org.apache.shindig.social.opensocial.jpa.eclipselink.Bootstrap.java Source code

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Here is the source code for org.apache.shindig.social.opensocial.jpa.eclipselink.Bootstrap.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF 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.apache.shindig.social.opensocial.jpa.eclipselink;

import static org.eclipse.persistence.config.PersistenceUnitProperties.JDBC_DRIVER;
import static org.eclipse.persistence.config.PersistenceUnitProperties.JDBC_PASSWORD;
import static org.eclipse.persistence.config.PersistenceUnitProperties.JDBC_READ_CONNECTIONS_MIN;
import static org.eclipse.persistence.config.PersistenceUnitProperties.JDBC_URL;
import static org.eclipse.persistence.config.PersistenceUnitProperties.JDBC_USER;
import static org.eclipse.persistence.config.PersistenceUnitProperties.JDBC_WRITE_CONNECTIONS_MIN;
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.common.collect.Maps;

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

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

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

/**
 * 
 */
public class Bootstrap {

    private static final String DB_DRIVER = "db.driver";
    private static final String DB_URL = "db.url";
    private static final String DB_USER = "db.user";
    private static final String DB_PASSWORD = "db.password";
    private static final String DB_MIN_WRITE = "db.write.min";
    private static final String DB_MIN_NUM_READ = "db.read.min";
    private static final Log LOG = LogFactory.getLog(Boolean.class);
    private String minWrite;
    private String minRead;
    private String dbPassword;
    private String dbUser;
    private String dbUrl;
    private String dbDriver;
    private EntityManager entityManager;

    @Inject
    public Bootstrap(@Named(DB_DRIVER) String dbDriver, @Named(DB_URL) String dbUrl, @Named(DB_USER) String dbUser,
            @Named(DB_PASSWORD) String dbPassword, @Named(DB_MIN_NUM_READ) String minRead,
            @Named(DB_MIN_WRITE) String minWrite) {
        this.dbDriver = dbDriver;
        this.dbUrl = dbUrl;
        this.dbUser = dbUser;
        this.dbPassword = dbPassword == null || dbPassword.length() == 0 ? " " : dbPassword;
        this.minRead = minRead;
        this.minWrite = minWrite;

    }

    public void init(String unitName) {

        Map<String, String> properties = Maps.newHashMap();

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

        // Configure the internal EclipseLink connection pool
        properties.put(JDBC_DRIVER, dbDriver);
        properties.put(JDBC_URL, dbUrl);
        properties.put(JDBC_USER, dbUser);
        properties.put(JDBC_PASSWORD, dbPassword);
        properties.put(JDBC_READ_CONNECTIONS_MIN, minRead);
        properties.put(JDBC_WRITE_CONNECTIONS_MIN, minWrite);

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

        // 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);

        EntityManagerFactory emFactory = Persistence.createEntityManagerFactory(unitName, properties);
        entityManager = emFactory.createEntityManager();
    }

    /**
     * @param string
     * @return
     */
    public EntityManager getEntityManager(String unitName) {
        if (entityManager == null) {
            init(unitName);
        }
        return entityManager;
    }
}