Hi, What is the differece between a dead letter Queue and a back out queue? In WebSpehre MQ terms and in terms of Application Servers. All J2EE app servers have a MQ Provider do they also have a construct of a Dead Letter Queue or is that something specific to WebSphere MQ? My understanding of a back out queue is as follow: If MQ is...
Hello, In my Android application, I have a ListActivity. This ListActivity uses a SimpleAdapter that I fill with items from my service. So, in my code, I do: MySuperCoolService.Binder serviceBinder = null; private ServiceConnection serviceConnection = new ServiceConnection() { public void onServiceConnected(ComponentName classN...
I have an application that uses WebSphere MQ Java API along with a configuration (xml) file to access MQ. I would like to migrate to WebSphere JMS API. For this i try creating 1) WebSphere MQ Queue Connection factory and 2) WebSphere MQ Queue destinations from my local WAS. When i configure my Queue destinations and try to set my MQ Con...
Hi all, I am building a website in CakePHP that processes files uploaded though an XML-RPC API and though a web frontend. Files need to be scanned by ClamAV, thumbnails need to be generated, etcetera. All resource intensive work that takes some time for which the user should not have to wait. So, I am looking into asynchronous processin...
Hi, I receive a message from a WebSPhere MQ queue. I try to process and if i receive some exceptions i want to rollback the message to the MQ Queue. I have no problems in doing the same. What happens to the message? Does it go to the bottom of the queue? If i try and pull a message from the queue would i receive the same message that ...
I went to Jim Webber presentation and in the middle of his apresentation he stated that ATOM is a good replace for JMS in many cases. Since JMS is a messaging service, I'm curious about that. Are you guys using ATOM as a messaging service? Is it reliable and scalable? The greatest advantage of JMS is that it uses the push method (the se...
I have a fresh install of Wesphere 6.1 Fixpack 23. I have an app deployed that requires an MQSeries JMS Queue. I set up an MQSeries provider-based request and reply queue and an MQSeries provider-based queue connection factory. When the deployed app tries to access the queue, I receive the following error. Any assistance would be appre...
We have an application that uses the window message queue to pass data from a socket to consumer HWNDs (at a rate of ~2100Hz). This application has worked for >2 years. Recently our application has started exhibiting problems where WM_TIMER is not being fired/executed by our application. I think this is due to the data being pumped into ...
I have an MSMQ-based system with three layers that communicate with each other. For the sake of simplicity, I'll refer to them as Layer 1, 2, and 3. They sit like this: Layer 1 <-> Layer 2 <-> Layer 3 So Layer 1 talks only to Layer 2, Layer 3 talks only to Layer 2, and Layer 2 talks to both others. I have four queues for this, Layer1...
I'm looking for a message queuing system that runs on windows server similar to jms. ...
IBM MQ uses some strange to me certificate format with kdb extension. How can I open it and change its validity date? ...
We're considering a messaging platform to integrate two core systems in a banking environment. We're looking at open source options. Which products have you used and can you share experiences? ...
I've been playing with message queues (System V, but POSIX should be ok too) in Linux recently and they seem perfect for my application, but after reading The Art of Unix Programming I'm not sure if they are really a good choice. http://www.faqs.org/docs/artu/ch07s02.html#id2922148 The upper, message-passing layer of System V IPC ha...
I've been looking for a good JMS introduction for the person who knows IBM MQ (MQSeries) very well. She is very experienced working with MQ-based systems on mainframe, but she asked me about the overview of the JMS to see how JMS relates to MQ and what is important when implementedin the application using JMS provided by MQ. Any URLs wou...
I'm working on an application that may generate thousands of messages in a fairly tight loop on a client, to be processed on a server. The chain of events is something like: Client processes item, places in local queue. Local queue processing picks up messages and calls web service. Web service creates message in service bus on server...
Clients of HTTP services can specify the version (and format) they understand by requesting or posting data with a specific content type. The HTTP protocol defines error codes for reporting that the content type is not understood. Messaging systems (e.g. JMS, MQ Series and the like) do not have a standard way of describing message proto...
I'm having some trouble putting together an algorithm for an asynchronous queue consumer thread, that is reading items off of a single queue that need to be dispatched to do some long running (several seconds at least) work. Basically the queue can look as follows: A, A, A, A, A, B, B, A, B, A, A, A, A, A, C, B, A. Ie. the A messages a...
I'd like to use actors in a program where I'll have some kind of restriction around treating some of the actors as if they were queues. For example, suppose I have some external system to which change events are applied and also some cache of the external system's data. So I have 2 actors: ChangeApplicationActor CacheActor As part of...
I have created a test service with a method that contains a very long loop. I was hoping that when a timeout transaction occurs, the method execution will flush, but it doesn't. The client gets a timeout, but the processing continues on the server. Is there way to stop it? Without changing the method code? Here is the example: in the ...
I have an application that is based on a message-pump thread-pool archtecture. Whenever there is an action that could block, it is implemented as "callback on complete/trigger evnet" action, so it won't stall the executing thread. While this techniqiue is appropriate for most cases, there are situations when it becomes very inconvinient...