Github user StefanRRichter commented on a diff in the pull request:
https://github.com/apache/flink/pull/5239#discussion_r162583759
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/state/TaskStateManagerImpl.java
---
@@ -0,0 +1,115 @@
+/*
+ * 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.state;
+
+import org.apache.flink.api.common.JobID;
+import org.apache.flink.runtime.checkpoint.CheckpointMetaData;
+import org.apache.flink.runtime.checkpoint.CheckpointMetrics;
+import org.apache.flink.runtime.checkpoint.JobManagerTaskRestore;
+import org.apache.flink.runtime.checkpoint.OperatorSubtaskState;
+import org.apache.flink.runtime.checkpoint.TaskStateSnapshot;
+import org.apache.flink.runtime.executiongraph.ExecutionAttemptID;
+import org.apache.flink.runtime.jobgraph.OperatorID;
+import org.apache.flink.runtime.taskmanager.CheckpointResponder;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
+/**
+ * This class is the default implementation of {@link TaskStateManager}
and collaborates with the job manager
+ * through {@link CheckpointResponder}) as well as a task-manager-local
state store. Like this, client code does
+ * not have to deal with the differences between remote or local state on
recovery because this class handles both
+ * cases transparently.
+ *
+ * Reported state is tagged by clients so that this class can properly
forward to the right receiver for the
+ * checkpointed state.
+ *
+ * TODO: all interaction with local state store must still be implemented!
It is currently just a placeholder.
+ */
+public class TaskStateManagerImpl implements TaskStateManager {
+
+ /** The id of the job for which this manager was created, can report,
and recover. */
+ private final JobID jobId;
+
+ /** The execution attempt id that this manager reports for. */
+ private final ExecutionAttemptID executionAttemptID;
+
+ /** The data given by the job manager to restore the job. This is not
set for a new job without previous state. */
+ private final JobManagerTaskRestore jobManagerTaskRestore;
+
+ /** The local state store to which this manager reports local state
snapshots. */
+ private final TaskLocalStateStore localStateStore;
+
+ /** The checkpoint responder through which this manager can report to
the job manager. */
+ private final CheckpointResponder checkpointResponder;
+
+ public TaskStateManagerImpl(
+ JobID jobId,
+ ExecutionAttemptID executionAttemptID,
+ TaskLocalStateStore localStateStore,
+ JobManagerTaskRestore jobManagerTaskRestore,
+ CheckpointResponder checkpointResponder) {
+
+ this.jobId = jobId;
+ this.localStateStore = localStateStore;
--- End diff --
ð
---
