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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.ThreadPoolExecutor; |
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import java.util.concurrent.TimeoutException; |
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import java.util.concurrent.TimeUnit; |
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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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< |
* 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 CustomExecutor p = new CustomExecutor(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; |
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< |
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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< |
* scheduleWithFixedDelay executes series of tasks with given period |
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> |
* scheduleWithFixedDelay executes series of tasks with given period. |
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> |
* 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 CustomExecutor p = new CustomExecutor(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 AtomicLong previous = new AtomicLong(startTime); |
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> |
final AtomicBoolean tryLongerDelay = new AtomicBoolean(false); |
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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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public void realRun() { done.countDown(); }}; |
| 249 |
< |
ScheduledFuture periodicTask = |
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> |
final int d = delay; |
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> |
final Runnable task = new CheckedRunnable() { |
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> |
public void realRun() { |
| 250 |
> |
long now = System.nanoTime(); |
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> |
long elapsedMillis |
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> |
= NANOSECONDS.toMillis(now - previous.get()); |
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> |
if (done.getCount() == cycles) { // first execution |
| 254 |
> |
if (elapsedMillis >= d) |
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> |
tryLongerDelay.set(true); |
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> |
} else { |
| 257 |
> |
assertTrue(elapsedMillis >= d); |
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> |
if (elapsedMillis >= 2 * d) |
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> |
tryLongerDelay.set(true); |
| 260 |
> |
} |
| 261 |
> |
previous.set(now); |
| 262 |
> |
done.countDown(); |
| 263 |
> |
}}; |
| 264 |
> |
final ScheduledFuture periodicTask = |
| 265 |
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p.scheduleWithFixedDelay(task, 0, delay, MILLISECONDS); |
| 266 |
< |
await(done); |
| 266 |
> |
final int totalDelayMillis = (cycles - 1) * delay; |
| 267 |
> |
await(done, totalDelayMillis + cycles * LONG_DELAY_MS); |
| 268 |
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periodicTask.cancel(true); |
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< |
double elapsedDelays = |
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(double) millisElapsedSince(startTime) / delay; |
| 271 |
< |
if (elapsedDelays >= cycles - 1 && |
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elapsedDelays <= cycles) |
| 269 |
> |
final long elapsedMillis = millisElapsedSince(startTime); |
| 270 |
> |
assertTrue(elapsedMillis >= totalDelayMillis); |
| 271 |
> |
if (!tryLongerDelay.get()) |
| 272 |
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return; |
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+ |
// else retry with longer delay |
| 274 |
|
} |
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|
fail("unexpected execution rate"); |
| 276 |
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} |
