Tomcat example source code file (NamingResourcesMBean.java)

This example Tomcat source code file (NamingResourcesMBean.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Tomcat tags/keywords

arraylist, arraylist, contextenvironment, contextresource, contextresourcelink, illegalargumentexception, illegalargumentexception, invalid, malformedobjectnameexception, management, namingresources, namingresources, objectname, string, string, util

The Tomcat NamingResourcesMBean.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.catalina.mbeans;

import java.util.ArrayList;

import javax.management.MBeanException;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import javax.management.RuntimeOperationsException;

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.tomcat.util.modeler.BaseModelMBean;
import org.apache.tomcat.util.modeler.ManagedBean;
import org.apache.tomcat.util.modeler.Registry;

/**
 * <p>A ModelMBean implementation for the
 * <code>org.apache.catalina.deploy.NamingResources component.

 *
 * @author Amy Roh
 * @version $Revision: 467222 $ $Date: 2006-10-24 05:17:11 +0200 (mar., 24 oct. 2006) $
 */

public class NamingResourcesMBean extends BaseModelMBean {


    // ----------------------------------------------------------- Constructors


    /**
     * Construct a <code>ModelMBean with default
     * <code>ModelMBeanInfo information.
     *
     * @exception MBeanException if the initializer of an object
     *  throws an exception
     * @exception RuntimeOperationsException if an IllegalArgumentException
     *  occurs
     */
    public NamingResourcesMBean()
        throws MBeanException, RuntimeOperationsException {

        super();

    }


    // ----------------------------------------------------- Instance Variables
    
    /**
     * The configuration information registry for our managed beans.
     */
    protected Registry registry = MBeanUtils.createRegistry();


    /**
     * The <code>ManagedBean information describing this MBean.
     */
    protected ManagedBean managed =
        registry.findManagedBean("NamingResources");

    // ------------------------------------------------------------- Attributes
    

    /**
     * Return the MBean Names of the set of defined environment entries for  
     * this web application
     */
    public String[] getEnvironments() {
        ContextEnvironment[] envs = 
                            ((NamingResources)this.resource).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) {
                IllegalArgumentException iae = new IllegalArgumentException
                    ("Cannot create object name for environment " + envs[i]);
                iae.initCause(e);
                throw iae;
            }
        }
        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 = 
                            ((NamingResources)this.resource).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) {
                IllegalArgumentException iae = new IllegalArgumentException
                    ("Cannot create object name for resource " + resources[i]);
                iae.initCause(e);
                throw iae;
            }
        }
        return ((String[]) results.toArray(new String[results.size()]));

    }
    
    
    /**
     * Return the MBean Names of all the defined resource link references for 
     * this application.
     */
    public String[] getResourceLinks() {
        
        ContextResourceLink[] resourceLinks = 
                            ((NamingResources)this.resource).findResourceLinks();
        ArrayList results = new ArrayList();
        for (int i = 0; i < resourceLinks.length; i++) {
            try {
                ObjectName oname =
                    MBeanUtils.createObjectName(managed.getDomain(), resourceLinks[i]);
                results.add(oname.toString());
            } catch (MalformedObjectNameException e) {
                IllegalArgumentException iae = new IllegalArgumentException
                    ("Cannot create object name for resource " + resourceLinks[i]);
                iae.initCause(e);
                throw iae;
            }
        }
        return ((String[]) results.toArray(new String[results.size()]));

    }

    // ------------------------------------------------------------- Operations


    /**
     * Add an environment entry for this web application.
     *
     * @param envName New environment entry name
     * @param type The type of the new environment entry
     * @param value The value of the new environment entry 
     */
    public String addEnvironment(String envName, String type, String value) 
        throws MalformedObjectNameException {

        NamingResources nresources = (NamingResources) this.resource;
        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);
        env.setValue(value);
        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
     * @param type New resource reference type
     */
    public String addResource(String resourceName, String type) 
        throws MalformedObjectNameException {
        
        NamingResources nresources = (NamingResources) this.resource;
        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 reference for this web application.
     *
     * @param resourceLinkName New resource link reference name
     * @param type New resource link reference type
     */
    public String addResourceLink(String resourceLinkName, String type)
        throws MalformedObjectNameException {
        
        NamingResources nresources = (NamingResources) this.resource;
        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.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 envName Name of the environment entry to remove
     */
    public void removeEnvironment(String envName) {

        NamingResources nresources = (NamingResources) this.resource;
        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 = ObjectName.unquote(resourceName);
        NamingResources nresources = (NamingResources) this.resource;
        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 reference with the specified name.
     *
     * @param resourceLinkName Name of the resource link reference to remove
     */
    public void removeResourceLink(String resourceLinkName) {

        resourceLinkName = ObjectName.unquote(resourceLinkName);
        NamingResources nresources = (NamingResources) this.resource;
        if (nresources == null) {
            return;
        }
        ContextResourceLink resourceLink = 
                            nresources.findResourceLink(resourceLinkName);
        if (resourceLink == null) {
            throw new IllegalArgumentException
                ("Invalid resource Link name '" + resourceLinkName + "'");
        }
        nresources.removeResourceLink(resourceLinkName);
    }

}