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From Joseph Weinstein <joe.weinst...@oracle.com>
Subject Is setQueryCache() broken, and how to fix?
Date Mon, 02 Mar 2009 17:54:17 GMT
Hi all, I am starting my climb to being able to fix OpenJPA bugs,
and would like anyone's opinion on a case I want to fix or at least
explain.
  My current problem involves a case where the application code wants
no query cache, and causes setQueryCache(false) to be called, reaching
class

org.apache.openjpa.jdbc.kernel.JDBCFetchConfigurationImpl

Note that QueryCache is set to true in the properties file. Then the
code executes a query, and during the query, and during it's processing
I nevertheless see caching:

     [java]     at org.apache.openjpa.datacache.ConcurrentQueryCache.putInternal(ConcurrentQueryCache.java:124)
     [java]     at org.apache.openjpa.datacache.AbstractQueryCache.put(AbstractQueryCache.java:115)
     [java]     at org.apache.openjpa.datacache.DelegatingQueryCache.put(DelegatingQueryCache.java:124)
     [java]     at org.apache.openjpa.datacache.QueryCacheStoreQuery$CachingResultObjectProvider.checkFinished(QueryCacheStoreQuery.java:561)
     [java]     at org.apache.openjpa.datacache.QueryCacheStoreQuery$CachingResultObjectProvider.next(QueryCacheStoreQuery.java:593)
     [java]     at org.apache.openjpa.lib.rop.EagerResultList.<init>(EagerResultList.java:35)
     [java]     at org.apache.openjpa.kernel.QueryImpl.toResult(QueryImpl.java:1219)
     [java]     at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:987)
     [java]     at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:796)
     [java]     at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:766)
...

If I totally turn off caching in the config, we use a 
org.apache.openjpa.jdbc.kernel.InstanceResultObjectProvider
being used, not a QueryCacheStoreQuery...

So how should the no-cache state in JDBCFetchConfigurationImpl
have reached/affected the query processing?

thanks in advance for your expertise,
Joe Weinstein at Oracle


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