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Subject [GitHub] [flink] shuai-xu commented on a change in pull request #8233: [FLINK-12227] [runtime] introduce SchedulingStrategy interface
Date Sun, 05 May 2019 08:50:28 GMT
shuai-xu commented on a change in pull request #8233: [FLINK-12227] [runtime] introduce SchedulingStrategy
interface
URL: https://github.com/apache/flink/pull/8233#discussion_r281011390
 
 

 ##########
 File path: flink-runtime/src/main/java/org/apache/flink/runtime/scheduler/strategy/SchedulingStrategy.java
 ##########
 @@ -0,0 +1,62 @@
+/*
+ * 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.scheduler.strategy;
+
+import org.apache.flink.runtime.execution.ExecutionState;
+import org.apache.flink.runtime.executiongraph.Execution;
+import org.apache.flink.runtime.executiongraph.IntermediateResultPartition;
+import org.apache.flink.runtime.io.network.partition.ResultPartitionID;
+
+import java.util.Set;
+
+/**
+ * Component which encapsulates the scheduling logic.
+ * It can react to execution state changes and partition consumable events.
+ * Moreover, it is responsible for resolving task failures.
+ */
+public interface SchedulingStrategy {
+
+	/**
+	 * Called when the scheduling is started (initial scheduling operation).
+	 */
+	void startScheduling();
+
+	/**
+	 * Called whenever vertices need to be restarted (due to task failure).
+	 *
+	 * @param verticesNeedingRestart The tasks need to be restarted.
+	 */
+	void restartTasks(Set<ExecutionVertexID> verticesNeedingRestart);
+
+	/**
+	 * Called whenever an {@link Execution} changes its state.
+	 *
+	 * @param executionVertexId The id of the task.
+	 * @param executionState The new state of the execution.
+	 */
+	void onExecutionStateChange(ExecutionVertexID executionVertexId, ExecutionState executionState);
+
+	/**
+	 * Called whenever an {@link IntermediateResultPartition} becomes consumable.
+	 *
+	 * @param executionVertexId The id of the task whoes result partition becomes consumable.
 
 Review comment:
   Done

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