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redlock-cs

Build status

Distributed lock with Redis and C# (based on the redlock algorithm)

Redlock-cs is available through nuget as redlock-cs package.

Usage

Check our Unit Test.

The API is based on antirez Ruby implementation and works as in the following example:

// Declare a Distributed Lock based on 3 REDIS servers

var dlm = new Redlock(
		ConnectionMultiplexer.Connect("127.0.0.1:6379"), 
		ConnectionMultiplexer.Connect("127.0.0.1:6380"), 
		ConnectionMultiplexer.Connect("127.0.0.1:6381")
	      );

// Declare lock object.
Lock lockObject;

// Try to acquire the lock (with resourceName as lock identifier and an 
// expiration time of 10 seconds).
var locked = dlm.Lock(
		resourceName,
		new TimeSpan(0, 0, 10), 
		out lockObject
	     );

// If locked is true, lockObject is populated and the lock has been acquired, 
// otherwise the lock has not been acquired.

// Tries to release the lock contained in lockObject.
dlm.Unlock(lockObject);

TODO

  • Disposable pattern.
  • Hide StackExchange.Redis library inside Redlock object.

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redlock-cs's Issues

Will there be new release?

Hi

I need new version of nuget package which has interface instead of class in constructor (IConnectionMultiplexer instead of ConnectionMultiplexer) so in this form:

public Redlock(params IConnectionMultiplexer[] list)

Can you release a new version of nuget package having this change included?

Best regards
Piotr Filipowicz

Redis Distributed lock

Hi,
i am not able to take lock on resource.
its always returning false.
i am running on windows with single instance of redis running.
does it work in distributed env only ?

var dlm = new Redlock.CSharp.Redlock(ConnectionMultiplexer.Connect("127.0.0.1:6379"));

            Lock lockObject;
            Lock newLockObject;

            string resourceName = "test";

            var locked = dlm.Lock(resourceName, new TimeSpan(0, 0, 10), out lockObject);
            //Assert.IsTrue(locked, "Unable to get lock");
            locked = dlm.Lock(resourceName, new TimeSpan(0, 0, 10), out newLockObject);
            //Assert.IsFalse(locked, "lock taken, it shouldn't be possible");
            dlm.Unlock(lockObject);

Use interface IConnectionMultiplexer instead of instance class

The Redlock constructor takes an array of ConnectionMultiplexer classes.
ConnectionMultiplexer has an interface IConnectionMultiplexer that is more suitable for development.

It's reasonable to replace ConnectionMultiplexer class with IConnectionMultiplexer interface in constructor.

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