@Override
public <T> T get(final Contextual<T> component, final CreationalContext<T> creationalContext) {
assertActive();
T instance = get(component);
if (instance == null) {
if (creationalContext != null) {
Map<Contextual<?>, Object> componentInstanceMap = getComponentInstanceMap();
Map<Contextual<?>, CreationalContext<?>> creationalContextMap = getCreationalInstanceMap();
synchronized (componentInstanceMap) {
instance = (T) componentInstanceMap.get(component);
if (instance == null) {
instance = component.create(creationalContext);
if (instance != null) {
componentInstanceMap.put(component, instance);
creationalContextMap.put(component, creationalContext);
}
}
}
}
}
return instance;
}
/**
* Get the value from the view map (or null if not found).
*
* @param <T> the type.
* @param facesContext the faces context.
* @param contextual the contextual.
* @return the value or null if not found.
*/
public <T> T getBean(FacesContext facesContext, Contextual<T> contextual) {
T result = null;
Map<String, ViewScopeContextObject> contextMap = getContextMap(facesContext);
if (contextMap != null) {
if (!(contextual instanceof PassivationCapable)) {
throw new IllegalArgumentException(
"ViewScoped bean "
+ contextual.toString()
+ " must be PassivationCapable, but is not.");
}
ViewScopeContextObject contextObject =
contextMap.get(((PassivationCapable) contextual).getId());
if (contextObject != null) {
if (LOGGER.isLoggable(Level.FINEST)) {
LOGGER.log(
Level.FINEST,
"Getting value for @ViewScoped bean with name: {0}",
contextObject.getName());
}
result = (T) facesContext.getViewRoot().getViewMap(true).get(contextObject.getName());
}
}
return result;
}
@Override
public <T> T get(Contextual<T> bean, CreationalContext<T> creationalContext) {
if (creationalContext == null) {
return null;
}
checkActive();
if (passivatingScope) {
if (!(bean instanceof PassivationCapable)) {
throw new IllegalStateException(
bean.toString() + " doesn't implement " + PassivationCapable.class.getName());
}
}
ContextualStorage storage = getContextualStorage(bean, true);
Map<Object, ContextualInstanceInfo<?>> contextMap = storage.getStorage();
ContextualInstanceInfo<?> contextualInstanceInfo = contextMap.get(storage.getBeanKey(bean));
if (contextualInstanceInfo != null) {
@SuppressWarnings("unchecked")
final T instance = (T) contextualInstanceInfo.getContextualInstance();
if (instance != null) {
return instance;
}
}
return storage.createContextualInstance(bean, creationalContext);
}
/**
* We get PreDestroyViewMapEvent events from the JSF servlet and destroy our contextual instances.
* This should (theoretically!) also get fired if the webapp closes, so there should be no need to
* manually track all view scopes and destroy them at a shutdown.
*
* @see javax.faces.event.SystemEventListener#processEvent(javax.faces.event.SystemEvent)
*/
@Override
public void processEvent(final SystemEvent event) {
if (event instanceof PreDestroyViewMapEvent) {
Map<Contextual<?>, Object> componentInstanceMap = getComponentInstanceMap();
Map<Contextual<?>, CreationalContext<?>> creationalContextMap = getCreationalInstanceMap();
if (componentInstanceMap != null) {
for (Map.Entry<Contextual<?>, Object> componentEntry : componentInstanceMap.entrySet()) {
/*
* No way to inform the compiler of type <T> information, so
* it has to be abandoned here :(
*/
Contextual contextual = componentEntry.getKey();
Object instance = componentEntry.getValue();
CreationalContext creational = creationalContextMap.get(contextual);
contextual.destroy(instance, creational);
}
}
}
}
/**
* @param bean
* @param creationalContext
* @param <T>
* @return
*/
public <T> T createContextualInstance(
Contextual<T> bean, CreationalContext<T> creationalContext) {
Object beanKey = getBeanKey(bean);
if (isConcurrent()) {
// locked approach
ContextualInstanceInfo<T> instanceInfo = new ContextualInstanceInfo<T>();
ConcurrentHashMap<Object, ContextualInstanceInfo<?>> concurrentMap =
(ConcurrentHashMap<Object, ContextualInstanceInfo<?>>) contextualInstances;
ContextualInstanceInfo<T> oldInstanceInfo =
(ContextualInstanceInfo<T>) concurrentMap.putIfAbsent(beanKey, instanceInfo);
if (oldInstanceInfo != null) {
instanceInfo = oldInstanceInfo;
}
synchronized (instanceInfo) {
T instance = instanceInfo.getContextualInstance();
if (instance == null) {
instance = bean.create(creationalContext);
instanceInfo.setContextualInstance(instance);
instanceInfo.setCreationalContext(creationalContext);
}
return instance;
}
} else {
// simply create the contextual instance
ContextualInstanceInfo<T> instanceInfo = new ContextualInstanceInfo<T>();
instanceInfo.setCreationalContext(creationalContext);
instanceInfo.setContextualInstance(bean.create(creationalContext));
contextualInstances.put(beanKey, instanceInfo);
return instanceInfo.getContextualInstance();
}
}
public <T> T get(Scope scope, Contextual<T> contextual, CreationalContext<T> creationalContext) {
RequestContext ctx = currentContext.get();
if (ctx == null) throw new ContextNotActiveException();
if (!scope.isActive(ctx)) throw new ContextNotActiveException();
Object o = ctx.getContextualValue(scope, contextual);
if (o == null) {
if (creationalContext != null) {
o = contextual.create(creationalContext);
ctx.setContextualValue(scope, contextual, o);
}
}
return (T) o;
}
/**
* Destroy the view scoped beans for the given view and context map.
*
* @param viewMap the view map.
* @param contextMap the context map.
*/
private void destroyBeans(
Map<String, Object> viewMap, Map<String, ViewScopeContextObject> contextMap) {
ArrayList<String> removalNameList = new ArrayList<String>();
if (contextMap != null) {
for (Map.Entry<String, ViewScopeContextObject> entry : contextMap.entrySet()) {
String passivationCapableId = entry.getKey();
Contextual contextual = beanManager.getPassivationCapableBean(passivationCapableId);
ViewScopeContextObject contextObject = entry.getValue();
CreationalContext creationalContext = beanManager.createCreationalContext(contextual);
// We can no longer get this from the contextObject. Instead we must call
// beanManager.createCreationalContext(contextual)
contextual.destroy(viewMap.get(contextObject.getName()), creationalContext);
removalNameList.add(contextObject.getName());
}
Iterator<String> removalNames = removalNameList.iterator();
while (removalNames.hasNext()) {
String name = removalNames.next();
viewMap.remove(name);
}
}
}
/**
* Create the bean.
*
* @param <T> the type.
* @param facesContext the faces context.
* @param contextual the contextual.
* @param creational the creational.
* @return the value or null if not found.
*/
public <T> T createBean(
FacesContext facesContext, Contextual<T> contextual, CreationalContext<T> creational) {
if (LOGGER.isLoggable(Level.FINEST)) {
LOGGER.log(Level.FINEST, "Creating @ViewScoped CDI bean using contextual: {0}", contextual);
}
if (!(contextual instanceof PassivationCapable)) {
throw new IllegalArgumentException(
"ViewScoped bean " + contextual.toString() + " must be PassivationCapable, but is not.");
}
T result = contextual.create(creational);
if (result != null) {
String name = getName(result);
facesContext.getViewRoot().getViewMap(true).put(name, result);
String passivationCapableId = ((PassivationCapable) contextual).getId();
getContextMap(facesContext)
.put(passivationCapableId, new ViewScopeContextObject(passivationCapableId, name));
}
return result;
}
public <T> T get(Contextual<T> component, CreationalContext<T> creationalContext) {
Map<Contextual, TransactionBeanEntry> transactionBeanEntryMap =
getBeanStorage().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 static void destroyBean(
Contextual bean, ContextualInstanceInfo<?> contextualInstanceInfo) {
bean.destroy(
contextualInstanceInfo.getContextualInstance(),
contextualInstanceInfo.getCreationalContext());
}