if ((fn = this.fn) == null || (d = this.dst) == null) |
1354 |
|
|
throw new NullPointerException(); |
1355 |
|
|
try { |
1356 |
|
|
d.complete(fn.apply(arg1, arg2)); |
1357 |
|
|
} catch (Throwable ex) { |
1358 |
|
|
d.completeExceptionally(ex); |
1359 |
|
|
} |
1360 |
|
|
return true; |
1361 |
|
|
} |
1362 |
|
|
private static final long serialVersionUID = 5232453952276885070L; |
1363 |
|
|
} |
1364 |
|
|
|
1365 |
dl |
1.7 |
static final class AsyncBlock<T> extends Async { |
1366 |
|
|
Block<? super T> fn; |
1367 |
|
|
T arg; |
1368 |
|
|
final CompletableFuture<Void> dst; |
1369 |
|
|
AsyncBlock(T arg, Block<? super T> fn, |
1370 |
|
|
CompletableFuture<Void> dst) { |
1371 |
|
|
this.arg = arg; this.fn = fn; this.dst = dst; |
1372 |
|
|
} |
1373 |
|
|
public final boolean exec() { |
1374 |
|
|
Block<? super T> fn; |
1375 |
|
|
CompletableFuture<Void> d; |
1376 |
|
|
if ((fn = this.fn) == null || (d = this.dst) == null) |
1377 |
|
|
throw new NullPointerException(); |
1378 |
|
|
try { |
1379 |
|
|
fn.accept(arg); |
1380 |
|
|
d.complete(null); |
1381 |
|
|
} catch (Throwable ex) { |
1382 |
|
|
d.completeExceptionally(ex); |
1383 |
|
|
} |
1384 |
|
|
return true; |
1385 |
|
|
} |
1386 |
|
|
private static final long serialVersionUID = 5232453952276885070L; |
1387 |
|
|
} |
1388 |
|
|
|
1389 |
|
|
static final class AsyncBiBlock<T,U> extends Async { |
1390 |
|
|
final BiBlock<? super T,? super U> fn; |
1391 |
|
|
final T arg1; |
1392 |
|
|
final U arg2; |
1393 |
|
|
final CompletableFuture<Void> dst; |
1394 |
|
|
AsyncBiBlock(T arg1, U arg2, |
1395 |
|
|
BiBlock<? super T,? super U> fn, |
1396 |
|
|
CompletableFuture<Void> dst) { |
1397 |
|
|
this.arg1 = arg1; this.arg2 = arg2; this.fn = fn; this.dst = dst; |
1398 |
|
|
} |
1399 |
|
|
public final boolean exec() { |
1400 |
|
|
BiBlock<? super T,? super U> fn; |
1401 |
|
|
CompletableFuture<Void> d; |
1402 |
|
|
if ((fn = this.fn) == null || (d = this.dst) == null) |
1403 |
|
|
throw new NullPointerException(); |
1404 |
|
|
try { |
1405 |
|
|
fn.accept(arg1, arg2); |
1406 |
|
|
d.complete(null); |
1407 |
|
|
} catch (Throwable ex) { |
1408 |
|
|
d.completeExceptionally(ex); |
1409 |
|
|
} |
1410 |
|
|
return true; |
1411 |
|
|
} |
1412 |
|
|
private static final long serialVersionUID = 5232453952276885070L; |
1413 |
|
|
} |
1414 |
|
|
|
1415 |
dl |
1.1 |
/* ------------- Completions -------------- */ |
1416 |
|
|
|
1417 |
|
|
// Opportunistically subclass AtomicInteger to use compareAndSet to claim. |
1418 |
|
|
static abstract class Completion extends AtomicInteger implements Runnable { |
1419 |
|
|
} |
1420 |
|
|
|
1421 |
|
|
static final class ThenFunction<T,U> extends Completion { |
1422 |
jsr166 |
1.2 |
final CompletableFuture<? extends T> src; |
1423 |
|
|
final Function<? super T,? extends U> fn; |
1424 |
|
|
final CompletableFuture<U> dst; |
1425 |
dl |
1.1 |
final Executor executor; |
1426 |
|
|
ThenFunction(CompletableFuture<? extends T> src, |
1427 |
|
|
final Function<? super T,? extends U> fn, |
1428 |
|
|
final CompletableFuture<U> dst, Executor executor) { |
1429 |
|
|
this.src = src; this.fn = fn; this.dst = dst; |
1430 |
|
|
this.executor = executor; |
1431 |
|
|
} |
1432 |
jsr166 |
1.2 |
public void run() { |
1433 |
dl |
1.1 |
CompletableFuture<? extends T> a; |
1434 |
|
|
Function<? super T,? extends U> fn; |
1435 |
|
|
CompletableFuture<U> dst; |
1436 |
jsr166 |
1.2 |
Object r; T t; Throwable ex; |
1437 |
|
|
if ((dst = this.dst) != null && |
1438 |
dl |
1.1 |
(fn = this.fn) != null && |
1439 |
|
|
(a = this.src) != null && |
1440 |
|
|
(r = a.result) != null && |
1441 |
|
|
compareAndSet(0, 1)) { |
1442 |
jsr166 |
1.2 |
if (r instanceof AltResult) { |
1443 |
dl |
1.19 |
ex = ((AltResult)r).ex; |
1444 |
dl |
1.1 |
t = null; |
1445 |
|
|
} |
1446 |
dl |
1.17 |
else { |
1447 |
|
|
ex = null; |
1448 |
dl |
1.1 |
t = (T) r; |
1449 |
|
|
} |
1450 |
dl |
1.17 |
if (ex == null) { |
1451 |
|
|
try { |
1452 |
|
|
if (executor != null) |
1453 |
|
|
executor.execute(new AsyncFunction<T,U>(t, fn, dst)); |
1454 |
|
|
else |
1455 |
|
|
dst.complete(fn.apply(t)); |
1456 |
|
|
} catch (Throwable rex) { |
1457 |
|
|
ex = rex; |
1458 |
|
|
} |
1459 |
|
|
} |
1460 |
|
|
if (ex != null) |
1461 |
dl |
1.19 |
dst.propagateException(ex); |
1462 |
dl |
1.1 |
} |
1463 |
|
|
} |
1464 |
|
|
} |
1465 |
|
|
|
1466 |
dl |
1.7 |
static final class ThenBlock<T> extends Completion { |
1467 |
|
|
final CompletableFuture<? extends T> src; |
1468 |
|
|
final Block<? super T> fn; |
1469 |
|
|
final CompletableFuture<Void> dst; |
1470 |
|
|
final Executor executor; |
1471 |
|
|
ThenBlock(CompletableFuture<? extends T> src, |
1472 |
|
|
final Block<? super T> fn, |
1473 |
|
|
final CompletableFuture<Void> dst, Executor executor) { |
1474 |
|
|
this.src = src; this.fn = fn; this.dst = dst; |
1475 |
|
|
this.executor = executor; |
1476 |
|
|
} |
1477 |
|
|
public void run() { |
1478 |
|
|
CompletableFuture<? extends T> a; |
1479 |
|
|
Block<? super T> fn; |
1480 |
|
|
CompletableFuture<Void> dst; |
1481 |
|
|
Object r; T t; Throwable ex; |
1482 |
|
|
if ((dst = this.dst) != null && |
1483 |
|
|
(fn = this.fn) != null && |
1484 |
|
|
(a = this.src) != null && |
1485 |
|
|
(r = a.result) != null && |
1486 |
|
|
compareAndSet(0, 1)) { |
1487 |
|
|
if (r instanceof AltResult) { |
1488 |
dl |
1.19 |
ex = ((AltResult)r).ex; |
1489 |
dl |
1.7 |
t = null; |
1490 |
|
|
} |
1491 |
dl |
1.17 |
else { |
1492 |
|
|
ex = null; |
1493 |
dl |
1.7 |
t = (T) r; |
1494 |
dl |
1.17 |
} |
1495 |
|
|
if (ex == null) { |
1496 |
|
|
try { |
1497 |
|
|
if (executor != null) |
1498 |
|
|
executor.execute(new AsyncBlock<T>(t, fn, dst)); |
1499 |
|
|
else { |
1500 |
|
|
fn.accept(t); |
1501 |
|
|
dst.complete(null); |
1502 |
|
|
} |
1503 |
|
|
} catch (Throwable rex) { |
1504 |
|
|
ex = rex; |
1505 |
dl |
1.7 |
} |
1506 |
|
|
} |
1507 |
dl |
1.17 |
if (ex != null) |
1508 |
dl |
1.19 |
dst.propagateException(ex); |
1509 |
dl |
1.7 |
} |
1510 |
|
|
} |
1511 |
|
|
} |
1512 |
|
|
|
1513 |
dl |
1.1 |
static final class ThenRunnable<T> extends Completion { |
1514 |
jsr166 |
1.2 |
final CompletableFuture<? extends T> src; |
1515 |
|
|
final Runnable fn; |
1516 |
|
|
final CompletableFuture<Void> dst; |
1517 |
dl |
1.1 |
final Executor executor; |
1518 |
|
|
ThenRunnable(CompletableFuture<? extends T> src, |
1519 |
|
|
Runnable fn, |
1520 |
|
|
CompletableFuture<Void> dst, |
1521 |
|
|
Executor executor) { |
1522 |
|
|
this.src = src; this.fn = fn; this.dst = dst; |
1523 |
|
|
this.executor = executor; |
1524 |
|
|
} |
1525 |
jsr166 |
1.2 |
public void run() { |
1526 |
dl |
1.1 |
CompletableFuture<? extends T> a; |
1527 |
|
|
Runnable fn; |
1528 |
|
|
CompletableFuture<Void> dst; |
1529 |
jsr166 |
1.2 |
Object r; Throwable ex; |
1530 |
|
|
if ((dst = this.dst) != null && |
1531 |
dl |
1.1 |
(fn = this.fn) != null && |
1532 |
|
|
(a = this.src) != null && |
1533 |
|
|
(r = a.result) != null && |
1534 |
|
|
compareAndSet(0, 1)) { |
1535 |
dl |
1.19 |
if (r instanceof AltResult) |
1536 |
|
|
ex = ((AltResult)r).ex; |
1537 |
dl |
1.17 |
else |
1538 |
|
|
ex = null; |
1539 |
|
|
if (ex == null) { |
1540 |
|
|
try { |
1541 |
|
|
if (executor != null) |
1542 |
|
|
executor.execute(new AsyncRunnable(fn, dst)); |
1543 |
|
|
else { |
1544 |
|
|
fn.run(); |
1545 |
|
|
dst.complete(null); |
1546 |
|
|
} |
1547 |
|
|
} catch (Throwable rex) { |
1548 |
|
|
ex = rex; |
1549 |
dl |
1.1 |
} |
1550 |
|
|
} |
1551 |
dl |
1.17 |
if (ex != null) |
1552 |
dl |
1.19 |
dst.propagateException(ex); |
1553 |
dl |
1.1 |
} |
1554 |
|
|
} |
1555 |
|
|
} |
1556 |
|
|
|
1557 |
|
|
static final class AndFunction<T,U,V> extends Completion { |
1558 |
jsr166 |
1.2 |
final CompletableFuture<? extends T> src; |
1559 |
|
|
final CompletableFuture<? extends U> snd; |
1560 |
|
|
final BiFunction<? super T,? super U,? extends V> fn; |
1561 |
|
|
final CompletableFuture<V> dst; |
1562 |
dl |
1.1 |
final Executor executor; |
1563 |
|
|
AndFunction(CompletableFuture<? extends T> src, |
1564 |
|
|
CompletableFuture<? extends U> snd, |
1565 |
|
|
BiFunction<? super T,? super U,? extends V> fn, |
1566 |
|
|
CompletableFuture<V> dst, Executor executor) { |
1567 |
|
|
this.src = src; this.snd = snd; |
1568 |
|
|
this.fn = fn; this.dst = dst; |
1569 |
|
|
this.executor = executor; |
1570 |
|
|
} |
1571 |
jsr166 |
1.2 |
public void run() { |
1572 |
|
|
Object r, s; T t; U u; Throwable ex; |
1573 |
dl |
1.1 |
CompletableFuture<? extends T> a; |
1574 |
|
|
CompletableFuture<? extends U> b; |
1575 |
|
|
BiFunction<? super T,? super U,? extends V> fn; |
1576 |
|
|
CompletableFuture<V> dst; |
1577 |
jsr166 |
1.2 |
if ((dst = this.dst) != null && |
1578 |
dl |
1.1 |
(fn = this.fn) != null && |
1579 |
|
|
(a = this.src) != null && |
1580 |
|
|
(r = a.result) != null && |
1581 |
|
|
(b = this.snd) != null && |
1582 |
|
|
(s = b.result) != null && |
1583 |
|
|
compareAndSet(0, 1)) { |
1584 |
jsr166 |
1.2 |
if (r instanceof AltResult) { |
1585 |
dl |
1.19 |
ex = ((AltResult)r).ex; |
1586 |
jsr166 |
1.2 |
t = null; |
1587 |
|
|
} |
1588 |
dl |
1.19 |
else { |
1589 |
|
|
ex = null; |
1590 |
jsr166 |
1.2 |
t = (T) r; |
1591 |
dl |
1.19 |
} |
1592 |
|
|
if (ex != null) |
1593 |
|
|
u = null; |
1594 |
|
|
else if (s instanceof AltResult) { |
1595 |
|
|
ex = ((AltResult)s).ex; |
1596 |
jsr166 |
1.2 |
u = null; |
1597 |
|
|
} |
1598 |
|
|
else |
1599 |
|
|
u = (U) s; |
1600 |
dl |
1.19 |
if (ex == null) { |
1601 |
|
|
try { |
1602 |
|
|
if (executor != null) |
1603 |
|
|
executor.execute(new AsyncBiFunction<T,U,V>(t, u, fn, dst)); |
1604 |
|
|
else |
1605 |
|
|
dst.complete(fn.apply(t, u)); |
1606 |
|
|
} catch (Throwable rex) { |
1607 |
|
|
ex = rex; |
1608 |
|
|
} |
1609 |
dl |
1.1 |
} |
1610 |
dl |
1.19 |
if (ex != null) |
1611 |
|
|
dst.propagateException(ex); |
1612 |
jsr166 |
1.2 |
} |
1613 |
|
|
} |
1614 |
dl |
1.1 |
} |
1615 |
|
|
|
1616 |
dl |
1.7 |
static final class AndBlock<T,U> extends Completion { |
1617 |
|
|
final CompletableFuture<? extends T> src; |
1618 |
|
|
final CompletableFuture<? extends U> snd; |
1619 |
|
|
final BiBlock<? super T,? super U> fn; |
1620 |
|
|
final CompletableFuture<Void> dst; |
1621 |
|
|
final Executor executor; |
1622 |
|
|
AndBlock(CompletableFuture<? extends T> src, |
1623 |
|
|
CompletableFuture<? extends U> snd, |
1624 |
|
|
BiBlock<? super T,? super U> fn, |
1625 |
|
|
CompletableFuture<Void> dst, Executor executor) { |
1626 |
|
|
this.src = src; this.snd = snd; |
1627 |
|
|
this.fn = fn; this.dst = dst; |
1628 |
|
|
this.executor = executor; |
1629 |
|
|
} |
1630 |
|
|
public void run() { |
1631 |
|
|
Object r, s; T t; U u; Throwable ex; |
1632 |
|
|
CompletableFuture<? extends T> a; |
1633 |
|
|
CompletableFuture<? extends U> b; |
1634 |
|
|
BiBlock<? super T,? super U> fn; |
1635 |
|
|
CompletableFuture<Void> dst; |
1636 |
|
|
if ((dst = this.dst) != null && |
1637 |
|
|
(fn = this.fn) != null && |
1638 |
|
|
(a = this.src) != null && |
1639 |
|
|
(r = a.result) != null && |
1640 |
|
|
(b = this.snd) != null && |
1641 |
|
|
(s = b.result) != null && |
1642 |
|
|
compareAndSet(0, 1)) { |
1643 |
|
|
if (r instanceof AltResult) { |
1644 |
dl |
1.19 |
ex = ((AltResult)r).ex; |
1645 |
dl |
1.7 |
t = null; |
1646 |
|
|
} |
1647 |
dl |
1.19 |
else { |
1648 |
|
|
ex = null; |
1649 |
dl |
1.7 |
t = (T) r; |
1650 |
dl |
1.19 |
} |
1651 |
|
|
if (ex != null) |
1652 |
|
|
u = null; |
1653 |
|
|
else if (s instanceof AltResult) { |
1654 |
|
|
ex = ((AltResult)s).ex; |
1655 |
dl |
1.7 |
u = null; |
1656 |
|
|
} |
1657 |
|
|
else |
1658 |
|
|
u = (U) s; |
1659 |
dl |
1.19 |
if (ex == null) { |
1660 |
|
|
try { |
1661 |
|
|
if (executor != null) |
1662 |
|
|
executor.execute(new AsyncBiBlock<T,U>(t, u, fn, dst)); |
1663 |
|
|
else { |
1664 |
|
|
fn.accept(t, u); |
1665 |
|
|
dst.complete(null); |
1666 |
|
|
} |
1667 |
|
|
} catch (Throwable rex) { |
1668 |
|
|
ex = rex; |
1669 |
dl |
1.7 |
} |
1670 |
|
|
} |
1671 |
dl |
1.19 |
if (ex != null) |
1672 |
|
|
dst.propagateException(ex); |
1673 |
dl |
1.7 |
} |
1674 |
|
|
} |
1675 |
|
|
} |
1676 |
|
|
|
1677 |
dl |
1.1 |
static final class AndRunnable<T> extends Completion { |
1678 |
jsr166 |
1.2 |
final CompletableFuture<? extends T> src; |
1679 |
|
|
final CompletableFuture<?> snd; |
1680 |
|
|
final Runnable fn; |
1681 |
|
|
final CompletableFuture<Void> dst; |
1682 |
dl |
1.1 |
final Executor executor; |
1683 |
|
|
AndRunnable(CompletableFuture<? extends T> src, |
1684 |
|
|
CompletableFuture<?> snd, |
1685 |
|
|
Runnable fn, |
1686 |
|
|
CompletableFuture<Void> dst, Executor executor) { |
1687 |
|
|
this.src = src; this.snd = snd; |
1688 |
|
|
this.fn = fn; this.dst = dst; |
1689 |
|
|
this.executor = executor; |
1690 |
|
|
} |
1691 |
jsr166 |
1.2 |
public void run() { |
1692 |
|
|
Object r, s; Throwable ex; |
1693 |
dl |
1.1 |
final CompletableFuture<? extends T> a; |
1694 |
|
|
final CompletableFuture<?> b; |
1695 |
|
|
final Runnable fn; |
1696 |
|
|
final CompletableFuture<Void> dst; |
1697 |
jsr166 |
1.2 |
if ((dst = this.dst) != null && |
1698 |
dl |
1.1 |
(fn = this.fn) != null && |
1699 |
|
|
(a = this.src) != null && |
1700 |
|
|
(r = a.result) != null && |
1701 |
|
|
(b = this.snd) != null && |
1702 |
|
|
(s = b.result) != null && |
1703 |
|
|
compareAndSet(0, 1)) { |
1704 |
dl |
1.19 |
if (r instanceof AltResult) |
1705 |
|
|
ex = ((AltResult)r).ex; |
1706 |
|
|
else |
1707 |
|
|
ex = null; |
1708 |
|
|
if (ex == null && (s instanceof AltResult)) |
1709 |
|
|
ex = ((AltResult)s).ex; |
1710 |
|
|
if (ex == null) { |
1711 |
|
|
try { |
1712 |
|
|
if (executor != null) |
1713 |
|
|
executor.execute(new AsyncRunnable(fn, dst)); |
1714 |
|
|
else { |
1715 |
|
|
fn.run(); |
1716 |
|
|
dst.complete(null); |
1717 |
|
|
} |
1718 |
|
|
} catch (Throwable rex) { |
1719 |
|
|
ex = rex; |
1720 |
dl |
1.1 |
} |
1721 |
jsr166 |
1.2 |
} |
1722 |
dl |
1.19 |
if (ex != null) |
1723 |
|
|
dst.propagateException(ex); |
1724 |
jsr166 |
1.2 |
} |
1725 |
|
|
} |
1726 |
dl |
1.1 |
} |
1727 |
|
|
|
1728 |
|
|
static final class OrFunction<T,U> extends Completion { |
1729 |
jsr166 |
1.2 |
final CompletableFuture<? extends T> src; |
1730 |
|
|
final CompletableFuture<? extends T> snd; |
1731 |
|
|
final Function<? super T,? extends U> fn; |
1732 |
|
|
final CompletableFuture<U> dst; |
1733 |
dl |
1.1 |
final Executor executor; |
1734 |
|
|
OrFunction(CompletableFuture<? extends T> src, |
1735 |
|
|
CompletableFuture<? extends T> snd, |
1736 |
|
|
Function<? super T,? extends U> fn, |
1737 |
|
|
CompletableFuture<U> dst, Executor executor) { |
1738 |
|
|
this.src = src; this.snd = snd; |
1739 |
|
|
this.fn = fn; this.dst = dst; |
1740 |
|
|
this.executor = executor; |
1741 |
|
|
} |
1742 |
jsr166 |
1.2 |
public void run() { |
1743 |
|
|
Object r; T t; Throwable ex; |
1744 |
dl |
1.1 |
CompletableFuture<? extends T> a; |
1745 |
|
|
CompletableFuture<? extends T> b; |
1746 |
|
|
Function<? super T,? extends U> fn; |
1747 |
|
|
CompletableFuture<U> dst; |
1748 |
jsr166 |
1.2 |
if ((dst = this.dst) != null && |
1749 |
dl |
1.1 |
(fn = this.fn) != null && |
1750 |
|
|
(((a = this.src) != null && (r = a.result) != null) || |
1751 |
|
|
((b = this.snd) != null && (r = b.result) != null)) && |
1752 |
|
|
compareAndSet(0, 1)) { |
1753 |
jsr166 |
1.2 |
if (r instanceof AltResult) { |
1754 |
dl |
1.19 |
ex = ((AltResult)r).ex; |
1755 |
jsr166 |
1.2 |
t = null; |
1756 |
|
|
} |
1757 |
dl |
1.19 |
else { |
1758 |
|
|
ex = null; |
1759 |
jsr166 |
1.2 |
t = (T) r; |
1760 |
dl |
1.1 |
} |
1761 |
dl |
1.19 |
if (ex == null) { |
1762 |
|
|
try { |
1763 |
|
|
if (executor != null) |
1764 |
|
|
executor.execute(new AsyncFunction<T,U>(t, fn, dst)); |
1765 |
|
|
else |
1766 |
|
|
dst.complete(fn.apply(t)); |
1767 |
|
|
} catch (Throwable rex) { |
1768 |
|
|
ex = rex; |
1769 |
|
|
} |
1770 |
|
|
} |
1771 |
|
|
if (ex != null) |
1772 |
|
|
dst.propagateException(ex); |
1773 |
jsr166 |
1.2 |
} |
1774 |
|
|
} |
1775 |
dl |
1.1 |
} |
1776 |
|
|
|
1777 |
dl |
1.7 |
static final class OrBlock<T> extends Completion { |
1778 |
|
|
final CompletableFuture<? extends T> src; |
1779 |
|
|
final CompletableFuture<? extends T> snd; |
1780 |
|
|
final Block<? super T> fn; |
1781 |
|
|
final CompletableFuture<Void> dst; |
1782 |
|
|
final Executor executor; |
1783 |
|
|
OrBlock(CompletableFuture<? extends T> src, |
1784 |
|
|
CompletableFuture<? extends T> snd, |
1785 |
|
|
Block<? super T> fn, |
1786 |
|
|
CompletableFuture<Void> dst, Executor executor) { |
1787 |
|
|
this.src = src; this.snd = snd; |
1788 |
|
|
this.fn = fn; this.dst = dst; |
1789 |
|
|
this.executor = executor; |
1790 |
|
|
} |
1791 |
|
|
public void run() { |
1792 |
|
|
Object r; T t; Throwable ex; |
1793 |
|
|
CompletableFuture<? extends T> a; |
1794 |
|
|
CompletableFuture<? extends T> b; |
1795 |
|
|
Block<? super T> fn; |
1796 |
|
|
CompletableFuture<Void> dst; |
1797 |
|
|
if ((dst = this.dst) != null && |
1798 |
|
|
(fn = this.fn) != null && |
1799 |
|
|
(((a = this.src) != null && (r = a.result) != null) || |
1800 |
|
|
((b = this.snd) != null && (r = b.result) != null)) && |
1801 |
|
|
compareAndSet(0, 1)) { |
1802 |
|
|
if (r instanceof AltResult) { |
1803 |
dl |
1.19 |
ex = ((AltResult)r).ex; |
1804 |
dl |
1.7 |
t = null; |
1805 |
|
|
} |
1806 |
dl |
1.19 |
else { |
1807 |
|
|
ex = null; |
1808 |
dl |
1.7 |
t = (T) r; |
1809 |
dl |
1.19 |
} |
1810 |
|
|
if (ex == null) { |
1811 |
|
|
try { |
1812 |
|
|
if (executor != null) |
1813 |
|
|
executor.execute(new AsyncBlock<T>(t, fn, dst)); |
1814 |
|
|
else { |
1815 |
|
|
fn.accept(t); |
1816 |
|
|
dst.complete(null); |
1817 |
|
|
} |
1818 |
|
|
} catch (Throwable rex) { |
1819 |
|
|
ex = rex; |
1820 |
dl |
1.7 |
} |
1821 |
|
|
} |
1822 |
dl |
1.19 |
if (ex != null) |
1823 |
|
|
dst.propagateException(ex); |
1824 |
dl |
1.7 |
} |
1825 |
|
|
} |
1826 |
|
|
} |
1827 |
|
|
|
1828 |
dl |
1.1 |
static final class OrRunnable<T> extends Completion { |
1829 |
jsr166 |
1.2 |
final CompletableFuture<? extends T> src; |
1830 |
|
|
final CompletableFuture<?> snd; |
1831 |
|
|
final Runnable fn; |
1832 |
|
|
final CompletableFuture<Void> dst; |
1833 |
dl |
1.1 |
final Executor executor; |
1834 |
|
|
OrRunnable(CompletableFuture<? extends T> src, |
1835 |
|
|
CompletableFuture<?> snd, |
1836 |
|
|
Runnable fn, |
1837 |
|
|
CompletableFuture<Void> dst, Executor executor) { |
1838 |
|
|
this.src = src; this.snd = snd; |
1839 |
|
|
this.fn = fn; this.dst = dst; |
1840 |
|
|
this.executor = executor; |
1841 |
|
|
} |
1842 |
jsr166 |
1.2 |
public void run() { |
1843 |
|
|
Object r; Throwable ex; |
1844 |
dl |
1.1 |
CompletableFuture<? extends T> a; |
1845 |
|
|
final CompletableFuture<?> b; |
1846 |
|
|
final Runnable fn; |
1847 |
|
|
final CompletableFuture<Void> dst; |
1848 |
jsr166 |
1.2 |
if ((dst = this.dst) != null && |
1849 |
dl |
1.1 |
(fn = this.fn) != null && |
1850 |
|
|
(((a = this.src) != null && (r = a.result) != null) || |
1851 |
|
|
((b = this.snd) != null && (r = b.result) != null)) && |
1852 |
|
|
compareAndSet(0, 1)) { |
1853 |
dl |
1.19 |
if (r instanceof AltResult) |
1854 |
|
|
ex = ((AltResult)r).ex; |
1855 |
|
|
else |
1856 |
|
|
ex = null; |
1857 |
|
|
if (ex == null) { |
1858 |
dl |
1.1 |
try { |
1859 |
|
|
if (executor != null) |
1860 |
|
|
executor.execute(new AsyncRunnable(fn, dst)); |
1861 |
|
|
else { |
1862 |
|
|
fn.run(); |
1863 |
|
|
dst.complete(null); |
1864 |
|
|
} |
1865 |
|
|
} catch (Throwable rex) { |
1866 |
dl |
1.19 |
ex = rex; |
1867 |
dl |
1.1 |
} |
1868 |
|
|
} |
1869 |
dl |
1.19 |
if (ex != null) |
1870 |
|
|
dst.propagateException(ex); |
1871 |
jsr166 |
1.2 |
} |
1872 |
|
|
} |
1873 |
dl |
1.1 |
} |
1874 |
|
|
|
1875 |
|
|
static final class ExceptionAction<T> extends Completion { |
1876 |
jsr166 |
1.2 |
final CompletableFuture<? extends T> src; |
1877 |
dl |
1.6 |
final Function<? super Throwable, ? extends T> fn; |
1878 |
|
|
final CompletableFuture<T> dst; |
1879 |
dl |
1.1 |
ExceptionAction(CompletableFuture<? extends T> src, |
1880 |
dl |
1.6 |
Function<? super Throwable, ? extends T> fn, |
1881 |
|
|
CompletableFuture<T> dst) { |
1882 |
dl |
1.1 |
this.src = src; this.fn = fn; this.dst = dst; |
1883 |
|
|
} |
1884 |
jsr166 |
1.2 |
public void run() { |
1885 |
dl |
1.1 |
CompletableFuture<? extends T> a; |
1886 |
dl |
1.6 |
Function<? super Throwable, ? extends T> fn; |
1887 |
|
|
CompletableFuture<T> dst; |
1888 |
|
|
Object r; T t; Throwable ex; |
1889 |
jsr166 |
1.2 |
if ((dst = this.dst) != null && |
1890 |
dl |
1.1 |
(fn = this.fn) != null && |
1891 |
|
|
(a = this.src) != null && |
1892 |
|
|
(r = a.result) != null && |
1893 |
|
|
compareAndSet(0, 1)) { |
1894 |
dl |
1.6 |
if (r instanceof AltResult) { |
1895 |
|
|
if ((ex = ((AltResult)r).ex) != null) { |
1896 |
|
|
try { |
1897 |
|
|
dst.complete(fn.apply(ex)); |
1898 |
|
|
} catch (Throwable rex) { |
1899 |
|
|
dst.completeExceptionally(rex); |
1900 |
|
|
} |
1901 |
|
|
return; |
1902 |
dl |
1.1 |
} |
1903 |
dl |
1.6 |
t = null; |
1904 |
dl |
1.1 |
} |
1905 |
dl |
1.6 |
else |
1906 |
|
|
t = (T) r; |
1907 |
|
|
dst.complete(t); |
1908 |
dl |
1.1 |
} |
1909 |
|
|
} |
1910 |
|
|
} |
1911 |
|
|
|
1912 |
dl |
1.17 |
static final class ThenCopy<T> extends Completion { |
1913 |
|
|
final CompletableFuture<? extends T> src; |
1914 |
|
|
final CompletableFuture<T> dst; |
1915 |
|
|
ThenCopy(CompletableFuture<? extends T> src, |
1916 |
|
|
CompletableFuture<T> dst) { |
1917 |
|
|
this.src = src; this.dst = dst; |
1918 |
|
|
} |
1919 |
|
|
public void run() { |
1920 |
|
|
CompletableFuture<? extends T> a; |
1921 |
|
|
CompletableFuture<T> dst; |
1922 |
|
|
Object r; T t; Throwable ex; |
1923 |
|
|
if ((dst = this.dst) != null && |
1924 |
|
|
(a = this.src) != null && |
1925 |
|
|
(r = a.result) != null && |
1926 |
|
|
compareAndSet(0, 1)) { |
1927 |
dl |
1.19 |
dst.propagateCompletion(r); |
1928 |
dl |
1.17 |
} |
1929 |
|
|
} |
1930 |
|
|
} |
1931 |
|
|
|
1932 |
|
|
static final class ThenHandle<T,U> extends Completion { |
1933 |
|
|
final CompletableFuture<? extends T> src; |
1934 |
|
|
final BiFunction<? super T, Throwable, ? extends U> fn; |
1935 |
|
|
final CompletableFuture<U> dst; |
1936 |
|
|
ThenHandle(CompletableFuture<? extends T> src, |
1937 |
|
|
BiFunction<? super T, Throwable, ? extends U> fn, |
1938 |
|
|
final CompletableFuture<U> dst) { |
1939 |
|
|
this.src = src; this.fn = fn; this.dst = dst; |
1940 |
|
|
} |
1941 |
|
|
public void run() { |
1942 |
|
|
CompletableFuture<? extends T> a; |
1943 |
|
|
BiFunction<? super T, Throwable, ? extends U> fn; |
1944 |
|
|
CompletableFuture<U> dst; |
1945 |
|
|
Object r; T t; Throwable ex; |
1946 |
|
|
if ((dst = this.dst) != null && |
1947 |
|
|
(fn = this.fn) != null && |
1948 |
|
|
(a = this.src) != null && |
1949 |
|
|
(r = a.result) != null && |
1950 |
|
|
compareAndSet(0, 1)) { |
1951 |
|
|
if (r instanceof AltResult) { |
1952 |
|
|
ex = ((AltResult)r).ex; |
1953 |
|
|
t = null; |
1954 |
|
|
} |
1955 |
|
|
else { |
1956 |
|
|
ex = null; |
1957 |
|
|
t = (T) r; |
1958 |
|
|
} |
1959 |
|
|
try { |
1960 |
|
|
dst.complete(fn.apply(t, ex)); |
1961 |
|
|
} catch (Throwable rex) { |
1962 |
|
|
dst.completeExceptionally(rex); |
1963 |
|
|
} |
1964 |
|
|
} |
1965 |
|
|
} |
1966 |
|
|
} |
1967 |
|
|
|
1968 |
|
|
static final class ThenCompose<T,U> extends Completion { |
1969 |
|
|
final CompletableFuture<? extends T> src; |
1970 |
|
|
final Function<? super T, CompletableFuture<U>> fn; |
1971 |
|
|
final CompletableFuture<U> dst; |
1972 |
|
|
ThenCompose(CompletableFuture<? extends T> src, |
1973 |
|
|
Function<? super T, CompletableFuture<U>> fn, |
1974 |
|
|
final CompletableFuture<U> dst) { |
1975 |
|
|
this.src = src; this.fn = fn; this.dst = dst; |
1976 |
|
|
} |
1977 |
|
|
public void run() { |
1978 |
|
|
CompletableFuture<? extends T> a; |
1979 |
|
|
Function<? super T, CompletableFuture<U>> fn; |
1980 |
|
|
CompletableFuture<U> dst; |
1981 |
|
|
Object r; T t; Throwable ex; |
1982 |
|
|
if ((dst = this.dst) != null && |
1983 |
|
|
(fn = this.fn) != null && |
1984 |
|
|
(a = this.src) != null && |
1985 |
|
|
(r = a.result) != null && |
1986 |
|
|
compareAndSet(0, 1)) { |
1987 |
|
|
if (r instanceof AltResult) { |
1988 |
|
|
ex = ((AltResult)r).ex; |
1989 |
|
|
t = null; |
1990 |
|
|
} |
1991 |
|
|
else { |
1992 |
|
|
ex = null; |
1993 |
|
|
t = (T) r; |
1994 |
|
|
} |
1995 |
|
|
CompletableFuture<U> c = null; |
1996 |
|
|
if (ex == null) { |
1997 |
|
|
try { |
1998 |
|
|
c = fn.apply(t); |
1999 |
|
|
} catch (Throwable rex) { |
2000 |
|
|
ex = rex; |
2001 |
|
|
} |
2002 |
|
|
} |
2003 |
|
|
if (ex != null || c == null) { |
2004 |
|
|
if (ex == null) |
2005 |
|
|
ex = new NullPointerException(); |
2006 |
|
|
} |
2007 |
dl |
1.18 |
else { |
2008 |
|
|
ThenCopy<U> d = null; |
2009 |
|
|
Object s; |
2010 |
|
|
if ((s = c.result) == null) { |
2011 |
|
|
CompletionNode p = new CompletionNode |
2012 |
|
|
(d = new ThenCopy<U>(c, dst)); |
2013 |
|
|
while ((s = c.result) == null) { |
2014 |
|
|
if (UNSAFE.compareAndSwapObject |
2015 |
|
|
(c, COMPLETIONS, p.next = c.completions, p)) |
2016 |
|
|
break; |
2017 |
|
|
} |
2018 |
dl |
1.17 |
} |
2019 |
dl |
1.18 |
if (s != null && (d == null || d.compareAndSet(0, 1))) { |
2020 |
|
|
U u; |
2021 |
|
|
if (s instanceof AltResult) { |
2022 |
|
|
ex = ((AltResult)s).ex; // no rewrap |
2023 |
|
|
u = null; |
2024 |
|
|
} |
2025 |
|
|
else |
2026 |
|
|
u = (U) s; |
2027 |
|
|
if (ex == null) |
2028 |
|
|
dst.complete(u); |
2029 |
dl |
1.17 |
} |
2030 |
|
|
} |
2031 |
dl |
1.18 |
if (ex != null) |
2032 |
dl |
1.19 |
dst.propagateException(ex); |
2033 |
|
|
else if (c != null && c.result != null) |
2034 |
dl |
1.18 |
c.postComplete(); |
2035 |
dl |
1.17 |
} |
2036 |
|
|
} |
2037 |
|
|
} |
2038 |
|
|
|
2039 |
dl |
1.1 |
/* ------------- then/and/or implementations -------------- */ |
2040 |
|
|
|
2041 |
|
|
private <U> CompletableFuture<U> thenFunction(Function<? super T,? extends U> fn, |
2042 |
|
|
Executor executor) { |
2043 |
|
|
if (fn == null) throw new NullPointerException(); |
2044 |
|
|
CompletableFuture<U> dst = new CompletableFuture<U>(); |
2045 |
|
|
ThenFunction<T,U> d = null; |
2046 |
jsr166 |
1.2 |
Object r; |
2047 |
|
|
if ((r = result) == null) { |
2048 |
dl |
1.1 |
CompletionNode p = new CompletionNode |
2049 |
|
|
(d = new ThenFunction<T,U>(this, fn, dst, executor)); |
2050 |
|
|
while ((r = result) == null) { |
2051 |
|
|
if (UNSAFE.compareAndSwapObject |
2052 |
|
|
(this, COMPLETIONS, p.next = completions, p)) |
2053 |
|
|
break; |
2054 |
|
|
} |
2055 |
|
|
} |
2056 |
jsr166 |
1.2 |
if (r != null && (d == null || d.compareAndSet(0, 1))) { |
2057 |
dl |
1.19 |
T t; Throwable ex; |
2058 |
jsr166 |
1.2 |
if (r instanceof AltResult) { |
2059 |
dl |
1.19 |
ex = ((AltResult)r).ex; |
2060 |
jsr166 |
1.2 |
t = null; |
2061 |
dl |
1.1 |
} |
2062 |
dl |
1.19 |
else { |
2063 |
|
|
ex = null; |
2064 |
jsr166 |
1.2 |
t = (T) r; |
2065 |
dl |
1.19 |
} |
2066 |
jsr166 |
1.2 |
if (ex == null) { |
2067 |
dl |
1.1 |
try { |
2068 |
|
|
if (executor != null) |
2069 |
dl |
1.7 |
executor.execute(new AsyncFunction<T,U>(t, fn, dst)); |
2070 |
dl |
1.1 |
else |
2071 |
|
|
dst.complete(fn.apply(t)); |
2072 |
|
|
} catch (Throwable rex) { |
2073 |
dl |
1.19 |
ex = rex; |
2074 |
dl |
1.1 |
} |
2075 |
|
|
} |
2076 |
dl |
1.19 |
if (ex != null) |
2077 |
|
|
dst.propagateException(ex); |
2078 |
dl |
1.17 |
} |
2079 |
|
|
if (r != null || result != null) |
2080 |
jsr166 |
1.2 |
postComplete(); |
2081 |
dl |
1.1 |
return dst; |
2082 |
|
|
} |
2083 |
|
|
|
2084 |
dl |
1.7 |
private CompletableFuture<Void> thenBlock(Block<? super T> fn, |
2085 |
|
|
Executor executor) { |
2086 |
|
|
if (fn == null) throw new NullPointerException(); |
2087 |
|
|
CompletableFuture<Void> dst = new CompletableFuture<Void>(); |
2088 |
|
|
ThenBlock<T> d = null; |
2089 |
|
|
Object r; |
2090 |
|
|
if ((r = result) == null) { |
2091 |
|
|
CompletionNode p = new CompletionNode |
2092 |
|
|
(d = new ThenBlock<T>(this, fn, dst, executor)); |
2093 |
|
|
while ((r = result) == null) { |
2094 |
|
|
if (UNSAFE.compareAndSwapObject |
2095 |
|
|
(this, COMPLETIONS, p.next = completions, p)) |
2096 |
|
|
break; |
2097 |
|
|
} |
2098 |
|
|
} |
2099 |
|
|
if (r != null && (d == null || d.compareAndSet(0, 1))) { |
2100 |
dl |
1.19 |
T t; Throwable ex; |
2101 |
dl |
1.7 |
if (r instanceof AltResult) { |
2102 |
dl |
1.19 |
ex = ((AltResult)r).ex; |
2103 |
dl |
1.7 |
t = null; |
2104 |
|
|
} |
2105 |
dl |
1.19 |
else { |
2106 |
|
|
ex = null; |
2107 |
dl |
1.7 |
t = (T) r; |
2108 |
dl |
1.19 |
} |
2109 |
dl |
1.7 |
if (ex == null) { |
2110 |
|
|
try { |
2111 |
|
|
if (executor != null) |
2112 |
|
|
executor.execute(new AsyncBlock<T>(t, fn, dst)); |
2113 |
|
|
else { |
2114 |
|
|
fn.accept(t); |
2115 |
|
|
dst.complete(null); |
2116 |
|
|
} |
2117 |
|
|
} catch (Throwable rex) { |
2118 |
dl |
1.19 |
ex = rex; |
2119 |
dl |
1.7 |
} |
2120 |
|
|
} |
2121 |
dl |
1.19 |
if (ex != null) |
2122 |
|
|
dst.propagateException(ex); |
2123 |
dl |
1.17 |
} |
2124 |
|
|
if (r != null || result != null) |
2125 |
dl |
1.7 |
postComplete(); |
2126 |
|
|
return dst; |
2127 |
|
|
} |
2128 |
|
|
|
2129 |
jsr166 |
1.2 |
private CompletableFuture<Void> thenRunnable(Runnable action, |
2130 |
dl |
1.1 |
Executor executor) { |
2131 |
|
|
if (action == null) throw new NullPointerException(); |
2132 |
|
|
CompletableFuture<Void> dst = new CompletableFuture<Void>(); |
2133 |
|
|
ThenRunnable<T> d = null; |
2134 |
jsr166 |
1.2 |
Object r; |
2135 |
|
|
if ((r = result) == null) { |
2136 |
dl |
1.1 |
CompletionNode p = new CompletionNode |
2137 |
|
|
(d = new ThenRunnable<T>(this, action, dst, executor)); |
2138 |
|
|
while ((r = result) == null) { |
2139 |
|
|
if (UNSAFE.compareAndSwapObject |
2140 |
|
|
(this, COMPLETIONS, p.next = completions, p)) |
2141 |
|
|
break; |
2142 |
|
|
} |
2143 |
|
|
} |
2144 |
jsr166 |
1.2 |
if (r != null && (d == null || d.compareAndSet(0, 1))) { |
2145 |
dl |
1.19 |
Throwable ex; |
2146 |
|
|
if (r instanceof AltResult) |
2147 |
|
|
ex = ((AltResult)r).ex; |
2148 |
|
|
else |
2149 |
|
|
ex = null; |
2150 |
jsr166 |
1.2 |
if (ex == null) { |
2151 |
dl |
1.1 |
try { |
2152 |
|
|
if (executor != null) |
2153 |
|
|
executor.execute(new AsyncRunnable(action, dst)); |
2154 |
|
|
else { |
2155 |
|
|
action.run(); |
2156 |
|
|
dst.complete(null); |
2157 |
|
|
} |
2158 |
|
|
} catch (Throwable rex) { |
2159 |
dl |
1.19 |
ex = rex; |
2160 |
dl |
1.1 |
} |
2161 |
|
|
} |
2162 |
dl |
1.19 |
if (ex != null) |
2163 |
|
|
dst.propagateException(ex); |
2164 |
dl |
1.17 |
} |
2165 |
|
|
if (r != null || result != null) |
2166 |
jsr166 |
1.2 |
postComplete(); |
2167 |
dl |
1.1 |
return dst; |
2168 |
|
|
} |
2169 |
|
|
|
2170 |
|
|
private <U,V> CompletableFuture<V> andFunction(CompletableFuture<? extends U> other, |
2171 |
|
|
BiFunction<? super T,? super U,? extends V> fn, |
2172 |
|
|
Executor executor) { |
2173 |
|
|
if (other == null || fn == null) throw new NullPointerException(); |
2174 |
jsr166 |
1.2 |
CompletableFuture<V> dst = new CompletableFuture<V>(); |
2175 |
|
|
AndFunction<T,U,V> d = null; |
2176 |
|
|
Object r, s = null; |
2177 |
|
|
if ((r = result) == null || (s = other.result) == null) { |
2178 |
dl |
1.1 |
d = new AndFunction<T,U,V>(this, other, fn, dst, executor); |
2179 |
|
|
CompletionNode q = null, p = new CompletionNode(d); |
2180 |
|
|
while ((r == null && (r = result) == null) || |
2181 |
|
|
(s == null && (s = other.result) == null)) { |
2182 |
|
|
if (q != null) { |
2183 |
|
|
if (s != null || |
2184 |
|
|
UNSAFE.compareAndSwapObject |
2185 |
|
|
(other, COMPLETIONS, q.next = other.completions, q)) |
2186 |
|
|
break; |
2187 |
|
|
} |
2188 |
|
|
else if (r != null || |
2189 |
|
|
UNSAFE.compareAndSwapObject |
2190 |
|
|
(this, COMPLETIONS, p.next = completions, p)) { |
2191 |
|
|
if (s != null) |
2192 |
|
|
break; |
2193 |
|
|
q = new CompletionNode(d); |
2194 |
|
|
} |
2195 |
|
|
} |
2196 |
|
|
} |
2197 |
jsr166 |
1.2 |
if (r != null && s != null && (d == null || d.compareAndSet(0, 1))) { |
2198 |
dl |
1.19 |
T t; U u; Throwable ex; |
2199 |
jsr166 |
1.2 |
if (r instanceof AltResult) { |
2200 |
dl |
1.19 |
ex = ((AltResult)r).ex; |
2201 |
jsr166 |
1.2 |
t = null; |
2202 |
dl |
1.1 |
} |
2203 |
dl |
1.19 |
else { |
2204 |
|
|
ex = null; |
2205 |
jsr166 |
1.2 |
t = (T) r; |
2206 |
dl |
1.19 |
} |
2207 |
dl |
1.1 |
if (ex != null) |
2208 |
|
|
u = null; |
2209 |
|
|
else if (s instanceof AltResult) { |
2210 |
dl |
1.19 |
ex = ((AltResult)s).ex; |
2211 |
dl |
1.1 |
u = null; |
2212 |
|
|
} |
2213 |
|
|
else |
2214 |
jsr166 |
1.2 |
u = (U) s; |
2215 |
|
|
if (ex == null) { |
2216 |
dl |
1.1 |
try { |
2217 |
|
|
if (executor != null) |
2218 |
|
|
executor.execute(new AsyncBiFunction<T,U,V>(t, u, fn, dst)); |
2219 |
|
|
else |
2220 |
|
|
dst.complete(fn.apply(t, u)); |
2221 |
|
|
} catch (Throwable rex) { |
2222 |
dl |
1.19 |
ex = rex; |
2223 |
dl |
1.1 |
} |
2224 |
|
|
} |
2225 |
dl |
1.19 |
if (ex != null) |
2226 |
|
|
dst.propagateException(ex); |
2227 |
jsr166 |
1.2 |
} |
2228 |
dl |
1.17 |
if (r != null || result != null) |
2229 |
dl |
1.1 |
postComplete(); |
2230 |
dl |
1.17 |
if (s != null || other.result != null) |
2231 |
dl |
1.1 |
other.postComplete(); |
2232 |
jsr166 |
1.2 |
return dst; |
2233 |
dl |
1.1 |
} |
2234 |
|
|
|
2235 |
dl |
1.7 |
private <U> CompletableFuture<Void> andBlock(CompletableFuture<? extends U> other, |
2236 |
|
|
BiBlock<? super T,? super U> fn, |
2237 |
|
|
Executor executor) { |
2238 |
|
|
if (other == null || fn == null) throw new NullPointerException(); |
2239 |
|
|
CompletableFuture<Void> dst = new CompletableFuture<Void>(); |
2240 |
|
|
AndBlock<T,U> d = null; |
2241 |
|
|
Object r, s = null; |
2242 |
|
|
if ((r = result) == null || (s = other.result) == null) { |
2243 |
|
|
d = new AndBlock<T,U>(this, other, fn, dst, executor); |
2244 |
|
|
CompletionNode q = null, p = new CompletionNode(d); |
2245 |
|
|
while ((r == null && (r = result) == null) || |
2246 |
|
|
(s == null && (s = other.result) == null)) { |
2247 |
|
|
if (q != null) { |
2248 |
|
|
if (s != null || |
2249 |
|
|
UNSAFE.compareAndSwapObject |
2250 |
|
|
(other, COMPLETIONS, q.next = other.completions, q)) |
2251 |
|
|
break; |
2252 |
|
|
} |
2253 |
|
|
else if (r != null || |
2254 |
|
|
UNSAFE.compareAndSwapObject |
2255 |
|
|
(this, COMPLETIONS, p.next = completions, p)) { |
2256 |
|
|
if (s != null) |
2257 |
|
|
break; |
2258 |
|
|
q = new CompletionNode(d); |
2259 |
|
|
} |
2260 |
|
|
} |
2261 |
|
|
} |
2262 |
|
|
if (r != null && s != null && (d == null || d.compareAndSet(0, 1))) { |
2263 |
dl |
1.19 |
T t; U u; Throwable ex; |
2264 |
dl |
1.7 |
if (r instanceof AltResult) { |
2265 |
dl |
1.19 |
ex = ((AltResult)r).ex; |
2266 |
dl |
1.7 |
t = null; |
2267 |
|
|
} |
2268 |
dl |
1.19 |
else { |
2269 |
|
|
ex = null; |
2270 |
dl |
1.7 |
t = (T) r; |
2271 |
dl |
1.19 |
} |
2272 |
dl |
1.7 |
if (ex != null) |
2273 |
|
|
u = null; |
2274 |
|
|
else if (s instanceof AltResult) { |
2275 |
dl |
1.19 |
ex = ((AltResult)s).ex; |
2276 |
dl |
1.7 |
u = null; |
2277 |
|
|
} |
2278 |
|
|
else |
2279 |
|
|
u = (U) s; |
2280 |
|
|
if (ex == null) { |
2281 |
|
|
try { |
2282 |
|
|
if (executor != null) |
2283 |
|
|
executor.execute(new AsyncBiBlock<T,U>(t, u, fn, dst)); |
2284 |
|
|
else { |
2285 |
|
|
fn.accept(t, u); |
2286 |
|
|
dst.complete(null); |
2287 |
|
|
} |
2288 |
|
|
} catch (Throwable rex) { |
2289 |
dl |
1.19 |
ex = rex; |
2290 |
dl |
1.7 |
} |
2291 |
|
|
} |
2292 |
dl |
1.19 |
if (ex != null) |
2293 |
|
|
dst.propagateException(ex); |
2294 |
dl |
1.7 |
} |
2295 |
dl |
1.17 |
if (r != null || result != null) |
2296 |
dl |
1.7 |
postComplete(); |
2297 |
dl |
1.17 |
if (s != null || other.result != null) |
2298 |
dl |
1.7 |
other.postComplete(); |
2299 |
|
|
return dst; |
2300 |
|
|
} |
2301 |
|
|
|
2302 |
dl |
1.1 |
private CompletableFuture<Void> andRunnable(CompletableFuture<?> other, |
2303 |
|
|
Runnable action, |
2304 |
|
|
Executor executor) { |
2305 |
|
|
if (other == null || action == null) throw new NullPointerException(); |
2306 |
jsr166 |
1.2 |
CompletableFuture<Void> dst = new CompletableFuture<Void>(); |
2307 |
|
|
AndRunnable<T> d = null; |
2308 |
|
|
Object r, s = null; |
2309 |
|
|
if ((r = result) == null || (s = other.result) == null) { |
2310 |
dl |
1.1 |
d = new AndRunnable<T>(this, other, action, dst, executor); |
2311 |
|
|
CompletionNode q = null, p = new CompletionNode(d); |
2312 |
|
|
while ((r == null && (r = result) == null) || |
2313 |
|
|
(s == null && (s = other.result) == null)) { |
2314 |
|
|
if (q != null) { |
2315 |
|
|
if (s != null || |
2316 |
|
|
UNSAFE.compareAndSwapObject |
2317 |
|
|
(other, COMPLETIONS, q.next = other.completions, q)) |
2318 |
|
|
break; |
2319 |
|
|
} |
2320 |
|
|
else if (r != null || |
2321 |
|
|
UNSAFE.compareAndSwapObject |
2322 |
|
|
(this, COMPLETIONS, p.next = completions, p)) { |
2323 |
|
|
if (s != null) |
2324 |
|
|
break; |
2325 |
|
|
q = new CompletionNode(d); |
2326 |
|
|
} |
2327 |
|
|
} |
2328 |
|
|
} |
2329 |
jsr166 |
1.2 |
if (r != null && s != null && (d == null || d.compareAndSet(0, 1))) { |
2330 |
dl |
1.19 |
Throwable ex; |
2331 |
|
|
if (r instanceof AltResult) |
2332 |
|
|
ex = ((AltResult)r).ex; |
2333 |
|
|
else |
2334 |
|
|
ex = null; |
2335 |
|
|
if (ex == null && (s instanceof AltResult)) |
2336 |
|
|
ex = ((AltResult)s).ex; |
2337 |
|
|
if (ex == null) { |
2338 |
dl |
1.1 |
try { |
2339 |
|
|
if (executor != null) |
2340 |
|
|
executor.execute(new AsyncRunnable(action, dst)); |
2341 |
|
|
else { |
2342 |
|
|
action.run(); |
2343 |
|
|
dst.complete(null); |
2344 |
|
|
} |
2345 |
|
|
} catch (Throwable rex) { |
2346 |
dl |
1.19 |
ex = rex; |
2347 |
dl |
1.1 |
} |
2348 |
|
|
} |
2349 |
dl |
1.19 |
if (ex != null) |
2350 |
|
|
dst.propagateException(ex); |
2351 |
jsr166 |
1.2 |
} |
2352 |
dl |
1.17 |
if (r != null || result != null) |
2353 |
dl |
1.1 |
postComplete(); |
2354 |
dl |
1.17 |
if (s != null || other.result != null) |
2355 |
dl |
1.1 |
other.postComplete(); |
2356 |
jsr166 |
1.2 |
return dst; |
2357 |
dl |
1.1 |
} |
2358 |
|
|
|
2359 |
|
|
private <U> CompletableFuture<U> orFunction(CompletableFuture<? extends T> other, |
2360 |
|
|
Function<? super T, U> fn, |
2361 |
|
|
Executor executor) { |
2362 |
|
|
if (other == null || fn == null) throw new NullPointerException(); |
2363 |
jsr166 |
1.2 |
CompletableFuture<U> dst = new CompletableFuture<U>(); |
2364 |
|
|
OrFunction<T,U> d = null; |
2365 |
|
|
Object r; |
2366 |
|
|
if ((r = result) == null && (r = other.result) == null) { |
2367 |
dl |
1.1 |
d = new OrFunction<T,U>(this, other, fn, dst, executor); |
2368 |
|
|
CompletionNode q = null, p = new CompletionNode(d); |
2369 |
|
|
while ((r = result) == null && (r = other.result) == null) { |
2370 |
|
|
if (q != null) { |
2371 |
|
|
if (UNSAFE.compareAndSwapObject |
2372 |
|
|
(other, COMPLETIONS, q.next = other.completions, q)) |
2373 |
|
|
break; |
2374 |
|
|
} |
2375 |
|
|
else if (UNSAFE.compareAndSwapObject |
2376 |
|
|
(this, COMPLETIONS, p.next = completions, p)) |
2377 |
|
|
q = new CompletionNode(d); |
2378 |
|
|
} |
2379 |
jsr166 |
1.2 |
} |
2380 |
|
|
if (r != null && (d == null || d.compareAndSet(0, 1))) { |
2381 |
dl |
1.19 |
T t; Throwable ex; |
2382 |
jsr166 |
1.2 |
if (r instanceof AltResult) { |
2383 |
dl |
1.19 |
ex = ((AltResult)r).ex; |
2384 |
jsr166 |
1.2 |
t = null; |
2385 |
dl |
1.1 |
} |
2386 |
dl |
1.19 |
else { |
2387 |
|
|
ex = null; |
2388 |
jsr166 |
1.2 |
t = (T) r; |
2389 |
dl |
1.19 |
} |
2390 |
jsr166 |
1.2 |
if (ex == null) { |
2391 |
dl |
1.1 |
try { |
2392 |
|
|
if (executor != null) |
2393 |
dl |
1.7 |
executor.execute(new AsyncFunction<T,U>(t, fn, dst)); |
2394 |
dl |
1.1 |
else |
2395 |
|
|
dst.complete(fn.apply(t)); |
2396 |
|
|
} catch (Throwable rex) { |
2397 |
dl |
1.19 |
ex = rex; |
2398 |
dl |
1.1 |
} |
2399 |
|
|
} |
2400 |
dl |
1.19 |
if (ex != null) |
2401 |
|
|
dst.propagateException(ex); |
2402 |
jsr166 |
1.2 |
} |
2403 |
dl |
1.17 |
if (result != null) |
2404 |
|
|
postComplete(); |
2405 |
|
|
if (other.result != null) |
2406 |
|
|
other.postComplete(); |
2407 |
jsr166 |
1.2 |
return dst; |
2408 |
dl |
1.1 |
} |
2409 |
|
|
|
2410 |
dl |
1.7 |
private CompletableFuture<Void> orBlock(CompletableFuture<? extends T> other, |
2411 |
|
|
Block<? super T> fn, |
2412 |
|
|
Executor executor) { |
2413 |
|
|
if (other == null || fn == null) throw new NullPointerException(); |
2414 |
|
|
CompletableFuture<Void> dst = new CompletableFuture<Void>(); |
2415 |
|
|
OrBlock<T> d = null; |
2416 |
|
|
Object r; |
2417 |
|
|
if ((r = result) == null && (r = other.result) == null) { |
2418 |
|
|
d = new OrBlock<T>(this, other, fn, dst, executor); |
2419 |
|
|
CompletionNode q = null, p = new CompletionNode(d); |
2420 |
|
|
while ((r = result) == null && (r = other.result) == null) { |
2421 |
|
|
if (q != null) { |
2422 |
|
|
if (UNSAFE.compareAndSwapObject |
2423 |
|
|
(other, COMPLETIONS, q.next = other.completions, q)) |
2424 |
|
|
break; |
2425 |
|
|
} |
2426 |
|
|
else if (UNSAFE.compareAndSwapObject |
2427 |
|
|
(this, COMPLETIONS, p.next = completions, p)) |
2428 |
|
|
q = new CompletionNode(d); |
2429 |
|
|
} |
2430 |
|
|
} |
2431 |
|
|
if (r != null && (d == null || d.compareAndSet(0, 1))) { |
2432 |
dl |
1.19 |
T t; Throwable ex; |
2433 |
dl |
1.7 |
if (r instanceof AltResult) { |
2434 |
dl |
1.19 |
ex = ((AltResult)r).ex; |
2435 |
dl |
1.7 |
t = null; |
2436 |
|
|
} |
2437 |
dl |
1.19 |
else { |
2438 |
|
|
ex = null; |
2439 |
dl |
1.7 |
t = (T) r; |
2440 |
dl |
1.19 |
} |
2441 |
dl |
1.7 |
if (ex == null) { |
2442 |
|
|
try { |
2443 |
|
|
if (executor != null) |
2444 |
|
|
executor.execute(new AsyncBlock<T>(t, fn, dst)); |
2445 |
|
|
else { |
2446 |
|
|
fn.accept(t); |
2447 |
|
|
dst.complete(null); |
2448 |
|
|
} |
2449 |
|
|
} catch (Throwable rex) { |
2450 |
dl |
1.19 |
ex = rex; |
2451 |
dl |
1.7 |
} |
2452 |
|
|
} |
2453 |
dl |
1.19 |
if (ex != null) |
2454 |
|
|
dst.propagateException(ex); |
2455 |
dl |
1.7 |
} |
2456 |
dl |
1.17 |
if (result != null) |
2457 |
|
|
postComplete(); |
2458 |
|
|
if (other.result != null) |
2459 |
|
|
other.postComplete(); |
2460 |
dl |
1.7 |
return dst; |
2461 |
|
|
} |
2462 |
|
|
|
2463 |
dl |
1.1 |
private CompletableFuture<Void> orRunnable(CompletableFuture<?> other, |
2464 |
|
|
Runnable action, |
2465 |
|
|
Executor executor) { |
2466 |
|
|
if (other == null || action == null) throw new NullPointerException(); |
2467 |
jsr166 |
1.2 |
CompletableFuture<Void> dst = new CompletableFuture<Void>(); |
2468 |
|
|
OrRunnable<T> d = null; |
2469 |
|
|
Object r; |
2470 |
|
|
if ((r = result) == null && (r = other.result) == null) { |
2471 |
dl |
1.1 |
d = new OrRunnable<T>(this, other, action, dst, executor); |
2472 |
|
|
CompletionNode q = null, p = new CompletionNode(d); |
2473 |
|
|
while ((r = result) == null && (r = other.result) == null) { |
2474 |
|
|
if (q != null) { |
2475 |
|
|
if (UNSAFE.compareAndSwapObject |
2476 |
|
|
(other, COMPLETIONS, q.next = other.completions, q)) |
2477 |
|
|
break; |
2478 |
|
|
} |
2479 |
|
|
else if (UNSAFE.compareAndSwapObject |
2480 |
|
|
(this, COMPLETIONS, p.next = completions, p)) |
2481 |
|
|
q = new CompletionNode(d); |
2482 |
|
|
} |
2483 |
jsr166 |
1.2 |
} |
2484 |
|
|
if (r != null && (d == null || d.compareAndSet(0, 1))) { |
2485 |
dl |
1.19 |
Throwable ex; |
2486 |
|
|
if (r instanceof AltResult) |
2487 |
|
|
ex = ((AltResult)r).ex; |
2488 |
|
|
else |
2489 |
|
|
ex = null; |
2490 |
|
|
if (ex == null) { |
2491 |
dl |
1.1 |
try { |
2492 |
|
|
if (executor != null) |
2493 |
|
|
executor.execute(new AsyncRunnable(action, dst)); |
2494 |
|
|
else { |
2495 |
|
|
action.run(); |
2496 |
|
|
dst.complete(null); |
2497 |
|
|
} |
2498 |
|
|
} catch (Throwable rex) { |
2499 |
dl |
1.19 |
ex = rex; |
2500 |
dl |
1.1 |
} |
2501 |
|
|
} |
2502 |
dl |
1.19 |
if (ex != null) |
2503 |
|
|
dst.propagateException(ex); |
2504 |
jsr166 |
1.2 |
} |
2505 |
dl |
1.17 |
if (result != null) |
2506 |
|
|
postComplete(); |
2507 |
|
|
if (other.result != null) |
2508 |
|
|
other.postComplete(); |
2509 |
jsr166 |
1.2 |
return dst; |
2510 |
dl |
1.1 |
} |
2511 |
|
|
|
2512 |
|
|
// Unsafe mechanics |
2513 |
|
|
private static final sun.misc.Unsafe UNSAFE; |
2514 |
|
|
private static final long RESULT; |
2515 |
|
|
private static final long WAITERS; |
2516 |
|
|
private static final long COMPLETIONS; |
2517 |
|
|
static { |
2518 |
|
|
try { |
2519 |
|
|
UNSAFE = sun.misc.Unsafe.getUnsafe(); |
2520 |
|
|
Class<?> k = CompletableFuture.class; |
2521 |
|
|
RESULT = UNSAFE.objectFieldOffset |
2522 |
|
|
(k.getDeclaredField("result")); |
2523 |
|
|
WAITERS = UNSAFE.objectFieldOffset |
2524 |
|
|
(k.getDeclaredField("waiters")); |
2525 |
|
|
COMPLETIONS = UNSAFE.objectFieldOffset |
2526 |
|
|
(k.getDeclaredField("completions")); |
2527 |
|
|
} catch (Exception e) { |
2528 |
|
|
throw new Error(e); |
2529 |
|
|
} |
2530 |
|
|
} |
2531 |
|
|
|
2532 |
|
|
} |