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package org.glassfish.javaee.full.deployment;

import org.glassfish.api.deployment.*;
import org.glassfish.api.deployment.archive.ReadableArchive;
import org.glassfish.api.deployment.archive.ArchiveHandler;
import org.glassfish.api.container.Container;
import org.glassfish.api.ActionReport;
import org.glassfish.api.event.Events;
import org.glassfish.api.admin.*;
import org.glassfish.api.container.Sniffer;
import org.glassfish.deployment.common.*;
import org.glassfish.internal.deployment.Deployment;
import org.glassfish.internal.deployment.ExtendedDeploymentContext;
import org.glassfish.internal.data.*;
import org.glassfish.internal.deployment.SnifferManager;
import org.glassfish.hk2.classmodel.reflect.*;
import org.jvnet.hk2.annotations.Service;
import javax.inject.Inject;

import org.glassfish.hk2.api.PerLookup;
import com.sun.enterprise.deployment.*;
import com.sun.enterprise.deployment.util.DOLUtils;
import org.glassfish.deployment.common.ModuleDescriptor;
import org.glassfish.api.deployment.archive.ArchiveType;
import com.sun.enterprise.deploy.shared.ArchiveFactory;
import com.sun.enterprise.deployment.deploy.shared.Util;
import com.sun.enterprise.util.LocalStringManagerImpl;

import java.util.*;
import java.util.logging.Logger;
import java.util.logging.Level;
import java.io.IOException;
import java.io.File;
import java.net.URI;

import org.glassfish.logging.annotation.LogMessageInfo;
import org.glassfish.logging.annotation.LoggerInfo;
import org.glassfish.logging.annotation.LogMessagesResourceBundle;

/**
 * EarDeployer to deploy composite Java EE applications.
 * todo : could be generified into any composite applications.
 *
 * @author Jerome Dochez
 */
@Service
@PerLookup
public class EarDeployer implements Deployer {

//    private static final Class GLASSFISH_APPCLIENT_GROUP_FACADE_CLASS =
//            org.glassfish.appclient.client.AppClientGroupFacade.class;
// Currently using a string instead of a Class constant to avoid a circular
// dependency.  
    @Inject
    Deployment deployment;

    @Inject
    ServerEnvironment env;

    @Inject
    ApplicationRegistry appRegistry;

    @Inject
    protected SnifferManager snifferManager;

    @Inject
    ArchiveFactory archiveFactory;

    @Inject
    Events events;

    @LogMessagesResourceBundle
    private static final String SHARED_LOGMESSAGE_RESOURCE = "org.glassfish.deployment.LogMessages";

    // Reserve this range [AS-DEPLOYMENT-02001, AS-DEPLOYMENT-04000]
    // for message ids used in this deployment javaee-full module
    @LoggerInfo(subsystem = "DEPLOYMENT", description="Deployment logger for javaee-full module", publish=true)
    private static final String DEPLOYMENT_LOGGER = "javax.enterprise.system.tools.deployment.javaeefull";

    public static final Logger deplLogger =
        Logger.getLogger(DEPLOYMENT_LOGGER, SHARED_LOGMESSAGE_RESOURCE);

    @LogMessageInfo(message = "Skipped processing for module {0} as its module type was not recognized", level="WARNING")
    private static final String UNRECOGNIZED_MODULE_TYPE = "AS-DEPLOYMENT-02015";

    @LogMessageInfo(message = "Error occurred", level="WARNING")
    private static final String ERROR_OCCURRED = "AS-DEPLOYMENT-02016";

    final private static LocalStringManagerImpl localStrings = new LocalStringManagerImpl(EarDeployer.class);

    public MetaData getMetaData() {
        return new MetaData(false, null, new Class[] { Application.class});
    }

    public Object loadMetaData(Class type, DeploymentContext context) {
        return null;
    }

    public boolean prepare(final DeploymentContext context) {

        final Application application = context.getModuleMetaData(Application.class);

        DeployCommandParameters deployParams = context.getCommandParameters(DeployCommandParameters.class);
        final String appName = deployParams.name();
        
        final ApplicationInfo appInfo = new CompositeApplicationInfo(events, application, context.getSource(), appName);
        for (Object m : context.getModuleMetadata()) {
            appInfo.addMetaData(m);
        }

        try {
            doOnAllBundles(application, new BundleBlock() {
                public ModuleInfo doBundle(ModuleDescriptor bundle) throws Exception {
                    ExtendedDeploymentContext sContext = subContext(application, context, bundle.getArchiveUri());
                    ModuleInfo info = prepareBundle(bundle, application, 
                        sContext);
                    if (info == null) {
                        sContext.getActionReport().setActionExitCode(ActionReport.ExitCode.WARNING);
                        String msg = localStrings.getLocalString("skipmoduleprocessing", "Skipped processing for module {0} as its module type was not recognized", bundle.getArchiveUri());
                        sContext.getActionReport().setMessage(msg);
                        deplLogger.log(Level.WARNING,
                                       UNRECOGNIZED_MODULE_TYPE,
                                       bundle.getArchiveUri());
                        return null;
                    }
                    info.addMetaData(application);
                    BundleDescriptor bundleDesc = application.getModuleByUri(
                        bundle.getArchiveUri());
                    info.addMetaData(bundleDesc);
                    for (RootDeploymentDescriptor ext : 
                        bundleDesc.getExtensionsDescriptors()) {
                        info.addMetaData(ext);
                    }
                    appInfo.addModule(info);
                    return info;
                }

            });
        } catch(DeploymentException dde) {
            throw dde;
        } catch(Exception e) {
            DeploymentException de = new DeploymentException(e.getMessage());
            de.initCause(e);
            throw de;
        }

        context.getSource().removeExtraData(Hashtable.class);
        context.addModuleMetaData(appInfo);
        generateArtifacts(context);
        return true;
    }

    protected void generateArtifacts(final DeploymentContext context) throws DeploymentException {
        /*
         * The EAR-level app client artifact - the app client group facade -
         * is generated the first time an app client facade is generated.  At
         * that time all other deployers have run so any client artifacts
         * they create will be available and can be packaged into the group
         * facade.
         */
    }
        
    
    private class CompositeApplicationInfo extends ApplicationInfo {

        final Application application;

        private CompositeApplicationInfo(Events events, Application application, ReadableArchive source, String name) {
            super(events, source, name);
            this.application = application;
        }

        @Override
        protected ExtendedDeploymentContext getSubContext(ModuleInfo module, ExtendedDeploymentContext context) {
            return subContext(application, context, module.getName());
        }

     }


    /**
     * Performs the same runnable task on each specified bundle.
     *
     * @param bundles the bundles on which to perform the task
     * @param runnable the task to perform
     * @throws Exception
     */
    private void doOnBundles(
            final Collection> bundles,
            final BundleBlock runnable) throws Exception {
        for (ModuleDescriptor module : bundles) {
            runnable.doBundle(module);
        }
    }

    private Collection>
                doOnAllTypedBundles(Application application, ArchiveType type, BundleBlock runnable)
                    throws Exception {

        final Collection> typedBundles = application.getModuleDescriptorsByType(type);
        doOnBundles(typedBundles, runnable);
        return typedBundles;
    }

    private void doOnAllBundles(Application application, BundleBlock runnable) throws Exception {

        Collection bundles = 
            new LinkedHashSet();
        bundles.addAll(application.getModules());

        // if the initialize-in-order flag is set
        // we load the modules by their declaration order in application.xml
        if (application.isInitializeInOrder()) {
            for (final ModuleDescriptor bundle : bundles) {
                runnable.doBundle(bundle);
            }
        }
        
        // otherwise we load modules by default order: connector, ejb, web and
        // saving app client for last (because other submodules might generated
        // artifacts that should be included in the generated app client JAR
        else {
            // first we take care of the connectors
            bundles.removeAll(doOnAllTypedBundles(application, DOLUtils.rarType(), runnable));

            // now the EJBs
            bundles.removeAll(doOnAllTypedBundles(application, DOLUtils.ejbType(), runnable));

            // finally the war files.
            bundles.removeAll(doOnAllTypedBundles(application, DOLUtils.warType(), runnable));

            // extract the app client bundles to take care of later
            Collection> appClientBundles =
                    application.getModuleDescriptorsByType(DOLUtils.carType());
            bundles.removeAll(appClientBundles);
            
            // now ther remaining bundles
            for (final ModuleDescriptor bundle : bundles) {
                runnable.doBundle(bundle);
            }

            // Last, deal with the app client bundles
            doOnBundles(appClientBundles, runnable);
        } 
    }

    private ModuleInfo prepareBundle(final ModuleDescriptor md, Application application, final ExtendedDeploymentContext bundleContext)
        throws Exception {

        List orderedContainers = null;

        ProgressTracker tracker = bundleContext.getTransientAppMetaData(ExtendedDeploymentContext.TRACKER, ProgressTracker.class);

        try {
            // let's get the previously stored list of sniffers
            Hashtable> sniffersTable = bundleContext.getSource().getParentArchive().getExtraData(Hashtable.class);
            Collection sniffers = sniffersTable.get(md.getArchiveUri());
            // let's get the list of containers interested in this module
            orderedContainers = deployment.setupContainerInfos(null, sniffers, bundleContext);
            if (orderedContainers == null) {
                return null;
            }
        } catch(Exception e) {
            deplLogger.log(Level.WARNING,
                           ERROR_OCCURRED,
                           e);  
            throw e;
        }
        return deployment.prepareModule(orderedContainers, md.getArchiveUri(), bundleContext, tracker);
    }

    public ApplicationContainer load(Container container, DeploymentContext context) {

        return new DummyApplication();
    }

    public void unload(ApplicationContainer appContainer, DeploymentContext context) {
        // nothing to do
    }

    public void clean(DeploymentContext context) {
        // nothing to do
    }

    private interface BundleBlock {

        public T doBundle(ModuleDescriptor bundle) throws Exception;
    }
    
    private ExtendedDeploymentContext subContext(final Application application, final DeploymentContext context, final String moduleUri) {
                
                ExtendedDeploymentContext moduleContext = ((ExtendedDeploymentContext)context).getModuleDeploymentContexts().get(moduleUri);
                if (moduleContext != null) {
                    return moduleContext;
                }


                final ReadableArchive subArchive;
                try {
                    subArchive = context.getSource().getSubArchive(moduleUri);
                    subArchive.setParentArchive(context.getSource());
                } catch(IOException ioe) {
                    deplLogger.log(Level.WARNING,
                                   ERROR_OCCURRED,
                                   ioe);  
                    return null;
                }
                
                final Properties moduleProps = 
                    getModuleProps(context, moduleUri);

                ActionReport subReport = 
                    context.getActionReport().addSubActionsReport();
                moduleContext = new DeploymentContextImpl(subReport, context.getSource(),
                        context.getCommandParameters(OpsParams.class), env) {

                    @Override
                    public ClassLoader getClassLoader() {
                        try {
                            if (context.getClassLoader() == null) { 
                                return null;
                            }
                            EarClassLoader appCl = EarClassLoader.class.cast(context.getClassLoader());
                            if (((ExtendedDeploymentContext)context).
                                getPhase() == Phase.PREPARE) {
                                return appCl;
                            } else {
                                return appCl.getModuleClassLoader(moduleUri);
                            }
                        } catch (ClassCastException e) {
                            return context.getClassLoader();
                        }                        
                    }

                    @Override
                    public ClassLoader getFinalClassLoader() {
                        try {
                            EarClassLoader finalEarCL = (EarClassLoader) context.getFinalClassLoader();
                            return finalEarCL.getModuleClassLoader(moduleUri);
                        } catch (ClassCastException e) {
                            return context.getClassLoader();
                        }
                    } 
                    @Override
                    public ReadableArchive getSource() {
                        return subArchive;
                    }

                    @Override
                    public Properties getAppProps() {
                        return context.getAppProps();
                    }

                    @Override
                    public  U getCommandParameters(Class commandParametersType) {
                        return context.getCommandParameters(commandParametersType);
                    }

                    @Override
                    public void addTransientAppMetaData(String metaDataKey, 
                        Object metaData) {
                        context.addTransientAppMetaData(metaDataKey, 
                            metaData);
                    }

                    @Override
                    public   T getTransientAppMetaData(String metaDataKey, 
                        Class metadataType) {
                        return context.getTransientAppMetaData(metaDataKey, 
                            metadataType);
                    }

                    @Override
                    public Properties getModuleProps() {
                        return moduleProps;
                    }

                    @Override
                    public ReadableArchive getOriginalSource() {
                        try {
                            File appRoot = context.getSourceDir();
                            File origModuleFile = new File(appRoot, moduleUri); 
                            return archiveFactory.openArchive(
                                origModuleFile);
                        } catch (IOException ioe) {
                            return null;
                        }
                    }

                    @Override
                    public File getScratchDir(String subDirName) {
                        String modulePortion = Util.getURIName(
                            getSource().getURI());
                        return (new File(super.getScratchDir(subDirName), 
                            modulePortion));
                    }

                    @Override
                    public  T getModuleMetaData(Class metadataType) {
                        try {
                            return metadataType.cast(application.getModuleByUri(moduleUri));
                        } catch (Exception e) {
                            // let's first try the extensions mechanisms...
                            if (RootDeploymentDescriptor.class.isAssignableFrom(metadataType)) {
                                for (RootDeploymentDescriptor extension  : application.getModuleByUri(moduleUri).getExtensionsDescriptors((Class) metadataType)) {
                                    // we assume there can only be one type of
                                    if (extension!=null) {
                                        try {
                                            return metadataType.cast(extension);
                                        } catch (Exception e1) {
                                            // next one...
                                        }
                                    }
                                }
                                
                            }

                            return context.getModuleMetaData(metadataType);
                        }
                    }
                };

                ((ExtendedDeploymentContext)context).getModuleDeploymentContexts().put(moduleUri, moduleContext);
                moduleContext.setParentContext((ExtendedDeploymentContext)context);
                moduleContext.setModuleUri(moduleUri);
                ArchiveHandler subHandler = context.getModuleArchiveHandlers().get(moduleUri);
                moduleContext.setArchiveHandler(subHandler);

                return moduleContext;
    }

    private Properties getModuleProps(DeploymentContext context, 
        String moduleUri) {
        Map modulePropsMap = context.getModulePropsMap();
        Properties moduleProps = modulePropsMap.get(moduleUri);
        if (moduleProps == null) {
            moduleProps = new Properties();
            modulePropsMap.put(moduleUri, moduleProps);
        }
        return moduleProps;
    }
}