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CDIManagedBeanHandlerImpl.java
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CDIManagedBeanHandlerImpl.java
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/*
* 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.cdi.impl;
import java.util.Map;
import javax.enterprise.inject.spi.BeanManager;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.servlet.ServletContext;
import org.apache.myfaces.cdi.util.BeanProvider;
import org.apache.myfaces.cdi.util.CDIUtils;
import org.apache.myfaces.cdi.JsfApplicationArtifactHolder;
import org.apache.myfaces.cdi.view.ViewScopeBeanHolder;
import org.apache.myfaces.cdi.view.ViewScopeCDIMap;
import org.apache.myfaces.flow.cdi.FlowScopeBeanHolder;
import org.apache.myfaces.spi.ViewScopeProvider;
/**
*
* @author Leonardo Uribe
*/
public class CDIManagedBeanHandlerImpl extends ViewScopeProvider
{
private BeanManager beanManager;
private ViewScopeBeanHolder viewScopeBeanHolder;
private FlowScopeBeanHolder flowScopeBeanHolder;
public CDIManagedBeanHandlerImpl()
{
ExternalContext externalContext = FacesContext.getCurrentInstance().getExternalContext();
beanManager = CDIUtils.getBeanManager(externalContext);
Object context = externalContext.getContext();
if (context instanceof ServletContext)
{
JsfApplicationArtifactHolder appBean = CDIUtils.lookup(beanManager,
JsfApplicationArtifactHolder.class);
appBean.setServletContext((ServletContext) context);
}
}
private ViewScopeBeanHolder getViewScopeBeanHolder()
{
if (viewScopeBeanHolder == null)
{
viewScopeBeanHolder = BeanProvider.getContextualReference(
beanManager, ViewScopeBeanHolder.class, false);
}
return viewScopeBeanHolder;
}
private FlowScopeBeanHolder getFlowScopeBeanHolder()
{
if (flowScopeBeanHolder == null)
{
flowScopeBeanHolder = BeanProvider.getContextualReference(
beanManager, FlowScopeBeanHolder.class, false);
}
return flowScopeBeanHolder;
}
public Map<String, Object> createViewScopeMap(FacesContext facesContext, String viewScopeId)
{
return new ViewScopeCDIMap(facesContext, viewScopeId);
}
public Map<String, Object> restoreViewScopeMap(FacesContext facesContext, String viewScopeId)
{
return new ViewScopeCDIMap(facesContext, viewScopeId);
}
public String generateViewScopeId(FacesContext facesContext)
{
return getViewScopeBeanHolder().generateUniqueViewScopeId();
}
/**
*
*/
public void onSessionDestroyed()
{
// In CDI case, the best way to deal with this is use a method
// with @PreDestroy annotation on a session scope bean
// ( ViewScopeBeanHolder.destroyBeans() ). There is no need
// to do anything else in this location, but it is advised
// in CDI the beans are destroyed at the end of the request,
// not when invalidateSession() is called.
FacesContext facesContext = FacesContext.getCurrentInstance();
if (facesContext != null)
{
if (facesContext.getExternalContext().getSession(false) != null &&
CDIUtils.isSessionScopeActive(beanManager))
{
if (isViewScopeBeanHolderCreated(facesContext))
{
getViewScopeBeanHolder().destroyBeans();
}
if (isFlowScopeBeanHolderCreated(facesContext))
{
getFlowScopeBeanHolder().destroyBeans();
}
}
}
}
private boolean isViewScopeBeanHolderCreated(FacesContext facesContext)
{
return facesContext.getExternalContext().
getSessionMap().containsKey(ViewScopeBeanHolder.VIEW_SCOPE_PREFIX_KEY);
}
private boolean isFlowScopeBeanHolderCreated(FacesContext facesContext)
{
return facesContext.getExternalContext().
getSessionMap().containsKey(FlowScopeBeanHolder.FLOW_SCOPE_PREFIX_KEY);
}
@Override
public void destroyViewScopeMap(FacesContext facesContext, String viewScopeId)
{
if (facesContext.getExternalContext().getSession(false) != null)
{
if (isViewScopeBeanHolderCreated(facesContext))
{
getViewScopeBeanHolder().destroyBeans(viewScopeId);
}
}
}
}