在node中實現zeromq的訂閱發佈模式

1. 安裝zeromq

   cnpm install zeromq@5

    

2. server端代碼：

   // pubber.js
   var zmq = require("zeromq"),
     sock = zmq.socket("pub");
    
   sock.bindSync("tcp://127.0.0.1:3000");
   console.log("Publisher bound to port 3000");
    
   setInterval(function() {
     console.log("sending a multipart message envelope");
     sock.send(["kitty cats", "one!"]);
     sock.send(["hello", "world"]);
   }, 1000);

    

3. 客戶端代碼：

   // subber.js
   var zmq = require("zeromq"),
     sock = zmq.socket("sub");
    
   sock.connect("tcp://193.112.215.17:7003");
   //指定訂閱的topic
   sock.subscribe("hello");
   console.log("Subscriber connected to port 3000");
   
   
   sock.on("message", function(topic, message) {
   	console.log(topic);
   	console.log(message);
     //arr.forEach(function(v,index,a){
   		//每一個數組中的值
           //console.log(v);
   		//每一個值的索引
           //console.log(index);
   		//數組本身
           //console.log(a[1]);
   		//for(var i=0;i<a.length;i++){
   		//	console.log(a[i]);
   		//}
   	//});
   	
   });