//$Id: TransactionalWorker.java 15605 2008-11-23 10:48:59Z hardy.ferentschik $
package org.hibernate.search.backend.impl;
import java.util.Properties;
import javax.transaction.Synchronization;
import org.hibernate.search.backend.QueueingProcessor;
import org.hibernate.search.backend.Work;
import org.hibernate.search.backend.WorkQueue;
import org.hibernate.search.backend.Worker;
import org.hibernate.search.backend.TransactionContext;
import org.hibernate.search.engine.SearchFactoryImplementor;
import org.hibernate.search.util.WeakIdentityHashMap;
/**
* Queue works per transaction.
* If out of transaction, the work is executed right away
* <p/>
* When <code>hibernate.search.worker.type</code> is set to <code>async</code>
* the work is done in a separate thread (threads are pooled)
*
* @author Emmanuel Bernard
*/
public class TransactionalWorker implements Worker {
//not a synchronized map since for a given transaction, we have not concurrent access
protected final WeakIdentityHashMap<Object, Synchronization> synchronizationPerTransaction = new WeakIdentityHashMap<Object, Synchronization>();
private QueueingProcessor queueingProcessor;
public void performWork(Work work, TransactionContext transactionContext) {
if ( transactionContext.isTransactionInProgress() ) {
Object transaction = transactionContext.getTransactionIdentifier();
PostTransactionWorkQueueSynchronization txSync = ( PostTransactionWorkQueueSynchronization )
synchronizationPerTransaction.get( transaction );
if ( txSync == null || txSync.isConsumed() ) {
txSync = new PostTransactionWorkQueueSynchronization(
queueingProcessor, synchronizationPerTransaction
);
transactionContext.registerSynchronization( txSync );
synchronizationPerTransaction.put( transaction, txSync );
}
txSync.add( work );
}
else {
WorkQueue queue = new WorkQueue( 2 ); //one work can be split
queueingProcessor.add( work, queue );
queueingProcessor.prepareWorks( queue );
queueingProcessor.performWorks( queue );
}
}
public void initialize(Properties props, SearchFactoryImplementor searchFactory) {
this.queueingProcessor = new BatchedQueueingProcessor( searchFactory, props );
}
public void close() {
queueingProcessor.close();
}
public void flushWorks(TransactionContext transactionContext) {
if ( transactionContext.isTransactionInProgress() ) {
Object transaction = transactionContext.getTransactionIdentifier();
PostTransactionWorkQueueSynchronization txSync = ( PostTransactionWorkQueueSynchronization )
synchronizationPerTransaction.get( transaction );
if ( txSync != null && !txSync.isConsumed() ) {
txSync.flushWorks();
}
}
}
}