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From d...@apache.org
Subject cvs commit: incubator-geronimo/modules/kernel/src/java/org/apache/geronimo/kernel/deployment/task DeployGeronimoMBean.java
Date Tue, 11 Nov 2003 04:40:11 GMT
dain        2003/11/10 20:40:11

  Added:       modules/kernel/src/java/org/apache/geronimo/kernel/deployment/task
                        DeployGeronimoMBean.java
  Log:
  Initial revision of deployment task just for GeronimoMbeans
  
  Revision  Changes    Path
  1.1                  incubator-geronimo/modules/kernel/src/java/org/apache/geronimo/kernel/deployment/task/DeployGeronimoMBean.java
  
  Index: DeployGeronimoMBean.java
  ===================================================================
  /* ====================================================================
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2003 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution,
   *    if any, must include the following acknowledgment:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowledgment may appear in the software itself,
   *    if and wherever such third-party acknowledgments normally appear.
   *
   * 4. The names "Apache" and "Apache Software Foundation" and
   *    "Apache Geronimo" must not be used to endorse or promote products
   *    derived from this software without prior written permission. For
   *    written permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache",
   *    "Apache Geronimo", nor may "Apache" appear in their name, without
   *    prior written permission of the Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   * ====================================================================
   */
  package org.apache.geronimo.kernel.deployment.task;
  
  import java.net.URL;
  import javax.management.InstanceNotFoundException;
  import javax.management.MBeanException;
  import javax.management.MBeanRegistrationException;
  import javax.management.MBeanServer;
  import javax.management.ObjectName;
  import javax.management.ReflectionException;
  
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.apache.geronimo.kernel.classspace.ClassSpaceException;
  import org.apache.geronimo.kernel.classspace.ClassSpaceUtil;
  import org.apache.geronimo.kernel.deployment.DeploymentException;
  import org.apache.geronimo.kernel.deployment.service.MBeanMetadata;
  import org.apache.geronimo.kernel.service.GeronimoMBean;
  import org.apache.geronimo.kernel.service.GeronimoMBeanInfo;
  import org.apache.geronimo.kernel.service.GeronimoMBeanInfoXMLLoader;
  
  /**
   *
   *
   * @version $Revision: 1.1 $ $Date: 2003/11/11 04:40:11 $
   */
  public class DeployGeronimoMBean implements DeploymentTask {
      private static final Log log = LogFactory.getLog(DeployGeronimoMBean.class);
      private final MBeanServer server;
      private final MBeanMetadata metadata;
      private boolean registered;
  
      public DeployGeronimoMBean(MBeanServer server, MBeanMetadata mbeanMetadata) {
          this.server = server;
          this.metadata = mbeanMetadata;
      }
  
      public boolean canRun() throws DeploymentException {
          ObjectName loaderName = metadata.getLoaderName();
          if (loaderName != null && !server.isRegistered(loaderName)) {
              log.trace("Cannot run because class space is not registered: loaderName=" +
loaderName);
              return false;
          }
          return true;
      }
  
      public void perform() throws DeploymentException {
          ClassLoader oldCL = Thread.currentThread().getContextClassLoader();
          ClassLoader newCL;
  
          // create an MBean instance
          try {
              // Set the class loader
              try {
                  newCL = ClassSpaceUtil.setContextClassLoader(server, metadata.getLoaderName());
              } catch (ClassSpaceException e) {
                  throw new DeploymentException(e);
              }
  
              // Create and register the MBean
              try {
                  if (log.isTraceEnabled()) {
                      log.trace("Creating GeronimoMBean name=" + metadata.getName());
                  }
                  GeronimoMBean mbean = (GeronimoMBean) server.instantiate("org.apache.geronimo.kernel.service.GeronimoMBean");
                  mbean.setClassSpace(metadata.getLoaderName());
                  String descriptorName = metadata.getGeronimoMBeanDescriptor();
                  URL url = newCL.getResource(descriptorName);
                  if(url == null) {
                      throw new DeploymentException("GeronimoMBean descriptor not found: "
+ descriptorName);
                  }
                  GeronimoMBeanInfo geronimoMBeanInfo = GeronimoMBeanInfoXMLLoader.loadMBean(url);
                  mbean.setMBeanInfo(geronimoMBeanInfo);
                  server.registerMBean(mbean, metadata.getName());
                  registered = true;
  
                  // Add the mbean to it's parent
                  ObjectName parentName = metadata.getParentName();
                  if (parentName != null) {
                      server.invoke(metadata.getParentName(), "addChild", new Object[]{metadata.getName()},
new String[]{"javax.management.ObjectName"});
                  }
              } catch (Exception e) {
                  throw new DeploymentException(e, metadata);
              }
          } catch (DeploymentException e) {
              undo();
              throw e;
          } finally {
              Thread.currentThread().setContextClassLoader(oldCL);
          }
      }
  
  
      public void undo() {
          if (!registered) {
              return;
          }
          ObjectName objectName = metadata.getName();
          ClassLoader oldCL = Thread.currentThread().getContextClassLoader();
          try {
              // Set the class loader
              try {
                  ClassSpaceUtil.setContextClassLoader(server, metadata.getLoaderName());
              } catch (ClassSpaceException e) {
                  log.warn("Could not set context class loader", e);
                  return;
              }
  
              try {
                  server.invoke(metadata.getParentName(), "removeChild", new Object[]{objectName},
new String[]{"javax.management.ObjectName"});
              } catch (InstanceNotFoundException e) {
                  log.warn("Could not remove from parent", e);
              } catch (MBeanException e) {
                  log.error("Error while removing MBean " + objectName + " from parent", e);
              } catch (ReflectionException e) {
                  log.error("Error while removing MBean " + objectName + " from parent", e);
              }
  
              try {
                  server.unregisterMBean(objectName);
              } catch (InstanceNotFoundException e) {
                  log.warn("MBean was already removed " + objectName, e);
                  return;
              } catch (MBeanRegistrationException e) {
                  log.error("Error while unregistering MBean " + objectName, e);
              }
          } finally {
              Thread.currentThread().setContextClassLoader(oldCL);
          }
      }
  
      public String toString() {
          return "DeployGeronimoMBean " + metadata.getName();
      }
  }
  
  
  

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