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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.dubbo.common.threadpool;
import java.lang.instrument.Instrumentation;
import java.util.Collection;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.TimeUnit;
/**
* Can completely solve the OOM problem caused by {@link java.util.concurrent.LinkedBlockingQueue}.
*/
public class MemoryLimitedLinkedBlockingQueue extends LinkedBlockingQueue {
private static final long serialVersionUID = 1374792064759926198L;
private final MemoryLimiter memoryLimiter;
public MemoryLimitedLinkedBlockingQueue(Instrumentation inst) {
this(Integer.MAX_VALUE, inst);
}
public MemoryLimitedLinkedBlockingQueue(long memoryLimit, Instrumentation inst) {
super(Integer.MAX_VALUE);
this.memoryLimiter = new MemoryLimiter(memoryLimit, inst);
}
public MemoryLimitedLinkedBlockingQueue(Collection c, long memoryLimit, Instrumentation inst) {
super(c);
this.memoryLimiter = new MemoryLimiter(memoryLimit, inst);
}
public void setMemoryLimit(long memoryLimit) {
memoryLimiter.setMemoryLimit(memoryLimit);
}
public long getMemoryLimit() {
return memoryLimiter.getMemoryLimit();
}
public long getCurrentMemory() {
return memoryLimiter.getCurrentMemory();
}
public long getCurrentRemainMemory() {
return memoryLimiter.getCurrentRemainMemory();
}
@Override
public void put(E e) throws InterruptedException {
memoryLimiter.acquireInterruptibly(e);
super.put(e);
}
@Override
public boolean offer(E e, long timeout, TimeUnit unit) throws InterruptedException {
return memoryLimiter.acquire(e, timeout, unit) && super.offer(e, timeout, unit);
}
@Override
public boolean offer(E e) {
return memoryLimiter.acquire(e) && super.offer(e);
}
@Override
public E take() throws InterruptedException {
final E e = super.take();
memoryLimiter.releaseInterruptibly(e);
return e;
}
@Override
public E poll(long timeout, TimeUnit unit) throws InterruptedException {
final E e = super.poll(timeout, unit);
memoryLimiter.releaseInterruptibly(e, timeout, unit);
return e;
}
@Override
public E poll() {
final E e = super.poll();
memoryLimiter.release(e);
return e;
}
@Override
public boolean remove(Object o) {
final boolean success = super.remove(o);
if (success) {
memoryLimiter.release(o);
}
return success;
}
@Override
public void clear() {
super.clear();
memoryLimiter.clear();
}
}