August 2008 - jboss-user - Jboss List Archives

[EJB 3.0] - DDL statement inside a transaction (mysql)

by vanyatka

Hi, There is a transactional SLSB method that uses EntityManager. It does some business logic, and on its finish all DB changes should be made persistent or rolled back. The problem is that along the way some DDL statements must also be executed. And MySQL cannot execute those statements inside the same SQL transaction, forcing to commit all outstanding changes. http://dev.mysql.com/doc/refman/5.0/en/implicit-commit.html I tried to workaround the problem, issuing DLL statements inside a new transaction, like this: @TransactionAttribute(TransactionAttributeType.REQUIRES_NEW) | public int ddl(String ddl) { | log.warn("DDL is #0", ddl); | return entityManager.createNativeQuery(ddl).executeUpdate(); | } | But in spite of REQUIRES_NEW attribute all previous changes of *parent* transaction are also made persistent. Can you suggest what might be the problem? Thanks, View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171107#4171107 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4171107

17 years, 10 months

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[JBoss Portal] - Re: JBPORTAL-1978 : scriptaculous & prototype js

by chuaky

oic, i try to see if by loading the new scriptaculous and prototype js from portal headers can be a workaround. If i can find wat cause the problem, i would post it :) Thanks Thomas. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171106#4171106 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4171106

17 years, 10 months

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[JBoss jBPM] - Re: Terminated or deleted process instance?

by lblaauw

Hmm Thats weird, we also use 3.2.3 here on a jboss server 4.2GA release and a mysql database 5.x No idea why the cascades dont work then on our installations Regards, Leo "mputz" wrote : anonymous wrote : The case i have is that Comment objects are attached to tokens in the process instance. | | I just tested GraphSession.deleteProcessInstance on a process with related comments, and they were deleted just fine. This was with jBPM 3.2.3. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171105#4171105 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4171105

17 years, 10 months

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[EJB 3.0] - Re: SLSB basic design question

by vanyatka

"ALRubinger" wrote : SLSBs *do* have state, as the instance is returned to the Pool after use. Therefore invocation-specific data should not be kept in instance members of a SLSB. Thanks, Andrew. This makes good sense. However, if I only run one single facade method, and previous old state doesn't bug me (all variables are re-initialized before used), can such "temporal" use of fields be justified? Imagine I have a chain of methods inside a SLSB. a calls b, b calls c, c calls d, etc. Facade method receives a parameter. I need to use that parameter down the chain of execution. Should I put that parameter in each method declaration? Ouch ... Doesn't look very appealing, don't you think? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171104#4171104 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4171104

17 years, 10 months

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[JBoss Cache: Core Edition] - Re: Has anyone used JBC 2.x series with JBossAS 4.2.x series

by jason.greene＠jboss.com

On this topic, we are planning on a AS5 clustering SPI that will allow for JBC to be easily updated (globally). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171103#4171103 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4171103

17 years, 10 months

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[JBoss jBPM] - Re: Stale state problem kills process instance?

by estaub

You probably have a race condition between the beginning of the async node finishing up, and the end of the async firing. I wasn't clear on what's causing the wait node to complete - can it be very quick? If so, try putting a delay in there and see if it goes away. This isn't a fix, obviously - it just will point a finger at the problem. -Ed View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171102#4171102 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4171102

17 years, 10 months

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[JBoss Portal] - Re: custom user and Jboss user

by amouradi

Hi Peter, Thanks for your response! Do you think storing portal username and mapping to our databse customerId is reasonable approach then? I think I would either need to implement AuthenticationEventListener so mapping between my customer and portal user gets created if it has not existed before, or have a custom portlet that does that. What do you think? Thanks! Ann View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171101#4171101 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4171101

17 years, 10 months

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[EJB 3.0] - Re: SLSB basic design question

by ALRubinger

Peter is right, though for the wrong reason. :) SLSBs *do* have state, as the instance is returned to the Pool after use. Therefore invocation-specific data should not be kept in instance members of a SLSB. For SFSB this is acceptable (and good practice) because it's guaranteed that every subsequent invocation upon a given proxy will invoke upon the same SFSB instance. However, EJBs are Thread-safe - no two invocations will use the same instance concurrently (by spec anyway): "EJB 3.0 Core Specification 4.7.11" wrote : The container must ensure that only one thread can be executing an instance at any time. S, ALR View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171100#4171100 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4171100

17 years, 10 months

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[EJB 3.0] - Re: SLSB basic design question

by vanyatka

"PeterJ" wrote : With an SLSB multiple threads can be using it simultaneously Huh??? What about SLSB pools then? I was sure that a thread takes SLSB instance from the POOL, executes it and returns it back for later use. Never two threads execute on the same SLSB instance. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171099#4171099 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4171099

17 years, 10 months

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[Advanced Documentation] - Re: Increase code cache non heap memory

by manibhat

Thanks peter, I had completed missed that option while going through the VM options. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171098#4171098 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4171098

17 years, 10 months

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jboss-user August 2008