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(chore): refactor batch event processor to use blocking queue poll and take so as not to spin too much. #343

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merged 7 commits into from
Oct 23, 2019
Merged

(chore): refactor batch event processor to use blocking queue poll and take so as not to spin too much. #343

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4ecfce9
need to reset the deadline after it is hit once.
thomaszurkan-optimizely Oct 18, 2019
1b919a3
use flush interval for event queue polling
thomaszurkan-optimizely Oct 21, 2019
48f7fd8
use take if you have timed out enough
thomaszurkan-optimizely Oct 22, 2019
29e2067
refactor to only reset interval in one place.
thomaszurkan-optimizely Oct 22, 2019
c64b8d4
remove lambda after discussion with miked
thomaszurkan-optimizely Oct 22, 2019
a3fcaa5
fix log message
thomaszurkan-optimizely Oct 22, 2019
78f1cd6
check if deadline is equal or passed since we set timeout at deadline
thomaszurkan-optimizely Oct 23, 2019
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8 changes: 5 additions & 3 deletions core-api/src/main/java/com/optimizely/ab/event/BatchEventProcessor.java
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Original file line number Diff line number Diff line change
Expand Up @@ -133,12 +133,14 @@ public void run() {
if (System.currentTimeMillis() > deadline) {
logger.debug("Deadline exceeded flushing current batch.");
flush();
deadline = System.currentTimeMillis() + flushInterval;
}

Object item = eventQueue.poll(50, TimeUnit.MILLISECONDS);
Object item = eventQueue.poll(flushInterval, TimeUnit.MILLISECONDS);
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Let's make this another configuration option. If we set to flushInterval then the messages are only guaranteed to be dispatched every (2 * flushInterval) milliseconds. I'd like to better understand the CPU and battery utilization with a change like this.

if (item == null) {
logger.debug("Empty item, sleeping for 50ms.");
Thread.sleep(50);
logger.debug("Empty item after waiting flush interval. Flushing.");
flush();
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This flush() is not necessary since it will be captured on the next while iteration. in general I'd like to keep the number of places we're calling flush() and setting the deadline to a minimum. (Ideally one place)

deadline = System.currentTimeMillis() + flushInterval;
continue;
}

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