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1   /*
2    * $Id: MuleServerWrapper.java 20321 2010-11-24 15:21:24Z 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.module.boot;
12  
13  import java.lang.reflect.Constructor;
14  import java.lang.reflect.Method;
15  
16  import org.tanukisoftware.wrapper.WrapperListener;
17  import org.tanukisoftware.wrapper.WrapperManager;
18  
19  public class MuleServerWrapper implements WrapperListener
20  {
21  
22      /**
23       * We can't reference MuleServer class literal here, as it will fail to resolve at runtime.
24       * Instead, make all calls anonymous through reflection, so we can safely pump up our new classloader
25       * and make it the default one for downstream applications. 
26       */
27      private Object mule;
28  
29      /*---------------------------------------------------------------
30       * Constructors
31       *-------------------------------------------------------------*/
32      public MuleServerWrapper()
33      {
34          super();
35      }
36  
37      /*---------------------------------------------------------------
38       * WrapperListener Methods
39       *-------------------------------------------------------------*/
40      /**
41       * The start method is called when the WrapperManager is signaled by the native
42       * wrapper code that it can start its application. This method call is expected
43       * to return, so a new thread should be launched if necessary.
44       * 
45       * @param args List of arguments used to initialize the application.
46       * @return Any error code if the application should exit on completion of the
47       *         start method. If there were no problems then this method should return
48       *         null.
49       */
50      public Integer start(String[] args)
51      {
52          try
53          {
54              ClassLoader muleSystemCl = new MuleSystemClassLoader();
55  
56              Thread.currentThread().setContextClassLoader(muleSystemCl);
57  
58              Class muleClass = Thread.currentThread().getContextClassLoader().loadClass("org.mule.MuleServer");
59              Constructor c = muleClass.getConstructor(String[].class);
60              mule = c.newInstance(new Object[] {args});
61              Method startMethod = muleClass.getMethod("start", boolean.class, boolean.class);
62              startMethod.invoke(mule, false, false);
63              return null;
64          }
65          catch (Exception e)
66          {
67              e.printStackTrace();
68              return Integer.valueOf(1);
69          }
70      }
71  
72      /**
73       * Called when the application is shutting down. The Wrapper assumes that this
74       * method will return fairly quickly. If the shutdown code code could potentially
75       * take a long time, then WrapperManager.signalStopping() should be called to
76       * extend the timeout period. If for some reason, the stop method can not return,
77       * then it must call WrapperManager.stopped() to avoid warning messages from the
78       * Wrapper.
79       * 
80       * @param exitCode The suggested exit code that will be returned to the OS when
81       *            the JVM exits.
82       * @return The exit code to actually return to the OS. In most cases, this should
83       *         just be the value of exitCode, however the user code has the option of
84       *         changing the exit code if there are any problems during shutdown.
85       */
86      public int stop(int exitCode)
87      {
88          try
89          {
90              Method shutdownMethod = mule.getClass().getMethod("shutdown");
91              shutdownMethod.invoke(mule);
92          }
93          catch (Throwable t)
94          {
95              // ignore
96          }
97          
98          return exitCode;
99      }
100 
101     /**
102      * Called whenever the native wrapper code traps a system control signal against
103      * the Java process. It is up to the callback to take any actions necessary.
104      * Possible values are: WrapperManager.WRAPPER_CTRL_C_EVENT,
105      * WRAPPER_CTRL_CLOSE_EVENT, WRAPPER_CTRL_LOGOFF_EVENT, or
106      * WRAPPER_CTRL_SHUTDOWN_EVENT
107      * 
108      * @param event The system control signal.
109      */
110     public void controlEvent(int event)
111     {
112         if (WrapperManager.isControlledByNativeWrapper())
113         {
114             // The Wrapper will take care of this event
115         }
116         else
117         {
118             // We are not being controlled by the Wrapper, so
119             // handle the event ourselves.
120             if ((event == WrapperManager.WRAPPER_CTRL_C_EVENT)
121                 || (event == WrapperManager.WRAPPER_CTRL_CLOSE_EVENT)
122                 || (event == WrapperManager.WRAPPER_CTRL_SHUTDOWN_EVENT))
123             {
124                 WrapperManager.stop(0);
125             }
126         }
127     }
128 
129 }