increasing number of queues degrades performance?

Hi all, As part of an Univ. project, we developed a small architecture: - Clients=N (JMS producers) sends query requests - ActiveMQ Topics L=queue size P=# of queues - Processors=M (JMS clients) execute and sends query results - PostgresQL were we would vary these variables and observe the thr

Re: How to limit queue by number of messages

Hello, I bumped into this same issue but I know apriori the number of consumers M that I was going to have so to limit the overall queue size L you configure the constant size limit X to: X = L / M; meaning the size you actually want divided by the number of consumers. This is a workaround but

hacking 5.2.0 TopicSubsciption but can't get hold of the Session

hi all, I was previously asking how to extend the constant message pending limit strategy to send a custom "discarded" message to the replyTo field of the old message before discarding it so a blocked sender can be released. This architecture in general does not make much sense on top of JMS ...

creating custom Limit Strategy

Hello, I need a variant of the existing constantPendingMessageLimitStrategy that extends it in functionality so it would not only discard messages but also "let the publisher know" that the message has been discarded. This I can do by replying to the replyTo queue assumed to be contained in the m

blocking request-response with JMS and constant size limit strategy

Hello, I implemented a request-response project that runs on top of ActiveMQ. I used the following code as starting point: http://activemq.apache.org/how-should-i-implement-request-response-with-jms.html The problem here is that my request-response has to be blocking i.e. the producer has to blo

Re: createTopic on the fly specifying constantPendingMessageLimitStrategy

Gary Tully wrote: > > The constantPendingMessageLimitStrategy is only applicable to topics. For > queues, there is no way to have excess messages auto discarded except > through message expiry. > Will a topic work for your use case? > Hi Gary, Many thanks for your reply. Indeed I said queues i

createTopic on the fly specifying constantPendingMessageLimitStrategy

Hello, I create queues on the fly meaning they get created as soon as I start publishing messages. That's fine now the problem is that I can't find the way to specify the constantPendingMessageLimitStrategy as I need these queues to be of a specific size (messages should be discarded). e.g. thi