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Ted Ross updated DISPATCH-5: ---------------------------- Reporter: Sean Gallagher (was: Ted Ross) > Execute a program when a message arrives addressed to a specific address > ------------------------------------------------------------------------ > > Key: DISPATCH-5 > URL: https://issues.apache.org/jira/browse/DISPATCH-5 > Project: Qpid Dispatch > Issue Type: Improvement > Reporter: Sean Gallagher > Priority: Minor > > Start a server (if not already running) when a message arrives at a > pre-configured address. > Broadly similar in intent to xinetd or http CGI scripts. > My application has some large jobs that execute infrequently. It would be > good if these could be run on demand rather than keeping a large process in > memory that does nothing most of the time. Having the server restart when > needed is also a good guard against resource leaks / selfish garbage > collectors. > There doesn't seem to be a convenient way to do this at present but I'm > thinking it might be added relatively easily to Dispatch Router and I suspect > many would find it useful. > Working out locks / race conditions would be tricky but one simple idea I had > would be to execute a user-supplied command line when a message arrives and > then lockout further invocations for a configurable time period. This would > give the new server time to startup and connect to Dispatch. Dispatch would > not invoke the command if a link was available to deliver the message. > A section could be added to qpid-dispatch.conf to configure this. e.g. > on-demand > { ## ## deliveries to this address will trigger the command if link does not > already exist ## to: myserver/myservice ## ## command line to run ## run: > myprogram ## ## delay after triggering the command before it may be retried > (in response to a new delivery) ## lockout-interval: 60 } > This idea could be further developed in many directions, what I've put here > is the basics. -- This message was sent by Atlassian JIRA (v6.1.5#6160) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@qpid.apache.org For additional commands, e-mail: dev-h...@qpid.apache.org