2021-03-27 Spark任务提交方式之SparkLaunch

最近面试被问到提交任务到集群运行的方式，一下子没想起来我们项目中用的是SparkLaunch来提交的，而这一块是直接从别的项目中拿过来的，自己没有研究过着一块（果然偷懒还是不行的o(╥﹏╥)o），今天还是来补一下。
对于SparkLaunch官网是这么描述的:
“Use this class to start Spark applications programmatically. The class uses a builder pattern to allow clients to configure the Spark application and launch it as a child process.“，
意思就是SparkLaunch这个类是用于客户端配置Spark应用程序并将其作为子进程启动。
而我们的项目中使用到的就是这种形式。

    SparkAppHandle handler = new SparkLauncher().setAppName("CHECK_RUN_" + taskRunId)
                .setAppResource("aml-shade-1.0.0.jar").setMainClass("com.check.CheckExecute")
                .setMaster("yarn").setDeployMode("cluster")
                .addFile(jdbcProperty)
                .startApplication(new SparkAppHandle.Listener() {
                    @Override
                    public void stateChanged(SparkAppHandle handle) {
                        // TODO state changed 状态变化时处理
                        System.out.println("********** state changed **********");
                        
                    }

                    @Override
                    public void infoChanged(SparkAppHandle handle) {
                        // TODO info changed
                        System.out.println("********** info changed **********");
                        
                    }
                }

像Spark-Submit一样，这里也可以设置一些参数：有一些参数是必须设置的，比如：setAppResource、setAppResource、setMaster、setDeployMode..
具体可以查看官网的介绍SparkLaunch参数详情

启动之后 会监听Spark进程的状态，状态信息保存在enum State

enum State {
    /** The application has not reported back yet. */
    UNKNOWN(false),
    /** The application has connected to the handle. */
    CONNECTED(false),
    /** The application has been submitted to the cluster. */
    SUBMITTED(false),
    /** The application is running. */
    RUNNING(false),
    /** The application finished with a successful status. */
    FINISHED(true),
    /** The application finished with a failed status. */
    FAILED(true),
    /** The application was killed. */
    KILLED(true),
    /** The Spark Submit JVM exited with a unknown status. */
    LOST(true);