com.alibaba.rocketmq.client.common.ThreadLocalIndex Maven / Gradle / Ivy
/**
* 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 com.alibaba.rocketmq.client.common;
import java.util.Random;
public class ThreadLocalIndex {
private final ThreadLocal threadLocalIndex = new ThreadLocal();
public ThreadLocalIndex(int value) {
}
public int getAndIncrement() {
Integer index = this.threadLocalIndex.get();
if (null == index) {
index = new Integer(Math.abs(new Random().nextInt()));
if (index < 0) index = 0;
this.threadLocalIndex.set(index);
}
index = Math.abs(index + 1);
if (index < 0)
index = 0;
this.threadLocalIndex.set(index);
return index;
}
@Override
public String toString() {
return "ThreadLocalIndex{" +
"threadLocalIndex=" + threadLocalIndex.get() +
'}';
}
}