can we read messages in camunda like we do in Mqueue ? can camunda be a substitute for Apache camel routing framework ?
Camunda is not a integration engine/framework, but it does support Apache Camel integration. Which means, Camunda will use Apache Camel for talking to MQueue.
Regardless, you need to give bit more context. There might not be any need for camunda + camel, Camel will be able to do stuff on its own / you may not need Camel as well. All depends on the details you provide and what you want to achieve.
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As i can't find any component for dubbo in Apache Camel components, who can tell me how to use dubbo in Apache Camel?Provide an example for best.
Could anybody explain how Apache Camel is able to behave as a routing and mediation engine on a JAXRS API?
As far I've being reading about I've not been able to figure out what's it for?
You can consider Apache Camel as a great integration framework. It doesn't provide functionality itself, but it makes easy to glue multiple services and protocols together.
Apache Camel can expose a REST endpoint using the CXFRS component. This means it listens for a REST call on certain endpoint (URL). On invocation it doesn't invoke the implementing bean (service) itself, but executes a defined mediation route (invoke a route with its Exchange object).
It is very useful when you need to integrate multiple services or translate the call to other protocols. You can implement a REST service by a bean itself and it's ok until the bean provides some functionality or data itself. For integration you often need more flexibility to integrate multiple sources and protocols. Then Apache Camel can be much more practical tool.
I saw that HawtIO has a Dashboard that shows the flow of the route into each processor in it and the count for each call made.I checked into the apache Camel,I believe you are reading the JVM for getting the metrics of the Routes and the processors in it but what I don't understand is how are you able to construct this block diagram and the exact flow into each processor..
Can someone help me out with this.I am trying to build a similar UI such as hawtIO for specifically on Apache Camel and I want to know how it can be done?
Hawtio is getting its application insights with Jolokia. Jolokia is providing a HTTP bridge to JMX. So, in other words, all the informations you need are exposed by Camel MBeans via JMX.
So, you have two options to get hold of Camel's JMX info:
base your own UI on Jolokia as well.
go old school and use a JSR-160 connector.
I am still struggling with undertsanding some of Camel's main features and limitations.
My objective is to implement a demo application that can migrate camel endpoints. To achieve this everyone suggested that I should use the camel load-balancer pattern with the failover construct.
To achieve this objective people have suggested Fuse and ActiveMQ. Some have even suggested JBoss, but I am lost.
I understand that Camel needs the an implementation of a JMS server. To achieve this I can use ActiveMQ - a free implementation of a JMS server.
However camel also provies the jms-component. What is this? Is this a client implementation of JMS? If so, should I not be using an ActiveMQ client for JMS? Could someone provide a working example?
With ActiveMQ and JMS understood I can then try to find out why people suggest Fuse. I want my implementation to be as simple as possible. Why do I need Fuse? The Camel+ActiveMQ combination has the load balancer pattern with the failover mechanism right?
I am lost in this sea of new technologies, if someone could give a direction I would be thankful.
Camel provides two components. The first is the jms component, which is a generic API for working against JMS servers. The other is the activemq component, which uses the activemq API for working with activemq message brokers. The activemq component is the default component within things like servicemix/fuse, using an internal broker (not a networked/external broker).
If you are connecting to activemq, you can use either the activemq component or the jms component. The jms component will not start up a broker automatically, you would need to do this yourself.
Fusesource == JBoss Fuse == Apache ServiceMix + some addons. For argument sake, i'm going to refer to all three of these as ServiceMix.
ServiceMix is an enterprise service bus, you can lookup the term on wikipedia if you're not familiar with the concept. It uses Apache Camel to define routes between your components, implementing a number of integration patterns as you so need. ServiceMix deploys by default with Apache CXF, for JAX-RS and JAX-WS services and Apache ActiveMQ, a JMS message broker. Using Camel, you can tell service mix that when a REST API is called, do a series of steps, each step decoupled from the one before it.
JBoss Fuse (the enterprisey, costs money edition) comes with some additional components around fail over. Some of these are present in servicemix (namely, you can run servicemix in a hot stand by mode, waiting for the primary to go down). The Camel load balancer pattern doesn't really mean anything around replication, except that a message coming from one endpoint can be delivered to any of a set of a N endpoints. http://camel.apache.org/load-balancer.html
On the flipside, take a look at ServiceMix's failover http://servicemix.apache.org/docs/4.4.x/users-guide/failover.html
I think based on your question you're referring to system failure failover (needing to work against a new instance), and not a Camel Loadbalancer component (which is likely where the confusion is coming from, on the community side and your side).
start by reading these...Camel In Action, ActiveMQ In Action
Greetings all
I am using Apache Camel and Apache CXF in this example:
http://camel.apache.org/better-jms-transport-for-cxf-webservice-using-apache-camel.data/cxfcamelexample.zip
and I want to use AMQP instead of JMS but I don't know the configuration,
also I need to change the version of QPID client
if anyone can help, this will be great, thanks in advance.
Have you seen the unit test of camel-amqp component?
https://svn.apache.org/repos/asf/camel/trunk/components/camel-amqp/
I don't think the AMQP component which is developed based on Qpid project is matured to a stage where it can work succesfully. There is no good POC supported for this component either. Check http://camel.465427.n5.nabble.com/jira-Created-CAMEL-2872-camel-amqp-not-receiving-messages-td511735.html