org.apache.ode.dao.jpa.hibernate.DataSourceConnectionProvider.java Source code

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Here is the source code for org.apache.ode.dao.jpa.hibernate.DataSourceConnectionProvider.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.ode.dao.jpa.hibernate;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.Map;
import java.util.Properties;

import org.apache.ode.utils.DbIsolation;
import org.hibernate.HibernateException;
import org.hibernate.service.UnknownUnwrapTypeException;
import org.hibernate.service.jdbc.connections.spi.ConnectionProvider;
import org.hibernate.service.spi.Configurable;
import org.hibernate.service.spi.Stoppable;

/**
 * 
 * @author jeffyu
 *
 */
public class DataSourceConnectionProvider implements ConnectionProvider, Configurable, Stoppable {

    private static final long serialVersionUID = -2686513656521329257L;

    private Properties _props;

    private boolean available = true;

    public DataSourceConnectionProvider() {
    }

    @SuppressWarnings({ "unchecked" })
    public void configure(Map properties) {
        _props = new Properties();
        _props.putAll(properties);
    }

    public Connection getConnection() throws SQLException {
        if (!available) {
            throw new HibernateException("Provider is closed!");
        }
        Connection c = HibernateUtil.getConnection(_props);
        DbIsolation.setIsolationLevel(c);
        return c;
    }

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

    public boolean supportsAggressiveRelease() {
        return true;
    }

    public boolean isUnwrappableAs(Class unwrapType) {
        return ConnectionProvider.class.equals(unwrapType)
                || DataSourceConnectionProvider.class.isAssignableFrom(unwrapType);
    }

    @SuppressWarnings({ "unchecked" })
    public <T> T unwrap(Class<T> unwrapType) {
        if (ConnectionProvider.class.equals(unwrapType)
                || DataSourceConnectionProvider.class.isAssignableFrom(unwrapType)) {
            return (T) this;
        } else {
            throw new UnknownUnwrapTypeException(unwrapType);
        }
    }

    public void stop() {
        available = false;
    }

}