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What is the unit for Expiry of ImqMessage?

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yslee2

Posted: Tue Feb 19, 2008 1:06 am Post subject: What is the unit for Expiry of ImqMessage?

Newbie

Joined: 10 Jul 2006
Posts: 8

I am using the ImqMessage API in C++ and the document says that Expiry is a time-dependent quantity that controls how long WebSphere MQ retains
an unretrieved message before discarding it. The initial value is
MQEI_UNLIMITED.

What does it mean by time-dependent? And what is the actual unit?
My test tells me it is one-tenth of a second, but i want to confirm whether i am right.

Vitor

Posted: Tue Feb 19, 2008 2:26 am Post subject: Re: What is the unit for Expiry of ImqMessage?

Grand High Poobah

Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA

yslee2 wrote:

What does it mean by time-dependent?

It means it's dependent on the time the message has been in existence.

yslee2 wrote:

And what is the actual unit?My test tells me it is one-
tenth of a second, but i want to confirm whether i am right.

The C++ object wraps round the MQMD fields (including Expiry) which are documented in the Application Programming Reference, along with other information you might find useful.

Expiry is measured in tenths of a second (as per the APR). Note that expired messages may remain on a queue past their expiry time (visible in queue depth for instance) even though they can't actually be retrieved.
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yslee2

Posted: Tue Feb 19, 2008 4:01 am Post subject:

Newbie

Joined: 10 Jul 2006
Posts: 8

Thanks for answering. It clears all my confusion.

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