/*
* 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.handler;
import org.apache.deltaspike.core.api.lifecycle.Initialized;
import org.apache.deltaspike.core.api.provider.BeanProvider;
import org.apache.deltaspike.core.util.AnnotationUtils;
import org.apache.deltaspike.core.util.ExceptionUtils;
import org.apache.deltaspike.core.util.ProxyUtils;
import org.apache.deltaspike.core.util.interceptor.AbstractInvocationContext;
import org.apache.deltaspike.core.util.metadata.AnnotationInstanceProvider;
import org.apache.deltaspike.data.api.QueryInvocationException;
import org.apache.deltaspike.data.api.Repository;
import org.apache.deltaspike.data.impl.builder.QueryBuilder;
import org.apache.deltaspike.data.impl.builder.QueryBuilderFactory;
import org.apache.deltaspike.data.impl.meta.RepositoryComponent;
import org.apache.deltaspike.data.impl.meta.RepositoryComponents;
import org.apache.deltaspike.data.impl.meta.RepositoryMethod;
import org.apache.deltaspike.jpa.api.transaction.Transactional;
import org.apache.deltaspike.jpa.spi.entitymanager.ActiveEntityManagerHolder;
import org.apache.deltaspike.jpa.spi.transaction.TransactionStrategy;
import javax.enterprise.inject.Any;
import javax.enterprise.inject.spi.BeanManager;
import javax.inject.Inject;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceException;
import java.io.Serializable;
import java.lang.annotation.Annotation;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.enterprise.context.ApplicationScoped;
/**
* Entry point for query processing.
*/
@Repository
@ApplicationScoped
public class QueryHandler implements Serializable, InvocationHandler
{
private static final Logger log = Logger.getLogger(QueryHandler.class.getName());
@Inject
private QueryBuilderFactory queryBuilderFactory;
@Inject
@Initialized
private RepositoryComponents components;
@Inject
private CdiQueryContextHolder context;
@Inject
private EntityManagerRefLookup entityManagerRefLookup;
@Inject
private QueryRunner runner;
@Inject
private BeanManager beanManager;
@Inject
private TransactionStrategy transactionStrategy;
@Inject
private ActiveEntityManagerHolder activeEntityManagerHolder;
@Override
public Object invoke(final Object proxy, final Method method, final Object[] args) throws Throwable
{
Transactional transactionalAnnotation =
AnnotationUtils.extractAnnotationFromMethodOrClass(
this.beanManager, method, proxy.getClass(), Transactional.class);
if (transactionalAnnotation != null)
{
if (transactionalAnnotation.qualifier().length > 1)
{
throw new IllegalStateException(proxy.getClass().getName() + " uses @" + Transactional.class.getName() +
" with multiple qualifiers. That isn't supported with @" + Repository.class.getName());
}
Class<? extends Annotation> qualifier = transactionalAnnotation.qualifier()[0];
if (!Any.class.equals(qualifier))
{
EntityManager entityManager = BeanProvider.getContextualReference(
EntityManager.class, false, AnnotationInstanceProvider.of(qualifier));
activeEntityManagerHolder.set(entityManager);
}
return transactionStrategy.execute(
new AbstractInvocationContext<Object>(proxy, method, args, null)
{
@Override
public Object proceed() throws Exception
{
try
{
return process(proxy, method, args);
}
catch (Throwable t)
{
throw ExceptionUtils.throwAsRuntimeException(t);
}
}
});
}
else
{
return process(proxy, method, args);
}
}
public Object process(Object proxy, Method method, Object[] args) throws Throwable
{
CdiQueryInvocationContext queryContext = null;
EntityManagerRef entityManagerRef = null;
try
{
List<Class<?>> candidates = ProxyUtils.getProxyAndBaseTypes(proxy.getClass());
RepositoryComponent repo = components.lookupComponent(candidates);
RepositoryMethod repoMethod = components.lookupMethod(repo, method);
entityManagerRef = entityManagerRefLookup.lookupReference(repo);
queryContext = createContext(proxy, method, args, entityManagerRef.getEntityManager(), repoMethod);
QueryBuilder builder = queryBuilderFactory.build(repoMethod, queryContext);
Object result = runner.executeQuery(builder, queryContext);
return result;
}
catch (PersistenceException e)
{
throw e;
}
catch (Exception e)
{
log.log(Level.FINEST, "Query execution error", e);
if (queryContext != null)
{
throw new QueryInvocationException(e, queryContext);
}
throw new QueryInvocationException(e, proxy.getClass(), method);
}
finally
{
if (entityManagerRef != null)
{
entityManagerRef.release();
}
context.dispose();
}
}
private CdiQueryInvocationContext createContext(Object proxy, Method method,
Object[] args, EntityManager entityManager, RepositoryMethod repoMethod)
{
CdiQueryInvocationContext queryContext = new CdiQueryInvocationContext(proxy, method, args, repoMethod,
entityManager);
context.set(queryContext);
queryContext.initMapper();
return queryContext;
}
}