Writing to sample container xml statefile

[Chris Chabot]

Hey Guys,

Finishing the last bits for the socialdata work on the PHP side, and  
only a tiny bit away from a fully functioning implementation.

However part of the test i'm using (http://opensocial-resources.googlecode.com/svn/tests/trunk/compliancetests.xml 
) requires data to be written as well to get a green across the board  
compliance status.

Now on the java side this has been done by keeping the person app data  
in memory, which of course means when jetty is restarted its lost,  
which is probably what you want in a sample container kind of  
situation. However in PHP land i'm stuck in a multi process model with  
no persistent shared memory (unless i would want to add arbitrary  
extra layers to the whole thing, which i don't).

So instead i opted for actually writing the new data (or replacing if  
it existed) to the state file (state-basicfriendlist.xml), this way  
any consequent reads of the data can actually succeed, and i get green  
fields across the board in the compliance test :)

It could well be possible that some people might be playing with both  
the PHP and Java versions and examples / samplecontainer etc, and i'm  
lacking the insight to know if this could somehow affect the Java side  
of things. Presumably not, especially because at some point of the  
future this code will be scrapped and replaced with the REST interface  
but it felt better to double check :)

        -- Chris