def threaded_heartbeat():
"""
Fires off a threaded task to check in with feederd via SimpleDB_. There
is a domain that contains all of the running EC2_ instances and their
unique IDs, along with some state data.
The interval at which heartbeats occur is determined by the
:py:data:`NOMMERD_HEARTBEAT_INTERVAL <media_nommer.conf.settings.NOMMERD_HEARTBEAT_INTERVAL`
setting.
"""
if settings.NOMMERD_TERMINATE_WHEN_IDLE:
# thread_count_mod factors out this thread when counting active threads.
is_terminated = NodeStateManager.contemplate_termination(thread_count_mod= -1)
else:
is_terminated = False
if not is_terminated:
NodeStateManager.send_instance_state_update()
