Package com.sun.enterprise.server

Source Code of com.sun.enterprise.server.ExtendedApplicationLoader

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package com.sun.enterprise.server;

import com.sun.logging.LogDomains;
import com.sun.enterprise.config.ConfigException;
import com.sun.enterprise.config.serverbeans.J2eeApplication;
import com.sun.enterprise.deployment.Application;
import com.sun.enterprise.deployment.BundleDescriptor;
import com.sun.enterprise.deployment.WebBundleDescriptor;
import com.sun.enterprise.deployment.interfaces.pluggable.ArchiveLoader;
import com.sun.enterprise.deployment.interfaces.pluggable.ArchiveDescriptor;
import com.sun.enterprise.deployment.pluggable.PluggableDeploymentInfo;
import com.sun.enterprise.deployment.phasing.ExtensionModuleDeployer;
import com.sun.enterprise.instance.AppsManager;
import com.sun.enterprise.util.StringUtils;
import com.sun.enterprise.web.PEWebContainer;
import com.sun.enterprise.Switch;
import com.sun.enterprise.server.event.ApplicationEvent;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.logging.Logger;
import java.util.logging.Level;

import org.apache.catalina.Container;
import org.apache.catalina.Context;
import org.apache.catalina.Deployer;
import org.apache.catalina.Engine;
import org.apache.catalina.Host;
import org.apache.catalina.core.StandardHost;

/**
* This class extends TomcatApplicationLoader to handle
* per application loading/unloading of extension modules. 
*
* @author  prasad.subramanian@sun.com
*/
public class ExtendedApplicationLoader extends TomcatApplicationLoader {
    /** logger to log loader messages */
    static Logger _logger = LogDomains.getLogger(LogDomains.LOADER_LOGGER);
   
   
    // ------------------------------------------------------------ Constructor
   
    /**
     * ExtendedApplicationLoader loads one application.
     *
     * @param appID              the name of the application
     * @param parentClassLoader  parent class loader for this application
     * @param appsManager        the AppsManager for this VS
     */
    public ExtendedApplicationLoader(String appID, ClassLoader parentClassLoader,
            AppsManager appsManager) {

        super(appID, parentClassLoader, appsManager);
        _logger.log(Level.FINEST, "[ExtendedApplicationLoader] " + appID);
        this.appsManager = appsManager;
        // get the instance of WebContainer
        webContainer = PEWebContainer.getPEWebContainer();
        _logger.log(Level.FINEST, "PEWebContainer " + webContainer);

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


    /**
     *  The AppsManager for this VS
     *  save for unload() since super.unload() calls done()
     *  and clears this.configManager
     */
    private AppsManager appsManager = null;


    /**
     * The WebContainer instance.
     */
    private PEWebContainer webContainer = null;
   
   
   
    /**
     * Called from ApplicationManager. Called to load an application.
     * This loads the web modules of this application on top of
     * its super loader creating the EJB and MDB container.
     *
     * @return    true if all modules were loaded successfully
     */
    protected boolean doLoad(boolean jsr77) {

        _logger.log(Level.FINEST, "[ExtendedApplicationLoader] load " + jsr77);
        boolean deployed = false;
        try {
            deployed = super.doLoad(jsr77);
        } finally {
            if (! deployed)
               notifyEarLifecycleEvent(ApplicationEvent.APPLICATION_LOADFAIL);           
        }
       
        if (loadUnloadAction == Constants.LOAD_RAR || ! deployed) {
            return deployed;
        }
        _logger.log(Level.FINEST, "deployed "+deployed);
        if (deployed) {
            J2eeApplication[] j2eeAppBeans = appsManager.getAllApps();
            if (j2eeAppBeans != null) {
                for (int i = 0; i < j2eeAppBeans.length; i++) {
                    if (j2eeAppBeans[i].getName().equals(id)) {
                        _logger.log(Level.FINEST,
                                    "[ExtendedApplicationLoader] loadJ2EEAppWebModule with "+j2eeAppBeans[i]);
                        // get the Application object
                        ApplicationRegistry registry =
                                ApplicationRegistry.getInstance();
                        ClassLoader appLoader =
                                registry.getClassLoaderForApplication(id);
                        if (appLoader != null) {
                            Application appDesc =
                                    registry.getApplication(appLoader);
                           
                            //get the extn bundle descriptors
                            Set ebds = appDesc.getExtnBundleDescriptors();
                            BundleDescriptor descriptor = null;
                            // for each descriptor
                            for(Iterator itr =ebds.iterator(); itr.hasNext();) {
                                descriptor = (BundleDescriptor)itr.next();
                                if(!( descriptor instanceof BundleDescriptor)) {
                                    // throw an error
                                    continue;
                                }
                               
                                // get the implementation of the ArchiveLoader
                                ArchiveLoader loader =
                                                 getArchiveLoader(descriptor);
                                if(loader == null ) continue;
                               //if the loader extends the AppArchiveLoader then
                               // it can handle modules in an EAR
                               if(loader instanceof AppArchiveLoader) {
                                   // set the J2eeApplication bean                           
                                   ((AppArchiveLoader)loader).
                                            setJ2eeAppBean(j2eeAppBeans[i]);
                                   try {
                                       loader.load((ArchiveDescriptor)descriptor,
                                                                         false);
                                   } catch (Exception ex) {
                                       deployed = false;                                      
                                       unloadEjbs(jsr77)
                                       // log the exception
                                   }
                                  
                               } else {
                                  // We cannot load the module if the loader is
                                  // not expecting a module from an EAR
                                  continue;
                               }
                           }
                        }
                    }
                }
            }
        }
       
        if (deployed) {
            notifyEarLifecycleEvent(ApplicationEvent.AFTER_APPLICATION_LOAD);
        } else {
            notifyEarLifecycleEvent(ApplicationEvent.APPLICATION_LOADFAIL);
        }
       
        return deployed;
       
    }

       
    /**
     * Unloads this application.
     *
     * @return    true if all modules were removed successfully
     */
    protected boolean unload(boolean jsr77) {
        notifyEarLifecycleEvent(ApplicationEvent.BEFORE_APPLICATION_UNLOAD);
        if (loadUnloadAction == Constants.UNLOAD_RAR) {
            return super.unload(jsr77);
        }

        super.unloadWebserviceEndpoints(jsr77);

        Set ebds = null;
        J2eeApplication[] j2eeAppBeans = appsManager.getAllApps();       
        if (j2eeAppBeans != null) {
            for (int i = 0; i < j2eeAppBeans.length; i++) {
                if (j2eeAppBeans[i].getName().equals(id)) {
                   
                    _logger.log(Level.FINEST, "[TomcatApplicationLoader] unload "
                                               +id);
                    ebds = application.getExtnBundleDescriptors();
                    BundleDescriptor bd = null;
                    if ( ebds == null) continue;

                    Iterator itr = ebds.iterator();
                   
                    while (itr.hasNext()){
                        bd = (BundleDescriptor) itr.next();
                        ArchiveLoader archiveLoader = getArchiveLoader(bd);
                        if(archiveLoader instanceof AppArchiveLoader) {
                            ((AppArchiveLoader)archiveLoader).
                                                setJ2eeAppBean(j2eeAppBeans[i]);
                            ((AppArchiveLoader)archiveLoader).
                                                setAppsManager(appsManager);
                            try {
                                archiveLoader.unload((ArchiveDescriptor)bd,
                                                                        false);
                            } catch ( Exception ex) {
                                //log the exception
                            }
                        } else {
                            continue;
                        }
                      }

                }
            }   
        }

        return super.unload(jsr77);       
    }
   
    protected ArchiveLoader getArchiveLoader(BundleDescriptor descriptor) {
       
        ExtensionModuleDeployer extnModDeployer =
                             PluggableDeploymentInfo.getExtensionModuleDeployer(
                                                    descriptor.getModuleType());
        if(extnModDeployer != null) {
            return extnModDeployer.getExtensionLoader();
        } else {
            return null;
        }
    }
}
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