package com.test;

import static org.junit.Assert.assertEquals;

import static org.junit.Assert.assertNull;

import java.util.concurrent.ConcurrentHashMap;

import org.junit.Test;

public class BeanTest {

private static final ConcurrentHashMap<String, Boolean> processing=new ConcurrentHashMap<String, Boolean>();

@Test

public void testputIfAbsent() {

Boolean isProcessing=processing.putIfAbsent("k1", Boolean.TRUE);// 为发减少数据层的并发，增加等待机制。

assertNull(isProcessing);

System.out.println("isProcessing1==" + isProcessing);

isProcessing=processing.putIfAbsent("k1", Boolean.TRUE);// 为发减少数据层的并发，增加等待机制。

System.out.println("isProcessing2==" + isProcessing);

assertEquals(isProcessing, Boolean.TRUE);

}

}