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From "Ted Ross" <tr...@apache.org>
Subject Review Request: Change queue-depth threshold alerts to be crossing-triggered rather than level-sensitive.
Date Fri, 08 Mar 2013 15:13:08 GMT

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Review request for qpid.


Change the queue-depth threshold alerts to be edge-triggered rather than level-sensitive.
 Provide upper and lower thresholds for both message count and byte count.  Two events are
generated:  "Crossing-Upward" events are raised when the upper threshold is crossed lower-to-higher
and "Crossing-Downward" events are raised when the lower threshold is crossed higher-to-lower.

This removes the need for a mechanism to throttle events and it also removes the need for
special handling for recursion (thresholds-on-the-event-queue).

If the lower thresholds are not specified or invalid, they are set to half of the upper threshold.

This addresses bug QPID-4632.


  trunk/qpid/cpp/src/qpid/broker/QueueSettings.h 1454413 
  trunk/qpid/cpp/src/qpid/broker/QueueSettings.cpp 1454413 
  trunk/qpid/cpp/src/qpid/broker/ThresholdAlerts.h 1454413 
  trunk/qpid/cpp/src/qpid/broker/ThresholdAlerts.cpp 1454413 
  trunk/qpid/specs/management-schema.xml 1454413 
  trunk/qpid/tests/src/py/qpid_tests/broker_0_10/threshold.py 1454413 

Diff: https://reviews.apache.org/r/9824/diff/


The existing tests were modified and a new test for threshold hysteresis was added.


Ted Ross

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