WLI and JMS and clusters

Hi,
We are deploying an HA solution which includes two servers running WLPI and
two JMS servers. Each JMS server is associated (target) with one WLPI
server.
I want to cluster these servers. However, JMS clustering limitations means
that a given JMS destination can only be defined on one server within the
cluster. So I need to change the destinations used internally by WLPI in
order to define the cluster. Is that possible? How? Am I missing something?
Thanks,
Philippe
Philippe Fajeau [email protected]
System Architect Tel: (604) 484-6675
Centrata Fax: (604) 685-5252

Philippe,
See my response today in weblogic.interest.developers. Yes you can cluster, but
for high availability you will have to do write you workflows a particular way,
until the recovery-code in WLI becomes cluster-safe.
Richard
"Philippe Fajeau" <[email protected]> wrote:
Hi,
We are deploying an HA solution which includes two servers running WLPI
and
two JMS servers. Each JMS server is associated (target) with one WLPI
server.
I want to cluster these servers. However, JMS clustering limitations
means
that a given JMS destination can only be defined on one server within
the
cluster. So I need to change the destinations used internally by WLPI
in
order to define the cluster. Is that possible? How? Am I missing something?
Thanks,
Philippe
Philippe Fajeau [email protected]
System Architect Tel: (604) 484-6675
Centrata Fax: (604) 685-5252

Similar Messages

Can JMS topics and queues be clustered in a WLS 7.0 Cluster?

We are installing a weblogic 7.0 cluster with 1 admin server and 2 managed
          node servers. Two nodes have been clustered. We are at the point where we
          need to configure JMS. Has any one implemented JMS in WLS 7 clustered
          environment? What are the things to watch out when clustering JMS? Can JMS
          topics and queues be clustered?
          TIA for any helpful hints and comments.
          Regards


"Karim Ali" <[email protected]> wrote:
          >> Has any one implemented JMS in WLS 7 clustered
          >> environment?
          I'm currently working on a project with WLS 7 here at work, involving
          the implementation of BEA's JMS Cluster. So far, I really haven't had
          many hiccups.
          "Karim Ali" <[email protected]> wrote:
          >> What are the things to watch out when clustering JMS?
          At least in WLS 7, the biggest thing that stands out is the lack of
          automatic failover. Also, Message Paging -- make sure you configure
          paging high/low thresholds. Or, if you don't wish for it to occur but
          can't stop the server (very common these days with SLAs), set that
          byte/message high threshold to a very large number (correct me if I'm
          wrong, but I believe BEA recommends 2^63 -1).
          "Karim Ali" <[email protected]> wrote:
          >> Can JMS topics and queues be clustered?
          Well, since Topics and Queues are extensions of the
          javax.jms.Destination interface, the answer is: Yes!
          (SIDE NOTE: most people usually refer to them as a [JMS] "destination"
          -- it avoids a lot of conceptual baggage and plus, less typing!)
          You'll probably want to see this section of BEA's e-docs:
          http://edocs.bea.com/wls/docs70/adminguide/jms.html#config_distributed_destinations
          later,
          Brian J. Mitchell
          BEA Systems Administrator
          TRX
          Atlanta, GA
          email: [email protected]
          office: 404-327-7238
          mobile: 678-283-6530

Pros and Cons of using REST over JMS (and other technologies)

Hey all,
I am working on a project where we were using JMS initially to send messages between servers. Our front end servers have a RESTful API and use JEE6, with EJB 3.1 entity beans connected to a mysql database and so forth. The back end servers are more like "agents" so to speak.. we send some work for them to do, they do it. They are deployed in GlassFish 3.1 as well, but initially I was using JMS to listen to messages. I learned that JMS onMessage() is not threaded, so in order to facilitate handling of potentially hundreds of messages at once, I had to implement my own threading framework. Basically I used the Executor class. I could have used MDBs, but they are a lot more heavyweight than I needed, as the code within the onMessage was not using any of the container services.
We ran into other issues, such as deploying our app in a distributed architecture in the cloud like EC2 was painful at best. Currently the cloud services we found don't support multi-cast so the nice "discover" feature for clustering JMS and other applications wasn't going to work. For some odd reason there seems to be little info on building out a scalable JEE application in the cloud. Even the EC2 techs, and RackSpace and two others had nobody that understood how to do it.
So in light of this, plus the data we were sending via JMS was a number of different types that had to all be together in a group to be processed.. I started looking at using REST. Java/Jersey (JAX-RS) is so easy to implement and has thus far had wide industry adoption. The fact that our API is already using it on the front end meant I could re-use some of the representations on the back end servers, while a few had to be modified as our public API was not quite needed in full on the back end. Replacing JMS took about a day or so to put the "onmessage" handler into a REST form on the back end servers. Being able to submit an object (via JAXB) from the front servers to the back servers was much nicer to work with than building up a MapMessage object full of Map objects to contain the variety of data elements we needed to send as a group to our back end servers. Since it goes as XML, I am looking at using gzip as well, which should compress it by about 90% or so, making it use much less bandwidth and thus be faster. I don't know how JMS handles large messages. We were using HornetQ server and client.
So I am curious what anyone thinks.. especially anyone that is knowledgeable with JMS and may understand REST as well. What benefits do we lose out on via JMS. Mind you, we were using a single queue and not broadcasting messages.. we wanted to make sure that one and only one end server got the message and handled it.
Thanks..look forward to anyone's thoughts on this.

851827 wrote:
Thank you for the reply. One of the main reasons to switch to REST was JMS is strongly tied to Java. While I believe it can work with other message brokers that other platforms/languages can also use, we didn't want to spend more time researching all those paths. REST is very simple, works very well and is easy to implement in almost any language and platform. Our architecture is basically a front end rest API consumed by clients, and the back end servers are more like worker threads. We apply a set of rules, validations, and such on the front end, then send the work to be done to the back end. We could do it all in one server tier, but we also want to allow other 3rd parties to implement the "worker" server pieces in their own domains with their own language/platform of choice. Now, with this model, they simply provide a URL to send some REST calls to, and send some REST calls back to our servers.well, this sounds like this would be one of those requirements which might make jms not a good fit. as ejp mentioned, message brokers usually have bindings in multiple languages, so jms does not necessarily restrict you from using other languages/platforms as the worker nodes. using a REST based api certainly makes that more simple, though.
As for load balancing, I am not entirely sure how glassfish or JBoss does it. Last time I did anything with scaling, it involved load balancers in front of servers that were session/cookie aware for stateful needs, and could round robin or based on some load factor on each server send requests to appropriate servers in a cluster. If you're saying that JBoss and/or GlassFish no longer need that.. then how is it done? I read up on HornetQ where a request sent to one ip/hornetq server could "discover" other servers in a cluster and balance the load by sending requests to other hornetq servers. I assume this is how the JEE containers are now doing it? The problem with that to me is.. you have one server that is loaded with all incoming traffic and then has to resend it on to other servers in the cluster. With enough load, it seems that the glassfish or jboss server become a load balancer and not doing what they were designed to do.. be a JEE container. I don't recall now if load balancing is in the spec or not..I would think it would not be required to be part of a container though, including session replication and such? Is that part of the spec now?you are confusing many different types of scaling. different layers of the jee stack scale in different ways. you usually scale/load balance at the web layer by putting a load balancer in front of your servers. at the ejb layer, however, you don't necessarily need that. in jboss, the client-side stub for invoking remote ejbs in a cluster will actually include the addresses for all the boxes and do some sort of work distribution itself. so, no given ejb server would be receiving all the incoming load. for jms, again, there are various points of work to consider. you have the message broker itself which is scaled/load balanced in whatever fashion it supports (don't know many details on actual message broker impls). but, for the mdbs themselves, each jee server is pretty independent. each jee server in the cluster will start a pool of mdbs and setup a connection to the relevant queue. then, the incoming messages will be distributed to the various servers and mdbs accordingly. again, no single box will be more loaded than any other.
load balancing/clustering is not part of the jee "spec", but it is one of the many features that a decent jee server will handle for you. the point of jee was to specify patterns for doing work which, if followed, allow the app server to do all the "hard" parts. some of those features are required (transactions, authentication, etc), and some of those features are not (clustering, load-balancing, other robustness features).
I still would think dedicated load balancers, whether physical hardware or virtual software running in a cloud/VM setup would be a better solution for handling load to different tiers?like i said, that depends on the tier. makes sense in some situations, not others. (for one thing, load-balancers tend to be http based, so they don't work so well for non-http protocols.)

What is the association between JMS Server and JMS Module in weblogic 10?

Hi,
I have a created a ConnectionFactory, Queue, Topic under JMS Modules in Weblogic Server 10 using admin console.
And I have created a JMS Server and Targetted to the current running server (Admin Server).
But when I run the Queue Sender program it is unable to LookUP the jndi which I gave for Queue.
queue = (Queue) initialContext.lookup("jndi_queue");
Exception:
javax.naming.NameNotFoundException: Unable to resolve 'jndi_queue'.
But I configured this jndi name when I create the Queue in JMS Module in Weblogic Server 10.
How JMS Module and JMS server are associated.
My Doubt is if i have several JMS Modules and only one JMS Server created then how does the JMS Server identifies which Queue/Topic belongs to which JMS Module????
Please advice.
Thanks....

Hi,
Once you have JMS servers configured:
Step 1: Target the JMS configuration module to the cluster that will host the destination, or, if not using clustering, target the module to the individual WL server that will host the JMS server.
Step 2: Configure a "subdeployment" for the module and set it to reference the exact JMS server(s) that will host the destination. If you're using a distributed desitnation, you can specify multiple JMS servers, if you're using a regular destination, only specify a single destination.
Step 3: Create a destination resource in the module, and set its subdeployment to the subdeployment you specified in step 1 (the console calls this "advanced targeting"). As a best practice avoid the "default targeting" option for the resource - always choose subdeployment (advanced) targeting.
For more information, reference the "best practices" chapter of the JMS configuration guide:
http://download.oracle.com/docs/cd/E14571_01/web.1111/e13738/best_practice.htm#CACJCGHG
I also I highly recommend the JMS chapter of the book "Professional Oracle WebLogic".
Hope this helps,
Tom

MapMessage and JMS Event Generator

Hello
I need to set up a WLI JMS event generator that will consume a JMS MapMessage. It appears that the only message types supported by a JMS event generator are xml, rawData, string and none.
I've already tried each of these and for each I get a message saying "Cannot publish non-TextMessage to channel of type String" or "Cannot publish non-ByteMessage to channel of type ...".
I have sent MapMessage types using WLI's JMS controls. Is there a way to consume a MapMessage type via an event generator?
Thanks
Tom

Bishu thanks, Channel type is defined as String, Message on JMS queue are of type String. Also can you elaborate on "JMS event generator check the type of message you want to process." that you mentioned. I have not found this option while configuring JMS EG. (We are using ver. 8.1 sp 5)
This was working fine in local env. But when we configured message bridge between MQ queue and JMS queue, we startted getting error messages. I am trying to find out how does MQ stores messages. Doing integrations with MQ has been real headache for us.

Any kind of integration experience with Weblogic JMS and Oracle AQ?

Hi,
In my company I work with java developers who believe in some kind of "holly" database independence I don't understand and as a result my life as a database developer is hell on earth.. Yesterday we again started to discuss, this time where to log, they believe database is slow and prefer logging to filesystem, after some hours finally I could convince them for some operational and reporting needs to use the database and will do this in an asyncronous way whiich they won't get slow. After all I believe the reason for a database is data, this is the place where data lives, and with the correct desing and implementation logging to database would perform better.
I love Oracle features, and know that we paid a lot for this software, so today I started investigating this promised solution. And quickly I found AQ and JMS topics in the documentation :)
After this introduction here is my problem; my company use BEA Weblogic as application server and the java guys want AQ to automatically (but of course with some delay) take their JMS log requests into database tables. Does any one have similar application experience, or any kind of integration experience with Weblogic JMS and Oracle AQ?
Any comments, references, documentation, sample code, url will be most welcomed :)
Thank you very much!
Tonguc
[email protected]
References I found upto now;
Oracle® Streams Advanced Queuing Java API Reference 10g Release 2 (10.2) http://download-uk.oracle.com/docs/cd/B19306_01/server.102/b14291/toc.htm
(Packages; javax.jms & oracle.jms)
Oracle® Streams Advanced Queuing User's Guide and Reference 10g Release 2 (10.2) http://download-uk.oracle.com/docs/cd/B19306_01/server.102/b14257/toc.htm
Part IV
Using Oracle JMS and Oracle Streams AQPart V describes how to use Oracle JMS and Oracle Streams Advanced Queuing (AQ).
Chapter 11, "Introducing Oracle JMS"
Chapter 12, "Oracle JMS Basic Operations"
Chapter 13, "Oracle JMS Point-to-Point"
Chapter 14, "Oracle JMS Publish/Subscribe"
Chapter 15, "Oracle JMS Shared Interfaces"
Chapter 16, "Oracle JMS Types Examples"
A Sample Code from Otn
http://www.oracle.com/technology/sample_code/tech/java/web_services/jmsws/NewsQueueEJB.java.html

I wouldn't go as far to say Oracle AQ is out-dated today. However, it is indeed a proprietary technology that did not found much main-stream adoption in the earlier years after its introduction. The advent of JMS made it somewhat more useful (or should I say intriguing, because more people are trying to tie it together with other J2EE technologies), but the Oracle's JMS wrapper classes in aqapi.jar were not feature complete for a long while, so using it outside Oracle's application server was painful, if not impossible. I do agree that the info at the dev2dev's JMS newsgroup or in this forum is highly fragmented, as neither Oracle nor BEA provides an official solution to integrate AQ with WebLogic, so people like us have to learn the technology through experimentation and in a piecemeal fashion.
3 years ago I was literally "playing around" - we had a polling mechanism set up to use triggers to write Oracle data changes into an event table, and had a Java-based daemon to scan that table and publish events as JMS messages to the WebLogic JMS server. This continues to work reliably till today, but I was looking for a solution that has few parts - I wanted to hook up my WebLogic MDB directly to AQ as a foreign JMS provider. Although I was able to get it to work (including XA), there were a few hoops I had to jump through, such as decompiling the Oracle AQjms classes to make them bind to the WebLogic JNDI tree.
One year after that Diptanshu Parui took what I did a giant step further - he extended the Oracle AQjms classes to allow them to be bound to the WebLogic JNDI tree naturally, and he figured out how to use WebLogic JMS messging bridge to re-send single-threaded AQ JMS messages to clustered JMS queues, which allow concurrent message assumption by multiple instances of MDB's. My impression is that he is using that setup in a production environment.
I am sure you are aware of it but I would like to make it clear - in order to use AQ as a foreign JMS provider to WebLogic-hosted MDB's, you don't need to update your database to Oracle 10g - Oracle 8i is good enough (although I recommend at least 9i Release 2). It is not the database engine, but rather the aqapi.jar JMS wrapper on top of AQ that matters. I do recommend that you use aqapi.jar from Oracle Application Server 10.0.3 or up for better XA support, among other things. Again, you don't have to replace WebLogic with Oracle AS - you only need a single jar file from it and put it in your WebLogic's classpath. However, I don't know what this means from a licensing point of view if you ever go to production - do you have to pay the full price of OracleAS or OC4J just to use the aqapi.jar?
In the coming days I will test the latest aqapi.jar to see how much progress Oracle has made in terms of making their J2EE products more spec-compliant :-).
Hope the above gives you a different perspective.
Eric

Using socket and JMS protocol in the same logic for OSB

Hi frnds,
In my organization...the only communication protocol used is "socket" protocol. However, I want to use JMS protocol to process incoming messages. Can somebody help me figuring out how to go about it.
Using some nice OSB blogs, I am able to create the JMS connection factory and JMS queues in weblogic. And that works fine when I select the communication protocol as JMS while creating the BS and PS.
What should be my message flow when the communication protocol used is "socket" for both BS and PS.
salil

Hi,
Make the BS as JMS and the PS as socket, in the PS's flow do a route for the BS... Then if an external call is made to the PS via socket, it will send a messages to a JMS queue...
Hope this helps...
Cheers,
Vlad

Difference Between JMS and RMI

Difference Between JMS and RMI in J2EE Technologies

STFW
JMS - http://www.google.co.za/search?hl=en&q=what+is+jms&meta=
RMI - http://www.google.co.za/search?hl=en&q=what+is+rmi&meta=

Problem with EJB and JMS - Failed to obtain/create connection

hello ejb and jms programmers,
My problem is my topic MDB keep on retrieving the same message when there is a database connection failure. Maybe somebody could help me how to prevent to retrieve the same data?
Given:
- I purposedly turn off the pointbase database because im testing my error handling.
- Im using SJSAS 8 as my application server.
- My message Driven Bean of topic type.
- Im using CMP for my entity bean
Here is the scenario of whats happening - step by step:
1. A separate application publishes a message to JMS queue server
2. My MDB retrieves this message and do some processing then inserts a record (transaction history) in my database
3. But my db is turned off or down
4. My MDB sends a successful processing reply to the JMS queue server
5. Then i noticed that my server.log keeps on growing so when i opened it, the record was not inserted and printed the stacktrace below "RAR5117 : Failed to obtain/create connection. Reason : javax.transaction.SystemException" (complete stacktrace below)
6. I understand the cause of the stacktrace is because the DB is turned off. But what i dont understand is that my MDB keeps on reading the same message. Since my MDB is of topic type, isnt a topic MDB supposedly reads a message only once???
So my questions are:
1. how do i handle insert database error?
2. how can i stop my MDB from processing the same message?
3. any better suggestions?
Thank you in advance :)
leigh
*** more complete stack trace ***
[#|2005-01-09T15:35:57.097+0800|WARNING|sun-appserver-pe8.0.0_01|javax.enterprise.system.core.transaction|_ThreadID=17;|JTS5041: The resource manager is doing work outside a global transaction
javax.transaction.xa.XAException
     at com.pointbase.xa.xaException.getXAException(Unknown Source)
     at com.pointbase.xa.xaConnectionResource.start(Unknown Source)
     at com.sun.gjc.spi.XAResourceImpl.start(XAResourceImpl.java:162)
[#|2005-01-09T15:35:57.167+0800|SEVERE|sun-appserver-pe8.0.0_01|javax.enterprise.resource.resourceadapter|_ThreadID=17;|RAR5027:Unexpected exception in resource pooling
javax.transaction.SystemException
     at com.sun.jts.jta.TransactionImpl.enlistResource(TransactionImpl.java:185)
     at com.sun.enterprise.distributedtx.J2EETransaction.enlistResource(J2EETransaction.java:360)
     at com.sun.enterprise.distributedtx.J2EETransactionManagerImpl.enlistResource(J2EETransactionManagerImpl.java:303)
     at com.sun.enterprise.distributedtx.J2EETransactionManagerOpt.enlistResource(J2EETransactionManagerOpt.java:115)
[#|2005-01-09T15:35:57.177+0800|WARNING|sun-appserver-pe8.0.0_01|javax.enterprise.resource.resourceadapter|_ThreadID=17;|RAR5117 : Failed to obtain/create connection. Reason : javax.transaction.SystemException|#]
[#|2005-01-09T15:35:57.227+0800|WARNING|sun-appserver-pe8.0.0_01|javax.enterprise.resource.resourceadapter|_ThreadID=17;|RAR5114 : Error allocating connection : [Error in allocating a connection. Cause: javax.transaction.SystemException]|#]
[#|2005-01-09T15:35:57.237+0800|SEVERE|sun-appserver-pe8.0.0_01|javax.enterprise.system.container.ejb|_ThreadID=17;|EJB5071: Some remote or transactional roll back exception occurred
com.sun.jdo.api.persistence.support.JDODataStoreException: JDO77006: SQL exception: state = null, error code = 0.
NestedException: java.sql.SQLException: Error in allocating a connection. Cause: javax.transaction.SystemException
FailedObjectArray: [[email protected]5ac]
     at com.sun.jdo.spi.persistence.support.sqlstore.impl.TransactionImpl.getConnectionInternal(TransactionImpl.java:1444)
     at com.sun.jdo.spi.persistence.support.sqlstore.impl.TransactionImpl.getConnection(TransactionImpl.java:1339)

Hi annie,
Wherever you are handling database transactions,
you'd not be able to create a Connection if database
is closed (I think you mentioned turning off the
database) then at this condition, you should
certainly throw a System level exception and stop all
processing with some meaningful flow to indicate a
failure (like display message on UI). Even
network problems are handled by exceptions... so I
don't see a reason why you didn't wrap it in the
first place.
Anyway, try handling specific exceptions rather than
the general Exception... this will give you a better
idea of what to do in case of an exception.Yes i know this. I am practicing this in my non-j2ee server applications. But the j2ee app im making, i just pass the db url in the descriptor and the app server automatically creates the connection for my app. So where would i put exception handling?
2. how can i stop my MDB from processing the same
message?Guaranteed delivery is not supposed to stop
processing. It will continue to process the message
after certain intervals till the message is
delivered. You shouldn't deliver it at all, if you
are able to detect that the database is off
The problem here is that my MDB automatically retrieves the message from the JMS queue server. Im not the one retrieving the messages manually.
My assumed behavior of topic MDB is once the a certain MDB retrieves a message it will not retrieve the same message anymore.
thank you in advance.
leigh

Compare creation of Datasources and JMS Queues : SAP vs (Weblogic/Websphere

I am used to creating JDBC Datasources and JMS Queues on Weblogic/Websphere thru their Admin applications.
Can someone compare/contrast that process to that on SAP's netweaver ( either using NWA or Visual Administrator).
Thanks

Hi Parag,
For the process of creating JDBC datasources and JMS resources @ SAP NetWeaver you can refer to the documents here on SDN and help.sap.com, and compare that process for yourself, thus not being influenced by others' biased or unbiased opinions.
For NetWeaver 04 and 04s these would be:
<a href="http://help.sap.com/saphelp_nw04/helpdata/en/b0/6e62f30cbe9e44977c78dbdc7a6b27/frameset.htm">JDBC Connector Service</a>
<a href="http://help.sap.com/saphelp_nw04/helpdata/en/22/cf4e71c46cdb4da31153be96c5389f/frameset.htm">JMS Connector Service</a>
For the <a href="https://www.sdn.sap.comhttp://www.sdn.sap.comhttp://www.sdn.sap.com/irj/sdn/javaee5">Java EE 5 Edition</a>:
<a href="https://www.sdn.sap.comhttp://www.sdn.sap.comhttp://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/7bb9751d-0e01-0010-febd-c3adce2c408c">Working with Database Tables, DataSources and JMS Resources</a>
<a href="https://www.sdn.sap.comhttp://www.sdn.sap.comhttp://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/806e75a0-0e01-0010-2587-fc518de8ac1a">Administration Guide</a> -> section "Application Resources Management" (pages 89-104)
Hope that helps!
Your feedback/findings are very welcome!
-Vladimir

What is the Difference between AQ adpater and JMS adapter??

What is the Difference between AQ adpater and JMS adapter in BPEL11g??
In what scenarios we go for AQ and for what scenarios we go for JMS adapter???

Go for AQ when using Oracle Advanced Queueing (the database stuff).
Use JMS when using JMS (in memory of file queues)
hth,
Peter Paul

EJB and JMS (newbie)

          I'm looking to deploy what is essentially a message-broking service. A bean that
          will invoke a helper class which will dequeue messages.
          Basically I want to set up our consumer to invoke a handler, which will invoke
          a bean that provides message-broking services as described above.
          The handler that invokes the bean is to be called from the WLSConsumer. The problem
          is that I'm now getting a java.io.NotSerializableException on the WLS consumer.
          This is probably a really obvious question, but how can I get around this?
          My structure is:
          Consumer >> Handler >> Bean >> Helper
          The consumer is to call the handler, which uses the bean's helper class to pull
          a message off the queue, and do some intermediate processing on it.
          We're using an older version of J2EE, on Weblogic 5.1.
          Which classes do I need to implement Serializable?
          Thanks in anticipation.


Hi Seoh!
Both stateles and JMS can participate in a single transaction, but because two
resource managers are being used they must use the 2PC protocol, In oreder to
use the 2PC u need to get the license from the bea and after that u need to enable
the 2PC in WLS through admin conbsole. But remember that transactions in stateless
beans cant span across multiple method incocations
Thanx,
Aravind

Content Conversion - JDBC and JMS

Can we use File Content Conversion with JDBC and JMS ?

Hi,
How To Use the Content Conversion Module in JMS Adapter - https://websmp106.sap-ag.de/~form/sapnet?_SHORTKEY=01100035870000582377&
check this for JMS content conversion:
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/f02d12a7-0201-0010-5780-8bfc7d12f891
Check the how to guide provided by prabhu and also this link on the XMl To TeXtCoversion Module,
http://help.sap.com/saphelp_nw04/helpdata/en/44/748d595dab6fb5e10000000a155369/content.htm
Ref How To Use the Content Conversion Module in JMS Adapter -
https://websmp106.sap-ag.de/~form/sapnet?_SHORTKEY=01100035870000582377&
See this weblogs which was shown with examples:
How to use SAP's WebAS J2EE's JMS Queue in Exchange Infrastructure
Sync/Async communication in JMS adapter without BPM (SP19)
Async/Sync Communication using JMS adapter without BPM (SP 19)
Exploring JMS and SAP-XI JMS Adaper
Configuring the sender JMS adapter
http://help.sap.com/saphelp_nw2004s/helpdata/en/f4/2d6189f0e27a4894ad517961762db7/content.htm
Configuring the receiver JMS adapter
http://help.sap.com/saphelp_nw2004s/helpdata/en/10/b1b4c8575a6e47954ad63438d303e4/content.htm
Check JMS Adapter section of this blog by Sravya:
Aspirant to learn SAP XI...You won the Jackpot if you read this!-Part III
Also information related to Provider-specific settings are available
http://help.sap.com/saphelp_nw2004s/helpdata/en/cd/d85a9d6fab7d4dbb7ae421f710626c/frameset.htm
Plz do refer the following threads:
JMS Content Conversion - no CR/LF
Message (Data) getting lost after JMS Content Conversion(Sender)
Message (Data) getting lost after JMS Content Conversion(Sender)
Message (Data) getting lost after JMS Content Conversion(Sender)
Regards,
Vinod.

Data Guard Broker and Cold Failover clusters

Hi,
I wanted to use Data Guard Broker to control primary/standby systems on AIX clusters but found that without Oracle clusterware it is not supported on failover of a database to another node (unless you drop and recreate the configuration which in my opinion is not support at all!).
The 11g documentation states that DG Broker offers support for single instance databases configured for HA using Oracle Clusterware and "cold failover clusters".
Does anyone know whether this support for cold failover clusters in 11g means "proper support" i.e the configuration detects that the hostname has changed and automatically renames it so it continues to work?, or is the support in 11g the same as that in 10g?.
Thanks,
Andy

Hi Jan,
We already use virtual hostnames.
When I set up the configuration the hostname for the databases default to the server name. The only way I know of changing this is to disable the configuration, then use the "edit database...set property" command but when I enable the configuration again it reverts back to its previous value.
regards,
Andy

JMS and Java EE 5 Tutorial

Hello,
I'm new to JMS and have been following Suns JMS tutorial here....
[http://java.sun.com/javaee/5/docs/tutorial/doc/bncfa.html#bncfc|http://java.sun.com/javaee/5/docs/tutorial/doc/bncfa.html#bncfc]
I followed the example for the Producer / SynchConsumer programs.
I also created my resources using Sun Java Application Server.
The code example uses annotations only (@Resource) and does not use JNDI lookup.
My problem is that the annotations only solution, as described in the tutorial,
    @Resource(mappedName = "jms/ConnectionFactory")
    private static ConnectionFactory connectionFactory;
    @Resource(mappedName = "jms/Queue")
    private static Queue queue;
    @Resource(mappedName = "jms/Topic")
    private static Topic topic;give me a NullPointerException error when this code is run...
connection = connectionFactory.createConnection();I've added JNDI lookup ....
        System.setProperty("java.naming.factory.initial", "com.sun.appserv.naming.S1ASCtxFactory");
     System.setProperty("java.naming.provider.url", "iiop://111.222.333.109:3700");
     InitialContext ic = new InitialContext();
     connectionFactory = (ConnectionFactory)ic.lookup("jms/ConnectionFactory");
     queue = (Queue)ic.lookup("jms/Queue");
     topic = (Topic)ic.lookup("jms/Topic");and it seems to work now....
Anyone come accross this before?
What am I missing from the annotations only solution?
Thanks,
Jon

Hi,
Previously I was trying to run this using Eclipse.
I tried this using NetBeans IDE and the annotations worked fine.
Problem solved.
/Jon

WLI and JMS and clusters

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