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ClusterEvent.d

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00001 /*******************************************************************************
00002 
00003         @file ClusterEvent.d
00004         
00005         Copyright (c) 2004 Kris Bell
00006         
00007         This software is provided 'as-is', without any express or implied
00008         warranty. In no event will the authors be held liable for damages
00009         of any kind arising from the use of this software.
00010         
00011         Permission is hereby granted to anyone to use this software for any 
00012         purpose, including commercial applications, and to alter it and/or 
00013         redistribute it freely, subject to the following restrictions:
00014         
00015         1. The origin of this software must not be misrepresented; you must 
00016            not claim that you wrote the original software. If you use this 
00017            software in a product, an acknowledgment within documentation of 
00018            said product would be appreciated but is not required.
00019 
00020         2. Altered source versions must be plainly marked as such, and must 
00021            not be misrepresented as being the original software.
00022 
00023         3. This notice may not be removed or altered from any distribution
00024            of the source.
00025 
00026         4. Derivative works are permitted, but they must carry this notice
00027            in full and credit the original source.
00028 
00029 
00030                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
00031 
00032 
00033         @version        Initial version, July 2004      
00034         @author         Kris
00035 
00036 
00037 *******************************************************************************/
00038 
00039 module mango.cluster.qos.socket.ClusterEvent;
00040 
00041 private import  mango.io.Buffer;
00042 
00043 private import  mango.cluster.model.ICluster;
00044 
00045 /*******************************************************************************
00046         
00047         The socket QOS implementation of IEvent
00048 
00049 *******************************************************************************/
00050 
00051 class ClusterEvent : IEvent
00052 {       
00053         private IEvent.Style    style;
00054         private ICluster        cluster;
00055         private IChannel        channel;
00056         private IEventListener  listener;
00057 
00058         private static char[][] styleNames = ["bulletin", "message"];
00059 
00060         /***********************************************************************
00061 
00062         ***********************************************************************/
00063         
00064         this (ICluster cluster, IChannel channel, IEvent.Style style, IEventListener listener)
00065         {
00066                 this.style = style;
00067                 this.cluster = cluster;
00068                 this.channel = channel;
00069                 this.listener = listener;
00070         }
00071 
00072         /***********************************************************************
00073 
00074         ***********************************************************************/
00075         
00076         IChannel getChannel ()
00077         {
00078                 return channel;
00079         }
00080 
00081         /***********************************************************************
00082 
00083         ***********************************************************************/
00084         
00085         IEvent.Style getStyle ()
00086         {
00087                 return style;
00088         }
00089 
00090         /***********************************************************************
00091 
00092         ***********************************************************************/
00093         
00094         char[] getStyleName ()
00095         {
00096                 return styleNames [style];
00097         }
00098 
00099         /***********************************************************************
00100 
00101         ***********************************************************************/
00102         
00103         void invoke (IPayload payload) 
00104         {
00105                 // dispatch notification
00106                 listener.notify (this, payload);
00107         }
00108 
00109         /***********************************************************************
00110 
00111                 Send a payload back to the producer. This should support all
00112                 the various event styles.                 
00113 
00114         ***********************************************************************/
00115         
00116         void reply (char[] channel, IPayload payload)
00117         in {
00118            assert (channel.length);
00119            }
00120         body
00121         {
00122                 IChannel ch = cluster.createChannel (channel);
00123 
00124                 if (style == IEvent.Style.Message)
00125                     cluster.putQueue (ch, payload);
00126                 else
00127                    cluster.broadcast (ch, payload);
00128         }
00129 }
00130 

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