Re: [Springframework-developer] WLS 7 and TX suspend/resume - continue.

[Thomas R. <tho...@tr...>]

Juergen,

I'll try to implement and test a 
WebLogicServerTransactionManagerFactoryBean today.  I'll keep you posted.

For WLS 8.1 the TxHelper.getTransactionManager method is marked as 
deprecated even though it is not documented as such in the JavaDocs.  
There is also a brand new method getClientTransactionManager for 8.1 
that is starting out marked as deprecated.  Go figure.  We are probably 
better off recommending the JNDI lookups for 8.1.

Thomas



jürgen höller [werk3AT] wrote:

>Thanks, Thomas! This means that there *is* a way to make it work on WebLogic 7! Eugene, Dmitri, your pain finally has an end! :-)
> 
>Regarding obtaining the TransactionManager via the TxHelper on WebLogic 7: That can easily be factored out into a custom FactoryBean, like we did for WebSphere (see WebSphereTransactionManagerFactoryBean), to be passed into JtaTransactionManager's respectively WebLogicJtaTransactionManager's "transactionManager" property. So we don't need a further JtaTransactionManager subclass for this, just a further TransactionManager lookup strategy.
> 
>BTW, Dmitri told me that the WebLogic UserTransaction object at "java:comp/UserTransaction" implements the TransactionManager interface too, but that obviously forceResume doesn't work there... I assume the ClientTransactionManagerImpl is returned there, not the ServerTransactionManagerImpl.
> 
>If we can double-check that this works better than the TransactionManager fetched from JNDI, I suggest to add a WebLogicServerTransactionManagerFactoryBean (or a similar name), clearly documenting that this is meant as an alternative to the standard JNDI TransactionManager reference that WebLogic provides, mainly for WebLogic 7. I wouldn't mind to do this even for the 1.1 final release tomorrow...
> 
>Is the TxHelper lookup available on WebLogic 8.1 too? Of course, it shouldn't be necessary there, as the standard JNDI TransactionManager reference will work too. I just wonder whether it's available and would work in principle: People could then configure a WebLogicServerTransactionManagerFactoryBean to be able to deploy on both WebLogic 7 and WebLogic 8, without adapting their Spring configuration.
> 
>Of course, such a WebLogicServerTransactionManagerFactoryBean would have to be coded via reflection to avoid compile-time dependencies on WebLogic, analogous to WebSphereTransactionManagerFactoryBean. Do you have the chance to do this before tomorrow, Thomas?
> 
>Juergen
> 
>
>________________________________
>
>Von: spr...@li... im Auftrag von Thomas Risberg
>Gesendet: Sa 04.09.2004 14:30
>An: spr...@li...
>Betreff: Re: [Springframework-developer] WLS 7 and TX suspend/resume - continue.
>
>
>
>I have done some additional testing for this issue and this is what I
>have found.
>
>WebLogic exposes a client TransactionManager implementation via JNDI 
>(weblogic.transaction.internal.ClientTransactionManagerImpl) and in WLS
>7.0 it is throwing an NPE when you call forceResume (with or without a
>suspended transaction that has been marked for RollbackOnly).
>
>They also have a different server implementation
>(weblogic.transaction.internal.ServerTransactionManagerImpl) that is
>returnd by a call to TxHelper.getTransactionManager().  With this TM the
>force resume works as expected.
>
>So the workaround for now is to do the suspend/resume using the TM
>returned by TxHelper before calling the Spring managed code.
>Alternatively we could provide a WebLogic7JtaTransactionManager that
>uses this method of obtaining the TM.
>
>I doubt that BEA will fix this issue in WLS 7.0.  They will probably
>suggest to upgrade to 8.1 or use the TxHelper to obtain the TM.
>
>Thomas
>
>
>jürgen höller [werk3AT] wrote:
>
>  
>
>>Ideally, WebLogic should work properly with standard JTA TransactionManager resume in all cases, not needing the proprietary forceResume call. However, the least we can expect is that forceResume works properly: You could send a corresponding bug report to BEA, for WebLogic 7.0. However, they might tell you that they fixed the issue in WebLogic 8.1...
>>
>>Juergen
>>
>>
>>________________________________
>>
>>Von: spr...@li... im Auftrag von jürgen höller [werk3AT]
>>Gesendet: Fr 03.09.2004 23:31
>>An: spr...@li...
>>Betreff: Re: [Springframework-developer] WLS 7 and TX suspend/resume - continue.
>>
>>
>>
>>As I already wrote in my JIRA comments: Many thanks for your efforts, Dmitri!
>>
>>I assume that with JtaTransactionManager, you'll get an IllegalStateException ("cannot resume rollback-only transaction" or the like), and with WebLogicJtaTransactionManager, you'll get the NPE in WebLogic code?
>>
>>This really seems to be a bug in WebLogic 7.0... At least it should work properly as long as not suspending a transaction that has been marked as rollback-only.
>>
>>Juergen
>>
>>
>>________________________________
>>
>>Von: spr...@li... im Auftrag von Dmitri Maximovich
>>Gesendet: Fr 03.09.2004 23:07
>>An: spr...@li...
>>Betreff: [Springframework-developer] WLS 7 and TX suspend/resume - continue.
>>
>>
>>
>>I just tried WLS 7 with Spring 1.1rc2 and BMT transaction demaraction. It
>>doesn't work with standard JtaTransactionManager or with
>>WeblogicJtaTransactionManager, so something fundamentally broken in WLS7 (same
>>NPE as described in JIRA SPR-251).
>>Next I'll try to use WLS TransactionManager (exposed in JNDI) to suspend/resume
>>transaction without Spring to see it it's going to work.
>>
>>
>>
>>
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