I'm completely new to message queues, i've been looking at the ActiveMQ and Camel website all day but the concepts are not fully clicking for my specific situation. I've read most of the FAQs but i think i'm still not seeing how everything will fit together. I'd love a link to something to help me understand the protocol some more.
Specifications: Messages will be fairly low rate, I'd estimate at peak times 1 a minute Messages will be fairly large, i'll say average 500kB, up to around 2mB Messages are a combination of an xml document with a byte stream probably encoded into that Right now a single Producer, and 10-20 Locations, in the future 100+ Locations, and a limited number of Producers The Producer is being built by someone else The Locations are C# and behind a firewall where they can connect out, but i cannot connect in Many terms are confusing me still I don't really understand the virtual destinations and such When a queue is "foo.bar" is that a subset of "foo" ? Questions (see image below): 1. Is there any difference in the connection between Topic and Queue? a. Is it a persistent connection or will I code my client to connect into the broker every 5 minutes to check if the queue has anything? b. Or does the broker connect into the client when a message is put into a queue? (if this is the case my custom filtering/queue piece would have webservices the clients will connect to) 2. To filter/distribute the messages, would either of these be worse?: a. asking the producer to put each location's messages in a different queue b. Or have selectors on each Location pointing to the same queue? c. Or have the producer put it into a single queue, and have forwardTo filteredDestination split it into different queues? d. Is filtering using an XPath on the xml message body horribly inefficient? 3. If i want to do these things, would ActiveMQ be able to accomplish these/would Camel? a. Put a copy of each message into a database for indefinite storage b. Add in new Producers sending messages from other common languages (giving this portal out to new customers that will send information down to our Locations) 4. If I were to start with ActiveMQ, would i be able to switch to Camel fairly easily in the future? Or at least without having to ask the developers of the Producer to change their code? Thank you for reading your message and any help you can give me. http://old.nabble.com/file/p27711311/MessagingLayouts.png -- View this message in context: http://old.nabble.com/Design-and-ability-questions-%28multiple-questions%29-tp27711311p27711311.html Sent from the Camel - Users mailing list archive at Nabble.com.
