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From Craig L Russell <Craig.Russ...@SUN.com>
Subject Minutes: JDO TCK Conference Call Friday, Mar 12, 9 am PST
Date Fri, 12 Mar 2010 18:16:47 GMT
Attendees: Michelle Caisse, Michael Bouschen, Craig Russell

Special meeting time for next week only: 11:00 AM Pacific Daylight Time


1. Query Cancel TCK tests

Andy raised a question that the test case doesn't work for  
implementations that support query cancel. The main thread doesn't  
sleep before canceling the query thread, which probably hasn't started  
executing. We should put a sleep into the main thread after starting  
the thread and before canceling the query. Depending on how this works  
out, we might also need to implement a barrier to make sure that both  
threads are running before the cancel executes. AI Michael update the  
test case.

A second issue is what the scope of the cancel. It might be that the  
user has finished executing the query and has a result that is  
iterating. In this case, the cancel might be useful to cancel the  
execution of the result set iteration. But it's not clear whether the  
underlying implementation can cancel a statement that has finished  
executing. In this case, for both JDO and the underlying  
implementation, the Query (or Statement) is no longer executing. So if  
the Query has given back a result, it can no longer be canceled. The  
user should use a datastore timeout to control iteration of the result.

The question is still whether the caller of cancel should be able to  
know whether the cancel had any effect. It's not obvious that it's  
possible to know with any certainty. The only indication from  
Statement.cancel() is an exception if the Statement has been closed.  
The behavior if the Statement has returned a result doesn't appear to  
be documented. So probably the best we can do is to cancel any  
Statement that we know is being executed, which satisfies the main  
reason for this API.

AI Craig update the specification.

2. Tests in api2 for ... getPersistenceManagerFactory(Map,Map) https://issues.apache.org/jira/browse/JDO-557

The class that needs to be created for the test just needs to  
implement the static method, and not necessarily the PMF interface,  
but it can return a proxy for PMF.

3. Spec updates. Matthew Adams commented that the changed spec seems  
to require a specific state of the instance even if there is an  
existing instance in the cache. AI Craig clarify the spec in this case.

4. Other issues

The behead script that removes the first several lines from  
annotations and enums doesn't work for regular classes and interfaces.  
It would be nice if the script could also support classes and  

Craig L Russell
Architect, Sun Java Enterprise System http://db.apache.org/jdo
408 276-5638 mailto:Craig.Russell@sun.com
P.S. A good JDO? O, Gasp!

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