com.feingto.iot.common.util.MessageId Maven / Gradle / Ivy

Go to download

package com.feingto.iot.common.util;

import java.util.concurrent.atomic.AtomicInteger;

/**
 * 生成消息ID
 *
 * @author longfei
 */
public class MessageId {
    private static AtomicInteger index = new AtomicInteger(1);

    public static int messageId() {
        for (; ; ) {
            int current = index.get();
            int next = (current >= Integer.MAX_VALUE ? 0 : current + 1);
            if (index.compareAndSet(current, next)) {
                return current;
            }
        }
    }
}