narendly commented on a change in pull request #745: Add RealmAwareZkClient and
RealmAwareZkClientFactory interfaces
URL: https://github.com/apache/helix/pull/745#discussion_r379164173
##########
File path:
zookeeper-api/src/main/java/org/apache/helix/zookeeper/api/client/RealmAwareZkClient.java
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@@ -40,7 +41,24 @@
import org.apache.zookeeper.data.Stat;
+/**
+ * The Realm-aware ZkClient interface.
+ * NOTE: "Realm-aware" does not necessarily mean that the RealmAwareZkClient
instance will be connecting to multiple ZK realms.
+ * On single-realm mode, RealmAwareZkClient will reject requests going out to
other ZK realms than the one set at initialization.
+ * On multi-realm mode, RealmAwareZkClient will connect to multiple ZK realms
but will reject EPHEMERAL AccessMode operations.
+ */
public interface RealmAwareZkClient {
+
+ /**
+ * Specifies which mode to run this RealmAwareZkClient on.
+ *
+ * SINGLE_REALM: CRUD, change subscription, and EPHEMERAL CreateMode are
supported.
+ * MULTI_REALM: CRUD and change subscription are supported. Operations
involving EPHEMERAL CreateMode will throw an UnsupportedOperationException.
+ */
+ enum MODE {
+ SINGLE_REALM, MULTI_REALM
Review comment:
updated!
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