content: /*
   * 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.
   */
  
  /**
   * Library for launching Spark applications.
   *
   * <p>
   * This library allows applications to launch Spark programmatically. There's only one entry
   * point to the library - the {@link org.apache.spark.launcher.SparkLauncher} class.
   * </p>
   *
   * <p>
   * The {@link org.apache.spark.launcher.SparkLauncher#startApplication(
   * org.apache.spark.launcher.SparkAppHandle.Listener...)} can be used to start Spark and provide
   * a handle to monitor and control the running application:
   * </p>
   *
   * <pre>
   * {@code
   *   import org.apache.spark.launcher.SparkAppHandle;
   *   import org.apache.spark.launcher.SparkLauncher;
   *
   *   public class MyLauncher {
   *     public static void main(String[] args) throws Exception {
   *       SparkAppHandle handle = new SparkLauncher()
   *         .setAppResource("/my/app.jar")
   *         .setMainClass("my.spark.app.Main")
   *         .setMaster("local")
   *         .setConf(SparkLauncher.DRIVER_MEMORY, "2g")
   *         .startApplication();
   *       // Use handle API to monitor / control application.
   *     }
   *   }
   * }
   * </pre>
   *
   * <p>
   * It's also possible to launch a raw child process, using the
   * {@link org.apache.spark.launcher.SparkLauncher#launch()} method:
   * </p>
   *
   * <pre>
   * {@code
   *   import org.apache.spark.launcher.SparkLauncher;
   *
   *   public class MyLauncher {
   *     public static void main(String[] args) throws Exception {
   *       Process spark = new SparkLauncher()
   *         .setAppResource("/my/app.jar")
   *         .setMainClass("my.spark.app.Main")
   *         .setMaster("local")
   *         .setConf(SparkLauncher.DRIVER_MEMORY, "2g")
   *         .launch();
   *       spark.waitFor();
   *     }
   *   }
   * }
   * </pre>
   *
   * <p>This method requires the calling code to manually manage the child process, including its
   * output streams (to avoid possible deadlocks). It's recommended that
   * {@link org.apache.spark.launcher.SparkLauncher#startApplication(
   *   org.apache.spark.launcher.SparkAppHandle.Listener...)} be used instead.</p>
   */
  package org.apache.spark.launcher;
  