com.hazelcast.util.NoneStrictObjectPool Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2013, Hazelcast, Inc. All Rights Reserved.
*
* 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.hazelcast.util;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.atomic.AtomicInteger;
public abstract class NoneStrictObjectPool {
private final ConcurrentLinkedQueue queue = new ConcurrentLinkedQueue();
private final AtomicInteger size = new AtomicInteger();
private final int maxSize;
public NoneStrictObjectPool(int maxSize) {
this.maxSize = maxSize;
}
public boolean release(T t) {
onRelease(t);
if (size.get() < maxSize) {
queue.offer(t);
size.incrementAndGet();
return true;
}
return false;
}
public T obtain() {
T t = queue.poll();
if (t == null) {
t = createNew();
} else {
size.decrementAndGet();
onObtain(t);
}
return t;
}
public abstract T createNew();
public abstract void onRelease(T t);
public abstract void onObtain(T t);
public void clear() {
queue.clear();
}
}