Fraser Adams created QPID-4543:
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Summary: QMF queueMoveMessages method returns "InvalidParameter"
exception when there are simply no messages available to move from the source
queue - this is confusing.
Key: QPID-4543
URL: https://issues.apache.org/jira/browse/QPID-4543
Project: Qpid
Issue Type: Bug
Components: C++ Broker
Affects Versions: 0.18
Environment: QMF
Reporter: Fraser Adams
Priority: Minor
QMF queueMoveMessages method returns "InvalidParameter" exception when there
are simply no messages available to move from the source queue - this is
confusing.
Other queue management commands (such as purge and reroute on the queue object)
don't object when there are no messages to move but queueMoveMessages barfs
with InvalidParameter.
This is inconsistent and it's pretty unhelpful, I spent about an hour checking
over my code and looking through the broker code thinking I'd messed up the
arguments. When I finally got round to actually adding some messages "just to
see" it actually worked. Perhaps I should have tried that sooner, but as I say
purge and reroute don't behave this way so it was fairly reasonable to assume
I'd done something wrong...
I personally think that queueMoveMessages should behave the same as purge and
reroute and attempt to move whatever. It should only send back InvalidParameter
if one of the parameters is actually invalid. It could be argued that trying to
move zero messages is invalid, but a qty value of 0 means "all messages" and
all of zero is zero.
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