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| about disconnect and close |
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| leo.yue |
 Posted: Sat Apr 23, 2005 6:33 am Post subject: about disconnect and close |
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Acolyte
Joined: 20 Oct 2004
Posts: 52
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who can tell me the difference between disconnect and close on MQQueuemanager?
thanks a lot! |
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| clindsey |
| Posted: Sat Apr 23, 2005 9:30 am Post subject: |
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Knight
Joined: 12 Jul 2002
Posts: 586
Location: Dallas, Tx
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I do not believe the MQQueueManager class has a close method. It only has a disconnect, which closes the connection to the queue manager and frees resources.
The managed mq objects, such as MQQueue have a close method. This is like any other close method. It indicates you are finished using the object and any open resources are freed.
BTW, a MQQueueManager disconnect will close any managed objects that you did not close.
Charlie |
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| PeterPotkay |
| Posted: Sat Apr 23, 2005 10:46 am Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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I just checked, and in VB.net, the QM object does have a .close method, which I do not understand, as there is no .open method.
In COBOL, if you wanted to MQINQ the QM, you had to MQCONN to the QM, then MQOPEN the QM with the inquire option, do the MQINQ call against the open QM, MQCLOSE the QM, then MQDISC. But in Java and .NET, it looks like you can get those attributes of the QM as soon as you create the QM object, so the open method is not needed. Why the heck is there then a close method????
The manuals do not say anything about it even existing, but its there.
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Peter Potkay
Keep Calm and MQ On |
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| fjb_saper |
| Posted: Sat Apr 23, 2005 5:43 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| Could it be that the disconnect method is invoking it ?? |
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| jefflowrey |
| Posted: Sat Apr 23, 2005 7:02 pm Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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Most object-oriented languages provide finallizers/destructors, code that an object can define that will get run just before that object is garbage-collected.
This allows things like queue manager objects to disconnect themselves, without needing explicit disconnect calls from application code - they know it's safe to disconnect because they know they are about to get deleted!
Likewise, it seems apparent that the QM object in question does a connect during it's constructor. So, again, you don't need to explicitly instruct it to connect - because by the time it's available to receive instructions, it's already connected.
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I am *not* the model of the modern major general. |
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| leo.yue |
| Posted: Sun Apr 24, 2005 3:29 am Post subject: |
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Acolyte
Joined: 20 Oct 2004
Posts: 52
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Thanks for your reply
close method is in its super class - MQManagedObject |
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