Fair Lock The Redisson distributed reentrant fair lock based on Redis is also a RLock object that implements the java.util.concurrent.locks.Lock interface. It also provides asynchronous (Async), reflective (Reactive) and RxJava2 standard interfaces. It ensures that when multiple Redisson client threads request locks at the same time, priority will be given to the thread that made […]
Tag: redisson
Use redis current limiting — redisson implementation
springboot integrates redisson Please click here Application scenarios Able to accurately limit current flow for specified interfaces Description Redisson uses the leaky bucket algorithm implemented by redis + lua script to limit current Distributed current limiting and stand-alone current limiting can be carried out Use RRateLimiter for current limiting @GetMapping(“/rateLimit”) public String rateLimit(HttpServletRequest request) { […]
Redisson distributed lock
. Beginning In a single application, we can use Java’s synchronized or lock to use locks, but in a microservice scenario, an application will deploy multiple instances, which requires To ensure that multiple threads of multiple instances can only have one thread operating resources at the same time, distributed locks are required. The basic principle […]
Redisson principle analysis
<T> RFuture<T> tryLockInnerAsync(long waitTime, long leaseTime, TimeUnit unit, long threadId, RedisStrictCommand<T> command) { return evalWriteAsync(getRawName(), LongCodec.INSTANCE, command, “if (redis.call(‘exists’, KEYS[1]) == 0) then ” + “redis.call(‘hincrby’, KEYS[1], ARGV[2], 1); ” + “redis.call(‘pexpire’, KEYS[1], ARGV[1]); ” + //Set the timeout “return nil; ” + “end; ” + “if (redis.call(‘hexists’, KEYS[1], ARGV[2]) == 1) then ” + […]
Annotations elegantly implement Redisson distributed locks
1Foreword In daily development, it is inevitable to encounter some concurrency scenarios. In order to ensure the consistency of interface execution, locking is usually used. Because the service is a distributed deployment mode, the local locks Reentrantlock and Synchnorized are put aside first. Redis’s The problem of setnx lock being unable to guarantee atomicity will […]
Usage scenarios and possible problems of MultiLock and RedLock distributed locks implemented by redisson.
Table of Contents 1. Introduction to redisson 2. Interlocking MultiLock and RedLock 3. Possible functional defects of these two locks 4. Solutions to problems – personal ideas 1. Introduction to redisson Redisson is a Java in-memory data grid (In-Memory Data Grid) implemented on the basis of Redis. It is an advanced distributed lock client based […]
Redisson distributed lock usage and source code analysis
Redisson distributed lock usage and source code analysis About introduction The way to implement distributed locks is mainly through Lua scripts. A characteristic of Lua scripts is that they can execute multiple commands and are atomic. (If you don’t know Lua scripts, you can go to the official website or github to learn more. Official […]
Redisson’s watchdog strategy – a mechanism to ensure the security and stability of Redis data
Foreword Custom redis distributed locks cannot be automatically renewed. For example, a lock is set to be released with a timeout of 1 minute. If the thread that obtains the lock does not complete execution within one minute, the lock will be obtained by other threads, which may cause This leads to serious online problems. […]
From principle to practice, analyze the implementation scheme of Redisson distributed lock
Previously we explained how to use Redis to implement distributed locks. It provides simple primitives to implement distributed locks based on Redis. However, Redis also has some shortcomings as an implementation of distributed locks. This article will introduce Redisson to implement distributed locks. Portal: https://blog.csdn.net/Ascend1977/article/details/131221941 1What is Redisson Redisson is a distributed Java framework based […]
mq consumption concurrent queuing and idempotent mechanism implementation-redisson
1. What problems to solve and how to implement them Mainly to solve the problem of concurrent access queuing execution and repeated delivery to ensure idempotence. Implement technical solutions How to implement concurrent access and request queuing execution methods. @Redssion How to ensure idempotence when MQ repeats delivery. @redis First insert a topic of distributed […]