com.frameworkset.common.poolman.hibernate.LocalDataSourceConnectionProvider.java Source code

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Here is the source code for com.frameworkset.common.poolman.hibernate.LocalDataSourceConnectionProvider.java

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/*
 * Copyright 2002-2009 the original author or authors.
 *
 * 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.
 */

package com.frameworkset.common.poolman.hibernate;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;
import javax.sql.DataSource;

import org.hibernate.HibernateException;
import org.hibernate.connection.ConnectionProvider;
import org.hibernate.util.JDBCExceptionReporter;

/**
 * Hibernate connection provider for local DataSource instances
 * in an application context. This provider will be used if
 * LocalSessionFactoryBean's "dataSource" property is set
 * without a Hibernate TransactionManagerLookup.
 *
 * @author Juergen Hoeller
 * @since 1.2
 * @see LocalSessionFactoryBean#setDataSource
 */
public class LocalDataSourceConnectionProvider implements ConnectionProvider {

    private DataSource dataSource;

    private DataSource dataSourceToUse;

    public void configure(Properties props) throws HibernateException {
        this.dataSource = LocalSessionFactoryBean.getConfigTimeDataSource();
        // absolutely needs thread-bound DataSource to initialize
        if (this.dataSource == null) {
            throw new HibernateException("No local DataSource found for configuration - "
                    + "'dataSource' property must be set on LocalSessionFactoryBean");
        }
        this.dataSourceToUse = getDataSourceToUse(this.dataSource);
    }

    /**
     * Return the DataSource to use for retrieving Connections.
     * <p>This implementation returns the passed-in DataSource as-is.
     * @param originalDataSource the DataSource as configured by the user
     * on LocalSessionFactoryBean
     * @return the DataSource to actually retrieve Connections from
     * (potentially wrapped)
     * @see LocalSessionFactoryBean#setDataSource
     */
    protected DataSource getDataSourceToUse(DataSource originalDataSource) {
        return originalDataSource;
    }

    /**
     * Return the DataSource that this ConnectionProvider wraps.
     */
    public DataSource getDataSource() {
        return this.dataSource;
    }

    /**
     * This implementation delegates to the underlying DataSource.
     * @see javax.sql.DataSource#getConnection()
     */
    public Connection getConnection() throws SQLException {
        try {
            return this.dataSourceToUse.getConnection();
        } catch (SQLException ex) {
            JDBCExceptionReporter.logExceptions(ex);
            throw ex;
        }
    }

    /**
     * This implementation simply calls <code>Connection.close</code>.
     * @see java.sql.Connection#close()
     */
    public void closeConnection(Connection con) throws SQLException {
        try {
            con.close();
        } catch (SQLException ex) {
            JDBCExceptionReporter.logExceptions(ex);
            throw ex;
        }
    }

    /**
     * This implementation does nothing:
     * We're dealing with an externally managed DataSource.
     */
    public void close() {
    }

    /**
     * This implementation returns <code>false</code>: We cannot guarantee
     * to receive the same Connection within a transaction, not even when
     * dealing with a JNDI DataSource.
     */
    public boolean supportsAggressiveRelease() {
        return false;
    }

}