Spring State Machine task execution not firing - spring

Question

I am having issues with getting a runnable to run in the manner described in the following reference:
http://docs.spring.io/autorepo/docs/spring-statemachine/1.0.0.M3/reference/htmlsingle/#statemachine-examples-tasks
TasksHandler handler = TasksHandler.builder()
.task("1", sleepRunnable())
.task("2", sleepRunnable())
.task("3", sleepRunnable())
.build();
handler.runTasks();
My implementation looks like this:
private Action<States, Events> getUnlockedAction() {
return new Action() {
#Override
public void execute(StateContext sc) {
System.out.println("in action..");
handler = new TasksHandler.Builder().taskExecutor(taskExecutor()).task("1", dp.runProcess(1)).build();
handler.addTasksListener(new MyTasksListener());
handler.runTasks();
System.out.println("after action..");
}
};
}
The initialization for the TaskExecutor looks like this:
#Bean
public TaskExecutor taskExecutor() {
ThreadPoolTaskExecutor te = new ThreadPoolTaskExecutor();
te.setMaxPoolSize(50);
te.setThreadNamePrefix("LULExecutor-");
te.setCorePoolSize(25);
te.initialize();
return te;
}
My code for dp (DataProcessor) looks like this:
#Component
#Qualifier("dataProcessor")
public class ADataProcessor {
public Runnable runProcess(final int i) {
return new Runnable() {
#Async
#Override
public void run() {
long delay = (long) ((Math.random() * 10) + 1) * 1000;
System.out.println("In thread " + i + "... sleep for " + delay);
try {
Thread.sleep(delay);
} catch (InterruptedException ex) {
Logger.getLogger(FSMFactoryConfig.class.getName()).log(Level.SEVERE, null, ex);
}
System.out.println("After thread " + i + "...");
}
};
}
}
When i execute my code, I see the messages for 'in action..' and 'after action..' with no delay..
When I use the following:
taskExecutor().execute(dp.runProcess(1));
taskExecutor().execute(dp.runProcess(2));
taskExecutor().execute(dp.runProcess(3));
taskExecutor().execute(dp.runProcess(4));
taskExecutor().execute(dp.runProcess(5));
taskExecutor().execute(dp.runProcess(6));
I get what I would expect from using the TasksHandler..
state changed to UNLOCKED
In thread 2... sleep for 10000
In thread 3... sleep for 5000
In thread 4... sleep for 8000
In thread 5... sleep for 4000
In thread 6... sleep for 4000
In thread 1... sleep for 9000
Jan 13, 2016 12:32:13 PM - org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor initialize
INFO: Initializing ExecutorService
state changed to LOCKED
After thread 5...
After thread 6...
After thread 3...
After thread 4...
After thread 1...
After thread 2...
None of the messages before or after the delay in the sleep are displayed when using the TasksHandler. So my question, how do I actually execute my runnable?? If I'm doing it correctly, what should I check?

Answer 1

I think you've slightly misunderstood few things. First you're linking to tasks sample having the original idea which were turned into a tasks recipe. It's also worth to look unit tests for tasks.
You register runnables with taskhandler get a state machine from it to start it and then tell handler to run tasks.
I now realize that in docs I probably should be bit more clear of its usage.

Answer 2

After adding all tasks to the handler, I had to start the state machine before invoking runTasks().
handler.getStateMachine().startReactively().block();
handler.runTasks();