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*/ |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import static java.util.concurrent.TimeUnit.NANOSECONDS; |
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import static java.util.concurrent.TimeUnit.SECONDS; |
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import java.util.ArrayList; |
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import java.util.concurrent.ScheduledThreadPoolExecutor; |
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import java.util.concurrent.ThreadFactory; |
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import java.util.concurrent.ThreadPoolExecutor; |
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import java.util.concurrent.atomic.AtomicBoolean; |
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import java.util.concurrent.atomic.AtomicInteger; |
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import java.util.concurrent.atomic.AtomicLong; |
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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} |
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|
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/** |
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< |
* scheduleAtFixedRate executes series of tasks at given rate |
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> |
* scheduleAtFixedRate executes series of tasks at given rate. |
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> |
* Eventually, it must hold that: |
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* cycles - 1 <= elapsedMillis/delay < cycles |
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*/ |
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public void testFixedRateSequence() throws InterruptedException { |
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final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1); |
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try (PoolCleaner cleaner = cleaner(p)) { |
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for (int delay = 1; delay <= LONG_DELAY_MS; delay *= 3) { |
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< |
long startTime = System.nanoTime(); |
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< |
int cycles = 10; |
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> |
final long startTime = System.nanoTime(); |
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> |
final int cycles = 8; |
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final CountDownLatch done = new CountDownLatch(cycles); |
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Runnable task = new CheckedRunnable() { |
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> |
final Runnable task = new CheckedRunnable() { |
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public void realRun() { done.countDown(); }}; |
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< |
ScheduledFuture periodicTask = |
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> |
final ScheduledFuture periodicTask = |
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p.scheduleAtFixedRate(task, 0, delay, MILLISECONDS); |
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< |
await(done); |
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> |
final int totalDelayMillis = (cycles - 1) * delay; |
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> |
await(done, totalDelayMillis + LONG_DELAY_MS); |
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periodicTask.cancel(true); |
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< |
double elapsedDelays = |
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< |
(double) millisElapsedSince(startTime) / delay; |
| 169 |
< |
if (elapsedDelays >= cycles - 1 && |
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< |
elapsedDelays <= cycles) |
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> |
final long elapsedMillis = millisElapsedSince(startTime); |
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> |
assertTrue(elapsedMillis >= totalDelayMillis); |
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> |
if (elapsedMillis <= cycles * delay) |
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return; |
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+ |
// else retry with longer delay |
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} |
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fail("unexpected execution rate"); |
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} |
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} |
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|
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/** |
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< |
* scheduleWithFixedDelay executes series of tasks with given period |
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> |
* scheduleWithFixedDelay executes series of tasks with given period. |
| 179 |
> |
* Eventually, it must hold that each task starts at least delay and at |
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> |
* most 2 * delay after the termination of the previous task. |
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*/ |
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public void testFixedDelaySequence() throws InterruptedException { |
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final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1); |
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try (PoolCleaner cleaner = cleaner(p)) { |
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for (int delay = 1; delay <= LONG_DELAY_MS; delay *= 3) { |
| 186 |
< |
long startTime = System.nanoTime(); |
| 187 |
< |
int cycles = 10; |
| 186 |
> |
final long startTime = System.nanoTime(); |
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> |
final AtomicLong previous = new AtomicLong(startTime); |
| 188 |
> |
final AtomicBoolean tryLongerDelay = new AtomicBoolean(false); |
| 189 |
> |
final int cycles = 8; |
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|
final CountDownLatch done = new CountDownLatch(cycles); |
| 191 |
< |
Runnable task = new CheckedRunnable() { |
| 192 |
< |
public void realRun() { done.countDown(); }}; |
| 193 |
< |
ScheduledFuture periodicTask = |
| 191 |
> |
final int d = delay; |
| 192 |
> |
final Runnable task = new CheckedRunnable() { |
| 193 |
> |
public void realRun() { |
| 194 |
> |
long now = System.nanoTime(); |
| 195 |
> |
long elapsedMillis |
| 196 |
> |
= NANOSECONDS.toMillis(now - previous.get()); |
| 197 |
> |
if (done.getCount() == cycles) { // first execution |
| 198 |
> |
if (elapsedMillis >= d) |
| 199 |
> |
tryLongerDelay.set(true); |
| 200 |
> |
} else { |
| 201 |
> |
assertTrue(elapsedMillis >= d); |
| 202 |
> |
if (elapsedMillis >= 2 * d) |
| 203 |
> |
tryLongerDelay.set(true); |
| 204 |
> |
} |
| 205 |
> |
previous.set(now); |
| 206 |
> |
done.countDown(); |
| 207 |
> |
}}; |
| 208 |
> |
final ScheduledFuture periodicTask = |
| 209 |
|
p.scheduleWithFixedDelay(task, 0, delay, MILLISECONDS); |
| 210 |
< |
await(done); |
| 210 |
> |
final int totalDelayMillis = (cycles - 1) * delay; |
| 211 |
> |
await(done, totalDelayMillis + cycles * LONG_DELAY_MS); |
| 212 |
|
periodicTask.cancel(true); |
| 213 |
< |
double elapsedDelays = |
| 214 |
< |
(double) millisElapsedSince(startTime) / delay; |
| 215 |
< |
if (elapsedDelays >= cycles - 1 && |
| 190 |
< |
elapsedDelays <= cycles) |
| 213 |
> |
final long elapsedMillis = millisElapsedSince(startTime); |
| 214 |
> |
assertTrue(elapsedMillis >= totalDelayMillis); |
| 215 |
> |
if (!tryLongerDelay.get()) |
| 216 |
|
return; |
| 217 |
+ |
// else retry with longer delay |
| 218 |
|
} |
| 219 |
|
fail("unexpected execution rate"); |
| 220 |
|
} |
