Tagged Questions

"Message queue" is a design pattern or software engineering component that defines discipline or API for communication between two or more interrelated processes or systems. The message queue enforces asynchronous processing and loose coupling. Depending on the implementation they may also provide ...

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MassTransit MSMQ remote queues not reachable

We've developed a MassTransit based demo which is working well as long as all processes run on the same server. However, as sonn as my receiver wants to subscribe himself at another machine it hangs ...
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1answer
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Which data type should send to AMQP broker (like RabbitMQ)

I can't decide this. Should I sent only just database row ID or full database object as a message to RabbitMQ. The first choice is good for queueing but require to fetch database rows to process it ...
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How to monitor and avoid over-filling a message queue (posix)

I'm trying to avoid overfilling the message queue so here are few questions I have When using mq_attr When is mq_curmsgs full? when it's 0 or max_msgs When it's full, do i need to flush it? Would ...
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Message queue in java

I am looking for a message queue system in java which has following properties. High availability/No single point of failure (Ability to use cassandra as backend) Ensure "deliver once and exactly" ...
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2answers
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What is the point of the immediate multiple retries in messaging systems?

I've recently been reading up on messaging systems and have specifically looked at both RabbitMQ and NServiceBus. As I have understood it, if a message fails for some reason it is tried again ...
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27 views

Implementing queues using SQLite database in Android

I want to implement queues in one of my app. I've been investigating few options like file based queues and database queues. File based doesn't look like a right choice when data grows really big. I'm ...
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29 views

Are there any free or open-source persistent publish/subscribe (PPS) systems?

I've been working with QNX lately and found their Persistent Publish/Subscribe (PPS) to be very useful. Does anyone know if there are any systems that are similar to QNX PPS that might work with the ...
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1answer
14 views

Django-celery doesn't restore all tasks after restart

I'm using django ORM as a celery broker, when I schedule tasks and kill celery worker (by hitting ctr+c) before tasks completion, and restart celery again, it doesn't restore all the tasks!! why is ...
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26 views

POSIX Message Queue is supported on which linux Kernel

I could successfully implement POSIX Message Queue on Ubuntu 10.04 (Kernel version 2.6.38). But the code fails when (built and) run on same version of Ubuntu 10.04 (Kernel version 2.6.37) on ARM ...
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ServiceStack: repalce web service with message queue

I'm working on a project that provides some API for getting information about our partners' products. Every search request to our site has to make n other requests to partners sites, collect and ...
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1answer
44 views

Send data to another process

I have to make a C program in unix. I have to simulate the results tables of a car race, I already made a code to create some cars (with a fork) and now I'm trying to send the results to another ...
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No single point of failure realtime messaging system?

Is there anything out there that is like a Cassandra, but in the world of realtime messaging? Relatively simple API would be a plus, HTTP maybe, something as Amazon SQS?
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28 views

Android: How to Switch on Runnable in Message Queue?

I have searched the java API on Thread, Handler, HandlerThread, Looper , as well as SO, and cannot find an answer. Of course, I have also used Eclipse's debugger to step and inspect my 'msg'. ...
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35 views

rabbit mq message listener

Im using @Autowired RabbitTemplate temp; temp.convertAndSend("aQueue", msg); for sending and @Autowired RabbitTemplate temp; return temp.receiveAndConvert("aQueue"); for receving ...
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1answer
41 views

Is there a way to deserialize raw byte[] back into thrift object without knowing its thrift type?

I'm running a project that requires inter-communication between different programming languages (mostly java, c++). could serialize/deserialize into both binary format and json format. IDL to ...

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