Hi Malte, The traditional solution for this kind of challenge is a message queue. Message queues have two main ways of communicating: - a queue acts as a post-office box: the sender puts a message into the queue and the receiver comes and picks it up at its own pace - a topic is like a radio station: the broadcaster sends its message to multiple listeners but they have to tune in to hear these messages It may sound like a heavyweight solution, but it is rather elegant once you get the hang of it. I feel they're not used often enough because people either don't know or are too scared to use them :-)
Queues are great for batch-processing loads of incoming data without bogging down the sender if the load is heavy. Topics are great for keeping multiple clients updated on changes - so that's what you're looking for. Each client publishes its updates to the topic or topics, and also subscribes to receive the update messages. You could create a single topic for all your application's updates, or divide it up along module lines. So instead of a topic "MegaApp" you could have separate topics for "customer" and "supplier" record updates. And then the clients can subscribe/unsubscribe depending on which part of the user interface is visible. Can you tell I'm a fan of message queues? :-) A popular and open standards-based one is the free Apache ActiveMQ: <http://activemq.apache.org/> One of its protocols is the STOMP protocol which is not that hard to implement with TCP/IP socket communication. I wrote a LiveCode library a few years back, and it worked quite well. But I haven't yet gotten around to finishing it. If you're interested in going this way, I'll dust it off and send you a copy. Maybe this summer I'll find some time to publish it as open source. Jan Schenkel. ===== Quartam Reports & PDF Library for LiveCode www.quartam.com ===== "As we grow older, we grow both wiser and more foolish at the same time." (La Rochefoucauld) ----- Original Message ----- From: Malte Brill <revolut...@derbrill.de> To: use-livecode@lists.runrev.com Cc: Sent: Wednesday, June 6, 2012 11:21 PM Subject: Push notifications on the desktop? Hi all, I have a system that connects multiple clients to a database. I would like all clients to receive a push notification if one of them alters stuff in the DB. Anyone got an idea how to implement this? (I do have a LC server license, so I could use that if necessary) Any pointers / ideas much appreciated! Malte _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
