net.sf.ehcache.transaction.manager.selector.Selector Maven / Gradle / Ivy
/**
* Copyright Terracotta, Inc.
*
* 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 net.sf.ehcache.transaction.manager.selector;
import net.sf.ehcache.transaction.xa.EhcacheXAResource;
import javax.transaction.TransactionManager;
/**
* Abstract class which is used to do various things related to JTA transaction managers,
* like looking them up, registering XAResources for recovery...
*
* @author Ludovic Orban
*/
public abstract class Selector {
private final String vendor;
private volatile TransactionManager transactionManager;
/**
* Constructor
*
* @param vendor an indicative transaction manager vendor name
* this selector is working with.
*/
protected Selector(String vendor) {
this.vendor = vendor;
}
/**
* Get the vendor name
* @return the vendor name
*/
public String getVendor() {
return vendor;
}
/**
* Get the transaction manager, looking it up if necessary.
* Once the transaction manager has been looked up, its reference is cached.
* @return the transaction manager
*/
public TransactionManager getTransactionManager() {
if (transactionManager == null) {
transactionManager = doLookup();
}
return transactionManager;
}
/**
* Register an XAResource with the transaction manager.
*
* @param ehcacheXAResource the XAResource
* @param forRecovery true if this XAResource is being registered purely for recovery purpose
*/
public void registerResource(EhcacheXAResource ehcacheXAResource, boolean forRecovery) {
}
/**
* Unregister an XAResource from the transaction manager.
*
* @param ehcacheXAResource the XAResource
* @param forRecovery true if this XAResource was registered purely for recovery purpose
*/
public void unregisterResource(EhcacheXAResource ehcacheXAResource, boolean forRecovery) {
}
/**
* Lookup the transaction manager.
*
* @return the transaction manager, or null if it could not be looked up.
*/
protected abstract TransactionManager doLookup();
}