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Make it clear that HashedWheelTimer only support millis. (#8322)

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Motivation:

HWT does not support anything smaller then 1ms so we should make it clear that this is the case.

Modifications:

Log a warning if < 1ms is used.

Result:

Less suprising behaviour.
This commit is contained in:
Norman Maurer 2018-11-02 08:10:18 +01:00 committed by GitHub
parent 359390d04c
commit bde2865ef8
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 14 additions and 2 deletions
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16
common/src/main/java/io/netty/util/HashedWheelTimer.java
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@ -84,6 +84,7 @@ public class HashedWheelTimer implements Timer {
private static final AtomicInteger INSTANCE_COUNTER = new AtomicInteger();
private static final AtomicBoolean WARNED_TOO_MANY_INSTANCES = new AtomicBoolean();
private static final int INSTANCE_COUNT_LIMIT = 64;
private static final long MILLISECOND_NANOS = TimeUnit.MILLISECONDS.toNanos(1);
private static final ResourceLeakDetector<HashedWheelTimer> leakDetector = ResourceLeakDetectorFactory.instance()
.newResourceLeakDetector(HashedWheelTimer.class, 1);
@ -259,14 +260,25 @@ public class HashedWheelTimer implements Timer {
mask = wheel.length - 1;
// Convert tickDuration to nanos.
this.tickDuration = unit.toNanos(tickDuration);
long duration = unit.toNanos(tickDuration);
// Prevent overflow.
if (this.tickDuration >= Long.MAX_VALUE / wheel.length) {
if (duration >= Long.MAX_VALUE / wheel.length) {
throw new IllegalArgumentException(String.format(
"tickDuration: %d (expected: 0 < tickDuration in nanos < %d",
tickDuration, Long.MAX_VALUE / wheel.length));
}
if (duration < MILLISECOND_NANOS) {
if (logger.isWarnEnabled()) {
logger.warn("Configured tickDuration %d smaller then %d, using 1ms.",
tickDuration, MILLISECOND_NANOS);
}
this.tickDuration = MILLISECOND_NANOS;
} else {
this.tickDuration = duration;
}
workerThread = threadFactory.newThread(worker);
leak = leakDetection || !workerThread.isDaemon() ? leakDetector.track(this) : null;