/*
* 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.lucene.engine.transaction.readcommitted;
import org.compass.core.lucene.engine.LuceneSearchEngine;
import org.compass.core.lucene.engine.transaction.TransactionProcessor;
import org.compass.core.lucene.engine.transaction.TransactionProcessorFactory;
/**
* A transaction processor factory that creates {@link ReadCommittedTransactionProcessor}
* instances.
*
* <p>Read committed transaction processor allows to isolate changes done during a transaction from other
* transactions until commit. It also allows for load/get/find operations to take into account changes
* done during the current transaction. This means that a delete that occurs during a transaction will
* be filtered out if a search is executed within the same transaction just after the delete.
*
* @author kimchy
* @see org.compass.core.lucene.engine.transaction.readcommitted.ReadCommittedTransactionProcessor
*/
public class ReadCommittedTransactionProcessorFactory implements TransactionProcessorFactory {
/**
* Constructs a new {@link org.compass.core.lucene.engine.transaction.readcommitted.ReadCommittedTransactionProcessor}.
*/
public TransactionProcessor create(LuceneSearchEngine searchEngine) {
return new ReadCommittedTransactionProcessor(searchEngine);
}
public void close() {
}
/**
* Read committed transaction processor is not threads safe.
*/
public boolean isThreadSafe() {
return false;
}
}