Java tutorial
/* * $Header: /home/cvs/jakarta-tomcat-4.0/catalina/src/share/org/apache/catalina/mbeans/DefaultContextMBean.java,v 1.2 2002/09/13 01:35:22 amyroh Exp $ * $Revision: 1.2 $ * $Date: 2002/09/13 01:35:22 $ * * ==================================================================== * * The Apache Software License, Version 1.1 * * Copyright (c) 1999 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. 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For more * information on the Apache Software Foundation, please see * <http://www.apache.org/>. * * [Additional notices, if required by prior licensing conditions] * */ package catalina.mbeans; import java.net.URLDecoder; import java.util.ArrayList; import javax.management.MalformedObjectNameException; import javax.management.MBeanException; import javax.management.ObjectName; import javax.management.RuntimeOperationsException; import org.apache.catalina.core.StandardDefaultContext; import org.apache.catalina.deploy.ContextEnvironment; import org.apache.catalina.deploy.ContextResource; import org.apache.catalina.deploy.ContextResourceLink; import org.apache.catalina.deploy.NamingResources; import org.apache.commons.modeler.BaseModelMBean; import org.apache.commons.modeler.ManagedBean; import org.apache.commons.modeler.Registry; /** * <p>A <strong>ModelMBean</strong> implementation for the * <code>org.apache.catalina.core.StandardDefaultContext</code> component.</p> * * @author Amy Roh * @version $Revision: 1.2 $ $Date: 2002/09/13 01:35:22 $ */ public class DefaultContextMBean extends BaseModelMBean { // ----------------------------------------------------------- Constructors /** * Construct a <code>ModelMBean</code> with default * <code>ModelMBeanInfo</code> information. * * @exception MBeanException if the initializer of an object * throws an exception * @exception RuntimeOperationsException if an IllegalArgumentException * occurs */ public DefaultContextMBean() throws MBeanException, RuntimeOperationsException { super(); } // ----------------------------------------------------- Instance Variables /** * The configuration information registry for our managed beans. */ protected Registry registry = MBeanUtils.createRegistry(); /** * The <code>ManagedBean</code> information describing this MBean. */ protected ManagedBean managed = registry.findManagedBean("DefaultContext"); // ------------------------------------------------------------- Attributes /** * Return the naming resources associated with this web application. */ private NamingResources getNamingResources() { return ((StandardDefaultContext) this.resource).getNamingResources(); } /** * Return the MBean Names of the set of defined environment entries for * this web application */ public String[] getEnvironments() { ContextEnvironment[] envs = getNamingResources().findEnvironments(); ArrayList results = new ArrayList(); for (int i = 0; i < envs.length; i++) { try { ObjectName oname = MBeanUtils.createObjectName(managed.getDomain(), envs[i]); results.add(oname.toString()); } catch (MalformedObjectNameException e) { throw new IllegalArgumentException("Cannot create object name for environment " + envs[i]); } } return ((String[]) results.toArray(new String[results.size()])); } /** * Return the MBean Names of all the defined resource references for this * application. */ public String[] getResources() { ContextResource[] resources = getNamingResources().findResources(); ArrayList results = new ArrayList(); for (int i = 0; i < resources.length; i++) { try { ObjectName oname = MBeanUtils.createObjectName(managed.getDomain(), resources[i]); results.add(oname.toString()); } catch (MalformedObjectNameException e) { throw new IllegalArgumentException("Cannot create object name for resource " + resources[i]); } } return ((String[]) results.toArray(new String[results.size()])); } /** * Return the MBean Names of all the defined resource links for this * application */ public String[] getResourceLinks() { ContextResourceLink[] links = getNamingResources().findResourceLinks(); ArrayList results = new ArrayList(); for (int i = 0; i < links.length; i++) { try { ObjectName oname = MBeanUtils.createObjectName(managed.getDomain(), links[i]); results.add(oname.toString()); } catch (MalformedObjectNameException e) { throw new IllegalArgumentException("Cannot create object name for resource " + links[i]); } } return ((String[]) results.toArray(new String[results.size()])); } // ------------------------------------------------------------- Operations /** * Add an environment entry for this web application. * * @param envName New environment entry name */ public String addEnvironment(String envName, String type) throws MalformedObjectNameException { NamingResources nresources = getNamingResources(); if (nresources == null) { return null; } ContextEnvironment env = nresources.findEnvironment(envName); if (env != null) { throw new IllegalArgumentException("Invalid environment name - already exists '" + envName + "'"); } env = new ContextEnvironment(); env.setName(envName); env.setType(type); nresources.addEnvironment(env); // Return the corresponding MBean name ManagedBean managed = registry.findManagedBean("ContextEnvironment"); ObjectName oname = MBeanUtils.createObjectName(managed.getDomain(), env); return (oname.toString()); } /** * Add a resource reference for this web application. * * @param resourceName New resource reference name */ public String addResource(String resourceName, String type) throws MalformedObjectNameException { NamingResources nresources = getNamingResources(); if (nresources == null) { return null; } ContextResource resource = nresources.findResource(resourceName); if (resource != null) { throw new IllegalArgumentException("Invalid resource name - already exists'" + resourceName + "'"); } resource = new ContextResource(); resource.setName(resourceName); resource.setType(type); nresources.addResource(resource); // Return the corresponding MBean name ManagedBean managed = registry.findManagedBean("ContextResource"); ObjectName oname = MBeanUtils.createObjectName(managed.getDomain(), resource); return (oname.toString()); } /** * Add a resource link for this web application. * * @param resourceLinkName New resource link name */ public String addResourceLink(String resourceLinkName, String global, String name, String type) throws MalformedObjectNameException { NamingResources nresources = getNamingResources(); if (nresources == null) { return null; } ContextResourceLink resourceLink = nresources.findResourceLink(resourceLinkName); if (resourceLink != null) { throw new IllegalArgumentException( "Invalid resource link name - already exists'" + resourceLinkName + "'"); } resourceLink = new ContextResourceLink(); resourceLink.setGlobal(global); resourceLink.setName(resourceLinkName); resourceLink.setType(type); nresources.addResourceLink(resourceLink); // Return the corresponding MBean name ManagedBean managed = registry.findManagedBean("ContextResourceLink"); ObjectName oname = MBeanUtils.createObjectName(managed.getDomain(), resourceLink); return (oname.toString()); } /** * Remove any environment entry with the specified name. * * @param name Name of the environment entry to remove */ public void removeEnvironment(String envName) { NamingResources nresources = getNamingResources(); if (nresources == null) { return; } ContextEnvironment env = nresources.findEnvironment(envName); if (env == null) { throw new IllegalArgumentException("Invalid environment name '" + envName + "'"); } nresources.removeEnvironment(envName); } /** * Remove any resource reference with the specified name. * * @param resourceName Name of the resource reference to remove */ public void removeResource(String resourceName) { resourceName = URLDecoder.decode(resourceName); NamingResources nresources = getNamingResources(); if (nresources == null) { return; } ContextResource resource = nresources.findResource(resourceName); if (resource == null) { throw new IllegalArgumentException("Invalid resource name '" + resourceName + "'"); } nresources.removeResource(resourceName); } /** * Remove any resource link with the specified name. * * @param resourceName Name of the resource reference to remove */ public void removeResourceLink(String resourceLinkName) { resourceLinkName = URLDecoder.decode(resourceLinkName); NamingResources nresources = getNamingResources(); if (nresources == null) { return; } ContextResourceLink resource = nresources.findResourceLink(resourceLinkName); if (resource == null) { throw new IllegalArgumentException("Invalid resource name '" + resourceLinkName + "'"); } nresources.removeResourceLink(resourceLinkName); } }