We are currently using JMS queue in Weblogic.
Can we use same JMS queue in Websphere as part of weblogic to websphere migration.
Is there any other concept available in websphere which can replace JMS queue?
WebSphere Application Server has a built-in JMS provider, due to the Java EE standard which defines it as mandatory (as Arjan Tijms already stated).
Setting up the JMS provider requires a so called Service Integration Bus, which is a simple Messaging Bus inside WebSphere. The Service Integration Bus also allows to setup High Available JMS queues/topics when using WebSphere Application Server Network Deployment.
Using this queues/topics outside of a WebSphere context - by putting messages into the queues from external clients or reading them from external clients - is hard.
Mainly due to the WebSphere internal CORBA communication it is quite tricky to setup a working and stable
configuration - and you need to know some internal WebSphere tricks.
My recommandation is to use internal jms configuration only for applications which are deployed on the same WebSphere Application Server-Configuration.
If you really need external access to the JMS queues/topics, you should write a adapter to access it.
This blog post describes in detail how to setup a simple WebSphere internal JMS configuration.
WebSphere has indeed an internal JMS provider. It's accessed using the SIB (Service Integration Bus). See http://www.packtpub.com/article/messaging-with-websphere-application-server-7.0-part1
WepSphere has JMS queues as well. Are you wanting to have the queue running within WebSphere, or are you trying to point to a queue running elsewhere?
Yes, you can.
Configuration depends on your JMS System.
If your JMS Middleware is running external like ApacheMQ or Swift JMS, you can normally install an Resource Adapter and then use that specific configuration (at least for the Jms configuration). Then you can use Websphere's JMS Configuration (like Queues and Topics) and therefor your normal MDB configuration.
Besides ActivationSpec (like above) at least with Websphere MQ you could use Listener Ports. I don't know if Listener Ports are available for other JMS Products.
If you want to use a built in Messaging System, you can use SIB I guess.
So plenty of options depending on your System.
A JMS provider is mandated by the Java EE specs so every application server has an inbuilt JMS Provider.
You have to make the right calls about your application needs. There might be valid reasons to use an external JMS provider such as WebSphere MQ.
Related
Currently in Weblogic we are running two applications and communicating through JMS Queue. Now one of the application we are moving to Liberty Server. What are the configuration we need to do for JMS Queue connection between Weblogic and Websphere.
Depending on which JMS Provider are you using, you have several options:
if provider has compatible JMS Resource Adapter (e.g. WebSphere MQ) - you can use that RA together with Liberty jca feature
if provider has a sort of thin client, you can embed that client libraries together with your application, and manually setup connection
if your current provider doesn't support any of above, you can use external JMS server that has compatible JMS RA (for example WebSphere MQ) and integrate it with both WebLogic and Liberty.
Update based on comments
There is no simple way to access Liberty JNDI externally - see this post Connect to Websphere Liberty jmsServer from remote application server
You could try to access embedded JMS via API. It is discussed here: https://www.ibm.com/mysupport/s/question/0D50z000062ktc3CAA/helloworld-jms-client-connecting-to-embedded-liberty-jms-server?language=en_US
But to be honest, if I were you I would either:
use external JMS Provider that is compatible with both runtimes e.g. WebSphere MQ
or rewrite interface between WebLogic and Liberty to REST, so that WebLogic invokes via REST simple application that reads the request and puts it to the queue in embedded Liberty JMS engine to avoid calling JMS engine externally.
I know that Apache Camel is java open source framework and Jboss Fuse is ESB which act like container to bind camel into its container . However i need to know its differences in some more depth .
Any help will be appreciated .
In simplified terms, camel framework is the set of api's (java code) which are used in system integration projects whereas fuse is the server like tomcat where code is deployed.
"JBoss Fuse combines several technologies like core Enterprise Service Bus capabilities (based on Apache Camel, Apache CXF, Apache ActiveMQ), Apache Karaf and Fabric8 in a single integrated distribution."
Deploy applications utilizing some different configurations and technologies is one of many qualities in Jboss Fuse.
"Camel" as being a rule based routing & mediation engine which can be used inside a full blown ESB, a message broker or a web services smart client. Though if you want to, you could consider that Camel is a small, lightweight embeddable ESB since it can provide many of the common ESB services like smart routing, transformation, mediation, monitoring, orchestration etc.
We should also mention what Camel isn’t. Camel isn’t an enterprise service bus complete(ESB ), although some call Camel a lightweight ESB because of its support for routing, transformation, monitoring, orchestration, and so forth. Camel doesn’t have a container or a reliable message bus, but it can be deployed in one, such as Open-ESB or ServiceMix. For that reason, we prefer to call
Camel an integration framework rather than an ESB.
Some third party JMS providers do not provide a JMS JCA resource adapter for JBoss. In that scenario there is an alternative way to set up a generic JMS resource adapter in lieu of a custom one provided by the provider:
https://access.redhat.com/documentation/en-US/JBoss_Enterprise_Application_Platform/6.2/html/Administration_and_Configuration_Guide/Configure_a_Generic_JMS_Resource_Adapter_for_Use_with_a_Third-party_JMS_Provider.html
What are the implications of this? What are the gains of using a provided resource adapter other than simpler configuration and what do JMS providers look for when creating these?
My experiences:
NIRVANA
I configured jms generic resource adapter for JBoss 7.1.1 and Universal Messaging Nirvana, the abstraction is guaranteed and communication works fine. But i've a memory lack issue when the connectivity is absent.
These problems are solved when the broker provides own JCA resource adapter. There are more optimizations in that way.
WMQ
For WMQ all works fine and there aren't any issue, using "wmq-ra.rar".
For information on configuring the RA inside JBOSS please look at
http://www-01.ibm.com/support/knowledgecenter/SSFKSJ_7.5.0/com.ibm.mq.dev.doc/q031820_.htm
I am new to JMS and WAS. I am grateful if someone provides any reference that helps me to create a web application in eclipse with JMS and WAS 7.0.
Also want to get answers for below questions..
How to inject ConnectionFactory or Destination object (created in WAS) into application using jndi?
How to install and run JMS web application on WAS server?
First you need to decide on the provider for JMS. It could be WebSphere MQ, the JMS provider that comes inbuilt with WAS or some other provider too.
Refer to the redbooks https://www.redbooks.ibm.com/Redbooks.nsf/RedbookAbstracts/sg247770.html?Open.
You can use InitialContext to lookup connection factory and Destination.
You can deploy the JMS app just like any other app. But ensure that JNDI objects are configured.
This is also a nice info-center to use for reference: http://pic.dhe.ibm.com/infocenter/prodconn/v1r0m0/topic/com.ibm.scenarios.wmqwasusing.doc/topics/scenario_overview.htm
I am using Jboss5.1 and I have a EAR1 deployed which has a EJB3 component implemented using #Stateless annotation and the same EJB is also exposed as webservice using the annotation #webservice.
I want to check through a EJB service/management service bean(Packaged in another EAR2) from the start of deployment to un-deployment of EAR1 PERIODICALLY, if the EJB and Webservice is deployed and running properly and working normally and is not in deadlock/non responsive state.
I have looked into JMX and I am able to get notifications of create and destroy for EJB as well as webservice, but how to check periodically whether the EJB and webservice is working normally and is not in deadlock/non responsive state?
Also how to monitor Jboss ESB services?
Is the JMX is the only way or does jboss provides any other API's to do monitoring how about JBOSS MONITORING
Thanks in advance if you are looking at this.
Especially JBoss AS5.x is using the so called profile service (PS) as the main way to interact with the server. Unfortunately the PS is not JMX-based and on the other side you don't see all EJBs in the Platform MBean server.
RHQ has a plugin to monitor EJB instances inside AS5 as well as for other resource types like JBoss ESB or Apache Tomcat and is able to determine the availability of EJBs.
but how to check periodically whether the EJB and webservice is
working normally and is not in deadlock/non responsive state?
This is usually something that you can (only)(*) determine by hitting the relevant beans/methods and evaluating the outcome.
*) It may be possible to determine a bean in a deadlocked state by requesting a heap dump and looking for deadlocked periodically.