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Problem in JSF2 with client-side state saving and serialization

Answer 1

+1 A:

The exception basically tells that you cannot (and should not) not store HttpClient in HttpSession. Apparently you've assigned it as a property of some session scoped bean. You should not do that. Either declare it transient or keep it threadlocal (i.e. only declare and use it in local method block, so that you can get rid of the property). The latter approach has my recommendation since HttpClient maintains some internal state which might make your application to break when it all get deserialized. If you'd like to have a long-living instance of it because recreating it is expensive, then I recommend to store it in an application scoped bean instead.

BalusC 2010-05-02 14:55:26

thanks, i try transient... but if you take a look at the class diagram you see, that the connection is application scoped... and the bean with the properties are view scoped...

marcel 2010-05-02 15:04:50

I didn't have a close look to the diagram, actually the whole image didn't show up. But storing the connection in the application scope is a bad idea. You can't expect that the connection will live as long as your application lives. It will timeout sooner or later and your application may break.

BalusC 2010-05-02 15:16:35

hm... i like to store in the connection in applecation scope... all user should use the same connection and on application startup the connection should be started...

marcel 2010-05-02 15:19:12

You may take it whatever you want. You've at least been warned :) External resources should always be acquired and closed in the shortest possible scope.

BalusC 2010-05-02 15:22:28

how do you handle this? i am new at the java web-dev world :/

marcel 2010-05-02 15:32:44

Declare, acquire and close in a `try-finally` inside the method block where you need to access the resource. This is not specifically related to Java webdevelopment, but to programming in general.

BalusC 2010-05-02 19:08:25

(+1) I think you were serially downvoted ?

Bozho 2010-05-03 10:13:13

@Bozho: yes, someone with old hurts who wanted more attention from me. Fortunately they are recently all (35 or so over 2 days) removed.

BalusC 2010-05-03 11:09:08

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Problem in JSF2 with client-side state saving and serialization

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