zacharymorn commented on a change in pull request #2342:
URL: https://github.com/apache/lucene-solr/pull/2342#discussion_r574958684
##########
File path: lucene/core/src/java/org/apache/lucene/index/IndexWriter.java
##########
@@ -3518,15 +3518,30 @@ private long prepareCommitInternal() throws IOException
{
}
if (pointInTimeMerges != null) {
+ MergePolicy.OneMerge nextMerge = null;
+
+ if (pendingMerges.size() > 0) {
+ // nocommit getting OneMerge instance here via
mergeSource.getNextMerge() will
Review comment:
No problem! From the context I assume you are actually meaning to pass
`pointInTimeMerges` into event listener, since `pendingMerges` is of type
`Deque<MergePolicy.OneMerge>`? I've pushed a commit to use `pointInTimeMerges`
for now.
##########
File path:
lucene/core/src/test/org/apache/lucene/index/TestIndexWriterMergePolicy.java
##########
@@ -388,6 +388,69 @@ public void testMergeOnCommit() throws IOException {
dir.close();
}
+ private class TesIndexWriterEventListener implements
IndexWriterEventListener {
+ private boolean beginMergeCalled = false;
+ private boolean endMergeCalled = false;
+
+ @Override
+ public void beginMergeOnFullFlush(MergePolicy.OneMerge merge) {
+ beginMergeCalled = true;
+ }
+
+ @Override
+ public void endMergeOnFullFlush(MergePolicy.OneMerge merge) {
+ endMergeCalled = true;
+ }
+
+ public boolean isEventsRecorded() {
+ return beginMergeCalled && endMergeCalled;
+ }
+ }
+
+ // Test basic semantics of merge on commit and events recording invocation
+ public void testMergeOnCommitWithEventListener() throws IOException {
Review comment:
Makes sense. Added.
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