/*
* 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.deltaspike.data.impl.tx;
import java.lang.reflect.Method;
import javax.enterprise.context.ApplicationScoped;
import javax.inject.Inject;
import org.apache.deltaspike.core.util.ClassUtils;
import org.apache.deltaspike.data.impl.builder.QueryBuilder;
import org.apache.deltaspike.data.impl.handler.CdiQueryInvocationContext;
import org.apache.deltaspike.data.impl.handler.EntityRepositoryHandler;
import org.apache.deltaspike.data.impl.handler.QueryRunner;
import org.apache.deltaspike.data.impl.meta.RequiresTransaction;
import org.apache.deltaspike.jpa.spi.entitymanager.ActiveEntityManagerHolder;
import org.apache.deltaspike.jpa.spi.transaction.TransactionStrategy;
@ApplicationScoped
public class TransactionalQueryRunner implements QueryRunner
{
@Inject
private TransactionStrategy strategy;
@Inject
private ActiveEntityManagerHolder activeEntityManagerHolder;
@Override
public Object executeQuery(final QueryBuilder builder, final CdiQueryInvocationContext context)
throws Throwable
{
if (needsTransaction(context))
{
try
{
activeEntityManagerHolder.set(context.getEntityManager());
return executeTransactional(builder, context);
}
finally
{
activeEntityManagerHolder.dispose();
}
}
return executeNonTransactional(builder, context);
}
protected Object executeNonTransactional(final QueryBuilder builder, final CdiQueryInvocationContext context)
{
return builder.executeQuery(context);
}
protected Object executeTransactional(final QueryBuilder builder, final CdiQueryInvocationContext context)
throws Exception
{
return strategy.execute(new InvocationContextWrapper(context)
{
@Override
public Object proceed() throws Exception
{
return builder.executeQuery(context);
}
});
}
private boolean needsTransaction(CdiQueryInvocationContext context)
{
boolean requiresTx = false;
Method method = context.getMethod();
if (ClassUtils.containsMethod(EntityRepositoryHandler.class, method))
{
Method executed = ClassUtils.extractMethod(EntityRepositoryHandler.class, method);
requiresTx = executed.isAnnotationPresent(RequiresTransaction.class);
}
return requiresTx || context.getRepositoryMethod().requiresTransaction();
}
}