Under what circumstances can there be a transaction which invokes
TransactionDelegate but no context at that time
DataContext is not bound to the current thread by default. User has
to enable this behavior, e.g. by using the filter:
http://cwiki.apache.org/CAYDOC/web-applications.html
Essentially 'getThreadDataContext' it is not related to a
transaction. It is used in this example only because (if configured)
it allows a shared delegate instance to do work without knowing
anything about the surrounding environment.
1. willCommit() appears to run even on a query to the database, not
just when committing data. But perhaps this is just a naming thing.
This is the expected behavior. Cayenne starts an internal transaction
on all Queries passed through DataDomain, including selects.
Andrus
On Sep 17, 2006, at 10:51 PM, Aristedes Maniatis wrote:
We have implemented a TransactionDelegate as per the instructions
on http://cwiki.apache.org/confluence/display/CAYDOC/Understanding
+Transactions We are however, finding some problems:
1. willCommit() appears to run even on a query to the database, not
just when committing data. But perhaps this is just a naming thing.
2. We are getting an exception on the line of code "DataContext
context = DataContext.getThreadDataContext();"
java.lang.IllegalStateException: Current thread has no bound
DataContext.
Under what circumstances can there be a transaction which invokes
TransactionDelegate but no context at that time?
Ari Maniatis
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