org.apache.openjpa.ee.WASRegistryManagedRuntime Maven / Gradle / Ivy
/*
* 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.openjpa.ee;
import com.ibm.wsspi.uow.UOWAction;
import java.lang.reflect.Method;
/**
* WASRegistryManagedRuntime provides WebSphere specific extensions to
* {@link RegistryManagedRuntime}. Currently these extensions consist of using
* the WebSphere UOWManager interface to submit non transactional work.
*/
public class WASRegistryManagedRuntime extends RegistryManagedRuntime {
// value taken from com.ibm.websphere.uow.UOWSynchronizationRegistry
private static final int WEBSPHERE_UOW_TYPE_LOCAL_TRANSACTION = 0;
private final Method getUOWManager;
private final Method runUnderUOW;
public WASRegistryManagedRuntime() {
try {
Class classUOWManagerFactory = Class.forName("com.ibm.wsspi.uow.UOWManagerFactory");
getUOWManager = classUOWManagerFactory.getMethod("getUOWManager");
Class classUOWManager = Class.forName("com.ibm.wsspi.uow.UOWManager");
runUnderUOW = classUOWManager.getMethod("runUnderUOW", new Class[]{int.class, boolean.class, UOWAction.class});
}
catch (Exception e) {
throw new RuntimeException("Problem while creating WASManagedRuntime", e);
}
}
/**
*
* RegistryManagedRuntime cannot suspend transactions, but WebSphere
* provides an interface to submit work outside of the current tran.
*
*/
@Override
public void doNonTransactionalWork(Runnable runnable)
throws RuntimeException, UnsupportedOperationException {
try {
Object uowManager = getUOWManager.invoke(null);
runUnderUOW.invoke(uowManager, WEBSPHERE_UOW_TYPE_LOCAL_TRANSACTION, false, new DelegatingUOWAction(runnable));
}
catch(Exception e ) {
RuntimeException re = new RuntimeException(e.getMessage(), e);
throw re;
}
}
/**
* Delegate for the WebSphere proprietary UOWAction interface. Enables a
* {@link Runnable} to be passed in to the WebSphere UOWManager.
*/
class DelegatingUOWAction implements UOWAction {
Runnable _del;
public DelegatingUOWAction(Runnable delegate) {
_del = delegate;
}
@Override
public void run() throws Exception {
_del.run();
}
}
}