java工程引入redisson客户端实现基于redis的分布式锁

jar

redisson-all-3.10.5.jar

RedissonConfig

package com.app.util.redisson;

import org.redisson.Redisson;
import org.redisson.api.RedissonClient;
import org.redisson.config.Config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import com.app.common.utils.PropertiesUtil;
import com.app.solr.util.SolrSingleFactory;
/**
 * @ClassName:  RedissonConfig   
 * @Description:TODO(双端检索单例工厂模式--》创建 redissonClient 交由 spring IOC管理)   
 * @author: wd
 * @date:  2020年11月2日  下午5:52:27
 */
@Configuration
public class RedissonConfig {
	private static RedissonClient redissonClient;
	private static final String host=PropertiesUtil.getPropertiesVal("/redis.properties", "redis.host");
	private static final String port=PropertiesUtil.getPropertiesVal("/redis.properties", "redis.port");
	private static final String password=PropertiesUtil.getPropertiesVal("/redis.properties", "redis.pass");
	private static final String database=PropertiesUtil.getPropertiesVal("/redis.properties", "redis.database");
	private static final String timeout=PropertiesUtil.getPropertiesVal("/redis.properties", "cachePool.timeout");
	
	@Bean
	public static RedissonClient getRedisson() {
		if (redissonClient == null) {
			synchronized (RedissonConfig.class) {
				if (redissonClient == null) {
					redissonClient=getAndSetRedisson();
				}
			}
		}
		return redissonClient;
	}
	
	public static RedissonClient getAndSetRedisson() {
		
		try {
			System.out.println("获取redissonClient......");
			if (redissonClient == null) {
				System.out.println("redissonClient为空,创建中......");
				synchronized (SolrSingleFactory.class) {
					if (redissonClient == null) {
						Config config = new Config();
						config.useSingleServer().setAddress("redis://"+host+":"+port)
												.setPassword(password)
//												.setConnectionPoolSize(64)//连接池最大连接数，默认 64
//								                .setConnectionMinimumIdleSize(10)//最小空闲连接数，默认10
								                .setConnectTimeout(5000) //默认值：10000 同节点建立连接时的等待超时。时间单位是毫秒
								                .setTimeout(3000) //默认值：3000 等待节点回复命令的时间。该时间从命令发送成功时开始计时
								                .setDatabase(Integer.valueOf(database));
						redissonClient = Redisson.create(config);
						System.out.println("redissonClient,创建成功......");
					}
				}
			}
		} catch (Exception e) {
			System.out.println("redissonClient,创建异常......");
			e.printStackTrace();
		}
		return redissonClient;
	}

}

RedissonUtils.java

package com.app.util.redisson;

import java.util.concurrent.TimeUnit;

import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
/**
 * @ClassName:  RedissonUtils   
 * @Description:TODO(redisson工具类)   
 * @author: wd
 * @date:  2020年11月3日  上午11:22:33
 */
@Component
public class RedissonUtils {
	@Autowired
	private RedissonClient redissonClient;

	/**
	  * @Title: getLock
	  * @Description: TODO(获取分布式锁)
	  * @param key
	  * @return RLock 
	  * @date 2020年11月3日 上午11:06:59
	 */
	public RLock getLock(String key) {
		RLock fairLock=null;
		try {
			fairLock = redissonClient.getLock(key);
			//等待60秒，获取锁后会在10后释放锁
			fairLock.tryLock(60,10,TimeUnit.SECONDS);
		} catch (Exception e) {
			System.out.println("distribute lock key: " +key +" ,获取锁异常");
			e.printStackTrace();
		}finally {
			return fairLock;
		}
	}
	
	/**
	  * @Title: unLock
	  * @Description: TODO(释放锁)
	  * @param rLock
	  * @return void 
	  * @date 2020年11月3日 上午11:07:23
	 */
	public void unLock(RLock rLock) {
		try {
			if (rLock != null) {
				rLock.unlock();
			} else {
				System.out.println("distribute lock 不存在");
			} 
		} catch (Exception e) {
			System.out.println("distribute lock key: " + rLock.getName() + " ,释放锁异常");
			e.printStackTrace();
		}
	}

}

 使用

@Autowired
private RedissonUtils redissonUtils;

RLock fairLock = null; 
try {										           

      fairLock=redissonUtils.getLock(teacherListQueueLock_AFP);
      业务逻辑

} catch (Exception e) {
	  e.printStackTrace();
} finally {
	  fairLock.unlock();
}

 

connection参数说明：https://blog.youkuaiyun.com/qq_25582465/article/details/109311054