def locate():
"""Use to locate running instance of Chimera.
When started, Manager creates a UDP broadcast server. This
method tries to locate the Manager using a broadcast message
and waiting for an answer.
"""
sk = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sk.setblocking(0)
try:
try:
sk.sendto(MANAGER_BEACON_CHALLENGE, ("", MANAGER_BEACON_PORT))
ins, outs, excs = select.select([sk], [], [sk], 1)
if sk in ins:
data, _ = sk.recvfrom(1024)
if data.strip() != MANAGER_BEACON_ERROR:
host, port = data.split(":")
return Proxy(uri=getManagerURI(host, int(port)))
raise ManagerNotFoundException("Couldn't locate any suitable Manager.")
except socket.error, e:
raise ManagerNotFoundException("Error trying to locate a suitable Manager.")
finally:
sk.close()
def __init__(self, host=None, port=None):
RemoteObject.__init__(self)
log.info("Starting manager.")
self.resources = ResourcesManager()
self.classLoader = ClassLoader()
# identity
self.setGUID(MANAGER_LOCATION)
# shutdown event
self.died = threading.Event()
# our daemon server
self.adapter = ManagerAdapter(self, host, port)
self.adapterThread = threading.Thread(target=self.adapter.requestLoop)
self.adapterThread.setDaemon(True)
self.adapterThread.start()
# register ourselves
self.resources.add(
MANAGER_LOCATION,
self,
getManagerURI(self.getHostname(),
self.getPort()))
def locate(host, port=None):
"""Simple class to easily contact an Manager
"""
p = Proxy(uri=getManagerURI(host, port or MANAGER_DEFAULT_PORT))
if not p.ping():
raise ManagerNotFoundException("Couldn't find manager running on %s:%d" % (host, port))
return p
def locate(host, port=None):
"""Simple class to easily contact an Manager
"""
p = Proxy(uri=getManagerURI(host, port or MANAGER_DEFAULT_PORT))
if not p.ping():
raise ManagerNotFoundException(
"Couldn't find manager running on %s:%d" % (host, port))
return p
def __init__(self, host=None, port=None, local=False):
RemoteObject.__init__(self)
log.info("Starting manager.")
self.resources = ResourcesManager()
self.classLoader = ClassLoader()
# identity
self.setGUID(MANAGER_LOCATION)
# shutdown event
self.died = threading.Event()
if not local:
try:
ManagerLocator.locate()
raise ChimeraException("Chimera is already running"
" on this system. Use chimera-admin"
" to manage it.")
except ManagerNotFoundException:
# ok, we are alone.
pass
# our daemon server
self.adapter = ManagerAdapter(self, host, port)
self.adapterThread = threading.Thread(target=self.adapter.requestLoop)
self.adapterThread.setDaemon(True)
self.adapterThread.start()
# finder beacon
if not local:
self.beacon = ManagerBeacon(self)
self.beaconThread = threading.Thread(target=self.beacon.run)
self.beaconThread.setDaemon(True)
self.beaconThread.start()
else:
self.beacon = None
# register ourself
self.resources.add(MANAGER_LOCATION, self,
getManagerURI(self.getHostname(), self.getPort()))
# signals
signal.signal(signal.SIGTERM, self._sighandler)
signal.signal(signal.SIGINT, self._sighandler)
atexit.register(self._sighandler)
def __init__(self, host=None, port=None):
RemoteObject.__init__(self)
log.info("Starting manager.")
self.resources = ResourcesManager()
self.classLoader = ClassLoader()
# identity
self.setGUID(MANAGER_LOCATION)
# shutdown event
self.died = threading.Event()
# our daemon server
self.adapter = ManagerAdapter(self, host, port)
self.adapterThread = threading.Thread(target=self.adapter.requestLoop)
self.adapterThread.setDaemon(True)
self.adapterThread.start()
# register ourself
self.resources.add(MANAGER_LOCATION, self,
getManagerURI(self.getHostname(), self.getPort()))
