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When does our JMS application actually initiates/starts the connection with queue?

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Eclipse IDE Tomcat Server Java
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I have created a JMS application to interface with MQ series for sending/receiving messages. The application works fine.

I was wondering when does our application actually interfaces [starts a connection] with MQ

Is it when after we create the queue session object or the queue connection object or when we call the start() method from queueConnection reference?

There are "for loops" inside message sending program, which keep sending messages to same queue & queue manager until a condition is reached. So i was worried if i am opening the connection un-necessarily every time when i send each message for each iteration!

I wanted to make sure that i use the same session and connection for each iteration in the loop because the queue and queue manager name are the same! I assume that creating connection/sessions each time will degrade performance and its not necessary!

So in the above shown code, at which line the actual connection with MQ starts?

Is it Line no 6 or 7 or 8 or 12 or 13?

I can put that line top of the message sending method once for all, so that i am avoiding performance issues!.
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