Examples of org.apache.twill.api.TwillPreparer

org.apache.twill.api.TwillPreparer
This interface exposes methods to set up the Twill runtime environment and start a Twill application.

        }
        LOG.warn("Done stopping extra instances of {}", serviceName);
      }
    } else {
      LOG.info("Starting {} application", serviceName);
      TwillPreparer twillPreparer = getPreparer();
      twillController = twillPreparer.start();


      twillController.addListener(new ServiceListenerAdapter() {
        @Override
        public void failed(Service.State from, Throwable failure) {
          LOG.error("{} failed with exception... restarting with back-off.", serviceName, failure);

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    // Twill would also ignore it if it is not running in secure mode.
    // The HDFS token should already obtained by Twill.
    return launch(copiedProgram, options, hConfFile, cConfFile, new ApplicationLauncher() {
      @Override
      public TwillController launch(TwillApplication twillApplication) {
        TwillPreparer twillPreparer = twillRunner
          .prepare(twillApplication);
        if (options.isDebug()) {
          LOG.info("Starting {} with debugging enabled.", program.getId());
          twillPreparer.enableDebugging();
        }


        List<URI> containerResources = addLogbackConfig(Lists.<URI>newArrayList());


        TwillController twillController = twillPreparer
          .withDependencies(new HBaseTableUtilFactory().get().getClass())
          //TODO: Fix Logging in Distributed Mode.
          //.addLogHandler(new PrinterLogHandler(new PrintWriter(System.out, true)))
          .addSecureStore(YarnSecureStore.create(HBaseTokenUtils.obtainToken(hConf, new Credentials())))
          .withResources(containerResources)

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        }
        LOG.warn("Stopped extra instances of {}", serviceName);
      }
    } else {
      LOG.info("Starting {} application", serviceName);
      TwillPreparer twillPreparer = getPreparer();
      twillController = twillPreparer.start();


      twillController.addListener(new ServiceListenerAdapter() {


        @Override
        public void running() {

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    return preparer;
  }


  private TwillPreparer getPreparer() {
    TwillPreparer preparer = twillRunnerService.prepare(twillApplication)
      .addLogHandler(new PrinterLogHandler(new PrintWriter(System.out)));


    // Add system logback file to the preparer
    URL logbackUrl = getClass().getResource("/logback.xml");
    if (logbackUrl == null) {
      LOG.warn("Cannot find logback.xml to pass onto Twill Runnables!");
    } else {
      try {
        preparer.withResources(logbackUrl.toURI());
      } catch (URISyntaxException e) {
        LOG.error("Got exception while getting URI for logback.xml - {}", logbackUrl);
      }
    }
    preparer = prepareExploreContainer(preparer);

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    // Twill would also ignore it if it is not running in secure mode.
    // The HDFS token should already obtained by Twill.
    return launch(copiedProgram, options, hConfFile, cConfFile, new ApplicationLauncher() {
      @Override
      public TwillController launch(TwillApplication twillApplication) {
        TwillPreparer twillPreparer = twillRunner
          .prepare(twillApplication);
        if (options.isDebug()) {
          LOG.info("Starting {} with debugging enabled.", program.getId());
          twillPreparer.enableDebugging();
        }
        TwillController twillController = twillPreparer
          .withDependencies(new HBaseTableUtilFactory().get().getClass())
          .addLogHandler(new PrinterLogHandler(new PrintWriter(System.out)))
          .addSecureStore(YarnSecureStore.create(HBaseTokenUtils.obtainToken(hConf, new Credentials())))
          .withApplicationArguments(
            String.format("--%s", RunnableOptions.JAR), copiedProgram.getJarLocation().getName(),

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co.cask.cdap.common.twill.TwillRunnerMain

co.cask.cdap.data.runtime.main.MasterServiceMain

co.cask.cdap.internal.app.runtime.distributed.AbstractDistributedProgramRunner

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