Distributed lock development

Redisson分布式锁

搭建

maven

<!-- https://mvnrepository.com/artifact/org.redisson/redisson -->
<dependency>
    <groupId>org.redisson</groupId>
    <artifactId>redisson</artifactId>
    <version>3.12.0</version>
</dependency>

Build in single instance mode

github地址

https://github.com/redisson/redisson/wiki/2.-Configuration

配置类,加入ioc容器

// connects to 127.0.0.1:6379 by default
RedissonClient redisson = Redisson.create();

Config config = new Config();
config.useSingleServer().setAddress("redis://myredisserver:6379");
RedissonClient redisson = Redisson.create(config);

Distributed lock document address

https://github.com/redisson/redisson/wiki/8.-%E5%88%86%E5%B8%83%E5%BC%8F%E9%94%81%E5%92%8C%E5%90%8C%E6%AD%A5%E5%99%A8

可重入锁（Reentrant Lock）

There is no need to deal with power outages or program issues causing lock failures

 RLock lock = redisson.getLock("anyLock");
// 最常见的使用方法
lock.lock();//阻塞式等待,默认30s释放,There is no need to deal with power outages or program issues causing lock failures
// 加锁以后10秒钟自动解锁
// 无需调用unlock方法手动解锁
lock.lock(10, TimeUnit.SECONDS);

// 尝试加锁,最多等待100秒,上锁以后10秒自动解锁
boolean res = lock.tryLock(100, 10, TimeUnit.SECONDS);
if (res) {
    
   try {
    
     ...
   } finally {
    
       lock.unlock();
   }
}

公平锁（Fair Lock）

FIFOAlgorithm execution locks,Queue in turn for a lock

联锁（MultiLock）

红锁（RedLock）

读写锁（ReadWriteLock）

Read locks for read business,Write business use write lock,2used together.
The read-read business is a shared lock
The rest of the business is exclusive lock（阻塞等待）

信号量（Semaphore）

Available services such as service current limit

可过期性信号量（PermitExpirableSemaphore）

闭锁（CountDownLatch）

springCache开发