Tomcat example source code file (NamingResources.java)

This example Tomcat source code file (NamingResources.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

bean, contextejb, contextenvironment, contextenvironment, contextlocalejb, contextresource, contextresourceenvref, contextresourcelink, contextresourcelink, contextservice, hashmap, hashmap, io, javabean, messagedestinationref, messagedestinationref, object, util

The Tomcat NamingResources.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.deploy;


import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.util.HashMap;
import java.util.Hashtable;
import java.io.Serializable;

import org.apache.catalina.ServerFactory;


/**
 * Holds and manages the naming resources defined in the J2EE Enterprise 
 * Naming Context and their associated JNDI context.
 *
 * @author Remy Maucherat
 * @version $Revision: 550048 $ $Date: 2007-06-23 17:00:51 +0200 (sam., 23 juin 2007) $
 */

public class NamingResources implements Serializable {


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


    /**
     * Create a new NamingResources instance.
     */
    public NamingResources() {
    }


    // ----------------------------------------------------- Instance Variables


    /**
     * Associated container object.
     */
    private Object container = null;


    /**
     * List of naming entries, keyed by name. The value is the entry type, as
     * declared by the user.
     */
    private Hashtable entries = new Hashtable();


    /**
     * The EJB resource references for this web application, keyed by name.
     */
    private HashMap ejbs = new HashMap();


    /**
     * The environment entries for this web application, keyed by name.
     */
    private HashMap envs = new HashMap();


    /**
     * The local  EJB resource references for this web application, keyed by
     * name.
     */
    private HashMap localEjbs = new HashMap();


    /**
     * The message destination referencess for this web application,
     * keyed by name.
     */
    private HashMap mdrs = new HashMap();


    /**
     * The resource environment references for this web application,
     * keyed by name.
     */
    private HashMap resourceEnvRefs = new HashMap();


    /**
     * The resource references for this web application, keyed by name.
     */
    private HashMap resources = new HashMap();


    /**
     * The resource links for this web application, keyed by name.
     */
    private HashMap resourceLinks = new HashMap();


    /**
     * The web service references for this web application, keyed by name.
     */
    private HashMap services = new HashMap();


    /**
     * The transaction for this webapp.
     */
    private ContextTransaction transaction = null;


    /**
     * The property change support for this component.
     */
    protected PropertyChangeSupport support = new PropertyChangeSupport(this);


    // ------------------------------------------------------------- Properties


    /**
     * Get the container with which the naming resources are associated.
     */
    public Object getContainer() {
        return container;
    }


    /**
     * Set the container with which the naming resources are associated.
     */
    public void setContainer(Object container) {
        this.container = container;
    }

    
    /**
     * Set the transaction object.
     */
    public void setTransaction(ContextTransaction transaction) {
        this.transaction = transaction;
    }
    

    /**
     * Get the transaction object.
     */
    public ContextTransaction getTransaction() {
        return transaction;
    }
    

    /**
     * Add an EJB resource reference for this web application.
     *
     * @param ejb New EJB resource reference
     */
    public void addEjb(ContextEjb ejb) {

        if (entries.containsKey(ejb.getName())) {
            return;
        } else {
            entries.put(ejb.getName(), ejb.getType());
        }

        synchronized (ejbs) {
            ejb.setNamingResources(this);
            ejbs.put(ejb.getName(), ejb);
        }
        support.firePropertyChange("ejb", null, ejb);

    }


    /**
     * Add an environment entry for this web application.
     *
     * @param environment New environment entry
     */
    public void addEnvironment(ContextEnvironment environment) {

        if (entries.containsKey(environment.getName())) {
            ContextEnvironment ce = findEnvironment(environment.getName());
            ContextResourceLink rl = findResourceLink(environment.getName());
            if (ce != null) {
                if (ce.getOverride()) {
                    removeEnvironment(environment.getName());
                } else {
                    return;
                }
            } else if (rl != null) {
                // Link. Need to look at the global resources
                NamingResources global =
                    ServerFactory.getServer().getGlobalNamingResources();
                if (global.findEnvironment(rl.getGlobal()) != null) {
                    if (global.findEnvironment(rl.getGlobal()).getOverride()) {
                        removeResourceLink(environment.getName());
                    } else {
                        return;
                    }
                }
            } else {
                // It exists but it isn't an env or a res link...
                return;
            }
        }
        
        entries.put(environment.getName(), environment.getType());

        synchronized (envs) {
            environment.setNamingResources(this);
            envs.put(environment.getName(), environment);
        }
        support.firePropertyChange("environment", null, environment);

    }


    /**
     * Add a local EJB resource reference for this web application.
     *
     * @param ejb New EJB resource reference
     */
    public void addLocalEjb(ContextLocalEjb ejb) {

        if (entries.containsKey(ejb.getName())) {
            return;
        } else {
            entries.put(ejb.getName(), ejb.getType());
        }

        synchronized (localEjbs) {
            ejb.setNamingResources(this);
            localEjbs.put(ejb.getName(), ejb);
        }
        support.firePropertyChange("localEjb", null, ejb);

    }


    /**
     * Add a message destination reference for this web application.
     *
     * @param mdr New message destination reference
     */
    public void addMessageDestinationRef(MessageDestinationRef mdr) {

        if (entries.containsKey(mdr.getName())) {
            return;
        } else {
            entries.put(mdr.getName(), mdr.getType());
        }

        synchronized (mdrs) {
            mdr.setNamingResources(this);
            mdrs.put(mdr.getName(), mdr);
        }
        support.firePropertyChange("messageDestinationRef", null, mdr);

    }


    /**
     * Add a property change listener to this component.
     *
     * @param listener The listener to add
     */
    public void addPropertyChangeListener(PropertyChangeListener listener) {

        support.addPropertyChangeListener(listener);

    }


    /**
     * Add a resource reference for this web application.
     *
     * @param resource New resource reference
     */
    public void addResource(ContextResource resource) {

        if (entries.containsKey(resource.getName())) {
            return;
        } else {
            entries.put(resource.getName(), resource.getType());
        }

        synchronized (resources) {
            resource.setNamingResources(this);
            resources.put(resource.getName(), resource);
        }
        support.firePropertyChange("resource", null, resource);

    }


    /**
     * Add a resource environment reference for this web application.
     *
     * @param resource The resource
     */
    public void addResourceEnvRef(ContextResourceEnvRef resource) {

        if (entries.containsKey(resource.getName())) {
            return;
        } else {
            entries.put(resource.getName(), resource.getType());
        }

        synchronized (localEjbs) {
            resource.setNamingResources(this);
            resourceEnvRefs.put(resource.getName(), resource);
        }
        support.firePropertyChange("resourceEnvRef", null, resource);

    }


    /**
     * Add a resource link for this web application.
     *
     * @param resourceLink New resource link
     */
    public void addResourceLink(ContextResourceLink resourceLink) {

        if (entries.containsKey(resourceLink.getName())) {
            return;
        } else {
            Object value = resourceLink.getType();
            if (value == null) {
                value = "";
            }
            entries.put(resourceLink.getName(), value);
        }

        synchronized (resourceLinks) {
            resourceLink.setNamingResources(this);
            resourceLinks.put(resourceLink.getName(), resourceLink);
        }
        support.firePropertyChange("resourceLink", null, resourceLink);

    }


    /**
     * Add a web service reference for this web application.
     *
     * @param service New web service reference
     */
    public void addService(ContextService service) {

        if (entries.containsKey(service.getName())) {
            return;
        } else {
            Object value = service.getType();
            if (value == null) {
                value = "";
            }
            entries.put(service.getName(), value);
        }
        
        synchronized (services) {
            service.setNamingResources(this);
            services.put(service.getName(), service);
        }
        support.firePropertyChange("service", null, service);
        
    }


    /**
     * Return the EJB resource reference with the specified name, if any;
     * otherwise, return <code>null.
     *
     * @param name Name of the desired EJB resource reference
     */
    public ContextEjb findEjb(String name) {

        synchronized (ejbs) {
            return ((ContextEjb) ejbs.get(name));
        }

    }


    /**
     * Return the defined EJB resource references for this application.
     * If there are none, a zero-length array is returned.
     */
    public ContextEjb[] findEjbs() {

        synchronized (ejbs) {
            ContextEjb results[] = new ContextEjb[ejbs.size()];
            return ((ContextEjb[]) ejbs.values().toArray(results));
        }

    }


    /**
     * Return the environment entry with the specified name, if any;
     * otherwise, return <code>null.
     *
     * @param name Name of the desired environment entry
     */
    public ContextEnvironment findEnvironment(String name) {

        synchronized (envs) {
            return ((ContextEnvironment) envs.get(name));
        }

    }


    /**
     * Return the set of defined environment entries for this web
     * application.  If none have been defined, a zero-length array
     * is returned.
     */
    public ContextEnvironment[] findEnvironments() {

        synchronized (envs) {
            ContextEnvironment results[] = new ContextEnvironment[envs.size()];
            return ((ContextEnvironment[]) envs.values().toArray(results));
        }

    }


    /**
     * Return the local EJB resource reference with the specified name, if any;
     * otherwise, return <code>null.
     *
     * @param name Name of the desired EJB resource reference
     */
    public ContextLocalEjb findLocalEjb(String name) {

        synchronized (localEjbs) {
            return ((ContextLocalEjb) localEjbs.get(name));
        }

    }


    /**
     * Return the defined local EJB resource references for this application.
     * If there are none, a zero-length array is returned.
     */
    public ContextLocalEjb[] findLocalEjbs() {

        synchronized (localEjbs) {
            ContextLocalEjb results[] = new ContextLocalEjb[localEjbs.size()];
            return ((ContextLocalEjb[]) localEjbs.values().toArray(results));
        }

    }


    /**
     * Return the message destination reference with the specified name,
     * if any; otherwise, return <code>null.
     *
     * @param name Name of the desired message destination reference
     */
    public MessageDestinationRef findMessageDestinationRef(String name) {

        synchronized (mdrs) {
            return ((MessageDestinationRef) mdrs.get(name));
        }

    }


    /**
     * Return the defined message destination references for this application.
     * If there are none, a zero-length array is returned.
     */
    public MessageDestinationRef[] findMessageDestinationRefs() {

        synchronized (mdrs) {
            MessageDestinationRef results[] =
                new MessageDestinationRef[mdrs.size()];
            return ((MessageDestinationRef[]) mdrs.values().toArray(results));
        }

    }


    /**
     * Return the resource reference with the specified name, if any;
     * otherwise return <code>null.
     *
     * @param name Name of the desired resource reference
     */
    public ContextResource findResource(String name) {

        synchronized (resources) {
            return ((ContextResource) resources.get(name));
        }

    }


    /**
     * Return the resource link with the specified name, if any;
     * otherwise return <code>null.
     *
     * @param name Name of the desired resource link
     */
    public ContextResourceLink findResourceLink(String name) {

        synchronized (resourceLinks) {
            return ((ContextResourceLink) resourceLinks.get(name));
        }

    }


    /**
     * Return the defined resource links for this application.  If
     * none have been defined, a zero-length array is returned.
     */
    public ContextResourceLink[] findResourceLinks() {

        synchronized (resourceLinks) {
            ContextResourceLink results[] = 
                new ContextResourceLink[resourceLinks.size()];
            return ((ContextResourceLink[]) resourceLinks.values()
                    .toArray(results));
        }

    }


    /**
     * Return the defined resource references for this application.  If
     * none have been defined, a zero-length array is returned.
     */
    public ContextResource[] findResources() {

        synchronized (resources) {
            ContextResource results[] = new ContextResource[resources.size()];
            return ((ContextResource[]) resources.values().toArray(results));
        }

    }


    /**
     * Return the resource environment reference type for the specified
     * name, if any; otherwise return <code>null.
     *
     * @param name Name of the desired resource environment reference
     */
    public ContextResourceEnvRef findResourceEnvRef(String name) {

        synchronized (resourceEnvRefs) {
            return ((ContextResourceEnvRef) resourceEnvRefs.get(name));
        }

    }


    /**
     * Return the set of resource environment reference names for this
     * web application.  If none have been specified, a zero-length
     * array is returned.
     */
    public ContextResourceEnvRef[] findResourceEnvRefs() {

        synchronized (resourceEnvRefs) {
            ContextResourceEnvRef results[] = new ContextResourceEnvRef[resourceEnvRefs.size()];
            return ((ContextResourceEnvRef[]) resourceEnvRefs.values().toArray(results));
        }

    }


    /**
     * Return the web service reference for the specified
     * name, if any; otherwise return <code>null.
     *
     * @param name Name of the desired web service
     */
    public ContextService findService(String name) {

        synchronized (services) {
            return ((ContextService) services.get(name));
        }

    }


    /**
     * Return the defined web service references for this application.  If
     * none have been defined, a zero-length array is returned.
     */
    public ContextService[] findServices() {
        
        synchronized (services) {
            ContextService results[] = new ContextService[services.size()];
            return ((ContextService[]) services.values().toArray(results));
        }
        
    }


    /**
     * Return true if the name specified already exists.
     */
    public boolean exists(String name) {

        return (entries.containsKey(name));

    }


    /**
     * Remove any EJB resource reference with the specified name.
     *
     * @param name Name of the EJB resource reference to remove
     */
    public void removeEjb(String name) {

        entries.remove(name);

        ContextEjb ejb = null;
        synchronized (ejbs) {
            ejb = (ContextEjb) ejbs.remove(name);
        }
        if (ejb != null) {
            support.firePropertyChange("ejb", ejb, null);
            ejb.setNamingResources(null);
        }

    }


    /**
     * Remove any environment entry with the specified name.
     *
     * @param name Name of the environment entry to remove
     */
    public void removeEnvironment(String name) {

        entries.remove(name);

        ContextEnvironment environment = null;
        synchronized (envs) {
            environment = (ContextEnvironment) envs.remove(name);
        }
        if (environment != null) {
            support.firePropertyChange("environment", environment, null);
            environment.setNamingResources(null);
        }

    }


    /**
     * Remove any local EJB resource reference with the specified name.
     *
     * @param name Name of the EJB resource reference to remove
     */
    public void removeLocalEjb(String name) {

        entries.remove(name);

        ContextLocalEjb localEjb = null;
        synchronized (localEjbs) {
            localEjb = (ContextLocalEjb) ejbs.remove(name);
        }
        if (localEjb != null) {
            support.firePropertyChange("localEjb", localEjb, null);
            localEjb.setNamingResources(null);
        }

    }


    /**
     * Remove any message destination reference with the specified name.
     *
     * @param name Name of the message destination resource reference to remove
     */
    public void removeMessageDestinationRef(String name) {

        entries.remove(name);

        MessageDestinationRef mdr = null;
        synchronized (mdrs) {
            mdr = (MessageDestinationRef) mdrs.remove(name);
        }
        if (mdr != null) {
            support.firePropertyChange("messageDestinationRef",
                                       mdr, null);
            mdr.setNamingResources(null);
        }

    }


    /**
     * Remove a property change listener from this component.
     *
     * @param listener The listener to remove
     */
    public void removePropertyChangeListener(PropertyChangeListener listener) {

        support.removePropertyChangeListener(listener);

    }


    /**
     * Remove any resource reference with the specified name.
     *
     * @param name Name of the resource reference to remove
     */
    public void removeResource(String name) {

        entries.remove(name);

        ContextResource resource = null;
        synchronized (resources) {
            resource = (ContextResource) resources.remove(name);
        }
        if (resource != null) {
            support.firePropertyChange("resource", resource, null);
            resource.setNamingResources(null);
        }

    }


    /**
     * Remove any resource environment reference with the specified name.
     *
     * @param name Name of the resource environment reference to remove
     */
    public void removeResourceEnvRef(String name) {

        entries.remove(name);

        String type = null;
        synchronized (resourceEnvRefs) {
            type = (String) resourceEnvRefs.remove(name);
        }
        if (type != null) {
            support.firePropertyChange("resourceEnvRef",
                                       name + ":" + type, null);
        }

    }


    /**
     * Remove any resource link with the specified name.
     *
     * @param name Name of the resource link to remove
     */
    public void removeResourceLink(String name) {

        entries.remove(name);

        ContextResourceLink resourceLink = null;
        synchronized (resourceLinks) {
            resourceLink = (ContextResourceLink) resourceLinks.remove(name);
        }
        if (resourceLink != null) {
            support.firePropertyChange("resourceLink", resourceLink, null);
            resourceLink.setNamingResources(null);
        }

    }


    /**
     * Remove any web service reference with the specified name.
     *
     * @param name Name of the web service reference to remove
     */
    public void removeService(String name) {
        
        entries.remove(name);
        
        ContextService service = null;
        synchronized (services) {
            service = (ContextService) services.remove(name);
        }
        if (service != null) {
            support.firePropertyChange("service", service, null);
            service.setNamingResources(null);
        }
        
    }


}