flex4访问amfphp之gateway封装类

较FLEX3来说，FLEX4在remoting通讯方面做得非常好了，提供了良好的可视化操作与自动产生代码，但习惯于自己编写代码，因为个人认为这样来得更自由、同时节省代码，所以就写了一个类，配合单例形式访问，应更好一点，同时与大家分享，请指教。

封装类：

package com.zhi.helper{import flash.events.NetStatusEvent;import flash.net.NetConnection;import flash.net.Responder;import mx.rpc.events.FaultEvent;import mx.rpc.events.ResultEvent;import mx.controls.Alert;public class Gateway{private var _conn:NetConnection;private var _remotingGateway:String;private var _statusMsgAry:Array=new Array();public function Gateway(){}public function connect():void{this._conn=new NetConnection();_conn.connect(_remotingGateway); _conn.addEventListener(NetStatusEvent.NET_STATUS, netStatusHandler);//侦听连接状态}private function netStatusHandler(evt:NetStatusEvent):void { var info:Object = evt.info; Alert.show(info.code);switch(info.code){ case "NetConnection.Connect.Success": this._statusMsgAry.push(1);this._statusMsgAry.push("链接成功");break; case "NetConnection.Connect.Rejected": this._statusMsgAry.push(0);this._statusMsgAry.push("远端GATEWAY连接被拒绝");break; case "NetConnection.Connect.Failed": this._statusMsgAry.push(0);this._statusMsgAry.push("远端GATEWAY连接失败");break; case "NetConnection.Connect.Closed": this._statusMsgAry.push(0);this._statusMsgAry.push("远端GATEWAY连接已经关闭");break; case "NetConnection.Call.BadVersion": this._statusMsgAry.push(0);this._statusMsgAry.push("远端GATEWAY错误");break; } } public function call(command:String,onResult:Function,onFault:Function,... arguments):void{var responder:Responder=new Responder(function(result:Object):void{onResult(result);},function(fault:Object):void{onFault(fault);});arguments.unshift(responder);arguments.unshift(command);this._conn.call.apply(this,arguments);}public function get statusMsg():Array{return _statusMsgAry;}public function get remotingGateway():String{return _remotingGateway;}public function set remotingGateway(value:String):void{_remotingGateway = value;}public function get conn():NetConnection{return _conn;}}}

单例类：

package com.zhi.singleton{import com.zhi.helper.Gateway;public class Sgateway{private static var _instance:Gateway; public function Sgateway(){if(_instance != null) { throw new Error("Singleton Error:com.zhi.singleton.Sgateway"); } }public static function getInstance():Gateway { if(_instance == null) { _instance = new Gateway(); } return _instance; } }}