写个适合自己的RPC Engine

学习了Swato之后，受到启发，对Zigzag Chen的代码作了点修改，写了个适合自己的RPC Engine:

 

1. // imports dependencies:  
2. GRS.loadJS("../jslib/3rdparty/prototype.js");  
3. GRS.loadJS("../jslib/3rdparty/json.js");  
4.   
5. Ext.namespace("GRS.rpc");  
6. /** 
7.  * Constructor of GRS.rpc.Engine 
8.  * @param url 
9.  * @param options 
10.  * @author Zhijie Chen <zigzag.chen@gmail.com> 
11.  * @author Sam Chen (inspired by Zigzag Chen's swato-engine.js) 
12.  * @version 1.0 11/22/2007 
13.  */  
14. GRS.rpc.Engine = function(url,options) {  
15.    this.url = url;  
16.    this.conn_id = Math.floor(Math.random()*100000000);  
17.    this.options = options;  
18.    GRS.rpc.Engine.superclass.constructor.call(this)  
19. }  
20. Ext.extend(  
21.    GRS.rpc.Engine,  
22.    Ext.util.Observable,  
23.    {call: function(catcher,serviceDotMethodName,params,options) {  
24.        if ( this.url == null ) return;  
25.        var serviceId=serviceDotMethodName.substring(0,serviceDotMethodName.indexOf("."));  
26.        var methodName=serviceDotMethodName.substring(serviceDotMethodName.indexOf(".")+1,serviceDotMethodName.length);  
27.        var option=new Object();  
28.        Object.extend(option,options);  
29.        option.onComplete=this._onRequestComplete.bind(catcher);  
30.        new Ajax.Request(this.url+"/"+serviceId, this._requestOptions(serviceId.hashCode||serviceId,methodName,params,option));  
31.     },  
32.     fetch: function(catcher,url,options) {  
33.        if ( url == null ) return;  
34.        var option=new Object();  
35.        Object.extend(option,options);  
36.        option.onComplete=this._onRequestComplete.bind(catcher);  
37.        new Ajax.Request(url,option);  
38.     },    
39.     send: function(catcher,jsObject,remoteObjectID,options) {  
40.        this.call(catcher,remoteObjectID,'',[jsObject],options);  
41.     },  
42.     _requestOptions: function(remoteObjectID,methodName,params,options) {  
43.        var sendingData={  
44.           "params":params,  
45.           "method":methodName,  
46.           "id":remoteObjectID,  
47.           "conn_id":this.conn_id};  
48.        var requestOptions=new Object();  
49.        Object.extend(requestOptions,this.options);  
50.        Object.extend(requestOptions,options);  
51.        requestOptions.parameters=JSON.stringify(sendingData);  
52.        return requestOptions;  
53.     },  
54.     _onRequestComplete : function(response) {  
55.        if (response.status != 200) {  
56.           return;  
57.        }  
58.        eval("var error = " + response.responseText.error);  
59.        if (error!=undefined) {  
60.           if (this.failure!=null) {  
61.              // call the failure handler  
62.              this.failure.apply(this, [error]);  
63.           } else {  
64.              alert("Warning from rpc.js : Error occurred and no error handler defined.");  
65.           }  
66.        } else {  
67.           if (this.success!=null){  
68.              // call the success handler:  
69.              this.success.apply(this, [response.responseText]);  
70.           }  
71.        }  
72.     }  
73.    }  
74. );  
75.   
76. // global rpcengine  
77. rpcengine=new GRS.rpc.Engine("/RPCServlet");  

简单的测试代码：

 

1. <script type="text/javascript" charset="UTF-8" src="../../3rdparty/ext-2.0-beta1/adapter/ext/ext-base.js"></script>  
2. <script type="text/javascript" charset="UTF-8" src="../../3rdparty/ext-2.0-beta1/ext-all.js"></script>  
3.   
4. <script type="text/javascript" charset="UTF-8" src="../grsframework-core.js"></script>    
5. <script type="text/javascript" charset="UTF-8" src="../rpc.js"></script>  
6.   
7. <script>  
8. var handler={  
9.     success:function(ret){  
10.         alert("testRPC.html :: Result :: " + ret);  
11.     },  
12.     failure:function(err){  
13.         alert("Err occurred : " + err);  
14.     }  
15. };  
16. window.onload = function() {  
17.    alert("testing rpcengine...");  
18.    rpcengine.call(handler,"userManager.getUserList",[]);  
19. }  
20. </script>