message-queue

I have been playing around with RabbitMq.net and the message acknowledgements. If the consumer is able to process the message you can send back an ack in the form of channel.BasicAck(ea.DeliveryTag, false); which will take it off the queue. But what about if the message was unable to be processed ? maybe a temporary outage and you don't want the message taken off the queue just put to the back and carry on with the next message? I have tried using channel.BasicNack(ea.DeliveryTag, false, true); but the next time round its still getting the same message and not moving to the next message in the

During long term operations our C++ Win32 application shows a modal status dialog with a process bar, which is updated irregular every few seconds or so. Starting with Windows 7 we realized that Windows quite soon shows a message " seems to hang..." and/or appends "Not responding" to our window title bar. We figured out that the process dialog must handle messages to avoid this. More specifically it seems that Windows 7 is constantly sending WM_UPDATE messages to check if our program is alive. We formerly had disabled all unneeded message handling in this dialog as profile runs shows that they

I need to peek into a message queue without removing them. I will go ahead and remove the message queue item only if it complies to certain criteria. How to do this? Following are the APIs I know — but none seems support peeking. mq_close() — close a message queue mq_getattr() — get the current attributes of a message queue mq_notify() — notify the calling process when the queue becomes nonempty mq_open() — open or create a message queue mq_receive() — receive a message from a queue mq_send() — put a message into a message queue mq_setattr() — set the flags for a message queue mq_unlink() —

I am new to messaging queues, and right now I am using ZeroMQ on my Linux server. I am using PHP to write both the client and the server. This is mainly used for processing push notifications. I am using the basic REQ - REP Formal-Communication Pattern on single I/O-threaded ZMQContext instances, as they have demonstrated. Here is the minimised zeromqServer.php code: include("someFile.php"); $context = new ZMQContext(1); // Socket to talk to clients $responder = new ZMQSocket($context, ZMQ::SOCKET_REP); $responder->bind("tcp://*:5555"); while (true) { $request = $responder->recv(); printf (

I'm writing messages to a Message Queue in C# as follows: queue.Send(new Message("message")); I'm trying to read the messages as follows: Messages messages = queue.GetAllMessages(); foreach(Message m in messages) { String message = m.Body; //do something with string } However I'm getting an error message which says: "Cannot find a formatter capable of reading this message." What am I doing wrong? macleojw I solved the problem by adding a formatter to each message. Adding a formatter to the queue didn't work. Messages messages = queue.GetAllMessages(); foreach(Message m in messages) { m