August 2010 - jboss-user - Jboss List Archives

Re: [jboss-user] [Beginner's Corner] - JDBC inside CMT

by Mads Moelgaard Andersen

Mads Moelgaard Andersen [http://community.jboss.org/people/mda_dk] replied to the discussion "JDBC inside CMT" To view the discussion, visit: http://community.jboss.org/message/557879#557879 -------------------------------------------------------------- Hi Wolf-Dieter Thanks for your reply. The actual setup is somewhat more complex than my example. I reality my MDB need to use JDBC for queries on a number of tables that are not entities and where it makes no sense to define entity objects for these tables. The JDBC connection I get from a DS. My MDB also operates on entity objects, naturally through the entityManager. Everywhere I read about transactions I run into roughly the same text, following taken from: http://java.sun.com/j2ee/tutorial/1_3-fcs/doc/Transaction3.html http://java.sun.com/j2ee/tutorial/1_3-fcs/doc/Transaction3.html > You should not invoke any method that might interfere with the transaction boundaries set by the container. The list of prohibited methods follows: > * > . The commit, *setAutoCommit*, and rollback methods of java.sql.Connection > > > * > . The getUserTransaction method of javax.ejb.EJBContext > > > * > . Any method of javax.transaction.UserTransaction > > > Since I basically work with a MDB with CMT I wonder about the consequences of mixing JDBC with CMT. It is not an option to have the MDB's transaction control the completion of the JDBC queries as their completion is a precondition for making the queries on the entity objects. I've taken the consequence of not finding any satisfying answers as to why it cannot be mixed and put all of my JDBC in a BMT SLSB with AutoCommit = true and where I open and (naturally) close connection, statements and ResultSets. Again.....nowhere I've been able to find a decent explanation as to why? Thanks again. Best regards Mads M Andersen -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/557879#557879] Start a new discussion in Beginner's Corner at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

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Re: [jboss-user] [Performance Tuning] - Memory leak in StatelessBeanContext

by jaikiran pai

jaikiran pai [http://community.jboss.org/people/jaikiran] replied to the discussion "Memory leak in StatelessBeanContext" To view the discussion, visit: http://community.jboss.org/message/557876#557876 -------------------------------------------------------------- > Wessel van Norel wrote: > > B.T.W. the maxsize value doesn't seem to matter. Once I install this pool most StateLessBeans have only 1 instance. Which is, I.M.H.O., clearly an indicator that this is a bug. You mean maxsize for StrictMaxPool? Can you provide your bean code configurations. Also see if this helps http://docs.jboss.org/ejb3/docs/reference/1.0.7/html/SessionBean_and_MDB_... http://docs.jboss.org/ejb3/docs/reference/1.0.7/html/SessionBean_and_MDB_... -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/557876#557876] Start a new discussion in Performance Tuning at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

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Re: [jboss-user] [JBoss Cache] - JBoss Cache as a standalone service

by Wasanka Wickramasinghe

Wasanka Wickramasinghe [http://community.jboss.org/people/wasanka2000] replied to the discussion "JBoss Cache as a standalone service" To view the discussion, visit: http://community.jboss.org/message/557875#557875 -------------------------------------------------------------- Hi Navin, Thanks for the quick reply and your comments about infinispan. Yes I have not heard of Infinispan. I have to use JBoss Cache since the project I'm working started about 2 years back and at that time it was decided to use JBoss Cache. That's the only reason why I need to seek solutions for JBoss Cache. The code that I need to write is an extension to it. I will definitely read on infinispan :). -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/557875#557875] Start a new discussion in JBoss Cache at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

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Re: [jboss-user] [JBoss Cache] - JBoss Cache as a standalone service

by Navin Surtani

Navin Surtani [http://community.jboss.org/people/navssurtani] replied to the discussion "JBoss Cache as a standalone service" To view the discussion, visit: http://community.jboss.org/message/557867#557867 -------------------------------------------------------------- Udaya, First step - since this seems like a new application that you're writing I'd suggest that you don't use JBoss Cache :) . JBC hasn't had any development going on it for at least a year or so now. All the new development is on http://www.jboss.org/infinispan/ Infinispan now. There is tonnes of documentation out there for you to go and read up on how to write up the application that you require using Infinispan. Just out of interest, what's the reason that you decided to use JBoss Cache as opposed to Infinispan in the first place? Was it that you just haven't heard of it? -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/557867#557867] Start a new discussion in JBoss Cache at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

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Re: [jboss-user] [Performance Tuning] - Memory leak in StatelessBeanContext

by Wessel van Norel

Wessel van Norel [http://community.jboss.org/people/delgurth] replied to the discussion "Memory leak in StatelessBeanContext" To view the discussion, visit: http://community.jboss.org/message/557865#557865 -------------------------------------------------------------- B.T.W. the maxsize value doesn't seem to matter. Once I install this pool most StateLessBeans have only 1 instance. Which is, I.M.H.O., clearly an indicator that this is a bug. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/557865#557865] Start a new discussion in Performance Tuning at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

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[JBoss Cache] - JBoss Cache as a standalone service

by Wasanka Wickramasinghe

Wasanka Wickramasinghe [http://community.jboss.org/people/wasanka2000] created the discussion "JBoss Cache as a standalone service" To view the discussion, visit: http://community.jboss.org/message/557861#557861 -------------------------------------------------------------- Hi, I have a requirement to create and run a jboss cache instance as a standalone application. I have done this by creating a simple class with a main method to create and run the cache. Works fine and I can put/get data. Now I need to write another java application to put data into this cache by communicating with the first program. These two programs are running in two JVMs. What are the methods available for me to use? JMX? RMI? Could someone please help with an example java code to get an instance of the cache from the first program? Thanks, Udaya -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/557861#557861] Start a new discussion in JBoss Cache at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

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Re: [jboss-user] [Beginner's Corner] - Standards supported by JBoss AS vs JBoss EAP

by Wolf-Dieter Fink

Wolf-Dieter Fink [http://community.jboss.org/people/wdfink] replied to the discussion "Standards supported by JBoss AS vs JBoss EAP" To view the discussion, visit: http://community.jboss.org/message/557847#557847 -------------------------------------------------------------- AFAIK JBossAS and JBossEAP support the same specifications. But JBossEAP will be more stable. It is the platform for the JBoss support and significant JIRA bugs will be fixed with cumulative patches. The EAP will follow more strict the JavaEE specifiaction. Also the JBossEAP versions might be longer maintained as JBossAS versions. JBossAS distribution might include new (instable) features or beta versions of upcomming changes. If a patch is needed for this version you have to patch the source version according to the JIRA and compile your special JBoss version. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/557847#557847] Start a new discussion in Beginner's Corner at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

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Re: [jboss-user] [EJB 3.0] - Security principal propagation accross ejb3 modules

by Kobi Ianko

Kobi Ianko [http://community.jboss.org/people/kobiianko] replied to the discussion "Security principal propagation accross ejb3 modules" To view the discussion, visit: http://community.jboss.org/message/557837#557837 -------------------------------------------------------------- Hi Davide, how did you updated ro jms 2.0, could you help me with the steps needed to perform the upgrade? 10x, Kobi -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/557837#557837] Start a new discussion in EJB 3.0 at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

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Re: [jboss-user] [Beginner's Corner] - JDBC inside CMT

by Wolf-Dieter Fink

Wolf-Dieter Fink [http://community.jboss.org/people/wdfink] replied to the discussion "JDBC inside CMT" To view the discussion, visit: http://community.jboss.org/message/557826#557826 -------------------------------------------------------------- How do you connect? Do you use a connection out of JBoss connection pool? If you use plain JDBC, JDBC-connection-parameter and connection handling within the MDB, the DB access will be commited directly after the SQL-statement. This is without respect whether the MDB call is successful or not (and might not what you want). If you have to use plain JDBC, use a DataSource and set the MDB CMT to REQUIRED. In this case the action is only commited if the MDB return without an exception. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/557826#557826] Start a new discussion in Beginner's Corner at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

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Re: [jboss-user] [jBPM Development] - History details

by Maciej Swiderski

Maciej Swiderski [http://community.jboss.org/people/swiderski.maciej] replied to the discussion "History details" To view the discussion, visit: http://community.jboss.org/message/557819#557819 -------------------------------------------------------------- Hi HuiSheng, if it comes to previous activity you can find them using already available HistoryActivityInstanceQuery. The only disadvantage is that you will get both already finished and active activities. What we could do here is to introduce new parameter to narrow down the search to finished activities only, so result will have all activities that the process has already completed. What do you think about it? -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/557819#557819] Start a new discussion in jBPM Development at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&cont...]

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jboss-user August 2010