原文:https://blog.csdn.net/c_zyer/article/details/79415728

本文主要跟大家分享在Springboot中集成Jedis和Redisson的方法。为什么要集成两个redis客户端?那是因为它们各有所长也各有所缺,合在一起才能完善彼此。Jedis作为Redis客户端的java版实现实现了绝大部分的Redis原生功能,但是却没有对分布式线程控制做很好的支持。而Redisson是Redis官方推荐的支持分布式操作的Redis Java版客户端,但它却不支持一些基础的Redis原生功能,所以Jedis和Redisson只有整合到一起使用,才能更好的满足用户的需求。

接下来,分几个步骤分享给大家如何在Springboot中集成Jedis和Redisson。

首先,通过start.spring.io生成一个支持redis的web项目

将生成的项目导入IDE,e.g., Intellij IDEA.

在pom文件中加入redisson依赖 (添加完后,可以做下Maven -> Reimport)

为每个环境创建一套配置文件

本地开发环境以-local结尾,测试环境以-test结尾,生产环境以-prod结尾。然后在application.yml配置文件中指定激活那个环境的配置文件

spring:
application:
name: demo
profiles:
active: '@profileActive@'

此处别忘了

在相应环境的application配置文件中添加相应的Redis配置(Redis服务做成了哨兵模式),比如,在application-local.yml加入

spring:
redis:
database: 0
password: 12345678 #密码
port: 6379
timeout: 0
pool:
max-active: 8 #最大连接数
max-idle: 8 #最大空闲连接数
max-wait: -1 #最大等待时间
min-idle: 0
sentinel:
master: master1
nodes: 172.16.33.216:16001,172.16.33.216:16002
server:
port: 9090

在相应环境的Redisson配置文件中加入Redisson的配置信息(配置来源Redisson官方,点击查看

---
sentinelServersConfig:
idleConnectionTimeout: 10000
pingTimeout: 1000
connectTimeout: 10000
timeout: 3000
retryAttempts: 3
retryInterval: 1500
reconnectionTimeout: 3000
failedAttempts: 3
password: 12345678
subscriptionsPerConnection: 5
clientName: null
loadBalancer: !<org.redisson.connection.balancer.RoundRobinLoadBalancer> {}
slaveSubscriptionConnectionMinimumIdleSize: 1
slaveSubscriptionConnectionPoolSize: 50
slaveConnectionMinimumIdleSize: 10
slaveConnectionPoolSize: 64
masterConnectionMinimumIdleSize: 10
masterConnectionPoolSize: 64
readMode: "SLAVE"
sentinelAddresses:
- "redis://172.16.33.216:16001"
- "redis://172.16.33.216:16002"
masterName: "master1"
database: 0
threads: 0
nettyThreads: 0
codec: !<org.redisson.codec.JsonJacksonCodec> {}
useLinuxNativeEpoll: false

配置文件配好后,还需要注册一个Springboot的启动类(DemoApplication.java)中注册一个RedissonClient Bean,方法如下:

@Autowired
private Environment env; @Bean(destroyMethod = "shutdown")
public RedissonClient redissonClient() throws IOException {
String[] profiles = env.getActiveProfiles();
String profile = "";
if(profiles.length > 0) {
profile = "-" + profiles[0];
}
return Redisson.create(
Config.fromYAML(new ClassPathResource("redisson" + profile + ".yml").getInputStream())
);
}

Everything is ready. Now let's rock.

创建一个Controller类

@RestController
@RequestMapping("/demo")
public class DemoController { private static Logger logger = LoggerFactory.getLogger(DemoController.class); @Autowired
private RedisTemplate<String, String> redisTemplate;
@Autowired
private RedissonClient redissonClient; @ResponseBody
@RequestMapping("/lock")
public String lock(@RequestParam("sid") String serverId) {
Long counter = redisTemplate.opsForValue().increment("COUNTER", 1);
RLock lock = redissonClient.getLock("TEST");
try {
lock.lock();
logger.info("Request Thread - " + counter + "[" + serverId +"] locked and begun...");
Thread.sleep(5000); // 5 sec
logger.info("Request Thread - " + counter + "[" + serverId +"] ended successfully...");
} catch (Exception ex) {
logger.error("Error occurred");
} finally {
lock.unlock();
logger.info("Request Thread - " + counter + "[" + serverId +"] unlocked...");
} return "lock-" + counter + "[" + serverId +"]";
}
}

Code 完成,启动程序,在浏览器中试一把先

=================================================================

以下自己实现的

import java.io.IOException;

import org.redisson.Redisson;
import org.redisson.api.RedissonClient;
import org.redisson.config.Config;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.core.env.Environment;
import org.springframework.core.io.ClassPathResource;
import org.springframework.stereotype.Component; @Component
public class RedissonClientConfig { @Autowired
private Environment env; @Bean(destroyMethod = "shutdown")
public RedissonClient redissonClient() throws IOException {
String[] profiles = env.getActiveProfiles();
String profile = "";
if(profiles.length > 0) {
profile = "-" + profiles[0];
}
return Redisson.create(Config.fromYAML(new ClassPathResource("redisson" + profile + ".yml").getInputStream()));
} }

配置文件  redisson-prod.yml

singleServerConfig:
idleConnectionTimeout: 10000
pingTimeout: 1000
connectTimeout: 10000
timeout: 3000
retryAttempts: 3
retryInterval: 1500
reconnectionTimeout: 3000
failedAttempts: 3
password: null
subscriptionsPerConnection: 5
clientName: null
address: "redis://192.168.20.123:6379"
password: 123456
subscriptionConnectionMinimumIdleSize: 1
subscriptionConnectionPoolSize: 50
connectionMinimumIdleSize: 32
connectionPoolSize: 64
database: 15
dnsMonitoring: false
dnsMonitoringInterval: 5000
threads: 0
nettyThreads: 0
codec: !<org.redisson.codec.JsonJacksonCodec> {}
"transportMode": "NIO"

controller

import java.util.concurrent.TimeUnit;

import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController; @RestController
@RequestMapping("/demo")
public class DemoController { private static Logger logger = LoggerFactory.getLogger(DemoController.class); @Autowired
private RedisTemplate<String, String> redisTemplate;
@Autowired
private RedissonClient redissonClient; public static int COUNT = 3; @ResponseBody
@RequestMapping("/lock")
public String lock(@RequestParam("sid") String serverId) {
Long counter = redisTemplate.opsForValue().increment("COUNTER", 1);
redisTemplate.expire("COUNTER", 43200, TimeUnit.SECONDS); if (counter>3) {
return "大于3了";
}
RLock lock = redissonClient.getFairLock("TEST");
try {
lock.lock(5, TimeUnit.SECONDS); logger.info("Request Thread - " + counter + "[" + serverId +"] locked and begun...");
if (COUNT > 0) {
COUNT = COUNT - 1;
Thread.sleep(1000);
} else {
return "为0了";
}
logger.info("Request Thread - " + counter + "[" + serverId +"] ended successfully...");
} catch (Exception ex) {
logger.error("Error occurred");
} finally {
if (lock != null && lock.isLocked()) {
lock.unlock();
}
logger.info("Request Thread - " + counter + "[" + serverId +"] unlocked...");
} return "卖出lock-" + counter + "[" + serverId +"]" + COUNT;
} }

写个多线程测试

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.CountDownLatch; import com.hyb.util.HttpClientUtil; //多线程的写法1
public class Thread12 { private static Map<String,String> parms = new HashMap<String,String>(); public static void main(String[] args) {
testCountDownLatch();
} public static void testCountDownLatch(){ int threadCount = 2000; final CountDownLatch latch = new CountDownLatch(threadCount);
for(int i=0; i< threadCount; i++){ new Thread(new Runnable() { @Override
public void run() { System.out.println("线程" + Thread.currentThread().getId() + "开始出发"); try {
parms.put("sid", "线程id=" +Thread.currentThread().getId());
String result = HttpClientUtil.doGet("http://192.168.20.234:8061/demo/lock", parms, 20000);
System.out.println("线程result" + result);
} catch (Exception e) {
e.printStackTrace();
} System.out.println("线程" + Thread.currentThread().getId() + "已到达终点"); latch.countDown();
}
}).start();
} try {
latch.await();
} catch (InterruptedException e) {
e.printStackTrace();
} System.out.println(threadCount+"个线程已经执行完毕");
} }
import java.util.HashMap;
import java.util.Map; import com.hyb.util.HttpClientUtil; //多线程的写法1
public class Thread12 { public static void main(String args[]) { MyThread myThread =new MyThread();
//myThread.run();
//把这个MyThread包装称为Thread
Thread t1 =new Thread(myThread);
Thread t2=new Thread(myThread);
Thread t3=new Thread(myThread);
Thread t4=new Thread(myThread);
Thread t5=new Thread(myThread);
Thread t6=new Thread(myThread);
Thread t7=new Thread(myThread);
Thread t8=new Thread(myThread);
Thread t9=new Thread(myThread);
Thread t10=new Thread(myThread);
Thread t11=new Thread(myThread);
Thread t12=new Thread(myThread);
t1.start();
t2.start();
t3.start();
t4.start();
t5.start();
t6.start();
t7.start();
t8.start();
t9.start();
t10.start();
t11.start();
t12.start();
} } class MyThread implements Runnable { private static Map<String,String> parms = new HashMap<String,String>(); @Override
public void run() {
parms.put("sid", Thread.currentThread().getName());
String result = HttpClientUtil.doGet("http://192.168.20.234:8061/demo/lock", parms, 20000);
System.out.println("返回:"+result);
} }

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