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Migration to 3.0 & mixing with 2.1

 
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hi all,

I would like to migrate step by step my 2.1 beans to 3.0 version. I have a plan to first migrate my session beans and deploy it to production. Is it possible/safe to mix 2.1 and 3.0? What possible issues could I encounter? I use JBoss 4.2.3 GA.

Michal
 
Michal Glowacki
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I've found information that container can take 2.1 and 3.0 in the same time unless they are not part of the same deployment archive.

Can anybody confirm this? No issues anyway?
 
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Mr. Glowacki,

Sorry for the late reply to this...I just came back from vacation.

Porting from EJB 2.1 to EJB 3.0 is quite smooth because EJB 3.0 containers are 100% backwards compatible. For further coverage, please check out the migration chapter in EJB 3 in Action. We talk about these issues in fairly good detail.

Hope it helps,
Reza
 
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