in src/main/java/org/apache/sling/jobs/impl/JobManagerImpl.java [106:110]
public Job start(Job j) {
j.setState(Job.JobState.QUEUED);
messageSender.update(j.newJobUpdateBuilder().command(JobUpdate.JobUpdateCommand.START_JOB).putAll(j.getProperties()).build());
return jobStorage.put(j);
}