Ant: [Php-java-bridge-users] NoSuchMethodException: __sleep()

[Jost B. <jos...@ya...>]

Hi Jonathan,

> php_mod_java(59): Synchronization problem, rinit
> with active connection called.

thank you very much for this problem report. Now
suddenly PR1202896 ("session still open in rinit")
makes sense.

The basic problem is the same that Bryan has reported,
please see:

http://sourceforge.net/mailarchive/forum.php?thread_id=7884155&forum_id=42415)

Kai has already explained what what __sleep() means
and how to store java objects.

During client/server communication both the client and
the server build a dictionary of (handle . object)
pairs. When you serialize/deserialize a handle without
restoring its server-side meaning the server and
client suddenly use different dictionaries and very
strange things may happen; it is like switching the
language in the middle of a conversiation. In a
sentence like "hier is gift", the server should better
know that "gift" means "poison", otherwise it will get
into trouble when the client asks to handle() it.

Please use $session=java_get_session(<name>) to store
java values.


Okay, now how to handle the problem?  We could
implement the __sleep() and __wakeup() methods and
abort script execution if they are called. But I think
it shouldn't be too diffcult to implement them
correctly: All we need is to move the pair from the
globalRef into the session ref when _sleep() is
called. __wakeup() is a little bit more complicated
because we restore an object which has the old
(client-side view) of the object identity and we
receive an object from the session ref which has the
correct identity.  We must "patch" the restored object
to contain the correct id and then discard the
received object.

I have created a ticket for this: PR1274526.

In the meantime please use java_get_session() to store
your java values.


Regards,
Jost Boekemeier




	

	
		
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