com.zutubi.pulse.master.hibernate.HackyConnectionProvider.java Source code

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Here is the source code for com.zutubi.pulse.master.hibernate.HackyConnectionProvider.java

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/* Copyright 2017 Zutubi Pty Ltd
 *
 * 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.zutubi.pulse.master.hibernate;

import org.hibernate.HibernateException;
import org.hibernate.engine.jdbc.connections.spi.ConnectionProvider;

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

/**
 * The purpose of this ConnectionProvider is to provide a programmatic specify
 * the database connection to be used by hibernate.
 *
 * Hibernate uses two methods to lookup its datasource / jdbc connection.
 * <ul>
 * <li>a)</li> via a datasource bound to JNDI
 * <li>b)</li> via a connection provider.
 * <ul>
 * Since we do not have a jndi bound datasource handy all of the time, option
 * 'b' is what is used. The only downside with option 'b' is that hibernate does
 * not allow applications any control over the creation of the ConnectionProvider
 * class.
 * The result is this hacky connection provider that contains a public static
 * DataSource field that allows us to programmatically specify the dataSource that
 * will be used.
 * 
 */
public class HackyConnectionProvider implements ConnectionProvider {
    public static DataSource dataSource;

    public void configure(Properties props) throws HibernateException {
        if (dataSource == null) {
            throw new HibernateException("DataSource must be set statically.");
        }
    }

    public Connection getConnection() throws SQLException {
        return dataSource.getConnection();
    }

    public void closeConnection(Connection conn) throws SQLException {
        conn.close();
    }

    public boolean supportsAggressiveRelease() {
        return true;
    }

    public boolean isUnwrappableAs(Class aClass) {
        throw new RuntimeException("Not yet implemented");
    }

    public <T> T unwrap(Class<T> aClass) {
        throw new RuntimeException("Not yet implemented");
    }
}