hiteshk25 commented on code in PR #1585:
URL: https://github.com/apache/solr/pull/1585#discussion_r1187598453
##########
solr/solrj-zookeeper/src/java/org/apache/solr/common/cloud/ZkStateReader.java:
##########
@@ -368,10 +368,152 @@ private StatefulCollectionWatch compute(
BiFunction<String, StatefulCollectionWatch, StatefulCollectionWatch>
remappingFunction) {
return statefulWatchesByCollectionName.compute(collectionName,
remappingFunction);
}
+
+ public boolean isWatched(String coll) {
+ return statefulWatchesByCollectionName.containsKey(coll);
+ }
}
- private static class StatefulCollectionWatch extends
CollectionWatch<DocCollectionWatcher> {
+ private class StatefulCollectionWatch extends
CollectionWatch<DocCollectionWatcher> {
private DocCollection currentState;
+
+ Watcher persistentWatcher;
+
+ final String coll;
+ private final String collectionPath;
+
+ private StatefulCollectionWatch(String coll) {
+ this.coll = coll;
+ this.collectionPath = DocCollection.getCollectionPath(coll);
+ }
+
+ public void handleWatch(WatchedEvent event) {
+ if (!collectionWatches.isWatched(coll)) {
+ return;
+ }
+ if (log.isTraceEnabled()) {
+ log.trace("an event happened for {}, event: {}", coll,
event.toString());
+ }
+ DocCollection collectionState = getCollection(coll);
+ if (collectionPath.equals(event.getPath())) {
+ DocCollection newState = null;
+ try {
+ newState = fetchCollectionState(coll, null);
+ } catch (KeeperException.SessionExpiredException
+ | KeeperException.ConnectionLossException e) {
+ log.warn("ZooKeeper watch triggered, but Solr cannot talk to ZK: ",
e);
+ } catch (KeeperException e) {
+ log.error("exception for collection: [{}]", coll, e);
+ throw new ZooKeeperException(ErrorCode.SERVER_ERROR, "A ZK error has
occurred", e);
+ } catch (InterruptedException e) {
+ Thread.currentThread().interrupt();
+ log.error("exception for collection: [{}]", coll, e);
+ }
+ collectionWatches.updateDocCollection(coll, newState);
+ synchronized (getUpdateLock()) {
+ constructState(Collections.singleton(coll));
+ }
+ }
+ if (collectionState != null && collectionState.isPerReplicaState()) {
Review Comment:
I think we can move all prs event handing related code in `prs` class,
instead of keeping here?
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