Re: varying message credit

[Gordon Sim <gs...@redhat.com>]

Adam Chase wrote:
> I am talking about the CPP broker.  I see there's a flush on the
> Session, but not the Subscription.

There are two uses of the term 'flush' in AMQP (and consequently in the 
c++ API).

There is the Session::messageFlush() session 'command' which Carl is 
referring to that flushes a subscription. Note there is also a 
Session::messageStop() command which simply asks the broker to delete 
all available credit without using the existing credit to send messages.

There is also the separate concept of flushing completion state. A flush 
'control' simply requests that the peer responds with information on the 
commands it has so far completed (without forcing it to complete all 
outstanding commands as a sync would). This is what is triggered by the 
Session::flush() call.

> Is that the one you mean?  Would it affect all of my subscriptions?
> 
> Thanks,
> 
> Adam
> 
> On Mon, Jan 26, 2009 at 5:31 PM, Carl Trieloff <cc...@redhat.com> wrote:
>> yes, flush. it will consume as many messages as it can based on your credit
>> and then
>> clear the credit - that is until more is issued
>>
>> Carl.
>>
>>
>> Adam Chase wrote:
>>> Is there any way to take back message credit?
>>>
>>> For example, say there are only 10 messages in a queue and I want "all
>>> the messages".  I add 100 of credit, and get the 10 messages.  After
>>> that, I want to take those new messages only a 1 at a time.
>>>
>>> I see that you can set the subscriptionSettings after subscribing.
>>> Might that be a way?
>>>
>>> Thanks,
>>>
>>> Adam
>>>
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>>> Apache Qpid - AMQP Messaging Implementation
>>> Project:      http://qpid.apache.org
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>>>
>>
>> ---------------------------------------------------------------------
>> Apache Qpid - AMQP Messaging Implementation
>> Project:      http://qpid.apache.org
>> Use/Interact: mailto:users-subscribe@qpid.apache.org
>>
>>
> 
> ---------------------------------------------------------------------
> Apache Qpid - AMQP Messaging Implementation
> Project:      http://qpid.apache.org
> Use/Interact: mailto:users-subscribe@qpid.apache.org
> 


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