João Santos created ARTEMIS-2891:
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Summary: Allow configuring stompConsumerCredits variable from
client side (consumer)
Key: ARTEMIS-2891
URL: https://issues.apache.org/jira/browse/ARTEMIS-2891
Project: ActiveMQ Artemis
Issue Type: Improvement
Components: STOMP
Reporter: João Santos
Assignee: Justin Bertram
_ActiveMQ_ possesses a _consumer.prefetchSize_ client-side configurable
parameter (via STOMP headers) which provides a way to configure the amount of
messages which can be retrieved by the client without acknowledging the message
reception.
Current implementation of _Artemis_ does not allow this behavior and instead
only allows to set the _stompConsumerCredits,_ the maximum size in bytes which
may be received by the consumer as messages, from server-side configuration in
broker.xml. This represents a functionality loss for customers migrating from
_ActiveMQ_ to Artemis as _stompConsumerCredits_ works based on message size in
bytes and not message units and since it is not configurable via client-side
STOMP headers.
This is unexpected since a consumer, depending on the processing, might want to
retrieve a batch of messages in order to bulk process them for better
performance (_i.e._ retrieving log messages from queue and storing them into a
database, bulk inserting will be much faster than 1 by 1 inserts). In other
cases, the consumer might want to only receive one message at most before
acknowledging and so this parameter should be configurable from client-side in
order to better adapt to the consumer processing and to achieve a more complete
feature parity with _ActiveMQ Classic_.
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