[GitHub] [flink] zentol commented on a change in pull request #9165: [FLINK-13055] [runtime] Leverage JM tracked partitions to find out unavailable partitions in …

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zentol commented on a change in pull request #9165: [FLINK-13055] [runtime] Leverage JM tracked partitions to find out unavailable partitions in …
URL: https://github.com/apache/flink/pull/9165#discussion_r305314766
 
 

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 File path: flink-runtime/src/main/java/org/apache/flink/runtime/executiongraph/ExecutionGraphResultPartitionAvailabilityChecker.java
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+/*
+ * 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.executiongraph;
+
+import org.apache.flink.runtime.executiongraph.failover.flip1.ResultPartitionAvailabilityChecker;
+import org.apache.flink.runtime.io.network.partition.PartitionTracker;
+import org.apache.flink.runtime.jobgraph.IntermediateResultPartitionID;
+
+import static org.apache.flink.util.Preconditions.checkNotNull;
+
+/**
+ * A {@link ResultPartitionAvailabilityChecker} which decides the intermediate result partition availability
+ * based on whether the corresponding result partition in the execution graph is tracked.
+ */
+public class ExecutionGraphResultPartitionAvailabilityChecker implements ResultPartitionAvailabilityChecker {
+
+	/** The execution graph that hosts the result partitions. */
+	private final ExecutionGraph executionGraph;
+
+	/** The tracker that tracks all available result partitions. */
+	private final PartitionTracker partitionTracker;
+
+	ExecutionGraphResultPartitionAvailabilityChecker(final ExecutionGraph executionGraph) {
 
 Review comment:
   pass in a `Function<IntermediateResultPartitionID, ResultPartitionID>` instead; this can then be a simply method reference `ExecutionGraph::createResultPartitionId`.
   The `ExecutionGraphResultPartitionAvailabilityChecker` could then be simplified by quite a bit.

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