... not part of the Camel 2.0.0 Javadocs ...
Claus Ibsen schrieb:
On Fri, Nov 20, 2009 at 10:36 AM, Claus Ibsen <claus.ib...@gmail.com> wrote:
On Fri, Nov 20, 2009 at 10:35 AM, Martin Krasser <d...@martin-krasser.de> wrote:
I know that when I don't declare the local exception handler a rollback will
occur. But how can I handle the exception for returning a custom response to
the sender AND rollback the transaction? Maybe I'm missing something obvious
(?).
Use markRollbackOnly()
In fact the DSL have javadoc you know so try looking there also :)
But this use case will definitely also be in my book, as I currently
write on chapter 9 about transactions.
Claus Ibsen schrieb:
On Fri, Nov 20, 2009 at 10:20 AM, Martin Krasser <d...@martin-krasser.de>
wrote:
I'm using the TransactionErrorHandler of Camel 2.0.0 and observe an
unexpected transaction-outcome for handled errors. Using the
TransactionErrorHandler with the route
onException(Exception.class).handled(true).process(...);
from("direct:test").transacted().processRef('myFailureProcessor');
does actually a *commit* on the transaction manager (... the
mayFailureProcessor bean simply throws an Exception). Here I'd definitly
expect a rollback. I also tried to make an explicit rollback in the
exception handler:
Yes of course it will commit because you have the local
onException(Exception.class).handled(true) which intercepts the
exception and handle it.
Remove it all together and the transaction will rollback.
onException(Exception.class).handled(true).process(...).rollback();
from("direct:test").transacted().processRef('myFailureProcessor');
This rolls back the transaction but a new exception is thrown
(TransactedRuntimeCamelException). This is somewhat unexpected too
because
handled(true) is used.
No it not because you add the rollback() in the end which causes a new
exception to be set and rollback the transaction anyway.
Is this really the intended behaviour of the TransactionErrorHandler or
is
it a bug?
No its not a bug. You can mix and match transacted routes with the
error handling in Camel using the onException clauses.
However in most cases with transacted routes you would normally not
use onException() but they are at your disposal if you need fine
grained control.
Or even want local retry in a transacted route, e.g. try uploading to
FTP server 3 times etc.
Thanks,
Martin
--
Claus Ibsen
Apache Camel Committer
Author of Camel in Action: http://www.manning.com/ibsen/
Open Source Integration: http://fusesource.com
Blog: http://davsclaus.blogspot.com/
Twitter: http://twitter.com/davsclaus
