oracle.toplink.essentials.internal.ejb.cmp3.jdbc.base.ConnectionProxyHandler Maven / Gradle / Ivy
/*
* The contents of this file are subject to the terms
* of the Common Development and Distribution License
* (the "License"). You may not use this file except
* in compliance with the License.
*
* You can obtain a copy of the license at
* glassfish/bootstrap/legal/CDDLv1.0.txt or
* https://glassfish.dev.java.net/public/CDDLv1.0.html.
* See the License for the specific language governing
* permissions and limitations under the License.
*
* When distributing Covered Code, include this CDDL
* HEADER in each file and include the License file at
* glassfish/bootstrap/legal/CDDLv1.0.txt. If applicable,
* add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your
* own identifying information: Portions Copyright [yyyy]
* [name of copyright owner]
*/
// Copyright (c) 1998, 2007, Oracle. All rights reserved.
package oracle.toplink.essentials.internal.ejb.cmp3.jdbc.base;
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);
}
}