maytasm commented on a change in pull request #10371:
URL: https://github.com/apache/druid/pull/10371#discussion_r488385897
##########
File path:
server/src/main/java/org/apache/druid/server/coordinator/duty/NewestSegmentFirstIterator.java
##########
@@ -112,27 +114,38 @@
}
@Override
- public Object2LongOpenHashMap<String> totalRemainingSegmentsSizeBytes()
+ public Map<String, CompactionStatistics> totalRemainingStatistics()
{
- final Object2LongOpenHashMap<String> resultMap = new
Object2LongOpenHashMap<>();
- resultMap.defaultReturnValue(UNKNOWN_TOTAL_REMAINING_SEGMENTS_SIZE);
- for (QueueEntry entry : queue) {
- final VersionedIntervalTimeline<String, DataSegment> timeline =
dataSources.get(entry.getDataSource());
- final Interval interval = new
Interval(timeline.first().getInterval().getStart(), entry.interval.getEnd());
-
- final List<TimelineObjectHolder<String, DataSegment>> holders =
timeline.lookup(interval);
-
- long size = 0;
- for (DataSegment segment : FluentIterable
- .from(holders)
- .transformAndConcat(TimelineObjectHolder::getObject)
- .transform(PartitionChunk::getObject)) {
- size += segment.getSize();
- }
+ return remainingSegments;
+ }
+
+ @Override
+ public Map<String, CompactionStatistics> totalProcessedStatistics()
+ {
+ return processedSegments;
+ }
- resultMap.put(entry.getDataSource(), size);
+ @Override
+ public void flushAllSegments()
+ {
+ if (queue.isEmpty()) {
+ return;
+ }
+ QueueEntry entry;
+ while ((entry = queue.poll()) != null) {
+ final List<DataSegment> resultSegments = entry.segments;
+ final String dataSourceName = resultSegments.get(0).getDataSource();
+ // This entry was in the queue, meaning that it was not processed.
Hence, also aggregates it's
+ // statistic to the remaining segments counts.
+ collectSegmentStatistics(remainingSegments, dataSourceName, new
SegmentsToCompact(entry.segments));
+ final CompactibleTimelineObjectHolderCursor
compactibleTimelineObjectHolderCursor = timelineIterators.get(
+ dataSourceName
+ );
+ // WARNING: This iterates the compactibleTimelineObjectHolderCursor.
+ // Since this method is intended to only be use after all necessary
iteration is done on this iterator
Review comment:
I mean that this method (`flushAllSegments`), will iterates the
`compactibleTimelineObjectHolderCursor` in `iterateAllSegments` method call.
This class `NewestSegmentFirstIterator` when use as a iterator in the next()
method will also iterate the `compactibleTimelineObjectHolderCursor`.
Hence, this iterator (`NewestSegmentFirstIterator) cannot be use to iterate
after this method (`flushAllSegments`) is called.
Basically, you cannot call `flushAllSegments` while iterating the
NewestSegmentFirstIterator and you cannot call `flushAllSegments` then go back
to iterating the NewestSegmentFirstIterator
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