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| bijesh |
 Posted: Wed Feb 28, 2007 4:36 am Post subject: MQMessage to MbMessage |
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Acolyte
Joined: 30 Jan 2007
Posts: 66
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Hi,
I'm making use of a Java compute node to read messages from a queue. The message is of MQMessage type.
But if I need to propagate it from Java compute node , the message need to be of type MbMessage. Any thoughts on this.
Regards,
Bijesh |
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| jefflowrey |
| Posted: Wed Feb 28, 2007 4:39 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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Why can't you use the MQGet node instead?
The documentation has information on how to create a new message, did that not apply to your particular case somehow?
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| bijesh |
| Posted: Wed Feb 28, 2007 4:58 am Post subject: |
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Acolyte
Joined: 30 Jan 2007
Posts: 66
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| Did thought about the MQGet node. But since I'd to do some Queu operations like, getCurrentDepth, getMaximumDepth etc. settled for Java Compute node. |
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| au@kosa |
| Posted: Wed Feb 28, 2007 4:59 am Post subject: |
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Centurion
Joined: 04 Jan 2007
Posts: 103
Location: pune
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| jefflowrey |
| Posted: Wed Feb 28, 2007 5:23 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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What are you actually trying to do?
There's almost never any reason for a non-monitoring program to care about the current depth of a queue or the maximum depth of a queue. That you are thinking of getting this information raises many red flags that you are trying to do something "the wrong way" for MQ.
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| bijesh |
| Posted: Wed Feb 28, 2007 5:33 am Post subject: |
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Acolyte
Joined: 30 Jan 2007
Posts: 66
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Can't I make use of MQ APIs from Java compute node?
What I'm trying to do
I want to get the messages from a queue. I need to have a look at the current depth of the queue as well.
So i'm making use of Java compute node. From Java compute node I need to propagate the message that is read from the queue to the next node.
Now the message I get after reading from the queue will be of MQMessage type. But if i want to propagate it from the Java compute node, the message should be of type MbMessage.
Hope I'd stated the problem properly. |
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| jefflowrey |
| Posted: Wed Feb 28, 2007 5:36 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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WHY do you need to look at the current depth of the queue?
Yes, you *can* do this.
It's not clear that you *should* do this.
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| bijesh |
| Posted: Wed Feb 28, 2007 5:41 am Post subject: |
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Acolyte
Joined: 30 Jan 2007
Posts: 66
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WHY do you need to look at the current depth of the queue?
That is due to the design constraint.
Yes, you *can* do this.
using MQ APIs?
It's not clear that you *should* do this.
What are the implications If I use the MQ APIs? |
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| jefflowrey |
| Posted: Wed Feb 28, 2007 5:50 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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WHAT design constraints, please?
Yes, you should be able to use the MQ APIs from a Java Compute node. You will need to exercise some caution, though, about connection handles and etc, to ensure that you do not inadvertently interrupt the transactional handling of the Broker flow itself.
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| bijesh |
| Posted: Wed Feb 28, 2007 5:56 am Post subject: |
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Acolyte
Joined: 30 Jan 2007
Posts: 66
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WHAT design constraints, please?
I need to look at the current depth of another queue.
if the current depth is less than a particular count then only i'l hv to get the message from the queue. |
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| jefflowrey |
| Posted: Wed Feb 28, 2007 6:06 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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That's horrible.
Please don't design that way.
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| bijesh |
| Posted: Wed Feb 28, 2007 6:23 am Post subject: |
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Acolyte
Joined: 30 Jan 2007
Posts: 66
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| jefflowrey wrote: |
That's horrible.
Please don't design that way. |
How else can i go ahead.? |
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| jefflowrey |
| Posted: Wed Feb 28, 2007 6:41 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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It sounds like you're trying to implement some kind of weird broker based Trigger on Queue Depth.
I really can't suggest a better course without knowing the real problem you're actually trying to solve - but I will say that when working with Broker you should always design to process messages immediately as they come in, and always process a queue until it's empty.
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| Vitor |
| Posted: Wed Feb 28, 2007 11:52 pm Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| bijesh wrote: |
I need to look at the current depth of another queue.
if the current depth is less than a particular count then only i'l hv to get the message from the queue. |
That's just bizzare. Like a Depth trigger in reverse.
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