de.zib.gndms.GORFX.service.globus.resource.ExtGORFXResourceHome.java Source code

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Here is the source code for de.zib.gndms.GORFX.service.globus.resource.ExtGORFXResourceHome.java

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package de.zib.gndms.GORFX.service.globus.resource;

/*
 * Copyright 2008-2011 Zuse Institute Berlin (ZIB)
 *
 * Licensed 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.
 */

import de.zib.gndms.GORFX.service.GORFXConfiguration;
import de.zib.gndms.infra.GNDMSTools;
import de.zib.gndms.infra.GridConfig;
import de.zib.gndms.infra.service.GNDMSingletonServiceHome;
import de.zib.gndms.infra.system.GNDMSystem;
import de.zib.gndms.model.gorfx.types.io.xml.ProviderStageInXML;
import de.zib.gndms.gritserv.typecon.util.ProviderStageInXMLImpl;
import de.zib.gndms.logic.model.gorfx.c3grid.ParmFormatAux;
import org.apache.axis.message.addressing.AttributedURI;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.globus.wsrf.Resource;
import org.globus.wsrf.ResourceException;
import org.globus.wsrf.ResourceKey;
import org.globus.wsrf.impl.SimpleResourceKey;
import org.jetbrains.annotations.NotNull;

import javax.naming.NamingException;
import javax.persistence.EntityManagerFactory;

/**
 * This class overrides the ResourceHome that is automatically generated by introduce for Globus
 * Toolkit. In GNDMS this is mainly necessary to provide RDBMS/JPA-based resource persistence.
 * In order to use the extended resource home they have to be configured in jndi-config.xml.
 * If this has been done properly, you should see an info-level log message during the start up
 * of the web service container that notifies succesfull initialization of the extended resource
 * home.
 *
 * @author  try ste fan pla nti kow zib
 * @version $Id$
 *
 *          User: stepn Date: 16.07.2008 Time: 12:35:27
 */
public final class ExtGORFXResourceHome extends GORFXResourceHome implements GNDMSingletonServiceHome {

    // logger can be an instance field since resource home classes are instantiated at most once
    @NotNull
    @SuppressWarnings({ "FieldNameHidesFieldInSuperclass" })
    private final Log logger = LogFactory.getLog(ExtGORFXResourceHome.class);

    // System: Set during initialization
    @SuppressWarnings({ "FieldAccessedSynchronizedAndUnsynchronized" })
    @NotNull
    private GNDMSystem system;

    // Serbice Address: set during initialization
    @SuppressWarnings({ "FieldAccessedSynchronizedAndUnsynchronized" })
    private AttributedURI serviceAddress;

    private boolean initialized;

    // grid config for gndmsystem initialization
    @SuppressWarnings({ "StaticVariableOfConcreteClass" })
    private static final GridConfig SHARED_CONFIG = new GridConfig() {
        @Override
        @NotNull
        public String getGridJNDIEnvName() throws Exception {
            return GORFXConfiguration.getConfiguration().getGridJNDIEnv();
        }

        @Override
        @NotNull
        public String getGridName() throws Exception {
            return GORFXConfiguration.getConfiguration().getGridName();
        }

        @Override
        @NotNull
        public String getGridPath() throws Exception {
            return GORFXConfiguration.getConfiguration().getGridPath();
        }

    };

    public static GridConfig getGridConfig() {
        return SHARED_CONFIG;
    }

    @SuppressWarnings({ "UseOfSystemOutOrSystemErr" })
    @Override
    public synchronized void initialize() throws Exception {
        if (!initialized) {
            logger.info("Extended GORFX home initializing");
            try {
                try {
                    final GridConfig gridConfig = getGridConfig();
                    logger.debug("Config: " + gridConfig.asString());
                    system = gridConfig.retrieveSystemReference();
                    serviceAddress = GNDMSTools.getServiceAddressFromContext();

                    // todo add ProviderStageInXSD to system
                    // no nice place here but i currently don't know another
                    system.getInstanceDir().addInstance(ProviderStageInXML.class.getName(),
                            new ProviderStageInXMLImpl());
                    ParmFormatAux.setXmlWriter(new ProviderStageInXMLImpl());

                    initialized = true;

                    super.initialize(); // Overridden method
                } catch (NamingException e) {
                    throw new RuntimeException(e);
                }
            } catch (RuntimeException e) {
                initialized = false;
                logger.error("Initialization failed", e);
                e.printStackTrace(System.err);
                throw e;
            }
        }
    }

    private void ensureInitialized() {
        try {
            initialize();
        } catch (Exception e) {
            logger.error("Unexpected initialization error", e);
            throw new RuntimeException(e);
        }
    }

    @NotNull
    public synchronized GNDMSystem getSystem() {
        ensureInitialized();
        return system;
    }

    public void setSystem(@NotNull GNDMSystem systemParam) {
        throw new UnsupportedOperationException("Attribute \"system\" is read-only");
    }

    @NotNull
    public synchronized AttributedURI getServiceAddress() {
        ensureInitialized();
        return serviceAddress;
    }

    public ResourceKey getKeyForId(@NotNull final String id) {
        return new SimpleResourceKey(getKeyTypeName(), id);
    }

    @NotNull
    public String getNickName() {
        return "gorfx";
    }

    @Override
    public Resource createSingleton() {
        final GORFXResource resource = new GORFXResource();
        resource.setHome(this);
        return resource;
    }

    @SuppressWarnings({ "unchecked" })
    public String getSingletonID() throws ResourceException {
        return (String) ((GORFXResource) find(null)).getID();
    }

    @NotNull
    public EntityManagerFactory getEntityManagerFactory() {
        return getSystem().getEntityManagerFactory();
    }
}