If the message was sent as a "large" message or converted into a large message by the broker (e.g. if it exceeded the journal-buffer-size) then it can be streamed from the broker in chunks via JMS as noted in the documentation [1]. However, if the message is not "large" then the entire message will be transferred to the client.
Justin [1] https://activemq.apache.org/components/artemis/documentation/latest/large-messages.html#streaming-over-jms On Tue, Apr 22, 2025 at 4:14 PM Alexej Timonin <alexejtimo...@gmail.com> wrote: > Hi! > > I'm building a consumer which will be listening on text messages (I've no > control over producers). I want to protect my consumer such that it does > not read messages larger than 256KB to avoid crashing due to memory > limitations. Is there any way in artemis jms client implementation to see > if a text message is larger than given size without having to load it into > memory? > > My understanding is that it's not possible when reading code of > ActiveMQTextMessage, specifically doBeforeReceive method, looks like it > loads the entire message into memory - > > https://github.com/apache/activemq-artemis/blob/6f68668c867b23c7468f85c91c96a74136a561ad/artemis-jms-client/src/main/java/org/apache/activemq/artemis/jms/client/ActiveMQTextMessage.java#L104 > Is my understanding correct? > > Thank you in advance! >
