Redis支持这样一种特性,你可以将数据推到某个信息管道中,然后其它客户端可以通过订阅这些管道来获取推送过来的信息。使用Redis的Pub/Sub,接收方在某个channel注册为一个订阅者,然后监听这个channel,一旦有消息发到这个channel上则自动接收消息, 利用这个特性可以轻易的实现消息推送功能。
1. 使用Rediscli测试
客户端A订阅通道:
redis 127.0.0.1:6379> SUBSCRIBE channeltest
客户端B往该通道发送消息:
redis 127.0.0.1:6379> PUBLISH channeltest hello (integer) 1 redis 127.0.0.1:6379> PUBLISH channeltest world (integer) 1
然后客户端A就能获取到推送的信息
redis 127.0.0.1:6379> SUBSCRIBE channeltest Reading messages... (press Ctrl-C to quit) 1) "subscribe" 2) "channeltest" 3) (integer) 1 1) "message" 2) "channeltest" 3) "hello" 1) "message" 2) "channeltest" 3) "world"
2. 批量订阅测试
客户端A订阅通道:
redis 127.0.0.1:6379> SUBSCRIBE channeltest*
客户端B往该通道发送消息:
redis 127.0.0.1:6379> PUBLISH channeltest1 hello
(integer) 1 redis 127.0.0.1:6379> PUBLISH channeltest2 world (integer) 1
然后客户端A就能获取到推送的信息:
redis 127.0.0.1:6379> PSUBSCRIBE channeltest* Reading messages... (press Ctrl-C to quit) 1) "psubscribe" 2) "channeltest*" 3) (integer) 1 1) "pmessage" 2) "channeltest*" 3) "channeltest1" 4) "hello" 1) "pmessage" 2) "channeltest*" 3) "channeltest2" 4) "world"
3. C#客户端实现
客户端使用TeamDev.Redis
class Program { static void Main(string[] args) { try { RedisDataAccessProvider redisDataAccessProvider = new RedisDataAccessProvider(); redisDataAccessProvider = new RedisDataAccessProvider(); redisDataAccessProvider.Configuration.Host = "192.168.1.10"; redisDataAccessProvider.Configuration.Port = 6379; redisDataAccessProvider.Connect(); redisDataAccessProvider.ChannelSubscribed += new ChannelSubscribedHandler(redisDataAccessProvider_ChannelSubscribed); redisDataAccessProvider.MessageReceived += new MessageReceivedHandler(redisDataAccessProvider_MessageReceived); redisDataAccessProvider.Messaging.Subscribe("al"); redisDataAccessProvider.Messaging.Subscribe("b1"); } catch (Exception e) { Console.WriteLine("连接Redis错误:" + e.Message); } Console.ReadLine(); } static void redisDataAccessProvider_MessageReceived(string channelname, string message) { if (channelname == "a1") { Console.WriteLine(message); Console.ReadKey(); } } static void redisDataAccessProvider_ChannelSubscribed(string channelname) { Console.WriteLine(channelname); } }
原创文章,作者:Maggie-Hunter,如若转载,请注明出处:https://blog.ytso.com/4961.html