websocket.js

websocket.js

(function() {	
	// window object
	var global = window;
	
	// WebSocket Object. All listener methods are cleaned up!
	var WebSocket = global.WebSocket = function(url) {
		// get a new websocket object from factory (check com.strumsoft.websocket.WebSocketFactory.java)
		this.socket = WebSocketFactory.getInstance(url);
		// store in registry
		if(this.socket) {
			WebSocket.store[this.socket.getId()] = this;
		} else {
			throw new Error('Websocket instantiation failed! Address might be wrong.');
		}
	};
	
	// storage to hold websocket object for later invokation of event methods
	WebSocket.store = {};
	
	// static event methods to call event methods on target websocket objects
	WebSocket.onmessage = function (evt) {
		WebSocket.store[evt._target]['onmessage'].call(global, evt);
	}	
	
	WebSocket.onopen = function (evt) {
		WebSocket.store[evt._target]['onopen'].call(global, evt);
	}
	
	WebSocket.onclose = function (evt) {
		WebSocket.store[evt._target]['onclose'].call(global, evt);
	}
	
	WebSocket.onerror = function (evt) {
		WebSocket.store[evt._target]['onerror'].call(global, evt);
	}

	// instance event methods
	WebSocket.prototype.send = function(data) {
		this.socket.send(data);
	}

	WebSocket.prototype.close = function() {
		this.socket.close();
	}
	
	WebSocket.prototype.getReadyState = function() {
		this.socket.getReadyState();
	}
	///////////// Must be overloaded
	WebSocket.prototype.onopen = function(){
		throw new Error('onopen not implemented.');
    };
    
    // alerts message pushed from server
    WebSocket.prototype.onmessage = function(msg){
    	throw new Error('onmessage not implemented.');
    };

    // 其它原型函数，省略......
})();