[Springframework-developer] OpenSessionInViewFilter

[Artem P. <bla...@ca...>]

  I am sorry, but I was not subscribed to the mailing list when I posted =
my original message regarding the OpenSessionInViewFilter implementation =
in Spring.

  The main reason why I want to store the Hibernate session in the HTTP =
session is that in my application, the lifetime of a business objects =
exceeds an HTTP request. Furthermore, the application is layered, and =
re-attaching all business objects to a new session for every request =
would require leaking some Hibernate-specific code into the presentation =
layer and/or implementing "reattachment" mechanisms in my business logic =
layer. The time it takes to create session objects is immaterial, and I =
am not currently concerned about performance at that level. I'm more =
concerned about proper layering.

  I don't want to replace the original filter with the one I'm =
proposing... It's just an alternative for applications that require =
long-running sessions. Applications that do not use session management =
will work just fine with the original filter. The main problem is that =
even though Hibernate entities are "just POJOs", they will most likely =
contain proxies, and if the original session is closed, they need to be =
merge()d with a new session or else they will start throwing exceptions. =


Thank you,
Artem Ploujnikov