Examples with JavaSparkMain co.cask.cdap.api.spark.JavaSparkMain used on opensource projects

Example 1 with JavaSparkMain

use of co.cask.cdap.api.spark.JavaSparkMain in project cdap by caskdata.

the class JavaSparkMainWrapper method run.

@Override
public void run(JavaSparkExecutionContext sec) throws Exception {
    String stageName = sec.getSpecification().getProperty(ExternalSparkProgram.STAGE_NAME);
    BatchPhaseSpec batchPhaseSpec = GSON.fromJson(sec.getSpecification().getProperty(Constants.PIPELINEID), BatchPhaseSpec.class);
    PipelinePluginContext pluginContext = new SparkPipelinePluginContext(sec.getPluginContext(), sec.getMetrics(), batchPhaseSpec.isStageLoggingEnabled(), batchPhaseSpec.isProcessTimingEnabled());
    Class<?> mainClass = pluginContext.loadPluginClass(stageName);
    // if it's a CDAP JavaSparkMain, instantiate it and call the run method
    if (JavaSparkMain.class.isAssignableFrom(mainClass)) {
        MacroEvaluator macroEvaluator = new DefaultMacroEvaluator(new BasicArguments(sec), sec.getLogicalStartTime(), sec.getSecureStore(), sec.getNamespace());
        JavaSparkMain javaSparkMain = pluginContext.newPluginInstance(stageName, macroEvaluator);
        javaSparkMain.run(sec);
    } else {
        // otherwise, assume there is a 'main' method and call it
        String programArgs = getProgramArgs(sec, stageName);
        String[] args = programArgs == null ? RuntimeArguments.toPosixArray(sec.getRuntimeArguments()) : programArgs.split(" ");
        final Method mainMethod = mainClass.getMethod("main", String[].class);
        final Object[] methodArgs = new Object[1];
        methodArgs[0] = args;
        Caller caller = pluginContext.getCaller(stageName);
        caller.call(new Callable<Void>() {

            @Override
            public Void call() throws Exception {
                mainMethod.invoke(null, methodArgs);
                return null;
            }
        });
    }
}