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/* |
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* @(#)SingleThreadedExecutor.java |
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*/ |
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|
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package java.util.concurrent; |
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|
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import java.util.List; |
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|
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/** |
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* A {@link ThreadedExecutor} that runs tasks on a single background |
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* thread. Tasks are executed sequentially in the order they were |
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* submitted, with no more than one task executing at a time. |
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* Generally, the tasks will all execute in the same thread, but if |
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* this single thread terminates due to a failure during execution, a |
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* new thread will take its place if needed to execute subsequent |
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* tasks. |
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* |
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* @since 1.5 |
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* |
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* @spec JSR-166 |
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* @revised $Date: 2003/05/14 21:30:48 $ |
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* @editor $Author: tim $ |
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*/ |
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public class SingleThreadedExecutor implements ThreadedExecutor { |
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|
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private final ThreadedExecutor executor; |
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|
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/** |
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* Creates a threaded executor that uses a single thread operating |
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* off an unbounded queue. (Note however that if this single |
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* thread terminates due to a failure during execution prior to |
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* shutdown, a new one will take its place if needed to execute |
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* subsequent tasks.) Tasks are guaranteed to execute |
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* sequentially, and no more than one task will be active at any |
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* given time. |
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*/ |
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public SingleThreadedExecutor() { |
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executor = new ThreadPoolExecutor(1, 1, |
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0L, TimeUnit.MILLISECONDS, |
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new LinkedBlockingQueue()); |
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} |
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|
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/* Executor implementation. Inherit javadoc from ThreadedExecutor. */ |
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|
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public void execute(Runnable command) { |
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executor.execute(command); |
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} |
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|
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/* ThreadedExecutor implementation. Inherit javadoc. */ |
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|
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public void setThreadFactory(ThreadFactory threadFactory) { |
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executor.setThreadFactory(threadFactory); |
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} |
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|
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public ThreadFactory getThreadFactory() { |
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return executor.getThreadFactory(); |
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} |
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public void setCannotExecuteHandler(CannotExecuteHandler handler) { |
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executor.setCannotExecuteHandler(handler); |
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} |
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public CannotExecuteHandler getCannotExecuteHandler() { |
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return executor.getCannotExecuteHandler(); |
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} |
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|
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public BlockingQueue getQueue() { |
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return executor.getQueue(); |
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} |
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public void shutdown() { |
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executor.shutdown(); |
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} |
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public List shutdownNow() { |
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return executor.shutdownNow(); |
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} |
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|
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public boolean isShutdown() { |
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return executor.isShutdown(); |
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} |
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|
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public void interrupt() { |
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executor.interrupt(); |
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} |
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|
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public boolean isTerminated() { |
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return executor.isTerminated(); |
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} |
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public boolean awaitTermination(long timeout, TimeUnit granularity) |
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throws InterruptedException { |
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return executor.awaitTermination(timeout, granularity); |
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} |
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} |
