On 7/9/07, happyAMQ <[EMAIL PROTECTED]> wrote:
This sounds ideal. Can you point me to some docs on how to write a plugin?
Here's some documentation... http://activemq.apache.org/interceptors.html http://activemq.apache.org/developing-plugins.html its probably easiest to look at the code for some existing plugins to get the idea. I think this will be a useful addition; do you fancy contributing your plugin to the project? http://activemq.apache.org/contributing.html
Would I be using the same JMX method to delete the destinations in this plugin?
You could do; though a BrokerPlugin has access to the real broker... http://activemq.apache.org/maven/activemq-core/apidocs/org/apache/activemq/broker/Broker.html so you can tinker directly with whatever you like. Note that its the getDestinationMap() you'll be using on the base Region interface to introspect the available Destination objects, to get the DestinatioStatistics (to check for empty queues with no consumers). You probably wanna keep a cache in your plugin; for each destination cache the enqueue counts for empty destinations with no consumers. In pseudocode... onTimer() { for (Destination d) { if (d.destinationStats.messages == 0 && d.destinationStats.consumers == 0) { enqueueCount = cache.get(d); if (enqueueCount != null && enqueueCount == d.destinationStats.enqueueCount) { // no activity within a timeout period so lets delete removeDestination(d); } if (cache.contains(d)) { So that each time a timer fires, you can look for all empty destinations with no consumers; if you've cache; so that when each
Thanks! Jason. --> Another option is to write a little broker plugin to eagerly delete any broker-side destinations which are not being used by any clients within some time period. e.g. if no client uses a particular destination within say 10 seconds (and the destination is empty), then just zap it. -- James ------- http://macstrac.blogspot.com/ -- View this message in context: http://www.nabble.com/Temporary-destinations-with-given-destination-name-tf4037658s2354.html#a11511275 Sent from the ActiveMQ - User mailing list archive at Nabble.com.
-- James ------- http://macstrac.blogspot.com/
