[weld-dev] BeanManager.getReference() VS Context.get()

[Jozef Hartinger]

On 11/19/2013 03:09 AM, Muhammad Bhutto wrote:
> Hi All,
>
> Can you please explain me this one, I have confusion which one is better.
>
> 1.
>
> Bean<MyBean> bean = (Bean<MyBean>) 
> beanManager.resolve(beanManager.getBeans(MyBean.class));
> MyBean= (MyBean) beanManager.getReference(bean, bean.getBeanClass(), 
> beanManager.createCreationalContext(bean));
This one gives you a new instance of a client proxy. The client proxy 
will forward method calls to the current contextual instance of a 
particular context. You can therefore obtain the proxy once and keep it 
and the method calls will be invoked on the current instance (e.g. 
current request). It is also useful if the contextual instance is not 
serializable - the client proxy will be and will reconnect after you 
deserialize it.
>
> 2.
>
> Bean<MyBean> bean = (Bean<MyBean>) 
> beanManager.resolve(beanManager.getBeans(MyBean.class));
> MyBean bean = beanManager.getContext(bean.getScope()).get(bean, 
> beanManager.createCreationalContext(bean));
This obtains the target instance without a client proxy. You may still 
see a Weld's proxy in the class name but that is an enhanced subclass 
that provides interception and decoration. If the bean is not 
intercepted nor decorated this will be a plain instance of the given bean.

Usually (1) is more suitable unless you have a special use-case where 
you need to access the target instance directly (e.g. to access its fields).
>
>
> As i know  BeanManager.getReference() always creates a whole new proxy 
> instance, while the Context.get() reuses an existing proxy instance if 
> already created before.
>
>  Is BeanManager.getReference() is more use full than  Context.get() ??
>
> Thanks
>
> Muhammad Asif Bhutto
>
>
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