Apache Spark Launcher

import org.apache.spark.launcher.SparkLauncher;
import org.apache.spark.launcher.SparkAppHandle;

import org.apache.spark.launcher.SparkAppHandle;
import org.apache.spark.launcher.SparkLauncher;

public class MyLauncher {
    public static void main(String[] args) throws Exception {
        // Launch with monitoring handle
        SparkAppHandle handle = new SparkLauncher()
            .setAppResource("/my/app.jar")
            .setMainClass("my.spark.app.Main")
            .setMaster("local")
            .setConf(SparkLauncher.DRIVER_MEMORY, "2g")
            .startApplication();
        
        // Monitor application state
        System.out.println("Application State: " + handle.getState());
        System.out.println("Application ID: " + handle.getAppId());
    }
}

/**
 * Launcher for Spark applications using builder pattern
 */
public class SparkLauncher {
    // Configuration constants
    public static final String SPARK_MASTER = "spark.master";
    public static final String DRIVER_MEMORY = "spark.driver.memory";
    public static final String DRIVER_EXTRA_CLASSPATH = "spark.driver.extraClassPath";
    public static final String DRIVER_EXTRA_JAVA_OPTIONS = "spark.driver.extraJavaOptions";
    public static final String DRIVER_EXTRA_LIBRARY_PATH = "spark.driver.extraLibraryPath";
    public static final String EXECUTOR_MEMORY = "spark.executor.memory";
    public static final String EXECUTOR_EXTRA_CLASSPATH = "spark.executor.extraClassPath";
    public static final String EXECUTOR_EXTRA_JAVA_OPTIONS = "spark.executor.extraJavaOptions";
    public static final String EXECUTOR_EXTRA_LIBRARY_PATH = "spark.executor.extraLibraryPath";
    public static final String EXECUTOR_CORES = "spark.executor.cores";
    public static final String CHILD_PROCESS_LOGGER_NAME = "spark.launcher.childProcLoggerName";
    public static final String CHILD_CONNECTION_TIMEOUT = "spark.launcher.childConectionTimeout";

    // Static configuration
    public static void setConfig(String name, String value);

    // Constructors
    public SparkLauncher();
    public SparkLauncher(Map<String, String> env);

    // Environment configuration
    public SparkLauncher setJavaHome(String javaHome);
    public SparkLauncher setSparkHome(String sparkHome);
    public SparkLauncher setPropertiesFile(String path);

    // Application configuration
    public SparkLauncher setConf(String key, String value);
    public SparkLauncher setAppName(String appName);
    public SparkLauncher setMaster(String master);
    public SparkLauncher setDeployMode(String mode);
    public SparkLauncher setAppResource(String resource);
    public SparkLauncher setMainClass(String mainClass);

    // Arguments and options
    public SparkLauncher addSparkArg(String arg);
    public SparkLauncher addSparkArg(String name, String value);
    public SparkLauncher addAppArgs(String... args);
    public SparkLauncher setVerbose(boolean verbose);

    // Resource files
    public SparkLauncher addJar(String jar);
    public SparkLauncher addFile(String file);
    public SparkLauncher addPyFile(String file);

    // Launch methods
    public Process launch() throws IOException;
    public SparkAppHandle startApplication(SparkAppHandle.Listener... listeners) throws IOException;
}

// Basic configuration and launch
SparkLauncher launcher = new SparkLauncher()
    .setAppResource("/path/to/my-app.jar")
    .setMainClass("com.example.MySparkApp")
    .setMaster("yarn")
    .setDeployMode("cluster")
    .setConf(SparkLauncher.DRIVER_MEMORY, "4g")
    .setConf(SparkLauncher.EXECUTOR_MEMORY, "2g")
    .setConf(SparkLauncher.EXECUTOR_CORES, "2");

// Launch with monitoring
SparkAppHandle handle = launcher.startApplication();

// Launch as raw process
Process process = launcher.launch();

/**
 * Handle to a running Spark application providing monitoring and control
 */
public interface SparkAppHandle {
    // State monitoring
    void addListener(Listener l);
    State getState();
    String getAppId();

    // Application control
    void stop();
    void kill();
    void disconnect();

    /**
     * Application state enumeration
     */
    public enum State {
        UNKNOWN(false),      // Application has not reported back yet
        CONNECTED(false),    // Application has connected to the handle
        SUBMITTED(false),    // Application has been submitted to the cluster
        RUNNING(false),      // Application is running
        FINISHED(true),      // Application finished with successful status
        FAILED(true),        // Application finished with failed status
        KILLED(true);        // Application was killed

        public boolean isFinal();
    }

    /**
     * Listener interface for handle state and information changes
     */
    public interface Listener {
        void stateChanged(SparkAppHandle handle);
        void infoChanged(SparkAppHandle handle);
    }
}

// Application monitoring with listeners
SparkAppHandle handle = new SparkLauncher()
    .setAppResource("/my/app.jar")
    .setMainClass("my.spark.app.Main")
    .startApplication(new SparkAppHandle.Listener() {
        @Override
        public void stateChanged(SparkAppHandle handle) {
            System.out.println("State changed to: " + handle.getState());
            if (handle.getState().isFinal()) {
                System.out.println("Application finished");
            }
        }

        @Override
        public void infoChanged(SparkAppHandle handle) {
            System.out.println("App ID: " + handle.getAppId());
        }
    });

// Application control - graceful stop
handle.stop();

// Application control - force kill
handle.kill();

// Disconnect without stopping
handle.disconnect();

try {
    SparkAppHandle handle = new SparkLauncher()
        .setAppResource("/my/app.jar")
        .setMainClass("my.spark.app.Main")
        .setMaster("local")
        .startApplication();
} catch (IOException e) {
    System.err.println("Failed to start Spark application: " + e.getMessage());
}