com.jdon.async.disruptor.ValueEventProcessor Maven / Gradle / Ivy
/*
* Copyright 2003-2009 the original author or authors.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package com.jdon.async.disruptor;
import com.lmax.disruptor.RingBuffer;
import com.lmax.disruptor.SequenceBarrier;
public class ValueEventProcessor {
protected RingBuffer ringBuffer;
private long waitAtSequence = 0;
public ValueEventProcessor(RingBuffer ringBuffer) {
this.ringBuffer = ringBuffer;
}
public void send(Object result) {
waitAtSequence = ringBuffer.next();
EventResultDisruptor ve = ringBuffer.get(waitAtSequence);
ve.setValue(result);
ringBuffer.publish(waitAtSequence);
}
public EventResultDisruptor waitFor() {
SequenceBarrier barrier = ringBuffer.newBarrier();
try {
long a = barrier.waitFor(waitAtSequence);
if (ringBuffer != null)
return ringBuffer.get(a);
} catch (Exception e) {
e.printStackTrace();
} finally {
barrier.alert();
}
return null;
}
/**
* not really block, the waiting time is longer than not block.
*/
public EventResultDisruptor waitForBlocking() {
SequenceBarrier barrier = ringBuffer.newBarrier();
try {
long a = barrier.waitFor(waitAtSequence);
if (ringBuffer != null)
return ringBuffer.get(a);
} catch (Exception e) {
e.printStackTrace();
} finally {
barrier.alert();
}
return null;
}
public long getWaitAtSequence() {
return waitAtSequence;
}
public void setWaitAtSequence(long waitAtSequence) {
this.waitAtSequence = waitAtSequence;
}
public void clear() {
this.ringBuffer = null;
}
}