com.generallycloud.baseio.concurrent.BufferedArrayList Maven / Gradle / Ivy
/*
* Copyright 2015-2017 GenerallyCloud.com
*
* 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.generallycloud.baseio.concurrent;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.locks.ReentrantLock;
public class BufferedArrayList {
private ReentrantLock lock = new ReentrantLock();
private List list1 = new ArrayList();
private List list2 = new ArrayList();
private List buffer = list1;
public void offer(T t) {
ReentrantLock lock = this.lock;
lock.lock();
try {
buffer.add(t);
} finally {
lock.unlock();
}
}
public ReentrantLock getReentrantLock(){
return lock;
}
public List getBuffer(){
ReentrantLock lock = this.lock;
lock.lock();
try {
if (buffer == list1) {
buffer = list2;
buffer.clear();
return list1;
}else{
buffer = list1;
buffer.clear();
return list2;
}
} finally {
lock.unlock();
}
}
public int getBufferSize(){
return list1.size() + list2.size();
}
}