/**
* Start this task based on given top-level fork-join task representing job computation.
*
* @param fjtask top-level job computation task.
* @return this job in {@link JobState#RUNNING} state
* @see JobState
* @see H2OCountedCompleter
*/
public
/** FIXME: should be final or at least protected */
Job start(final H2OCountedCompleter fjtask) {
assert state == JobState.CREATED : "Trying to run job which was already run?";
assert fjtask != null : "Starting a job with null working task is not permitted! Fix you API";
_fjtask = fjtask;
start_time = System.currentTimeMillis();
state = JobState.RUNNING;
// Save the full state of the job
UKV.put(self(), this);
// Update job list
new TAtomic<List>() {
@Override
public List atomic(List old) {
if (old == null) old = new List();
Key[] jobs = old._jobs;
old._jobs = Arrays.copyOf(jobs, jobs.length + 1);
old._jobs[jobs.length] = job_key;
return old;
}
}.invoke(LIST);
return this;
}
/**
* Returns job execution time in milliseconds. If job is not running then returns job execution
* time.
*/
public final long runTimeMs() {
long until = end_time != 0 ? end_time : System.currentTimeMillis();
return until - start_time;
}
/** Marks job as finished and records job end time. */
public void remove() {
end_time = System.currentTimeMillis();
if (state == JobState.RUNNING) state = JobState.DONE;
// Overwrite handle - copy end_time, state, msg
replaceByJobHandle();
}