How to use

TwillRunnable

in

org.apache.twill.api

@Override
protected void doStop() throws Exception {
 commandExecutor.shutdownNow();
 try {
  runnable.destroy();
 } catch (Throwable t) {
  // Just catch the exception, not propagate it since it's already in shutdown sequence and
  // we want all twill services properly shutdown.
  LOG.warn("Exception when calling runnable.destroy.", t);
 } finally {
  context.stop();
 }
}

 @Override
 public void run() {
  try {
   runnable.handleCommand(message.getCommand());
   result.set(messageId);
  } catch (Exception e) {
   result.setException(e);
  }
 }
});

@Override
protected void doRun() throws Exception {
 runnable.run();
}

@Override
public RuntimeSpecificationAdder add(TwillRunnable runnable, ResourceSpecification resourceSpec) {
 return add(runnable.configure().getName(), runnable, resourceSpec);
}

@Override
protected void triggerShutdown() {
 try {
  runnable.stop();
 } catch (Throwable t) {
  LOG.error("Exception when stopping runnable.", t);
 }
}

@SuppressWarnings("unchecked")
@Override
protected void doStart() throws Exception {
 for (Map.Entry<String, String> entry : containerLiveNodeData.getLogLevels().entrySet()) {
  String loggerName = entry.getKey();
  String oldLogLevel = setLogLevel(loggerName, entry.getValue());
  if (!defaultLogLevels.containsKey(loggerName)) {
   oldLogLevels.put(loggerName, oldLogLevel);
  }
 }
 commandExecutor = Executors.newSingleThreadExecutor(
  Threads.createDaemonThreadFactory("runnable-command-executor"));
 Class<?> runnableClass = classLoader.loadClass(specification.getClassName());
 Preconditions.checkArgument(TwillRunnable.class.isAssignableFrom(runnableClass),
               "Class %s is not instance of TwillRunnable.", specification.getClassName());
 runnable = Instances.newInstance((Class<TwillRunnable>) runnableClass);
 runnable.initialize(context);
}

@Override
public RuntimeSpecificationAdder add(TwillRunnable runnable, ResourceSpecification resourceSpec) {
 return add(runnable.configure().getName(), runnable, resourceSpec);
}

@Override
protected void triggerShutdown() {
 try {
  runnable.stop();
 } catch (Throwable t) {
  LOG.error("Exception when stopping runnable.", t);
 }
}

@SuppressWarnings("unchecked")
@Override
protected void doStart() throws Exception {
 for (Map.Entry<String, String> entry : containerLiveNodeData.getLogLevels().entrySet()) {
  String loggerName = entry.getKey();
  String oldLogLevel = setLogLevel(loggerName, entry.getValue());
  if (!defaultLogLevels.containsKey(loggerName)) {
   oldLogLevels.put(loggerName, oldLogLevel);
  }
 }
 commandExecutor = Executors.newSingleThreadExecutor(
  Threads.createDaemonThreadFactory("runnable-command-executor"));
 Class<?> runnableClass = classLoader.loadClass(specification.getClassName());
 Preconditions.checkArgument(TwillRunnable.class.isAssignableFrom(runnableClass),
               "Class %s is not instance of TwillRunnable.", specification.getClassName());
 runnable = Instances.newInstance((Class<TwillRunnable>) runnableClass);
 runnable.initialize(context);
}

@Override
public RuntimeSpecificationAdder add(String name, TwillRunnable runnable,
                   final ResourceSpecification resourceSpec) {
 final TwillRunnableSpecification spec = new DefaultTwillRunnableSpecification(
                   runnable.getClass().getName(), name, runnable.configure().getConfigs());
 return new RuntimeSpecificationAdder(new LocalFileCompleter() {
  @Override
  public RunnableSetter complete(Collection<LocalFile> files) {
   runnables.put(spec.getName(), new DefaultRuntimeSpecification(spec.getName(), spec, resourceSpec, files));
   return RunnableSetter.this;
  }
 });
}

 @Override
 public void run() {
  try {
   runnable.handleCommand(message.getCommand());
   result.set(messageId);
  } catch (Exception e) {
   result.setException(e);
  }
 }
});

@Override
protected void doRun() throws Exception {
 runnable.run();
}

@Override
protected void doStop() throws Exception {
 commandExecutor.shutdownNow();
 try {
  runnable.destroy();
 } catch (Throwable t) {
  // Just catch the exception, not propagate it since it's already in shutdown sequence and
  // we want all twill services properly shutdown.
  LOG.warn("Exception when calling runnable.destroy.", t);
 } finally {
  context.stop();
 }
}

@Override
public RuntimeSpecificationAdder add(TwillRunnable runnable) {
 return add(runnable.configure().getName(), runnable);
}

@Override
public RuntimeSpecificationAdder add(String name, TwillRunnable runnable,
                   final ResourceSpecification resourceSpec) {
 final TwillRunnableSpecification spec = new DefaultTwillRunnableSpecification(
                   runnable.getClass().getName(), name, runnable.configure().getConfigs());
 return new RuntimeSpecificationAdder(new LocalFileCompleter() {
  @Override
  public RunnableSetter complete(Collection<LocalFile> files) {
   runnables.put(spec.getName(), new DefaultRuntimeSpecification(spec.getName(), spec, resourceSpec, files));
   return RunnableSetter.this;
  }
 });
}

@Override
public RuntimeSpecificationAdder add(TwillRunnable runnable) {
 return add(runnable.configure().getName(), runnable);
}

 @Override
 public TwillSpecification configure() {
  TwillRunnableSpecification runnableSpec = runnable.configure();
  return TwillSpecification.Builder.with()
   .setName(runnableSpec.getName())
   .withRunnable().add(runnableSpec.getName(), runnable, resourceSpec)
   .noLocalFiles()
   .anyOrder()
   .build();
 }
}

 @Override
 public TwillSpecification configure() {
  TwillRunnableSpecification runnableSpec = runnable.configure();
  return TwillSpecification.Builder.with()
   .setName(runnableSpec.getName())
   .withRunnable().add(runnableSpec.getName(), runnable, resourceSpec)
   .noLocalFiles()
   .anyOrder()
   .build();
 }
}

 @Override
 public TwillSpecification configure() {
  TwillRunnableSpecification runnableSpec = runnable.configure();
  return TwillSpecification.Builder.with()
   .setName(runnableSpec.getName())
   .withRunnable().add(runnableSpec.getName(), runnable, resourceSpec)
   .noLocalFiles()
   .anyOrder()
   .build();
 }
}