I have some subscribers that they are listening to "mytopic"...I send message to them by browser UI just like attached image
but now I want to do this work in code environment
what should I do and whats that code and methods?
-----> attached image
Thanks
You should have mentioned what programming language you want to use. Every language may offer a different API and specification.
In case of using Java, you can simply program according to the JMS specification
https://docs.oracle.com/javaee/7/api/javax/jms/package-summary.html
Also, the Apache ActiveMQ installation comes with a few examples that you can use as a reference. E.g. see
examples/openwire/swissarmy/src/TopicPublisher.java
You should have a look at ActiveMQ Protocols - for example you can use the ActiveMQ REST API to POST messages to the topic or use JMS.
Then you can look at how to use these from a "client" (presumably your central server) perspective.
For REST from Java (say) you could look at this article
Related
I want to set up a bunch of rabbitMQ exchanges and queues together with their bindings trough a Octopus deploy step. We're using NServiceBus and we don't want to give the application too much permission hence it can't set up the stuff itself.
Previously we've had a powershell script for setting up virtual host and users and I've been looking at extending this so that we can create the queues, exchanges and bindings too. This script uses RabbitMQ REST API.
The queues and exchanges can be created without any hazzle but the bindings are another matter. I can't find any suitable documentation about setting this up over HTTP. I've read something that this is not the preferred way to do stuff but what options are available to me given octopus scripting?
The code I want to execute is something like this:
http://localhost:15672/api/bindings/TestHost/e/nsb.delay-level-00/q/nsb.delay-level-00
The exchange is named nsb.delay-level-00 and the queue has the same name. Both exists in the rabbitMQ virtual host.
Any ideas?
I found out that, in contrast to creating queues and exchanges, the method call has to be a POST in this scenario.
So, POST http://localhost:15672/api/bindings/TestHost/e/nsb.delay-level-00/q/nsb.delay-level-00 works fine.
I want fetch the all the available Queues in the one machine using Java API(Spring-AMQP). I didn't find the right API. Can anyone suggest the API for the same.
You have to use the REST API for that; the AMQP protocol itself has no support for it.
Spring AMQP 1.5 (currently milestone 1) has a wrapper for the java REST client - RabbitManagementTemplate or you can use the java client provided by the rabbitmq team directly.
Below HTTP get call will list you all queue
http://localhost:55672/api/queues
List all queues under a particular vhost:
http://localhost:55672/api/queues/vhost_name
Refer the doc for more details.
I have worked on IBM MQ and this is the first project where I am to work on ActiveMQ. After reading basic tutorial I found that both are similar. So I started creating small applications to listen to some queues.
Working with IBM MQ, I used to use RFHUtil tool to browse/send messages to queue which provided features to set message headers as well.
In activeMQ I am sending messages from localhost admin console. I do not find options to set message header from here. For example if I want to set source system in the message header. Is there any way/tool to get this feature on activeMQ?
I like hermes jms
Be sure to pick the Head version if you want support for headers. Its pretty similar to RFHUtil but allows "all" JMS providers.
http://hermesjms.com/patches/
I also made a command line tool for the same task which is handy, called A.
Is there an equivalent to Apache Camel in Rails ?!
I'm creating an application that needs to "listen" to messages from one source (for example: email (POP3)) and sends them to another source (for example: logfile or email (using smtp)).
Any ideas ?
I am not sure about a complete equivalent to Apache Camel. But, to just listen for mails from a POP3 server and send to another source, try the mailman gem
EDIT: You should also look at mailcatcher gem
I am pretty sure there are no ports of Apache Camel to other languages, including ruby (but others as well, there was a question about .net recently). However, you can use Apache Camel with your application. You can treat Camel as an independent daemon that you need to configure and you can do that conveniently via xml. If you need some of your ruby code to be invoked during processing you can use the Camel org.jruby:jruby support. It may be less than ideal, but it works well. To interact with external systems Camel supports a large number of protocols already (including the ones you mentioned), but one could plug in her own.
Given Camel's support for many languages, protocols and data formats, I doubt anybody will go through the significant effort of porting it to other languages, but you never know.
You should definitely look at Llama.
They are in an early stage, but seems like they are going to build "an integration-framework on top of EventMachine that helps with tying together various backend services", which is what Camel is.
I have tried and tested the JMX API and it is pretty simple to use and provides a vast number of statistics required for monitoring ActiveMQ.
But the problem is, i dont want to monitor my ActiveMQ remotely and also i dont want to use another API.To be more precise, i want to use the JMS API itself to get statistics related to various destinations and the broker itself.
Advisory messages seem to be an alternative but they provide limited Amount of Administrative Messages to monitor.
Any input is highly appreciated...
There is no built-in support for this. But you can implement a JMS topic which publishes the monitoring data every few seconds. Make the connection non-persistent so that it doesn't pile up when there are no listeners or when they loose connection.
Now you can write a client that connects to this topic and it will receive updates.
AMQ-2379 resulted in a broker plugin for grabbing statistics from destinations by sending a simple JMS message. Check out the docs that show how to use it here:
http://activemq.apache.org/statisticsplugin.html
The statistics plugin is available in the 5.3 release.
You can checkout this http://issues.apache.org/activemq/browse/AMQ-2379, it will be avaiable in upcoming 5.3.0 release
There's a blog post queued up to go on http://issues.apache.org/activemq/browse/AMQ-2379 - will post it in a couple of days or so