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From Mark Struberg <>
Subject Re: Beans and PassivationCapable
Date Tue, 07 Feb 2017 10:35:10 GMT
Hi Tamás!

I strongly recommend that EVERY Bean<T> should implement PassivationCapable!

The reason is the following: we need that information to serialise the proxies.

Consider you have an 

public class MailService {....}

Of course this class doesn't need to be Serializable, because it doesn't leave the server,

Now you take a

public class MailForm implements Serializable {
 private @Inject MailService mailSvc;

So the MailForm instances might get serialised to another node.
With this the MailService Contextual Reference (the PROXY!) get's also serialised along as

So while the MailService Contextual Instance (the actual 'application-singleton') does NOT
get serialised, the Contextual Reference (the proxy) *will*.

That means that the Bean needs to be PassivationCapable.
Ofc only the Bean<MailService>, not the Contextual Instance of the MailService!



> Am 06.02.2017 um 22:12 schrieb Tamás Kimmel <>:
> Hi.
> I'm experimenting with a custom cdi context. 
> I've found all Beans for non-Serializable classes are PassivationCapable ( org.apache.webbeans.component.ManagedBean).
> getId returns an id, and beanManager.getPassivationCapableBean works on it.
> - checked Weld, and works same too -
> Are there any circumstances a Bean not instance of PassivationCapable?
> Is it something i can rely on? 
> For example use the passivation id for key in my contextual storage even for beans with
non-serializable beanClasses.
> I know bean classes, interceptors, and decorators have to be Serializable for a working
> Thanks in advance,
> Kimmel Tamás

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