ThreadLocal bound DataContext is not obtainable in a multi-thread for a request
environment such as ZK
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Key: CAY-791
URL: https://issues.apache.org/cayenne/browse/CAY-791
Project: Cayenne
Issue Type: Bug
Components: Cayenne Core Library
Affects Versions: 2.0 [STABLE], 3.0
Environment: ZK Ajax framework and any other multi-thread per request
environment
Reporter: Steve Wells
Assigned To: Andrus Adamchik
Having hit my first roadblock now is getting DataContext, as each ZK request
runs in a separate thread (see:
http://www.zkoss.org/smalltalks/zkacegi/zkacegi.dsp ) I think this is the
problem why I can't get DC with WebApplicationContextFilter and
DataContext.getThreadDataContext (). I get "IllegalStateException: Current
thread has no bound DataContext."
Looking into src for DataContext I see this comment // TODO: Andrus, 11/7/2005
- should we use InheritableThreadLocal instead?
So I subclassed DataContext and overrode the :
ThreadLocal threadDataContext
to be
InheritableThreadLocal threadDataContext
changed WebApplicationContextFilter to call my subclassed DataContext and it
works.
HOWEVER! This possible solution may be dangerous and currently needs more
investigation.
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