Github user tillrohrmann commented on a diff in the pull request:
https://github.com/apache/flink/pull/2594#discussion_r82563195
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/query/KvStateRegistryGateway.java
---
@@ -0,0 +1,57 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.runtime.query;
+
+import org.apache.flink.api.common.JobID;
+import org.apache.flink.runtime.jobgraph.JobVertexID;
+import org.apache.flink.runtime.rpc.RpcGateway;
+import org.apache.flink.runtime.state.KeyGroupRange;
+
+public interface KvStateRegistryGateway extends RpcGateway {
+ /**
+ * Notifies the listener about a registered KvState instance.
+ *
+ * @param jobId Job ID the KvState instance belongs to
+ * @param jobVertexId JobVertexID the KvState instance belongs to
+ * @param keyGroupRange Key group range the KvState instance belongs
to
+ * @param registrationName Name under which the KvState is registered
+ * @param kvStateId ID of the KvState instance
+ */
+ void notifyKvStateRegistered(
+ JobID jobId,
--- End diff --
It depends a little bit on where the `KvStateRegistry` will be running. If
it runs on the RM, then we would need it. If it's running on the JM, then
you're right and we won't need it. I think for the moment we can leave the
queryable state implementation out. Once we've implemented the basic Flip-6
behaviour, we can also fix the queryable state abstraction.
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