/**
* @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();
}
}
