Call NFPlugin.cleanup() at the end of the meter workflow#243
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NFPlugin.cleanup() is documented ('Method called for plugin cleanup') but
was never actually invoked anywhere in the package. Plugins that buffer
state across flows (e.g. time-window aggregators) therefore had no hook to
flush their final entries, silently losing them at end of capture.
Invoke udp.cleanup() for each plugin in meter_workflow, right after
meter_cleanup() expires the remaining cached flows (so all on_expire hooks
have already run) and before signalling completion.
Add test_plugin_cleanup: asserts cleanup() runs after all flows expire.
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Problem
NFPlugin.cleanup()is documented ("Method called for plugin cleanup") but is never actually invoked anywhere in the package. Plugins that buffer state across flows — time-window/bin aggregators, file writers, batched exporters — have no hook to flush their final buffered state, so that data is silently lost at the end of a capture.Fix
Invoke
udp.cleanup()for each plugin inmeter_workflow, right aftermeter_cleanup()has expired the remaining cached flows (so everyon_expirehook has already run) and before the meter signals completion viachannel.put(None).Test
Adds
test_plugin_cleanup: a plugin counts itson_expirecalls and writes the total fromcleanup(). The test asserts the marker file exists (i.e.cleanup()was actually called) and that the count equals the number of flows (i.e. it ran after all flows expired).