README

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an easy redis-based distributed-lock implementation for hyperf 2.*。 This extension features distributed-lock includes block and unblock distributed-lock.

Principle

The command in Redis is atomic.so we use set to make sure that your application executes sequentially. The Redis version before 2.8 does't support the option ex in set command. so we just use setnx+expire instead.>> Version 1.* The Redis version after 2.8 supports the option ex in set command. so we use set nx ex>> Version 2.*

so version 2.* supports the version of redis after 2.8. version 1.* supports all the versions of redis.

Redis version

redis-server --version

Install

Run composer require lysice/hyperf-redis-lock

Usage

init the redis object

    /**
     * @var RedisProxy
     */
    protected $redis;

    public function __construct(RedisFactory $redisFactory)
    {
        $this->redis = $redisFactory->get('default');
    }

• non-block lock we try to acquire the lock then return the result directly.If acquire the lock, execute the Closure and return the Closure's result. or return false;

public function lock(ResponseInterface $response)
    {
        $lock = new RedisLock($this->redis, 'lock', 20);
        $res = $lock->get(function () {
            sleep(10);
            return [123];
        });
        return $response->json($res);
    }

• blocking lock we try acquire the lock first. 1.if failed we try to acquire the lock every 250 ms util timeout(the time we waiting for is bigger than the expire time you set in your application) 2.if success then execute the closure and return the result of closure.
  Tips: if timeout occurs in the process of application you need to catch the exception LockTimeoutException to handle this situation. for example:

/**
     * @return \Psr\Http\Message\ResponseInterface
     */
    public function lockA(ResponseInterface $response)
    {
        try {
            $lock = new RedisLock($this->redis, 'lock', 4);
            $res = $lock->block(4, function () {
                return [456];
            });
            return $response->json(['res' => $res]);
        // catch the exception
        } catch (LockTimeoutException $exception) {
            var_dump('lockA lock check timeout');
            return $response->json(['res' => false, 'message' => 'timeout']);
        }
    }

Finally

Contributing

Feel free to create a fork and submit a pull request if you would like to contribute.

Bug reports

Raise an issue on GitHub if you notice something broken.