1 /* 2 * $Id: MuleContainerWrapper.java 20208 2010-11-17 14:33:40Z dirk.olmes $ 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.reboot; 12 13 import java.io.File; 14 import java.lang.reflect.Constructor; 15 import java.lang.reflect.Method; 16 17 import org.tanukisoftware.wrapper.WrapperListener; 18 import org.tanukisoftware.wrapper.WrapperManager; 19 20 public class MuleContainerWrapper implements WrapperListener 21 { 22 protected static final String CLASSNAME_MULE_CONTAINER = "org.mule.module.launcher.MuleContainer"; 23 24 /** 25 * We can't reference MuleContainer class literal here, as it will fail to resolve at runtime. 26 * Instead, make all calls anonymous through reflection, so we can safely pump up our new 27 * classloader and make it the default one for downstream applications. 28 */ 29 private Object mule; 30 31 /*--------------------------------------------------------------- 32 * WrapperListener Methods 33 *-------------------------------------------------------------*/ 34 /** 35 * The start method is called when the WrapperManager is signaled by the native 36 * wrapper code that it can start its application. This method call is expected 37 * to return, so a new thread should be launched if necessary. 38 * 39 * @param args List of arguments used to initialize the application. 40 * @return Any error code if the application should exit on completion of the 41 * start method. If there were no problems then this method should return 42 * null. 43 */ 44 public Integer start(String[] args) 45 { 46 try 47 { 48 ClassLoader muleSystemCl = createContainerSystemClassLoader(); 49 50 Thread.currentThread().setContextClassLoader(muleSystemCl); 51 52 Class<?> muleClass = Thread.currentThread().getContextClassLoader().loadClass(CLASSNAME_MULE_CONTAINER); 53 Constructor<?> c = muleClass.getConstructor(String[].class); 54 mule = c.newInstance(new Object[] {args}); 55 Method startMethod = muleClass.getMethod("start", boolean.class); 56 startMethod.invoke(mule, true); 57 return null; 58 } 59 catch (Exception e) 60 { 61 e.printStackTrace(); 62 return 1; 63 } 64 } 65 66 protected ClassLoader createContainerSystemClassLoader() throws Exception 67 { 68 File muleHome = MuleContainerBootstrap.lookupMuleHome(); 69 File muleBase = MuleContainerBootstrap.lookupMuleBase(); 70 DefaultMuleClassPathConfig config = new DefaultMuleClassPathConfig(muleHome, muleBase); 71 72 return new MuleContainerSystemClassLoader(config); 73 } 74 75 /** 76 * Called when the application is shutting down. The Wrapper assumes that this 77 * method will return fairly quickly. If the shutdown code code could potentially 78 * take a long time, then WrapperManager.signalStopping() should be called to 79 * extend the timeout period. If for some reason, the stop method can not return, 80 * then it must call WrapperManager.stopped() to avoid warning messages from the 81 * Wrapper. 82 * 83 * @param exitCode The suggested exit code that will be returned to the OS when 84 * the JVM exits. 85 * @return The exit code to actually return to the OS. In most cases, this should 86 * just be the value of exitCode, however the user code has the option of 87 * changing the exit code if there are any problems during shutdown. 88 */ 89 public int stop(int exitCode) 90 { 91 try 92 { 93 Method shutdownMethod = mule.getClass().getMethod("shutdown"); 94 shutdownMethod.invoke(mule); 95 } 96 catch (Throwable t) 97 { 98 // ignore 99 } 100 101 return exitCode; 102 } 103 104 /** 105 * Called whenever the native wrapper code traps a system control signal against 106 * the Java process. It is up to the callback to take any actions necessary. 107 * Possible values are: WrapperManager.WRAPPER_CTRL_C_EVENT, 108 * WRAPPER_CTRL_CLOSE_EVENT, WRAPPER_CTRL_LOGOFF_EVENT, or 109 * WRAPPER_CTRL_SHUTDOWN_EVENT 110 * 111 * @param event The system control signal. 112 */ 113 public void controlEvent(int event) 114 { 115 if (WrapperManager.isControlledByNativeWrapper()) 116 { 117 // The Wrapper will take care of this event 118 } 119 else 120 { 121 // We are not being controlled by the Wrapper, so 122 // handle the event ourselves. 123 if ((event == WrapperManager.WRAPPER_CTRL_C_EVENT) 124 || (event == WrapperManager.WRAPPER_CTRL_CLOSE_EVENT) 125 || (event == WrapperManager.WRAPPER_CTRL_SHUTDOWN_EVENT)) 126 { 127 WrapperManager.stop(0); 128 } 129 } 130 } 131 }