springboot整合redisson分布式锁（redis集群模式）
1.maven引入redisson
org.redisson
redisson
3.5.0
2.redisson配置类，得到redisson对象，之后的分布式锁由redisson对象操作
2.1 在springboot的配置文件application.yml中添加redis集群的ip和端口还有密码
spring:
redis:
password: 123456
clusters: 10.10.1.1:7000,10.10.1.1:7001,10.10.1.1:7002,10.10.1.1:7003,10.10.1.1:7004,10.10.1.1:70052.2 创建 redisson配置类RedissonManager
import java.io.IOException;
import org.redisson.Redisson;
import org.redisson.api.RedissonClient;
import org.redisson.config.Config;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
/**
* redisson配置
*/
@Configuration
public class RedissonManager {
@Value("${spring.redis.clusters}")
private String cluster;
@Value("${spring.redis.password}")
private String password;
@Bean
public RedissonClient getRedisson(){
String[] nodes = cluster.split(",");
//redisson版本是3.5，集群的ip前面要加上“redis://”，不然会报错，3.2版本可不加
for(int i=0;i3.创建分布式锁的接口DistributedLocker
import java.util.concurrent.TimeUnit;
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
public interface DistributedLocker {
RLock lock(String lockKey);
RLock lock(String lockKey, long timeout);
RLock lock(String lockKey, TimeUnit unit, long timeout);
boolean tryLock(String lockKey, TimeUnit unit, long waitTime, long leaseTime);
void unlock(String lockKey);
void unlock(RLock lock);
}
4.创建接口DistributedLocker的实现类
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import java.util.concurrent.TimeUnit;
@Component
public class RedissonDistributedLocker implements DistributedLocker {
@Autowired
private RedissonClient redissonClient; //RedissonClient已经由配置类生成，这里自动装配即可
//lock(), 拿不到lock就不罢休，不然线程就一直block
@Override
public RLock lock(String lockKey) {
RLock lock = redissonClient.getLock(lockKey);
lock.lock();
return lock;
}
//leaseTime为加锁时间，单位为秒
@Override
public RLock lock(String lockKey, long leaseTime) {
RLock lock = redissonClient.getLock(lockKey);
lock.lock(leaseTime, TimeUnit.SECONDS);
return lock;
}
//timeout为加锁时间，时间单位由unit确定
@Override
public RLock lock(String lockKey, TimeUnit unit ,long timeout) {
RLock lock = redissonClient.getLock(lockKey);
lock.lock(timeout, unit);
return lock;
}
//tryLock()，马上返回，拿到lock就返回true，不然返回false。
//带时间限制的tryLock()，拿不到lock，就等一段时间，超时返回false.
@Override
public boolean tryLock(String lockKey, TimeUnit unit, long waitTime, long leaseTime) {
RLock lock = redissonClient.getLock(lockKey);
try {
return lock.tryLock(waitTime, leaseTime, unit);
} catch (InterruptedException e) {
return false;
}
}
@Override
public void unlock(String lockKey) {
RLock lock = redissonClient.getLock(lockKey);
lock.unlock();
}
@Override
public void unlock(RLock lock) {
lock.unlock();
}
}
5.使用分布式锁
@RestController
@RequestMapping("/redisson")
public class AdvMaterialController {
@Autowired
private DistributedLocker distributedLocker;
@RequestMapping("/test")
public void redissonTest() {
String key = "redisson_key";
for (int i = 0; i < 100; i++) {
Thread t = new Thread(new Runnable() {
@Override
public void run() {
try {
System.err.println("=============线程开启============"+Thread.currentThread().getName());
/*distributedLocker.lock(key,10L); //直接加锁，获取不到锁则一直等待获取锁
Thread.sleep(100); //获得锁之后可以进行相应的处理
System.err.println("======获得锁后进行相应的操作======"+Thread.currentThread().getName());
distributedLocker.unlock(key); //解锁
System.err.println("============================="+Thread.currentThread().getName());*/
boolean isGetLock = distributedLocker.tryLock(key,TimeUnit.SECONDS,5L,10L); //尝试获取锁，等待5秒，自己获得锁后一直不解锁则10秒后自动解锁
if(isGetLock){
Thread.sleep(100); //获得锁之后可以进行相应的处理
System.err.println("======获得锁后进行相应的操作======"+Thread.currentThread().getName());
//distributedLocker.unlock(key);
System.err.println("============================="+Thread.currentThread().getName());
}
} catch (Exception e) {
e.printStackTrace();
}
}
});
t.start();
}
}
}