/*
* 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.myfaces.extensions.cdi.jpa.impl.transaction.context;
import org.apache.myfaces.extensions.cdi.jpa.api.TransactionScoped;
import org.apache.myfaces.extensions.cdi.jpa.api.Transactional;
import javax.enterprise.context.ContextNotActiveException;
import javax.enterprise.context.spi.Context;
import javax.enterprise.context.spi.Contextual;
import javax.enterprise.context.spi.CreationalContext;
import java.lang.annotation.Annotation;
import java.util.Map;
/**
* CDI Context for managing @{@link TransactionScoped} contextual instances.
*/
public class TransactionContext implements Context
{
// Attention! this is not a normal instance but a PROXY
// thus it resolves the correct contextual instance every time
private TransactionBeanStorage beanStorage;
public TransactionContext(TransactionBeanStorage beanStorage)
{
this.beanStorage = beanStorage;
}
public <T> T get(Contextual<T> component)
{
Map<Contextual, TransactionBeanEntry> transactionBeanEntryMap = beanStorage.getActiveTransactionContext();
if (transactionBeanEntryMap == null)
{
throw new ContextNotActiveException("Not accessed within a transactional method - use @" +
Transactional.class.getName());
}
TransactionBeanEntry transactionBeanEntry = transactionBeanEntryMap.get(component);
if (transactionBeanEntry != null)
{
return (T) transactionBeanEntry.getContextualInstance();
}
return null;
}
public <T> T get(Contextual<T> component, CreationalContext<T> creationalContext)
{
Map<Contextual, TransactionBeanEntry> transactionBeanEntryMap = beanStorage.getActiveTransactionContext();
if (transactionBeanEntryMap == null)
{
throw new ContextNotActiveException("Not accessed within a transactional method - use @" +
Transactional.class.getName());
}
TransactionBeanEntry transactionBeanEntry = transactionBeanEntryMap.get(component);
if (transactionBeanEntry != null)
{
return (T) transactionBeanEntry.getContextualInstance();
}
// if it doesn't yet exist, we need to create it now!
T instance = component.create(creationalContext);
transactionBeanEntry = new TransactionBeanEntry(component, instance, creationalContext);
transactionBeanEntryMap.put(component, transactionBeanEntry);
return instance;
}
public Class<? extends Annotation> getScope()
{
return TransactionScoped.class;
}
public boolean isActive()
{
try
{
return beanStorage.getActiveTransactionContext() != null;
}
catch (ContextNotActiveException e)
{
return false;
}
}
}