org.eclipse.persistence.internal.jpa.jdbc.ConnectionProxyHandler Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of eclipselink Show documentation

EclipseLink build based upon Git transaction f2b9fc5

There is a newer version: 5.0.0-B03

/*
 * Copyright (c) 1998, 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0,
 * or the Eclipse Distribution License v. 1.0 which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
 */

// Contributors:
//     Oracle - initial API and implementation from Oracle TopLink
package org.eclipse.persistence.internal.jpa.jdbc;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.sql.Connection;

/**
 * A simple invocation handler for the proxied connection.
 *
 * Connections are proxied only when they are obtained from a
 * transactional data source and within the context of a JTA
 * transaction.
 */
public class ConnectionProxyHandler implements InvocationHandler {
    Connection connection;

    /************************/
    /***** Internal API *****/
    /************************/
    private void debug(String s) {
        System.out.println(s);
    }

    /*
     * Use this constructor
     */
    public ConnectionProxyHandler(Connection connection) {
        this.connection = connection;
    }

    /*********************************/
    /***** InvocationHandler API *****/
    /*********************************/

    /*
     * Gateway for method interception
     */
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        String methodName = method.getName();
        debug("PROXY method: " + methodName);
        // No-op if any of the following calls
        if (methodName.equals("close") || methodName.equals("commit") || methodName.equals("rollback")) {
            return null;
        }

        // Normal case is just to forward on to the real connection
        return method.invoke(connection, args);
    }
}