Package com.sun.enterprise.resource

Source Code of com.sun.enterprise.resource.CustomResourceDeployer

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/*
* @(#) CustomResourceDeployer.java
*
* Copyright 2000-2001 by iPlanet/Sun Microsystems, Inc.,
* 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
* All rights reserved.
*
* This software is the confidential and proprietary information
* of iPlanet/Sun Microsystems, Inc. ("Confidential Information").
* You shall not disclose such Confidential Information and shall
* use it only in accordance with the terms of the license
* agreement you entered into with iPlanet/Sun Microsystems.
*/
package com.sun.enterprise.resource;

import com.sun.enterprise.server.ResourceDeployer;
import com.sun.enterprise.config.serverbeans.Resources;

import com.sun.enterprise.Switch;
import com.sun.enterprise.NamingManager;
import com.sun.enterprise.repository.J2EEResource;
import com.sun.enterprise.repository.CustomResource;
import com.sun.enterprise.repository.IASJ2EEResourceFactoryImpl;

import java.util.logging.Logger;
import java.util.logging.Level;
import com.sun.logging.LogDomains;
import com.sun.enterprise.util.i18n.StringManager;

/**
* Handles custom resource events in the server instance.
*
* The custom resource events from the admin instance are propagated
* to this object.
*
* The methods can potentially be called concurrently, therefore implementation
* need to be synchronized.
*
* <P>
* Note: Since a notification is not sent to the user of the custom
*       resources upon undeploy, it is possible that there would be
*       stale objects not being garbage collected. Future versions
*       should take care of this problem.
*
* @author  Nazrul Islam
* @since   JDK1.4
*/
public class CustomResourceDeployer implements ResourceDeployer {

    /** Stringmanager for this deployer */
    private static final StringManager localStrings =
        StringManager.getManager("com.sun.enterprise.resource");

    /** logger for this deployer */
    private static Logger _logger=LogDomains.getLogger(LogDomains.CORE_LOGGER);

    /**
     * Deploy the resource into the server's runtime naming context
     *
     * @param resource a resource object (eg. JmsResource)
     * @exception Exception thrown if fail
     */
  public synchronized void deployResource(Object resource) throws Exception {
       
        com.sun.enterprise.config.serverbeans.CustomResource customRes =
            (com.sun.enterprise.config.serverbeans.CustomResource) resource;
       
        if (customRes.isEnabled()) {
            // converts the config data to j2ee resource
            J2EEResource j2eeResource =
                IASJ2EEResourceFactoryImpl.toCustomJ2EEResource(customRes);

            // resource installer
            ResourceInstaller installer =
                Switch.getSwitch().getResourceInstaller();

            // installs the resource
            installer.installCustomResource((CustomResource) j2eeResource);

            // adds the resource to the resource collection
            installer.addResource(j2eeResource);
        } else {
            _logger.log(Level.INFO, "core.resource_disabled",
                new Object[] {customRes.getJndiName(),
                              IASJ2EEResourceFactoryImpl.CUSTOM_RES_TYPE});
        }
    }

    /**
     * Undeploy the resource from the server's runtime naming context
     *
     * @param resource a resource object (eg. JmsResource)
     * @exception Exception thrown if fail
     */
  public synchronized void undeployResource(Object resource)
            throws Exception {

        // naming manager - provides jndi support
        NamingManager namingMgr = Switch.getSwitch().getNamingManager();

        com.sun.enterprise.config.serverbeans.CustomResource customRes =
            (com.sun.enterprise.config.serverbeans.CustomResource) resource;

        // converts the config data to j2ee resource
        J2EEResource j2eeResource =
            IASJ2EEResourceFactoryImpl.toCustomJ2EEResource(customRes);

        // removes the resource from jndi naming
        namingMgr.unpublishObject( j2eeResource.getName() );

        // resource installer
        ResourceInstaller installer = Switch.getSwitch().getResourceInstaller();

        // removes the resource from the collection
        installer.removeResource(j2eeResource);
    }

    /**
     * Redeploy the resource into the server's runtime naming context
     *
     * @param resource a resource object (eg. JmsResource)
     * @exception Exception thrown if fail
     */
  public synchronized void redeployResource(Object resource)
            throws Exception {

        undeployResource(resource);
        deployResource(resource);
    }

    /**
     * Enable the resource in the server's runtime naming context
     *
     * @param resource a resource object (eg. JmsResource)
     * @exception Exception thrown if fail
     */
  public synchronized void enableResource(Object resource) throws Exception {
        deployResource(resource);
    }

    /**
     * Disable the resource in the server's runtime naming context
     *
     * @param resource a resource object (eg. JmsResource)
     * @exception Exception thrown if fail
     */
  public synchronized void disableResource(Object resource) throws Exception {
        undeployResource(resource);
    }


  /**
   * Utility method to find a resource from Resources beans and converte
   * it to a resource object to be used by the implemented ResourceDeployer
   *
    * @param     name      resource name (normally the jndi-name)
   * @param     rbeans    Resources config-beans 
   * @exception Exception thrown if fail
   */
    public Object getResource(String name, Resources rbeans) throws Exception {

        Object res = rbeans.getCustomResourceByJndiName(name);

        if (res == null) {
            String msg = localStrings.getString(
                         "resource.no_resource",name);
            throw new Exception(msg);
        }

        return res;
    }
}
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