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https://issues.apache.org/jira/browse/SOLR-8323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15263038#comment-15263038
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ASF GitHub Bot commented on SOLR-8323:
--------------------------------------
Github user dragonsinth commented on a diff in the pull request:
https://github.com/apache/lucene-solr/pull/32#discussion_r61504824
--- Diff:
solr/solrj/src/java/org/apache/solr/common/cloud/DocCollection.java ---
@@ -210,6 +213,38 @@ public Replica getReplica(String coreNodeName) {
return null;
}
+ /**
+ * Check that all replicas in a collection are live
+ *
+ * @see CollectionStatePredicate
+ */
+ public static boolean isFullyActive(Set<String> liveNodes, DocCollection
collectionState) {
+ Objects.requireNonNull(liveNodes);
+ if (collectionState == null)
+ return false;
+ for (Slice slice : collectionState) {
+ for (Replica replica : slice) {
+ if (replica.isActive(liveNodes) == false)
+ return false;
+ }
+ }
+ return true;
+ }
+
+ /**
+ * Returns true if the passed in DocCollection is null
+ *
+ * @see CollectionStatePredicate
+ */
+ public static boolean isDeleted(Set<String> liveNodes, DocCollection
collectionState) {
+ return collectionState == null;
+ }
--- End diff --
maybe `exists`? isDeleted implies that it used to exist, but it may have
never been created
> Add CollectionWatcher API to ZkStateReader
> ------------------------------------------
>
> Key: SOLR-8323
> URL: https://issues.apache.org/jira/browse/SOLR-8323
> Project: Solr
> Issue Type: Improvement
> Affects Versions: master
> Reporter: Alan Woodward
> Assignee: Alan Woodward
> Attachments: SOLR-8323.patch, SOLR-8323.patch, SOLR-8323.patch,
> SOLR-8323.patch
>
>
> An API to watch for changes to collection state would be a generally useful
> thing, both internally and for client use.
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