In the messaging subsystem of jboss there are two possibilities to create a queue:
hornetq-server=default/queue= and hornetq-server=default/jms-queue=
What is the difference between these two queues?
In which case we should use "queue" instead of jms-queue?
Thank you
HornetQ lets you create Core queues as well as JMS queues. The core queues are suported by its own core api and it is importantly non-JMS api.
So if you use core queues you are tied to HOrnetq and lose the advantages of JMS.
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Difference Between Apache Kafka and Camel (Broker vs Integration)
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Closed 5 years ago.
As far as I know, Apache Kafka is asynchronous messaging platform, where as Apache Camel is a platform implementing the enterprise integration patterns.
So, what are the practical differences of Apache Camel and Apache Kafka? We planned to implement the system with Apache Camel, which is relatively easy, but our customer wanted the Apache Kafka instead without rational.
What would be the advantages of choosing Apache Kafka to implement a message queue functionality, which could be implemented with Apache Camel as well? I'm concerned Kafka would just introduce unnecessary overhead to project. Are we comparing apples and oranges?
What we need is straightforward API's to setup and use clustered message queues. Our initial plan was to use Camel to consume/produce on clustered JMS or ActiveMQ queues. How would Kafka make this task easier? The application itself would run on WebLogic server on either case.
The messaging would be point-to-point type, where there are multiple instances of same service running, but only one instance should process the message and emit the result according to load balancing policy. Message queues are also clustered, so neither failure of service instance or queue instance is SPOF.
Camel and Kafka are totally different things. In many use cases, camel is just used as a client of kafka/activemq/... .
Kafka and activemq are similar, but also different things, refer What is the difference between Apache kafka vs ActiveMQ. Kafka has higher throughput, and data always on disk, so a little more reliable than activemq.
Kafka is usually used as real-time data streaming, and in general activemq is mainly used for integration between applications, the book says so. But in most real world cases ,kafka and activemq can replace each other easily.
It is very hard to compare those two. They are not covering the same areas of work, but exist some systems, where you can replace one by the other.
So very shortly.
Kafka is messaging platform with streaming ability to process messages Apache Kafka.
Camel is ETL framework it can transform messages/events/data from "any" (see endpoint list by Camel) input point and send it to "any" output Apache Camel - Enterprise Integration Patterns.
You may use Camel without Kafka at all, and vice versa. But there are of course possibilities to use succesfully both together.
Case 1. You process mail and store in PostgreSQL DB. Kafka is useless
here.
Case 2. You process messages from ActiveMQ and send them to
Kafka. You may use both.
I'm trying to connect to a Universal Messaging queue (by Software AG) via Akka Streams. I have looked in the doc of Akka Streams regarding the Camel integrations, but I'm struggling with understanding how the components fit together. For instance, do I have to use ActiveMQ as a broker?
I have previously set up a connection via MQTT (and Spark's MQTTUtils) but since I want to try out Akka I don't think MQTT via TCP is necessary. [It is recommended}(http://tech.forums.softwareag.com/techjforum/posts/list/55887.page) that I use JMS instead of another protocol, especially with third-party tools. Hence my question regarding the proper setup of Akka Streams to UM via JMS.
The recommendation is to move away from Camel and leverage a fully reactive, akka-streams based solution. The Alpakka project was born to collect akka-streams compatible connectors in one bundle.
It currently contains a JMS connector (as well as AMQP and MQTT connectors). Further info:
Official launch article
Alpakka home
JMS connector docs
How do I configure activemq such that a JMS message published to a topic is passed on to two JMS queue.
Is this possible in activemq?
Or
Is it better to use a simple topic with two subscribers. Both picking up their own copy of a message.
Instead of trying to configure the Broker to do this you are better off using Apache Camel to create the routing behaviour you are looking for. Camel routes can be embedded in you ActiveMQ instance.
I'd like to host apps that uses queue to communicate with each other on OpenShift.
One kind of apps - producers will put some data to the queue and another type - consumer will process the message. My question is how to implement message queue. I've thought about two approaches:
Create an app with JBoss, HornetQ and consumer and create proxy port for HornetQ, so that producers can send messages there.
Create an app with JBoss and consumer, and make a JBoss's HornetQ available to producers. It sounds a bit better for me, but I don't know if I can make queue available to producers and how it works if there are more instances of consumer on different nodes (and different JBoss instances).
I'm not sure how else to answer you besides showing you a link on how to use Wildfly. You can just use the Wildfly Cartridge:
https://www.openshift.com/quickstarts/wildfly-8
If you provide me some extra context I can try to enrich the answer a bit better. I need to know what is your problem, and what's not working.
If you just want to know how to configure Wildfly with HornetQ, the Wildfly cartridge I posted is the way to go.
We have two applications which is running on Weblogic and JBoss AS respectively. We would like to Keep HornetQ as an intermediate server for Asynchronous messaging.
I would like to write a Publish/Subscriber. Whenever a data Inserted/Modified/Deleted(JPA) or whatever possible messages it could be.
Here Producer will be the Weblogic and consumer will be the JBOSS. How can i achieve it?
On wls end define a foreign jms server. Point it to the hornetq topic. Your application on wls will publish
Messages to foreign jms and your application on jboss can consume it.
When defining foreign jms make sure you provide user credentials for both the topic and jndi look up as needed.
I think You could use JMS bridge between wls and JBoss:
http://docs.jboss.org/hornetq/2.3.0.CR2/docs/user-manual/html/jms-bridge.html