新人补钙系列教程之： 搭建 PureMVC pipe

首先我们需要建立一个类来声明一些管道常量

1. package com.hpcc.police.common 
2. {
4. public class PipeAwareModuleConstants
5. {
6.   // const 
7.   public static const SHELL_TO_MODULE_PIPE:String = 'shellToModulePipe'; 
8.   public static const STDOUT:String = 'standardOutput';
9.   public static const STDIN:String = 'standardInput';  
10.   public static const MODULE_TO_SHELL_PIPE:String = 'moduleToShellPipe';
12.   public static const MODULE_TO_SHELL_MESSAGE: String = "moduleToShellMessage";
13.   public static const SHELL_TO_MODULE_MESSAGE:String = 'shellToModuleMessage';
14.   public static const MODULE_TO_MODULE_PIPE:String = 'moduleToModulePipe';
15.   
17.   public function PipeAwareModuleConstants()
18.   {
19.    
20.   }
21. }
22. }

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然后再shell的view层写一个Mediator文件 这个文件继承自JunctionMediator 我的文件名叫ShellJunctionMediator

我只把有用的代码 粘上来了 至于Mediator类的模板你随便下个就有了

直接看代码吧
这里我们需要声明一个object来保存建立的管道信息 这样你在删除管道的时候就可一根据名字来进行删除

1. private var outMap:Object = {};//这个就是保存管道信息的类
2. [code]override public function handleNotification(note:INotification):void
3.   {
4.   
5.    var moduleID:String = String(note.getBody())
6.    switch(note.getName()) 
7.    {
8.     case ApplicationFacade.MODULE_ADDED:
9.      connectModule(note.getBody() as IPipeAwareModule);//在module加载完毕时创建管道连接
10. break;
11.       case ApplicationFacade.DISCONNECT_MOUDLE_PIPE:
12.      var junctionOut:TeeSplit = junction.retrievePipe(PipeAwareModuleConstants.STDOUT) as TeeSplit;
13.      junctionOut.disconnectFitting(outMap[moduleID])//删除时你只需要删除主应用到module的就可以了
14.    delete outMap[moduleID];
15.     break; 
16.     default:
17.      super.handleNotification(note);
18.     break;   
19.    }
20.   } 
21.   
22.   
23.   
24.   public function connectModule(module:IPipeAwareModule):void
25.   {
26.        // Register SHELL_TO_MODULE_PIPE from the shell to all modules(注册从主应用到所有Module的管道)
27.    junction.registerPipe(PipeAwareModuleConstants.STDOUT,Junction.OUTPUT,new TeeSplit());
28.    
29.    // Register MODULE_TO_SHELL_PIPE to the shell from all modules (注册从所有Module到主应用的管道)
30.    junction.registerPipe(PipeAwareModuleConstants.STDIN,Junction.INPUT,new TeeMerge());
31.    
32.    // add a pipe listener for messages sended by module(给Module发送的message添加管道监听)  
33.    junction.addPipeListener(PipeAwareModuleConstants.STDIN,this,handlePipeMessage);
34.   
35.    
36.    // module -> shell(从module到主应用)
37.    var moduleToShell:Pipe=new Pipe();
38.    module.acceptOutputPipe(PipeAwareModuleConstants.MODULE_TO_SHELL_PIPE,moduleToShell);
39.    var shellInFitting:TeeMerge=junction.retrievePipe(PipeAwareModuleConstants.STDIN) as TeeMerge;
40.    shellInFitting.connectInput(moduleToShell);
41.    
42.    //shell -> module(从主应用到module)
43.    var shellToModule:Pipe=new Pipe();
44.    module.acceptInputPipe(PipeAwareModuleConstants.STDOUT,shellToModule);
45.    var shellOutFitting:TeeSplit=junction.retrievePipe(PipeAwareModuleConstants.STDOUT) as TeeSplit;
46.    shellOutFitting.connect(shellToModule);
47.    var moduleID:String = String(module)
48.    outMap[moduleID] = shellToModule;
49.   }
50.    
51.   
52.   override public function handlePipeMessage(message:IPipeMessage):void
53.   {  }

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这样shell到module之间的管道已经建立了 下面我们还需要建立module到module之间的管道信息

还是直接代码吧

1. override public function handleNotification(note:INotification):void
2.   {
3.   
4.    var moduleID:String = String(note.getBody())
5.    //var moduleFacade:IPipeAware = note.getBody() as IPipeAware
6.    
7.    switch(note.getName()) 
8.    {
9.     case ApplicationFacade.MODULE_ADDED:
10.      connectModule(note.getBody() as IPipeAwareModule);
11.     
12.     break;
13.     case ApplicationFacade.DISCONNECT_MODULE_TO_MODULE:
14.      var junctionOut:TeeSplit = junction.retrievePipe(PipeAwareModuleConstants.STDIN) as TeeSplit;
15.      junctionOut.disconnectFitting(outMap[moduleID])
16.      delete outMap[moduleID];
17.     break;
18.     default:
19.      super.handleNotification(note);
20.     break;   
21.    }
22.   } 
23.    
24.   
25.   
26.   public function connectModule(module:IPipeAwareModule):void
27.   {
28.     // Register SHELL_TO_MODULE_PIPE from the shell to all modules(注册从主应用到所有Module的管道)
29.    junction.registerPipe(PipeAwareModuleConstants.STDIN,Junction.OUTPUT,new TeeSplit());
30.    
31.    // Register MODULE_TO_MODULE_PIPE to the modules from all modules (注册从所有Module到Module的管道)
32.    junction.registerPipe(PipeAwareModuleConstants.MODULE_TO_MODULE_PIPE,Junction.INPUT,new TeeMerge());
33.    
34.    // add a pipe listener for messages sended by module(给Module发送的message添加管道监听)  
35.    junction.addPipeListener(PipeAwareModuleConstants.MODULE_TO_MODULE_PIPE,this,handlePipeMessage);
36.    
37.     
38.    // module -> shell(从module到主应用)
39.    var moduleToShellJunction:Pipe=new Pipe();
40.    module.acceptOutputPipe(PipeAwareModuleConstants.MODULE_TO_MODULE_PIPE,moduleToShellJunction);
41.    var shellInFitting:TeeMerge=junction.retrievePipe(PipeAwareModuleConstants.MODULE_TO_MODULE_PIPE) as TeeMerge;
42.    shellInFitting.connectInput(moduleToShellJunction);
43.    
44.    //shell -> module(从主应用到module)
45.    var shellToModuleJunction:Pipe=new Pipe();
46.    module.acceptInputPipe(PipeAwareModuleConstants.STDIN,shellToModuleJunction);
47.    var shellOutFitting:TeeSplit=junction.retrievePipe(PipeAwareModuleConstants.STDIN) as TeeSplit;
48.    shellOutFitting.connect(shellToModuleJunction);
49.    var moduleID:String = String(module)
50.    outMap[moduleID] = shellToModuleJunction;
51.   }
52.    
53.   
55. //注意下这的处理管道信息方式与shell到module的不一样
56. override public function handlePipeMessage(message:IPipeMessage):void
57.   {
58.    var junctionOut:TeeSplit = junction.retrievePipe( PipeAwareModuleConstants.STDIN ) as TeeSplit;
59.    junctionOut.write( message );
60.   }   

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以上两个文件的是在shell的view层写的 下面该module的view层做些什么了

1. override public function onRegister():void
2.   {
3.    var teeMerge:TeeMerge = new TeeMerge();
4.    junction.registerPipe( PipeAwareModuleConstants.STDIN, Junction.INPUT, teeMerge );
5.    junction.addPipeListener( PipeAwareModuleConstants.STDIN, this, handlePipeMessage );
7.    var teeSplit:TeeSplit = new TeeSplit();   
8.    junction.registerPipe( PipeAwareModuleConstants.MODULE_TO_MODULE_PIPE, Junction.OUTPUT, teeSplit );
9.   } 
10.    
11.   override public function onRemove():void
12.   {
13.   } 
14.    
15.   override public function listNotificationInterests():Array
16.   {
17.     var interests:Array = super.listNotificationInterests();
18.    return interests; 
19.   }
21.   override public function handleNotification( note:INotification ):void
22.   {
23.       var pipe:IPipeFitting;
24.    var type:String = note.getType() as String;
25.    switch( note.getName() )
26.    {
27.      case JunctionMediator.ACCEPT_INPUT_PIPE:
28.     {
29.      
30.      if (type ==PipeAwareModuleConstants.STDIN)
31.      {
32.       pipe = note.getBody() as IPipeFitting;
33.       var teeMerge:TeeMerge = junction.retrievePipe(PipeAwareModuleConstants.STDIN) as TeeMerge;
34.       teeMerge.connectInput(pipe);
35.        
36.       
37.       //It does not need to be handled by super.  
38.       return;
39.      }
40.       
41.      break;  
42.     }
43.     
44.    
45.     case JunctionMediator.ACCEPT_OUTPUT_PIPE:
46.     {
47.      
48.      if (type == PipeAwareModuleConstants.MODULE_TO_MODULE_PIPE)
49.      {
50.       pipe = note.getBody() as IPipeFitting;
51.       var teeSplit:TeeSplit = junction.retrievePipe(PipeAwareModuleConstants.MODULE_TO_MODULE_PIPE) as TeeSplit;
52.       teeSplit.connect( pipe );
53.       
54.       //It does not need to be handled by super.  
55.       return;
56.      }
57.      
58.      break;
59.     }           
60.    }  
61.    super.handleNotification(note);//

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这个地方大家一定要注意下 它是写在switch语句外面的 如果你写在里面了 shell到module的管道通信就没被注册