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1   /*
2    *   @(#) $Id: ProtocolThreadPoolFilter.java 264677 2005-08-30 02:44:35Z trustin $
3    *
4    *   Copyright 2004 The Apache Software Foundation
5    *
6    *   Licensed under the Apache License, Version 2.0 (the "License");
7    *   you may not use this file except in compliance with the License.
8    *   You may obtain a copy of the License at
9    *
10   *       http://www.apache.org/licenses/LICENSE-2.0
11   *
12   *   Unless required by applicable law or agreed to in writing, software
13   *   distributed under the License is distributed on an "AS IS" BASIS,
14   *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   *   See the License for the specific language governing permissions and
16   *   limitations under the License.
17   *
18   */
19  package org.apache.mina.protocol.filter;
20  
21  import org.apache.mina.common.IdleStatus;
22  import org.apache.mina.common.Session;
23  import org.apache.mina.protocol.ProtocolHandler;
24  import org.apache.mina.protocol.ProtocolFilter;
25  import org.apache.mina.protocol.ProtocolSession;
26  import org.apache.mina.util.BaseThreadPool;
27  import org.apache.mina.util.EventType;
28  import org.apache.mina.util.ThreadPool;
29  
30  /***
31   * A Thread-pooling filter.  This filter forwards {@link ProtocolHandler} events
32   * to its thread pool.
33   * 
34   * @author Trustin Lee (trustin@apache.org)
35   * @version $Rev: 264677 $, $Date: 2005-08-30 11:44:35 +0900 $
36   * 
37   * @see ThreadPool
38   * @see BaseThreadPool
39   */
40  public class ProtocolThreadPoolFilter extends BaseThreadPool implements ThreadPool, ProtocolFilter
41  {
42  
43      /***
44       * Creates a new instanceof this filter with default thread pool settings.
45       * You'll have to invoke {@link #start()} method to start threads actually.
46       */
47      public ProtocolThreadPoolFilter()
48      {
49          this( "ProtocolThreadPool" );
50      }
51  
52      /***
53       * Creates a new instance of this filter with default thread pool settings.
54       * You'll have to invoke {@link #start()} method to start threads actually.
55       * 
56       * @param threadNamePrefix the prefix of the thread names this pool will create.
57       */
58      public ProtocolThreadPoolFilter( String threadNamePrefix )
59      {
60          super( threadNamePrefix );
61      }
62  
63      public void sessionOpened( NextFilter nextFilter,
64                                ProtocolSession session )
65      {
66          fireEvent( nextFilter, session, EventType.OPENED, null );
67      }
68  
69      public void sessionClosed( NextFilter nextFilter,
70                                ProtocolSession session )
71      {
72          fireEvent( nextFilter, session, EventType.CLOSED, null );
73      }
74  
75      public void sessionIdle( NextFilter nextFilter,
76                              ProtocolSession session, IdleStatus status )
77      {
78          fireEvent( nextFilter, session, EventType.IDLE, status );
79      }
80  
81      public void exceptionCaught( NextFilter nextFilter,
82                                  ProtocolSession session, Throwable cause )
83      {
84          fireEvent( nextFilter, session, EventType.EXCEPTION, cause );
85      }
86  
87      public void messageReceived( NextFilter nextFilter,
88                                  ProtocolSession session, Object message )
89      {
90          fireEvent( nextFilter, session, EventType.RECEIVED, message );
91      }
92  
93      public void messageSent( NextFilter nextFilter,
94                              ProtocolSession session, Object message )
95      {
96          fireEvent( nextFilter, session, EventType.SENT, message );
97      }
98  
99      protected void processEvent( Object nextFilter0,
100                                Session session0, EventType type,
101                                Object data )
102     {
103         NextFilter nextFilter = ( NextFilter ) nextFilter0;
104         ProtocolSession session = ( ProtocolSession ) session0;
105 
106         if( type == EventType.RECEIVED )
107         {
108             nextFilter.messageReceived( session, data );
109         }
110         else if( type == EventType.SENT )
111         {
112             nextFilter.messageSent( session, data );
113         }
114         else if( type == EventType.EXCEPTION )
115         {
116             nextFilter.exceptionCaught( session, ( Throwable ) data );
117         }
118         else if( type == EventType.IDLE )
119         {
120             nextFilter.sessionIdle( session, ( IdleStatus ) data );
121         }
122         else if( type == EventType.OPENED )
123         {
124             nextFilter.sessionOpened( session );
125         }
126         else if( type == EventType.CLOSED )
127         {
128             nextFilter.sessionClosed( session );
129         }
130     }
131 
132     public void filterWrite( NextFilter nextFilter, ProtocolSession session, Object message )
133     {
134         nextFilter.filterWrite( session, message );
135     }
136 }