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1   /*
2    * $Id: JdbcMessageDispatcher.java 22156 2011-06-08 21:36:30Z dfeist $
3    * --------------------------------------------------------------------------------------
4    * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
5    *
6    * The software in this package is published under the terms of the CPAL v1.0
7    * license, a copy of which has been included with this distribution in the
8    * LICENSE.txt file.
9    */
10  
11  package org.mule.transport.jdbc;
12  
13  import org.mule.api.MuleEvent;
14  import org.mule.api.MuleMessage;
15  import org.mule.api.endpoint.OutboundEndpoint;
16  import org.mule.transport.AbstractMessageDispatcher;
17  import org.mule.transport.jdbc.sqlstrategy.SqlStatementStrategy;
18  
19  import org.apache.commons.logging.Log;
20  import org.apache.commons.logging.LogFactory;
21  
22  /**
23   * The Jdbc Message dispatcher is responsible for executing SQL queries against a
24   * database.
25   */
26  public class JdbcMessageDispatcher extends AbstractMessageDispatcher
27  {
28  
29      protected static Log staticLogger = LogFactory.getLog(AbstractMessageDispatcher.class);
30  
31      protected JdbcConnector connector;
32  
33      public JdbcMessageDispatcher(OutboundEndpoint endpoint)
34      {
35          super(endpoint);
36          this.connector = (JdbcConnector) endpoint.getConnector();
37      }
38  
39      @Override
40      protected void doDispose()
41      {
42          // template method
43      } 
44      
45      @Override
46      protected void doDispatch(MuleEvent event) throws Exception
47      {
48          if (logger.isDebugEnabled())
49          {
50              logger.debug("Dispatch event: " + event);
51          }
52          
53          doSend(event);
54      }
55  
56      @Override
57      protected MuleMessage doSend(MuleEvent event) throws Exception
58      {
59          // Use a strategy pattern to choose a particular strategy to handle the SQL request
60          JdbcConnector jdbcConnector = (JdbcConnector) endpoint.getConnector();
61          String statement = jdbcConnector.getStatement(endpoint);
62          Object payload = event.getMessage().getPayload();
63          
64          SqlStatementStrategy strategy = 
65              jdbcConnector.getSqlStatementStrategyFactory().create(statement, payload);
66          return strategy.executeStatement(jdbcConnector, endpoint, event, event.getTimeout());
67      }
68  
69      @Override
70      protected void doConnect() throws Exception
71      {
72          // template method
73      }
74  
75      @Override
76      protected void doDisconnect() throws Exception
77      {
78          // template method
79      }
80  }