How to set AcknowledgeMode in Spring?

[gunacesun_spring]

Hi all,

I want to do something similar to the following code using Spring. Could someone tell me how?

Session sess = conn.createSession(false, Session.CLIENT_ACKNOWLEDGE);
on the sender

and also

message.acknowledge() on the listener which is an MDP.

Thanks.
Ganesh.

[denis.zhdanov]

setSessionAcknowledgeMode()
setSessionAcknowledgeModeName()

[gunacesun_spring]

Thanks Denis.

If I want the listener to acknowledge as soon as the message is received, how would I do that?

Thanks.
Ganesh.

[Skulkarni]

Hi Ganesh,
If you are using JMS template and DMLC then did you try setting this property
<property name="sessionAcknowledgeModeName" alue="CLIENT_ACKNOWLEDGE"/>

and in OnMessage(Message a_jmsMsg)

a_jmsMsg.acknowledge();

thanks
Shishir

[gunacesun_spring]

Oh yeah, I tried mesage.acknowledge().

But I want send the acknowledgment before processing the message. I do a lot of DB processing and I wanted to acknowledge the receipt of the message as soon as the message is received, even before processing it.

Is there any way to do this?

Thanks.
Ganesh.

[Skulkarni]

Hi Ganesh,
You can try acknowledge as the first step in OnMessage or try the AUTO_ACKNOWLEDGE instead of CLIENT_ACKNOWLEDGE.

Thanks
shishir

[gunacesun_spring]

Thanks Shishir.

I've tried both and neither works the way I want.

Ganesh.

[denis.zhdanov]

Thanks Shishir.

I've tried both and neither works the way I want.

Ganesh.

So, you defined CLIENT_ACKNOWLEDGE mode and acknowledge the message as the first mdp statement. What means 'neither works the way I want'? What kind of problem are you experiencing?

[gunacesun_spring]

By 'neither works the way I want', I mean, in either case the receiver seems to wait for the processing of the message to complete before sending the acknowledgment back.

In my case, when the acknowledgment is sent back after a time consuming process, I get a "Broken Pipe" exception.

Ganesh.

[Skulkarni]

Hi Ganesh,
Are you processing the message after receiving in the OnMessage() itself . Or are are you spawning a thread to handle the message processing?
The way i have used it, is to keep OnMessage() as light as possible in terms of processing viz(add message to a queue or set and then process it in a separate thread) but acknowledge it as soon as you can.

Thanks
shishir