For Redis-Cluster subscribe expire keyevent

[Andrew Cheng]

我很难通过lettuce5.0.4RELEASE.i订阅redis-cluster。就像wiki一样。但是我刚刚收到了使用“PUBLISH __keyevent @ 0 __：expired”的事件。我找不到任何有用的方法来制作redis集群听到expire keyevent.could任何人都可以给我一些帮助。

这里显示了一些代码。

[Mark Paluch]

Hi Andrew, 

Please note the language of this forum is English and the majority does not understand most asian languages.

Cheers, 

Mark

Am 23. Juli 2018, 17:04 +0200 schrieb Andrew Cheng <hcc1...@gmail.com>:

我很难通过lettuce5.0.4RELEASE.i订阅redis-cluster。就像wiki一样。但是我刚刚收到了使用“PUBLISH __keyevent @ 0 __：expired”的事件。我找不到任何有用的方法来制作redis集群听到expire keyevent.could任何人都可以给我一些帮助。

这里显示了一些代码。

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[Andrew Cheng]

Hi Mark
Sorry,i don't know why the msg convert to chinese ,actually ,i use Lettuce.io 5.0.3RELEASE and also read the description about cluster pub/sub .I do the same with wiki,but i only received the msg from the cluster node which i subscribe.From code comment about "StatefulRedisClusterConnection" i saw "Due to Redis Cluster's nature,messages are broadcasted across the cluster and a client can connect to any arbitrary node to participate with a subscription." .that's my code,and i wish get help from yous.

Thanks.

On Tuesday, July 24, 2018 at 3:01:51 PM UTC+8, Mark Paluch wrote:

Hi Andrew, 

Please note the language of this forum is English and the majority does not understand most asian languages.

Cheers, 

Mark

Am 23. Juli 2018, 17:04 +0200 schrieb Andrew Cheng <hcc1...@gmail.com>:

我很难通过lettuce5.0.4RELEASE.i订阅redis-cluster。就像wiki一样。但是我刚刚收到了使用“PUBLISH __keyevent @ 0 __：expired”的事件。我找不到任何有用的方法来制作redis集群听到expire keyevent.could任何人都可以给我一些帮助。

这里显示了一些代码。

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[Mark Paluch]

Hi Andrew, 

there are two things to consider when using Pub/Sub and Redis Cluster:

1. Regular (user-space) Pub/Sub messages are broadcasted across the cluster. If you have two clients and each client is connected to a different cluster node, then one client can publish a message and the other one will receive the message without any special handling required on the client side.

2. Keyspace notifications remain node-local. If a key expires on a particular cluster node, then Redis Cluster does not propagate the message to other cluster nodes. This requires special configuration/handling on your client. You need to be connected and subscribed to the particular node.

You can listen to keyspace notifications with Lettuce's Cluster Pub/Sub connection by enabling node message propagation:

StatefulRedisClusterPubSubConnection<String, String> connection = clusterClient.connectPubSub();

connection.addListener(…);

connection.setNodeMessagePropagation(true);

 

RedisClusterPubSubCommands<String, String> sync = connection.sync();

sync.masters().commands().psubscribe("__key*__:*");

Cheers, 

Mark