JBoss connection pooling

sweth_smile Apr 16, 2012 4:40 PM

Hi All,

I am new to JBoss AS. I am using Jboss connection pooling to connect to MS- SQL DB.

In my code first i am getting a new connection, and i execute the query and get the results. But i didnt close the connection explictly.

During second call to the code i am checking whether the connection obj is null if so i am creating a new connection else i am resuing the existing connection.

My questions are:

1. What will happen to a connection after i execute a query and didnt issue close? How long will it be active and what will be its state?

2. how will jboss release a connection from pool?

Please advise on the same

Thanks

-Swetha

1. Re: JBoss connection pooling

peterj Apr 16, 2012 5:21 PM (in response to sweth_smile)

Which version of JBoss AS? I think that 7.x bechaves somewhat differnetly that earlier versions. But if you mean 6.x or earlier, there are some thoughts:

* If you fail to close a connection when you app responds to a request, the app server will "close" the connection for you. (There should be a log message about this)
* Closing a connection really means "placing the connection back into the connection pool"
* Opening a connection really means "obtaining a connection from the connection pool"
* No physical connections are made to the database until a connection is requested. At that time min-pool-size physical connections are created and placed into the pool, one ofwhich is returned to the requester.
* If a connection remains unused for idle-timeout-minutes, it is physically closed and removed from the pool. (If that causes less than min-pool-size connections to be open, a new physical connection is opened and added to the pool.)
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