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From rxin <...@git.apache.org>
Subject [GitHub] spark pull request: [SPARK-3543] Write TaskContext in Java and exp...
Date Thu, 18 Sep 2014 07:57:15 GMT
Github user rxin commented on a diff in the pull request:

    https://github.com/apache/spark/pull/2425#discussion_r17713674
  
    --- Diff: core/src/main/java/org/apache/spark/TaskContext.java ---
    @@ -0,0 +1,234 @@
    +/*
    + * 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.spark;
    +
    +import java.io.Serializable;
    +import java.util.ArrayList;
    +import java.util.Collections;
    +import java.util.List;
    +
    +import scala.Function0;
    +import scala.Function1;
    +import scala.Unit;
    +import scala.collection.JavaConversions;
    +
    +import org.apache.spark.annotation.DeveloperApi;
    +import org.apache.spark.executor.TaskMetrics;
    +import org.apache.spark.util.TaskCompletionListener;
    +import org.apache.spark.util.TaskCompletionListenerException;
    +
    +/**
    +* :: DeveloperApi ::
    +* Contextual information about a task which can be read or mutated during execution.
    +*/
    +@DeveloperApi
    +public class TaskContext implements Serializable {
    +
    +  private Integer stageId;
    +  private Integer partitionId;
    +  private Long attemptId;
    +  private Boolean runningLocally;
    +  private TaskMetrics taskMetrics;
    +
    +  /**
    +   * :: DeveloperApi ::
    +   * Contextual information about a task which can be read or mutated during execution.
    +   *
    +   * @param stageId stage id
    +   * @param partitionId index of the partition
    +   * @param attemptId the number of attempts to execute this task
    +   * @param runningLocally whether the task is running locally in the driver JVM
    +   * @param taskMetrics performance metrics of the task
    +   */
    +  @DeveloperApi
    +  public TaskContext(Integer stageId, Integer partitionId, Long attemptId, Boolean runningLocally,
    +                     TaskMetrics taskMetrics) {
    +    this.attemptId = attemptId;
    +    this.partitionId = partitionId;
    +    this.runningLocally = runningLocally;
    +    this.stageId = stageId;
    +    this.taskMetrics = taskMetrics;
    +    taskContext.set(this);
    +  }
    +
    +
    +  /**
    +   * :: DeveloperApi ::
    +   * Contextual information about a task which can be read or mutated during execution.
    +   *
    +   * @param stageId stage id
    +   * @param partitionId index of the partition
    +   * @param attemptId the number of attempts to execute this task
    +   * @param runningLocally whether the task is running locally in the driver JVM
    +   */
    +  @DeveloperApi
    +  public TaskContext(Integer stageId, Integer partitionId, Long attemptId,
    +                     Boolean runningLocally) {
    +    this.attemptId = attemptId;
    +    this.partitionId = partitionId;
    +    this.runningLocally = runningLocally;
    +    this.stageId = stageId;
    +    this.taskMetrics = TaskMetrics.empty();
    +    taskContext.set(this);
    +  }
    +
    +
    +  /**
    +   * :: DeveloperApi ::
    +   * Contextual information about a task which can be read or mutated during execution.
    +   *
    +   * @param stageId stage id
    +   * @param partitionId index of the partition
    +   * @param attemptId the number of attempts to execute this task
    +   */
    +  @DeveloperApi
    +  public TaskContext(Integer stageId, Integer partitionId, Long attemptId) {
    +    this.attemptId = attemptId;
    +    this.partitionId = partitionId;
    +    this.runningLocally = false;
    +    this.stageId = stageId;
    +    this.taskMetrics = TaskMetrics.empty();
    +    taskContext.set(this);
    +  }
    +
    +  private static ThreadLocal<TaskContext> taskContext =
    --- End diff --
    
    assuming i'm reading his mind correctly :)


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