WebSphere.java

/*
 * Copyright 2004-2009 the original author or authors.
 * 
 * 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 org.compass.core.transaction.manager;

import javax.transaction.TransactionManager;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.compass.core.config.CompassSettings;
import org.compass.core.transaction.TransactionException;
import org.compass.core.transaction.TransactionManagerLookup;

/**
 * TransactionManager lookup strategy for WebSphere (versions 4, 5.0 and 5.1)
 * 
 * @author kimchy
 */
public class WebSphere implements TransactionManagerLookup {

    private static final Log log = LogFactory.getLog(WebSphere.class);

    private int version;

    public TransactionManager getTransactionManager(CompassSettings settings) throws TransactionException {
        try {
            Class clazz;
            try {
                clazz = Class.forName("com.ibm.ws.Transaction.TransactionManagerFactory");
                version = 5;
                log.debug("Found WebSphere 5.1+");
            } catch (Exception e) {
                try {
                    clazz = Class.forName("com.ibm.ejs.jts.jta.TransactionManagerFactory");
                    version = 5;
                    log.debug("Found WebSphere 5.0");
                } catch (Exception e2) {
                    clazz = Class.forName("com.ibm.ejs.jts.jta.JTSXA");
                    version = 4;
                    log.debug("Found WebSphere 4");
                }
            }

            return (TransactionManager) clazz.getMethod("getTransactionManager").invoke(null);
        } catch (Exception e) {
            throw new TransactionException("Could not obtain WebSphere JTSXA instance", e);
        }
    }

    public String getUserTransactionName() {
        return version == 5 ? "java:comp/UserTransaction" : "jta/usertransaction";
    }
}