Github user pnowojski commented on a diff in the pull request:
https://github.com/apache/flink/pull/5239#discussion_r159877503
--- Diff:
flink-streaming-java/src/main/java/org/apache/flink/streaming/api/operators/StreamTaskStateManager.java
---
@@ -0,0 +1,48 @@
+/*
+ * 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.streaming.api.operators;
+
+import org.apache.flink.api.common.typeutils.TypeSerializer;
+import org.apache.flink.core.fs.CloseableRegistry;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
+/**
+ * This is the interface through which stream task expose a {@link
StreamOperatorStateContext} to their operators.
+ * Operators, in turn, can use the context to initialize everything
connected to their state, such as backends or
+ * a timer service manager.
+ */
+public interface StreamTaskStateManager {
--- End diff --
As we discussed, you could rename this class to
`StreamTaskStateInitializer` and limit it's life scope.
---
