def __init__(self, job, job_name, server_level, downstream_job=None):
if server_level == 0:
assert downstream_job is None
else:
assert downstream_job is not None
self.job = job
self.downstream_job = downstream_job
self.master = None
self.server_level = server_level
Server.num_servers.setdefault(job_name, 0)
Server.num_servers[job_name] += 1
self.server_id = '%s:%d' % (job_name, Server.num_servers[job_name])
self.state = ServerStateWrapper(self)
# Kick off the pseudo-thread to do discovery and get resource
# capacity.
scheduler.add_thread(self, 0)
