"Programming in Apache Qpid" doesn't discuss capacity/credit
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Key: QPID-2714
URL: https://issues.apache.org/jira/browse/QPID-2714
Project: Qpid
Issue Type: Bug
Components: Documentation
Affects Versions: 0.7
Reporter: Steve Huston
Priority: Minor
Attachments: QPID-2714.patch
My comments grew out of looking at the C++ messaging API, though this probably
applies to Python and .NET as well.
During a discussion on us...@qpid I initiated recently I learned that creating
a number of Receivers and calling session.nextReceiver() to wait for a message
on any of the Receivers doesn't work unless some capacity is granted to the
Receivers first. This is different from simply calling fetch() on a Receiver
with no capacity - in that case the client code issues credit behind the scenes.
The code example shown in section 6 won't work (I used something very similar
in a program I wrote, and it didn't for the reason above). I'll attach a patch
that fixes the C++ code example, but there should be an introduction/discussion
of the whole topic of capacity, credit, acks, etc.
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