org.sakaiproject.kernel.persistence.eclipselink.EntityManagerFactoryProvider.java Source code

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Here is the source code for org.sakaiproject.kernel.persistence.eclipselink.EntityManagerFactoryProvider.java

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/*
 * Licensed to the Sakai Foundation (SF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The SF 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.sakaiproject.kernel.persistence.eclipselink;

import static org.eclipse.persistence.config.PersistenceUnitProperties.LOGGING_LEVEL;
import static org.eclipse.persistence.config.PersistenceUnitProperties.LOGGING_SESSION;
import static org.eclipse.persistence.config.PersistenceUnitProperties.LOGGING_THREAD;
import static org.eclipse.persistence.config.PersistenceUnitProperties.LOGGING_TIMESTAMP;
import static org.eclipse.persistence.config.PersistenceUnitProperties.TARGET_SERVER;
import static org.eclipse.persistence.config.PersistenceUnitProperties.TRANSACTION_TYPE;

import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.name.Named;

import edu.umd.cs.findbugs.annotations.SuppressWarnings;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.eclipse.persistence.config.PersistenceUnitProperties;
import org.eclipse.persistence.config.TargetServer;
import org.sakaiproject.kernel.KernelConstants;
import org.sakaiproject.kernel.api.persistence.DataSourceService;
import org.sakaiproject.kernel.component.core.PersistenceUnitClassLoader;

import java.util.HashMap;
import java.util.Map;

import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.persistence.spi.PersistenceUnitTransactionType;

/**
 * Guice provider for {@link javax.persistence.EntityManager} as implemented by
 * Eclipselink.
 */
public class EntityManagerFactoryProvider implements Provider<EntityManagerFactory> {
    private static final Log LOG = LogFactory.getLog(EntityManagerFactoryProvider.class);
    private static final boolean debug = LOG.isDebugEnabled();

    private EntityManagerFactory entityManagerFactory;

    /**
     * Construct an EclipseLink entity manager provider.
     *
     * @param minRead
     * @param minWrite
     * @param dataSourceService
     * @param unitName
     */
    @Inject
    @SuppressWarnings(value = {
            "DP_CREATE_CLASSLOADER_INSIDE_DO_PRIVILEGED" }, justification = "Expected to only ever be executed from a privalaged environment")
    public EntityManagerFactoryProvider(DataSourceService dataSourceService,
            @Named(KernelConstants.DB_MIN_NUM_READ) String minRead,
            @Named(KernelConstants.DB_MIN_WRITE) String minWrite,
            @Named(KernelConstants.DB_UNITNAME) String unitName,
            @Named(KernelConstants.JDBC_DRIVER_NAME) String driverClassName,
            @Named(KernelConstants.JDBC_URL) String url, @Named(KernelConstants.JDBC_USERNAME) String username,
            @Named(KernelConstants.JDBC_PASSWORD) String password) {

        Map<String, Object> properties = new HashMap<String, Object>();

        // Ensure RESOURCE_LOCAL transactions is used.
        properties.put(TRANSACTION_TYPE, PersistenceUnitTransactionType.RESOURCE_LOCAL.name());

        LOG.info("Using provided data source");
        properties.put(dataSourceService.getType(), dataSourceService.getDataSource());

        // Configure the internal EclipseLink connection pool
        // LOG.info("Creating internal data source");
        // properties.put(PersistenceUnitProperties.JDBC_DRIVER, driverClassName);
        // properties.put(PersistenceUnitProperties.JDBC_URL, url);
        // properties.put(PersistenceUnitProperties.JDBC_USER, username);
        // properties.put(PersistenceUnitProperties.JDBC_PASSWORD, password);
        // properties
        // .put(PersistenceUnitProperties.JDBC_READ_CONNECTIONS_MIN, minRead);
        // properties.put(PersistenceUnitProperties.JDBC_WRITE_CONNECTIONS_MIN,
        // minWrite);

        // Configure logging. FINE ensures all SQL is shown
        properties.put(LOGGING_LEVEL, (debug ? "FINE" : "INFO"));
        properties.put(LOGGING_TIMESTAMP, "true");
        properties.put(LOGGING_THREAD, "true");
        properties.put(LOGGING_SESSION, "true");

        // Ensure that no server-platform is configured
        properties.put(TARGET_SERVER, TargetServer.None);

        properties.put(PersistenceUnitProperties.DDL_GENERATION, PersistenceUnitProperties.CREATE_ONLY);
        properties.put(PersistenceUnitProperties.DROP_JDBC_DDL_FILE, "drop.sql");
        properties.put(PersistenceUnitProperties.CREATE_JDBC_DDL_FILE, "create.sql");
        properties.put(PersistenceUnitProperties.DDL_GENERATION_MODE,
                PersistenceUnitProperties.DDL_BOTH_GENERATION);

        // properties.put(PersistenceUnitProperties.SESSION_CUSTOMIZER,
        // EnableIntegrityChecker.class.getName());

        LOG.info("Starting connection manager with properties " + properties);
        final Thread currentThread = Thread.currentThread();
        final ClassLoader saveClassLoader = currentThread.getContextClassLoader();

        PersistenceUnitClassLoader persistenceCL = new PersistenceUnitClassLoader(this.getClass().getClassLoader());
        currentThread.setContextClassLoader(persistenceCL);
        entityManagerFactory = Persistence.createEntityManagerFactory(unitName, properties);
        currentThread.setContextClassLoader(saveClassLoader);

    }

    /**
     * {@inheritDoc}
     *
     * @see com.google.inject.Provider#get()
     */
    public EntityManagerFactory get() {
        return entityManagerFactory;
    }

}