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why we define Session as ThreadLocal in hibernate

 
Greenhorn
Posts: 11
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Hello

I am learning Hibernate I just want to know why we define session object as ThreadLocal what is the advantage? what is the disadvantage if we don't make it as ThreadLocal

and one more SessionFactory is only one instance per application/VM ? is there any way ther is more than one SesionFcatory


thanks for your help
 
author and cow tipper
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Hibernate Spring Tomcat Server
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ThreadLocal is just an easy way to package up the thread and allow an application to do programatic transaction demarcation using the Hibernate libraries. It's basic, but it's functional.

Just have one session manager. Sometimes when you go to two database, you may need two session factories, but really you only need one.

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