您忘记将订阅者客户端订阅到特定频道。此外,如果您想监视所有事件,则需要使用基于模式的订阅。
您可能想做这样的事情(未经测试):
subscriber.on("pmessage", function (pattern, channel, message) {
console.log("("+ pattern +")" + " client received message on " + channel + ": " + message);
switch (channel) {
// blah blah blah
// ...
}
});
subscriber.psubscribe(''__key*__:*')
查看更多信息Redis 文档 http://redis.io/topics/notifications,并在node_redis 示例 https://github.com/mranney/node_redis/tree/master/examples.
Update:
下面通过一个例子来说明通道订阅和模式订阅的区别。为了简洁起见,省略了适当的错误处理。
var redis = require("redis");
var client = redis.createClient('6379','127.0.0.1');
var subscriber1 = redis.createClient('6379','127.0.0.1');
var subscriber2 = redis.createClient('6379','127.0.0.1');
// First subscriber listens only to events occurring for key mykey
function S1(next) {
subscriber1.on('message', function(channel, msg) {
console.log( "S1: received on "+channel+" event "+msg )
});
subscriber1.subscribe( "__keyspace@0__:mykey", function (err) {
next();
});
}
// Second subscriber listens to events occuring for ALL keys
function S2(next) {
subscriber2.on('pmessage', function(pattern,channel, msg) {
console.log( "S2: received on "+channel+" event "+msg )
});
subscriber2.psubscribe( "__keyspace@0__:*", function (err) {
next();
});
}
// Do something with keys mykey and anotherkey
function do_something() {
client.set("mykey","example", function( err ) {
client.set("mykey", "another example", function( err ) {
client.del("mykey", function( err ) {
client.set("anotherkey","example", function( err ) {
client.del("anotherkey");
});
});
});
});
}
// Here we go
S1( function () {
S2( function () {
do_something();
});
});
该脚本的结果是:
S1: received on __keyspace@0__:mykey event set
S2: received on __keyspace@0__:mykey event set
S2: received on __keyspace@0__:mykey event set
S1: received on __keyspace@0__:mykey event set
S1: received on __keyspace@0__:mykey event del
S2: received on __keyspace@0__:mykey event del
S2: received on __keyspace@0__:anotherkey event set
S2: received on __keyspace@0__:anotherkey event del
您可以看到第一个订阅者仅收到 mykey 的事件,而第二个订阅者收到所有键的事件。