Hi Rob, & thanks for the info. That post references a doc that I can't find, http://svn.apache.org/repos/asf/incubator/activemq/trunk/activemq-core/src/test/java/org/apache/activemq/broker/jmx/MBeanTest.java
I'm not sure if the bean mentioned in http://activemq.apache.org/jmx.html gives the messages that have been "not committed/consumed yet" (if a message has been delivered, but the client has not yet committed, I need to count that as "still unfinished") The original post also mentions "Or you can just grab a reference to the ActiveMQ Broker object itself and navigate that if you are in the same process." Is there something simple I can do to a broker to make it realize when a queue has become empty and have it send a message? (I would need it to test if some "TestForEoq" flag is enabled; I would disable it while writing tasks to the queue). Alternately, I can write a "test for end of queue" message at the end of writing all the tasks for a queue, and whoever consumes that message would check the queue, if it's not empty, write another "test for end of queue" message (preferably with a "delayed delivery", if ActiveMq allows that now; JBOSS seems to allow delayed delivery of individual messages, but I haven't found anything simple in ActiveMq). I'm new to ActiveMq, and am not sure what paths are easiest. Any help would be greatly appreciated! rajdavies wrote: > > > On 9 Aug 2009, at 15:32, amp834 wrote: > >> >> I'm using ActiveMQ to "Submit a job" to queue "Job53" (a queue for >> each job), >> with (say) 500 subtasks, and want to know when the 500 items have been >> processed completely. I thought of creating a queue just for that >> job, >> writing 500 messages to it, and when the 500 messages have been >> processed, >> the job is done. >> >> Is there a way to tell if a queue is empty? (no messages in the >> queue, no >> messages that a consumer has taken but has not finished processing)? >> >> I found an old post, but it's so old that I thought I'd ask the >> question >> again. >> http://www.nabble.com/Query-the-number-of-messages-from-a-Queue-to3652780.html#a3653404 >> >> -- >> View this message in context: >> http://www.nabble.com/How-to-tell-if-everything-in-a-queue-has-been-processed-tp24887648p24887648.html >> Sent from the ActiveMQ - User mailing list archive at Nabble.com. >> > > > You can either use JMX - as the old post suggested - or enable message > consumed advisory - to get informed out when a message has been > consumed from the queue - see > http://activemq.apache.org/advisory-message.html > > cheers, > > Rob > > Rob Davies > I work here: http://fusesource.com > My Blog: http://rajdavies.blogspot.com/ > I'm writing this: http://www.manning.com/snyder/ > > > > > > -- View this message in context: http://www.nabble.com/How-to-tell-if-everything-in-a-queue-has-been-processed-tp24887648p25383479.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.
