message-queue

I am a student and a begineer in C. I want to implement 2 way communication using message queue in C linux. Do I need two queues or only one to get this done? Also I would like to know can I send data(shown in code) to another process or i need to declare it as a character array. typedef struct msg1 { int mlen; char *data; }M1; typedef struct msgbuf { long mtype; M1 *m; } message_buf; Thanks in advance :) Also I would like to know can I send data(shown in code) to another process or i need to declare it as a character array yes you can send data to another process like #include <sys/types.h>

I've been reading on the Event-Driven Message Programming Model introduced in April 2013, the OnMessageOptions.ExceptionReceived Event , the built-in RetryPolicy (May 2013, RetryPolicy.Default), The Transient Fault Handling Application Block (2011) which is outdated, and more (see bottom). I've been monitoring the exceptions received through the message pump for transient errors and I get daily MessagingCommunicationExceptions . This article (Updated: September 16, 2014), recommend the following : This exception signals a communication error that can manifest itself when a connection from the

I was wondering which of my two methods is more appropriate, or is there event another one? (1) Direct Direct communication between GATEWAY and μSERVICE A UI sends HTTP request to GATEWAY GATEWAY sends HTTP request to μSERVICE A μSERVICE A returns either SUCCESS or ERROR Event is stored in EVENT STORE and published to QUEUE PROJECTION DATABASE is updated Other μSERVICES might consume event (2) Events Event-based communication via a message queue UI sends HTTP request to GATEWAY GATEWAY published event to QUEUE μSERVICE A consumes event Event is stored in EVENT STORE and published to QUEUE

What is the correct syntax for selecting messages based on their corresponding JMS ID? Currently I use: String selector = "JMSMessageID='ID:305:1:5:1:1'"; messageConsumer = session.createConsumer(getRetryQueue(), selector); The above syntax works in test with a mocked broker. But towards ActiveMQ the messages are not polled. Original code: @Override public Message readMessageFromRetryQueueByJmsId(String jmsId) throws QueueingException { Connection connection = null; Session session = null; MessageConsumer messageConsumer = null; Message message = null; try { connection = getConnectionFactory()

What we need is RabbitMQ that actually works as a queue and doesn't do this . Messages should stay at the head of a queue untill client dequeues them explicitly. It seems like a very straightforward scenario, but for some reason I can't find any broker to support it.. A broker should run on Windows OS. Apache Qpid is probably your best option. Of all of the message queues, this one has a number of interesting things going for it, including strict ordering . If it is only one message that is the problem, why not write it to a file (and flush the file) before you process the message. After

Right now I am doing Process ! Message, but as i googled a bit, a message queue size is only limited to memory. I have a tree of processes where leaves generate messages and feed up to the root and i need to limit queue or switch to some another method of doing the same. more of it, sometimes Process gets messages from one leaf and sometimes from two leaves. In the second case I need different finite queues for eave leaf. There are no built-in mechanisms to limit the size of the message queue for a process. The usual solution to this problem in erlang is to introduce a flow control protocol

Can some one tell me how to check if there is any message in message queue. the message queue is implemented in C in linux based operating system. I just want to check if there is any message in the message queue at a particular time. Just checking the amount (if any) of messages is done using the msgctl() function, and examining the msqid_ds structure on return, the msg_qnum in this structure is the amount of messages in the queue. Here is a link with an example: msgctl example , it does more then you want, but after the msgctl() call you just have to check that field in the structure I