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https://reviews.apache.org/r/9824/
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Review request for qpid.


Description
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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.
    https://issues.apache.org/jira/browse/QPID-4632


Diffs
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  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/


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


Thanks,

Ted Ross

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