Github user dragonsinth commented on a diff in the pull request:
https://github.com/apache/lucene-solr/pull/32#discussion_r61507382
--- Diff:
solr/solrj/src/java/org/apache/solr/common/cloud/ZkStateReader.java ---
@@ -484,6 +498,12 @@ private void refreshLegacyClusterState(Watcher watcher)
}
this.legacyCollectionStates = loadedData.getCollectionStates();
this.legacyClusterStateVersion = stat.getVersion();
+ for (Map.Entry<String, ClusterState.CollectionRef> entry :
this.legacyCollectionStates.entrySet()) {
+ if (entry.getValue().isLazilyLoaded() == false) {
+ // a watched collection - trigger notifications
+ notifyStateWatchers(entry.getKey(), entry.getValue().get());
+ }
+ }
--- End diff --
I think it would add a lot of value here to actually check differences.
There really wouldn't be much computational work since you could restrict it to
watched collections. Something like:
```
for (Map.Entry<String, CollectionWatch> watchEntry :
this.collectionWatches.entrySet()) {
String coll = watchEntry.getKey();
CollectionWatch collWatch = watchEntry.getValue();
DocCollection newState =
this.legacyCollectionStates.get(coll).get();
if (!collWatch.stateWatchers.isEmpty()
&& !Objects.equals(oldCollectionStates.get(coll).get(),
newState)) {
notifyStateWatchers(coll, newState);
}
}
```
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