def __init__(self, slave_infos=swarm_settings.SLAVE_INFOS): self.slave_infos = slave_infos self.heartbeat_client = HeartbeatClient() self.status_listener = SwarmMaster.SwarmStatusListener(self) self.master_httpd = MasterHTTPD(self)
class SwarmMaster:
"""The class which manages all of the master's roles: heartbeat generator, status listener, and httpd"""
def __init__(self, slave_infos=swarm_settings.SLAVE_INFOS):
self.slave_infos = slave_infos
self.heartbeat_client = HeartbeatClient()
self.status_listener = SwarmMaster.SwarmStatusListener(self)
self.master_httpd = MasterHTTPD(self)
class SwarmStatusListener(StatusListener):
def __init__(self, swarm_master):
self.swarm_master = swarm_master
StatusListener.__init__(self)
def handle_status(self, status):
"""
CHANGE ME: This is where you'd implement your application's reaction
to any tests you've defined.
"""
print 'The SwarmStatusListener received status: %s' % status
def start(self):
self.heartbeat_client.start()
self.status_listener.start()
self.master_httpd.start()
def stop(self):
self.heartbeat_client.stop()
self.status_listener.stop()
self.master_httpd.stop()
def receive_message(self, slave_id, action, message):
"""
CHANGE ME: This is where you'd implement your application specific functions.
You could triggering a change in the master hardware or use self.send_message(...)
to trigger actions by the slaves.
"""
print 'Master received %s: "%s" from slave %s' % (action, message, slave_id)
def send_message(self, slave_host, action, message):
"""Send a message to a host"""
params = urllib.urlencode({swarm_settings.ACTION_PARAMETER_NAME:action, swarm_settings.MESSAGE_PARAMETER_NAME:message})
headers = {"Content-type": "application/x-www-form-urlencoded", "Accept": "text/plain"}
try:
conn = httplib.HTTPConnection('%s:%s' % (slave_host, swarm_settings.SLAVE_WEB_PORT))
conn.request("POST", "/master/message/", params, headers)
response = conn.getresponse()
response.read()
conn.close()
return True
except:
return False
def narrowcast_message(self, slave_id, action, message):
"""Send a message to a single slave"""
for slave_info in self.slave_infos:
if slave_info[0] == slave_id:
return self.send_message(slave_info[1], action, message)
return false
def broadcast_message(self, action, message):
"""Send a message to all of the slaves"""
for slave_info in self.slave_infos:
if not self.send_message(slave_info[1], action, message):
print 'Error'