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Removed Timeout.extend() operation - a user can just create a new timeout

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This commit is contained in:
Trustin Lee 2009-02-02 03:42:05 +00:00
parent baea5f7a00
commit 60befc196f
3 changed files with 32 additions and 133 deletions
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157
src/main/java/org/jboss/netty/handler/timeout/HashedWheelTimer.java
View File

@ -183,7 +183,9 @@ public class HashedWheelTimer implements Timer {
return Collections.unmodifiableSet(unprocessedTimeouts);
}
public Timeout newTimeout(TimerTask task, long initialDelay, TimeUnit unit) {
public Timeout newTimeout(TimerTask task, long delay, TimeUnit unit) {
final long currentTime = System.nanoTime();
if (task == null) {
throw new NullPointerException("task");
}
@ -191,22 +193,34 @@ public class HashedWheelTimer implements Timer {
throw new NullPointerException("unit");
}
initialDelay = unit.toNanos(initialDelay);
checkDelay(initialDelay);
delay = unit.toNanos(delay);
checkDelay(delay);
if (!workerThread.isAlive()) {
start();
}
// Add the timeout to the wheel.
// Prepare the required parameters to create the timeout object.
HashedWheelTimeout timeout;
long currentTime = System.nanoTime();
final long lastRoundDelay = delay % roundDuration;
final long lastTickDelay = delay % tickDuration;
final long relativeIndex =
lastRoundDelay / tickDuration + (lastTickDelay != 0? 1 : 0);
final long deadline = currentTime + delay;
final long remainingRounds =
delay / roundDuration - (delay % roundDuration == 0? 1 : 0);
// Add the timeout to the wheel.
lock.readLock().lock();
try {
timeout = new HashedWheelTimeout(
task, wheelCursor, currentTime, initialDelay);
timeout =
new HashedWheelTimeout(
task, deadline,
(int) (wheelCursor + relativeIndex & mask),
remainingRounds);
wheel[schedule(timeout)].add(timeout);
wheel[timeout.stopIndex].add(timeout);
} finally {
lock.readLock().unlock();
}
@ -214,31 +228,6 @@ public class HashedWheelTimer implements Timer {
return timeout;
}
private int schedule(HashedWheelTimeout timeout) {
return schedule(timeout, timeout.initialDelay);
}
int schedule(HashedWheelTimeout timeout, final long additionalDelay) {
synchronized (timeout) {
final long oldCumulativeDelay = timeout.cumulativeDelay;
final long newCumulativeDelay = oldCumulativeDelay + additionalDelay;
final long lastRoundDelay = newCumulativeDelay % roundDuration;
final long lastTickDelay = newCumulativeDelay % tickDuration;
final long relativeIndex =
lastRoundDelay / tickDuration + (lastTickDelay != 0? 1 : 0);
timeout.deadline = timeout.startTime + newCumulativeDelay;
timeout.cumulativeDelay = newCumulativeDelay;
timeout.remainingRounds =
additionalDelay / roundDuration -
(additionalDelay % roundDuration == 0? 1:0) - timeout.slippedRounds;
timeout.slippedRounds = 0;
return timeout.stopIndex = (int) (timeout.startIndex + relativeIndex & mask);
}
}
boolean isWheelEmpty() {
for (Set<HashedWheelTimeout> bucket: wheel) {
if (!bucket.isEmpty()) {
@ -314,7 +303,6 @@ public class HashedWheelTimer implements Timer {
} else {
// A rare case where a timeout is put for the next
// round: just wait for the next round.
timeout.slippedRounds ++;
}
} else {
timeout.remainingRounds --;
@ -366,27 +354,17 @@ public class HashedWheelTimer implements Timer {
private final class HashedWheelTimeout implements Timeout {
private final TimerTask task;
final int startIndex;
int stopIndex;
final long startTime;
volatile long deadline;
final long initialDelay;
long cumulativeDelay;
long remainingRounds;
long slippedRounds;
private volatile int extensionCount;
final int stopIndex;
final long deadline;
volatile long remainingRounds;
private volatile boolean cancelled;
HashedWheelTimeout(TimerTask task, int startIndex, long startTime, long initialDelay) {
HashedWheelTimeout(
TimerTask task, long deadline, int stopIndex, long remainingRounds) {
this.task = task;
this.startIndex = startIndex;
this.startTime = startTime;
this.initialDelay = initialDelay;
this.deadline = deadline;
this.stopIndex = stopIndex;
this.remainingRounds = remainingRounds;
}
public TimerTask getTask() {
@ -401,53 +379,7 @@ public class HashedWheelTimer implements Timer {
cancelled = true;
// Might be called more than once, but doesn't matter.
synchronized (this) {
wheel[stopIndex].remove(this);
}
}
public void extend() {
extend(initialDelay);
}
public void extend(long additionalDelay, TimeUnit unit) {
extend(unit.toNanos(additionalDelay));
}
private void extend(long additionalDelay) {
checkDelay(additionalDelay);
if (cancelled) {
throw new IllegalStateException("cancelled");
}
lock.readLock().lock();
try {
// Reinsert the timeout to the appropriate bucket.
int oldStopIndex;
int newStopIndex;
synchronized (this) {
oldStopIndex = stopIndex;
stopIndex = newStopIndex = schedule(this, additionalDelay);
}
// Remove the timeout from the old bucket if necessary.
// If this method is called from the worker thread, it means
// this timeout has been removed from the bucket already.
if (oldStopIndex != newStopIndex &&
Thread.currentThread() != workerThread) {
wheel[oldStopIndex].remove(this);
}
// And add to the new bucket. If added already, that's fine.
wheel[newStopIndex].add(this);
} finally {
extensionCount ++;
lock.readLock().unlock();
}
}
public int getExtensionCount() {
return extensionCount;
wheel[stopIndex].remove(this);
}
public boolean isCancelled() {
@ -475,25 +407,12 @@ public class HashedWheelTimer implements Timer {
@Override
public String toString() {
long currentTime = System.nanoTime();
long age = currentTime - startTime;
long remaining = deadline - currentTime;
StringBuilder buf = new StringBuilder(192);
buf.append(getClass().getSimpleName());
buf.append('(');
buf.append("initialDelay: ");
buf.append(initialDelay / 1000000);
buf.append(" ms, ");
buf.append("cumulativeDelay: ");
buf.append(cumulativeDelay / 1000000);
buf.append(" ms, ");
buf.append("started: ");
buf.append(age / 1000000);
buf.append(" ms ago, ");
buf.append("deadline: ");
if (remaining > 0) {
buf.append(remaining / 1000000);
@ -505,20 +424,6 @@ public class HashedWheelTimer implements Timer {
buf.append("now, ");
}
buf.append("extended: ");
switch (getExtensionCount()) {
case 0:
buf.append("never");
break;
case 1:
buf.append("once");
break;
default:
buf.append(getExtensionCount());
buf.append(" times");
break;
}
if (isCancelled()) {
buf.append (", cancelled");
}

6
src/main/java/org/jboss/netty/handler/timeout/Timeout.java
View File

@ -22,8 +22,6 @@
*/
package org.jboss.netty.handler.timeout;
import java.util.concurrent.TimeUnit;
/**
* @author The Netty Project (netty-dev@lists.jboss.org)
* @author Trustin Lee (tlee@redhat.com)
@ -34,9 +32,5 @@ public interface Timeout {
boolean isExpired();
boolean isCancelled();
int getExtensionCount();
void extend();
void extend(long extensionTime, TimeUnit unit);
void cancel();
}

2
src/main/java/org/jboss/netty/handler/timeout/Timer.java
View File

@ -31,6 +31,6 @@ import java.util.concurrent.TimeUnit;
* @version $Rev$, $Date$
*/
public interface Timer {
Timeout newTimeout(TimerTask task, long timeout, TimeUnit unit);
Timeout newTimeout(TimerTask task, long delay, TimeUnit unit);
Set<Timeout> stop();
}