def signal(self, controller, request, done):
"""
Perform an RPC call to signal all clients registered to receive a
specific signal.
:param controller: used to mediate a single method call
:type controller: protobuf.socketrpc.controller.SocketRpcController
:param request: the request received from the client
:type request: leap.common.events.events_pb2.SignalRequest
:param done: callback to be called when done
:type done: protobuf.socketrpc.server.Callback
"""
logger.info('Received signal from client: %s...', str(request)[:40])
# send signal to all registered clients
# TODO: verify signal auth
if request.event in registered_clients:
for port in registered_clients[request.event]:
def callback(req, resp):
logger.info("Signal received by " + str(port))
service = RpcService(proto.EventsClientService_Stub,
port, 'localhost')
service.signal(request, callback=callback)
# send response back to client
response = proto.EventResponse()
response.status = proto.EventResponse.OK
done.run(response)
def signal(self, controller, request, done):
"""
Perform an RPC call to signal all components registered to receive a
specific signal.
@param controller: used to mediate a single method call
@type controller: protobuf.socketrpc.controller.SocketRpcController
@param request: the request received from the component
@type request: leap.common.events.events_pb2.SignalRequest
@param done: callback to be called when done
@type done: protobuf.socketrpc.server.Callback
"""
logger.info('Received signal from component: %s', str(request))
# send signal to all registered components
# TODO: verify signal auth
if request.event in registered_components:
for port in registered_components[request.event]:
def callback(req, resp):
logger.info("Signal received by " + str(port))
service = RpcService(proto.EventsComponentService_Stub, port,
'localhost')
service.signal(request, callback=callback)
# send response back to component
response = proto.EventResponse()
response.status = proto.EventResponse.OK
done.run(response)
def test_signal_response_status(self):
"""
Ensure there's an appropriate response from server when signaling.
"""
sig = 4
request = SignalRequest()
request.event = sig
request.content = 'my signal contents'
request.mac_method = mac_auth.MacMethod.MAC_NONE
request.mac = ""
service = RpcService(EventsServerService_Stub, port, 'localhost')
# test synch
response = service.signal(request, timeout=1000)
self.assertEqual(EventResponse.OK, response.status,
'Wrong response status.')
# test asynch
def local_callback(request, response):
global local_callback_executed
local_callback_executed = True
events.register(sig, local_callback)
service.signal(request, callback=local_callback)
time.sleep(0.1)
self.assertTrue(local_callback_executed,
'Local callback did not execute.')
def test_RpcService(self):
client = RpcService(proto.SimpleService_Stub, self.service_port,
"localhost")
test_msg = proto.Simple()
test_msg.val = 1
response = client.TestRpc(test_msg, timeout=5000)
self.assertEqual(response.val, test_msg.val + 1,
"Rpc test failed")
class StorageService(object):
def __init__(self, host, port):
self.service = RpcService(StorageService_Stub, port, host)
def storeSensorData(self, sensordata, callback):
try:
self.service.storeSensorData(sensordata, callback=callback)
except Exception, ex:
log.exception(ex)
def fill_hole_flash(self, token):
"""Creates a hole at the token by sending a FillHole request."""
_, host, port, offset = self.projection.translate(token)
request_f = flash_service_pb2.FillHoleRequest()
request_f.offset = offset
# TODO: initialize RpcService in init
service_f = RpcService(flash_service_pb2.FlashService_Stub, port, host)
service_f.FillHole(request_f, callback=self.callback)
def test_server_replies_ping(self):
"""
Ensure server replies to a ping.
"""
request = PingRequest()
service = RpcService(EventsServerService_Stub, port, 'localhost')
response = service.ping(request, timeout=1000)
self.assertIsNotNone(response)
self.assertEqual(EventResponse.OK, response.status,
'Wrong response status.')
def test_client_replies_ping(self):
"""
Ensure clients reply to a ping.
"""
daemon = client.ensure_client_daemon()
port = daemon.get_port()
request = PingRequest()
service = RpcService(EventsClientService_Stub, port, 'localhost')
response = service.ping(request, timeout=1000)
self.assertEqual(EventResponse.OK, response.status,
'Wrong response status.')
def __init__(self, config=global_config):
self.projection = projection.Projection(config)
self.service = RpcService(sequencer_service_pb2.SequencerService_Stub,
config.SEQUENCER_PORT, config.SEQUENCER_HOST)
self.client_id = str(uuid4())
# guessing information
self.largest_token = -1
self.largest_timestamp = 0.0
self.last_state = INITIAL
self.last_server = -1
self.latest_ips = 0.0
self.delay = 0.0
self.config = config
def test_signal_response_status(self):
"""
Ensure there's an appropriate response from server when signaling.
"""
sig = 4
request = SignalRequest()
request.event = sig
request.content = 'my signal contents'
request.mac_method = mac_auth.MacMethod.MAC_NONE
request.mac = ""
service = RpcService(EventsServerService_Stub, port, 'localhost')
# test synch
response = service.signal(request, timeout=1000)
self.assertEqual(EventResponse.OK, response.status,
'Wrong response status.')
def __init__(self):
# Server details
hostname = "localhost"
port = 8090
# Create a new service instance
self.service = RpcService(server_pb2.CommandService_Stub, port, hostname)
class ControllerProtobuf:
def __init__(self):
# Server details
hostname = "localhost"
port = 8090
# Create a new service instance
self.service = RpcService(server_pb2.CommandService_Stub, port, hostname)
##########################################################################
################################ CLIENT ##################################
##########################################################################
def is_connected(self):
print("Try connection")
request = server_pb2.IsConnectedRequest()
# Make an synchronous call
response = None
try:
response = self.service.is_connected(request, timeout=10000) is not None
if response:
print("Connection sucessful")
except Exception, ex:
log.exception(ex)
return response
def _start_flash_server(cls, server_index):
host, port = config.SERVER_ADDR_LIST[server_index]
server_thread = test.helper.ServerThread(
port, host,
flash_service.FlashServiceImpl.from_index(server_index, config))
server_thread.start_server()
return RpcService(flash_service_pb2.FlashService_Stub, port, host)
def setUpClass(cls):
# start server thread
cls.server_thread = test.helper.ServerThread(
FLASH_SERVER_PORT, FLASH_SERVER_HOST,
flash_service.FlashServiceImpl.from_index(0, config))
cls.server_thread.start_server()
cls.service = RpcService(flash_service_pb2.FlashService_Stub,
FLASH_SERVER_PORT, FLASH_SERVER_HOST)
cls._reset_flash_server()
def test_client_receives_signal(self):
"""
Ensure clients can receive signals.
"""
sig = 7
flag = Mock()
events.register(sig, lambda req: flag(req.event))
request = SignalRequest()
request.event = sig
request.content = ""
request.mac_method = mac_auth.MacMethod.MAC_NONE
request.mac = ""
service = RpcService(EventsServerService_Stub, port, 'localhost')
response = service.signal(request, timeout=1000)
self.assertTrue(response is not None, 'Did not receive response.')
time.sleep(0.5)
flag.assert_called_once_with(sig)
def test_events_server_service_register(self):
"""
Ensure the server can register clients to be signaled.
"""
sig = 5
request = RegisterRequest()
request.event = sig
request.port = 8091
request.mac_method = mac_auth.MacMethod.MAC_NONE
request.mac = ""
service = RpcService(EventsServerService_Stub, port, 'localhost')
complist = server.registered_clients
self.assertEqual({}, complist,
'There should be no registered_ports when '
'server has just been created.')
response = service.register(request, timeout=1000)
self.assertTrue(sig in complist, "Signal not registered succesfully.")
self.assertTrue(8091 in complist[sig],
'Failed registering client port.')
def signal(signal,
content="",
mac_method="",
mac="",
reqcbk=None,
timeout=1000):
"""
Send `signal` event to events server.
Will timeout after timeout ms if response has not been received. The
timeout arg is only used for asynch requests. If a reqcbk callback has
been supplied the timeout arg is not used. The response value will be
returned for a synch request but nothing will be returned for an asynch
request.
:param signal: the signal that causes the callback to be launched
:type signal: int (see the `events.proto` file)
:param content: the contents of the event signal
:type content: str
:param mac_method: the method used for auth mac
:type mac_method: str
:param mac: the content of the auth mac
:type mac: str
:param reqcbk: a callback to be called when a response from server is
received
:type reqcbk: function
callback(leap.common.events.events_pb2.EventResponse)
:param timeout: the timeout for synch calls
:type timeout: int
:return: the response from server for synch calls or nothing for asynch
calls
:rtype: leap.common.events.events_pb2.EventsResponse or None
"""
request = proto.SignalRequest()
request.event = signal
request.content = content
request.mac_method = mac_method
request.mac = mac
service = RpcService(proto.EventsServerService_Stub, server.SERVER_PORT,
'localhost')
logger.info("Sending signal to server: %s", str(request)[:40])
return service.signal(request, callback=reqcbk, timeout=timeout)
def test_events_server_service_register(self):
"""
Ensure the server can register components to be signaled.
"""
sig = 5
request = RegisterRequest()
request.event = sig
request.port = 8091
request.mac_method = mac_auth.MacMethod.MAC_NONE
request.mac = ""
service = RpcService(EventsServerService_Stub, port, 'localhost')
complist = server.registered_components
self.assertEqual({}, complist,
'There should be no registered_ports when '
'server has just been created.')
response = service.register(request, timeout=1000)
self.assertTrue(sig in complist, "Signal not registered succesfully.")
self.assertTrue(8091 in complist[sig],
'Failed registering component port.')
def __init__(self, *args, **kwargs):
super(Device, self).__init__(*args, **kwargs)
if not hasattr(self, 'device_class'):
return
c = self.device_class
if c.device_type.value in [
control_pb2.APC, control_pb2.PC_WIN, control_pb2.PC_LINUX,
control_pb2.UFO, control_pb2.IPPOWER, control_pb2.IPMI
]:
server = 'localhost'
else:
server = self.server_name
self.service = RpcService(control_pb2.ControlService_Stub, 10021,
server)
d_pb = control_pb2.Device()
d_pb.type = c.device_type.value
d_pb.server = self.server_name
d_pb.port = str(self.argument)
self.pb = control_pb2.Device()
self.pb.CopyFrom(d_pb)
def test_signal_executes_callback(self):
"""
Ensure callback is executed upon receiving signal.
"""
sig = CLIENT_UID
request = SignalRequest()
request.event = sig
request.content = 'my signal contents'
request.mac_method = mac_auth.MacMethod.MAC_NONE
request.mac = ""
service = RpcService(EventsServerService_Stub, port, 'localhost')
# register a callback
flag = Mock()
events.register(sig, lambda req: flag(req.event))
# signal
response = service.signal(request)
self.assertEqual(EventResponse.OK, response.status,
'Wrong response status.')
time.sleep(1) # wait for signal to arrive
flag.assert_called_once_with(sig)
def test_component_receives_signal(self):
"""
Ensure components can receive signals.
"""
sig = 7
def getsig(param=None):
global received
received = True
events.register(sig, getsig)
request = SignalRequest()
request.event = sig
request.content = ""
request.mac_method = mac_auth.MacMethod.MAC_NONE
request.mac = ""
service = RpcService(EventsServerService_Stub, port, 'localhost')
response = service.signal(request, timeout=1000)
self.assertTrue(response is not None, 'Did not receive response.')
time.sleep(0.5)
self.assertTrue(received, 'Did not receive signal back.')
def write_to_flash(self, server, data, data_id):
''' int * string * int -> WriteResponse.Status
Send data and its id to the server, and wait until the response
is back.
Failure Handling:
NONE
Exception Handling:
NONE
'''
# data must be fit in a page right now
(dest_host, dest_port) = self.config.SERVER_ADDR_LIST[server]
service_w = RpcService(flash_service_pb2.FlashService_Stub, dest_port,
dest_host)
request_w = flash_service_pb2.WriteRequest()
request_w.data_id = data_id
request_w.data = data
response_w = service_w.Write(request_w, timeout=10000)
return response_w
def read(self, token):
''' int -> string
Read the data stored in the given token of the shared log.
Failure Handling:
Raise an exception up to the client.
Exception Handling:
NONE
'''
(_, dest_host, dest_port, dest_page) = self.projection.translate(token)
service_r = RpcService(flash_service_pb2.FlashService_Stub, dest_port,
dest_host)
request_r = flash_service_pb2.ReadRequest()
request_r.offset = dest_page
response_r = service_r.Read(request_r, timeout=10000)
if response_r.status == flash_service_pb2.ReadResponse.SUCCESS:
return response_r.data
else:
raise Exception("server read error")
def send_to_flash(self, request, token, is_full=False):
"""If is_full is True, token does not have any meaning,
should be ignored.
"""
(host, port) = self.config.SERVER_ADDR_LIST[request.flash_unit_index]
# TODO: initialize RpcService in init
service_f = RpcService(flash_service_pb2.FlashService_Stub, port, host)
request_f = flash_service_pb2.WriteOffsetRequest()
request_f.data_id = request.data_id
(_, _, _, request_f.offset) = self.projection.translate(token)
request_f.is_full = is_full
request_f.measure.token = token
request_f.measure.request_timestamp = request.request_timestamp
# timestamp is the timestamp for ips
token_timestamp = utils.nanotime()
request_f.measure.token_timestamp = token_timestamp
request_f.measure.ips = self.ips_thread.get_ips()
service_f.WriteOffset(request_f, callback=self.callback)
sequencing_overhead = token_timestamp - request.request_timestamp
self.logger.debug("sequencing overhead for {0}: {1}ns".format(
request.data_id, sequencing_overhead))
def signal(signal, content="", mac_method="", mac="", reqcbk=None,
timeout=1000):
"""
Send `signal` event to events server.
Will timeout after timeout ms if response has not been received. The
timeout arg is only used for asynch requests. If a reqcbk callback has
been supplied the timeout arg is not used. The response value will be
returned for a synch request but nothing will be returned for an asynch
request.
:param signal: the signal that causes the callback to be launched
:type signal: int (see the `events.proto` file)
:param content: the contents of the event signal
:type content: str
:param mac_method: the method used for auth mac
:type mac_method: str
:param mac: the content of the auth mac
:type mac: str
:param reqcbk: a callback to be called when a response from server is
received
:type reqcbk: function(proto.SignalRequest, proto.EventResponse)
:param timeout: the timeout for synch calls
:type timeout: int
:return: the response from server for synch calls or nothing for asynch
calls.
:rtype: leap.common.events.events_pb2.EventsResponse or None
"""
request = proto.SignalRequest()
request.event = signal
request.content = content
request.mac_method = mac_method
request.mac = mac
service = RpcService(proto.EventsServerService_Stub, server.SERVER_PORT,
'localhost')
logger.info("Sending signal to server: %s", str(request)[:40])
return service.signal(request, callback=reqcbk, timeout=timeout)
def ping(port, reqcbk=None, timeout=1000):
"""
Ping a client running in C{port}.
:param port: the port in which the client should be listening
:type port: int
:param reqcbk: a callback to be called when a response from client is
received
:type reqcbk: function(proto.PingRequest, proto.EventResponse)
:param timeout: the timeout for synch calls
:type timeout: int
:return: the response from client for synch calls or nothing for asynch
calls.
:rtype: leap.common.events.events_pb2.EventsResponse or None
"""
request = proto.PingRequest()
service = RpcService(
proto.EventsClientService_Stub,
port,
'localhost')
logger.debug("Pinging a client in port %d..." % port)
return service.ping(request, callback=reqcbk, timeout=timeout)
def ping(port=SERVER_PORT, reqcbk=None, timeout=1000):
"""
Ping the server.
:param port: the port in which server should be listening
:type port: int
:param reqcbk: a callback to be called when a response from server is
received
:type reqcbk: function(proto.PingRequest, proto.EventResponse)
:param timeout: the timeout for synch calls
:type timeout: int
:return: the response from server for synch calls or nothing for asynch
calls.
:rtype: leap.common.events.events_pb2.EventsResponse or None
"""
request = proto.PingRequest()
service = RpcService(
proto.EventsServerService_Stub,
port,
'localhost')
logger.info("Pinging server in port %d..." % port)
return service.ping(request, callback=reqcbk, timeout=timeout)
def main_pb():
logging.basicConfig(level = logging.DEBUG,
format='%(asctime)s %(name)-12s %(levelname)-8s %(message)s')
logging.info("Logging in with team %s and password %s" % (team, password))
service = RpcService(codebots_pb2.CodebotsService_Stub, 12345, "localhost")
res = service.login(codebots_pb2.LoginRequest(team=team, password=password))
session = res.session
logging.info("Initiated session %s" % (session))
try:
while True:
res = service.getStatus(codebots_pb2.StatusRequest(session=session))
print "TURN %d" % (res.turnNum)
status = dict([(tank.id, Tank(team = tank.team, position = (tank.posx, tank.posy))) for tank in res.fieldStatus.tanks])
simulator = Simulator(status)
simulator.print_field()
res = service.waitForSimulation(codebots_pb2.WaitForSimulationRequest(session = session))
print
except KeyboardInterrupt:
logging.info("Shutting down")
finally:
logging.info("Logging out")
res = service.logout(codebots_pb2.LogoutRequest(session = session))
logging.info("Finished!")
def main():
logging.basicConfig(level = logging.DEBUG,
format='%(asctime)s %(name)-12s %(levelname)-8s %(message)s')
team = int(sys.argv[1])
password = sys.argv[2]
logging.info("Logging in with team %s and password %s" % (team, password))
service = RpcService(codebots_pb2.CodebotsService_Stub, 12345, "localhost")
res = service.login(codebots_pb2.LoginRequest(team = team, password = password))
session = res.session
logging.info("Initiated session %s" % (session))
try:
while True:
# Getting the status (a bit stupid, but I need testing)
res = service.getShortStatus(codebots_pb2.ShortStatusRequest(session = session))
turn = res.turnNum
res = service.getStatus(codebots_pb2.StatusRequest(session = session))
fieldStatus = res.fieldStatus
print "TURN %d" % (turn)
# Getting last differential
res = service.getDifferential(codebots_pb2.GetDifferentialRequest(session = session, turn = turn-1))
print Differential.from_protobuf(res)
# Performing a random request
req = codebots_pb2.AddRequestsRequest(session = session, turn = turn)
for tank in fieldStatus.tanks:
tankReq = req.requests.add()
tankReq.id = tank.id
tankReq.move = random.randint(0, 3)
res = service.addRequests(req)
print res
# Waiting for next step
res = service.waitForSimulation(codebots_pb2.WaitForSimulationRequest(session = session))
print
except KeyboardInterrupt:
logging.info("Shutting down")
finally:
logging.info("Logging out")
res = service.logout(codebots_pb2.LogoutRequest(session = session))
logging.info("Finished!")
log = logging.getLogger(__name__)
logging.basicConfig(level=logging.DEBUG)
# Server details
hostname = 'localhost'
port = 8090
# Create a request
request = chunks_pb2.Chunk()
request.id = 'Id del chunk'
request.owner = 'Owner del chunk'
request.chunk = 'El contenido del chunk'
# Create a new service instance
service = RpcService(chunks_pb2.ReplicantSrvr_Stub, port, hostname)
def callback(request, response):
"""Define a simple async callback."""
log.info('Asynchronous response :' + response.__str__())
# Make an asynchronous call
try:
log.info('Making asynchronous call')
response = service.SendChunk(request, callback=callback)
except Exception, ex:
log.exception(ex)
# Make a synchronous call
try:
log.info('Making synchronous call')
May 2009, Nov 2010
'''
# Add main protobuf module to classpath
import sys
sys.path.append('../../main')
import time_pb2 as proto
from protobuf.socketrpc import RpcService
import logging
log = logging.getLogger(__name__)
hostname = 'localhost'
port = 8090
if __name__ == '__main__':
logging.basicConfig(level=logging.DEBUG)
log.debug("test")
# Create request message
request = proto.TimeRequest()
service = RpcService(proto.TimeService_Stub, port, hostname)
try:
response = service.getTime(request, timeout=1000)
log.info(response)
except Exception, ex:
log.exception(ex)
class Device(models.Model):
name = models.CharField(max_length=30)
device_class = models.ForeignKey(DeviceClass)
server_name = models.CharField(max_length=30, blank=True)
argument = models.CharField(max_length=30, blank=True)
depends_on = models.ManyToManyField('Device',
related_name='depends',
symmetrical=False,
blank=True)
location = models.ForeignKey(Location)
hidden = models.BooleanField(default=False)
power_state = models.ForeignKey(State)
def __unicode__(self):
return self.name
def __init__(self, *args, **kwargs):
super(Device, self).__init__(*args, **kwargs)
if not hasattr(self, 'device_class'):
return
c = self.device_class
if c.device_type.value in [
control_pb2.APC, control_pb2.PC_WIN, control_pb2.PC_LINUX,
control_pb2.UFO, control_pb2.IPPOWER, control_pb2.IPMI
]:
server = 'localhost'
else:
server = self.server_name
self.service = RpcService(control_pb2.ControlService_Stub, 10021,
server)
d_pb = control_pb2.Device()
d_pb.type = c.device_type.value
d_pb.server = self.server_name
d_pb.port = str(self.argument)
self.pb = control_pb2.Device()
self.pb.CopyFrom(d_pb)
def send_get(self, feature_type):
request = control_pb2.GetRequest()
request.device.CopyFrom(self.pb)
request.type = feature_type
response = self.service.Get(request, timeout=10000)
if not response.result:
log.error('Invalide answer: ' + response.error)
return response
def send_set(self, feature_type, value):
request = control_pb2.SetRequest()
request.device.CopyFrom(self.pb)
request.type = feature_type
request.value = value
response = self.service.Set(request, timeout=1000)
if not response.result:
log.error('Invalide answer: ' + response.error)
return response
def get_pwr(self):
for d in self.depends_on.all():
response = d.get_pwr()
if response.value != control_pb2.POWER_ON:
return response
return self.send_get(control_pb2.FEAT_PWR)
def send_pwr(self, value):
# no protection for recursive dependencies.
if value == control_pb2.POWER_ON:
# power other device first
for d in self.depends_on.all():
d.send_pwr(value)
response = self.send_set(control_pb2.FEAT_PWR, value)
if response.result:
self.power_state = State.objects.get(value=value)
self.save()
if value == control_pb2.POWER_OFF:
for d in self.depends_on.all():
d.send_pwr(value)
registered_callbacks[signal] = []
cbklist = registered_callbacks[signal]
if uid and filter(lambda (x, y): x == uid, cbklist):
if not replace:
raise CallbackAlreadyRegisteredException()
else:
registered_callbacks[signal] = filter(lambda (x, y): x != uid,
cbklist)
registered_callbacks[signal].append((uid, callback))
# register callback on server
request = proto.RegisterRequest()
request.event = signal
request.port = EventsComponentDaemon.get_instance().get_port()
request.mac_method = mac_auth.MacMethod.MAC_NONE
request.mac = ""
service = RpcService(proto.EventsServerService_Stub, server.SERVER_PORT,
'localhost')
logger.info("Sending registration request to server on port %s: %s",
server.SERVER_PORT,
str(request)[:40])
return service.register(request, callback=reqcbk, timeout=timeout)
def signal(signal,
content="",
mac_method="",
mac="",
reqcbk=None,
timeout=1000):
"""
Send `signal` event to events server.
registered_callbacks[signal] = []
cbklist = registered_callbacks[signal]
if uid and filter(lambda (x, y): x == uid, cbklist):
if not replace:
raise CallbackAlreadyRegisteredException()
else:
registered_callbacks[signal] = filter(lambda(x, y): x != uid,
cbklist)
registered_callbacks[signal].append((uid, callback))
# register callback on server
request = proto.RegisterRequest()
request.event = signal
request.port = EventsClientDaemon.get_instance().get_port()
request.mac_method = mac_auth.MacMethod.MAC_NONE
request.mac = ""
service = RpcService(proto.EventsServerService_Stub,
server.SERVER_PORT, 'localhost')
logger.info(
"Sending registration request to server on port %s: %s",
server.SERVER_PORT,
str(request)[:40])
return service.register(request, callback=reqcbk, timeout=timeout)
def unregister(signal, uid=None, reqcbk=None, timeout=1000):
"""
Unregister a callback.
If C{uid} is specified, unregisters only the callback identified by that
unique id. Otherwise, unregisters all callbacks
:param signal: the signal that causes the callback to be launched
:type signal: int (see the `events.proto` file)
# Configure logging
import logging
log = logging.getLogger(__name__)
logging.basicConfig(level=logging.DEBUG)
# Server details
hostname = 'localhost'
port = 8090
# Create a request
request = hello_world_pb2.HelloRequest()
request.my_name = 'Zach'
# Create a new service instance
service = RpcService(hello_world_pb2.HelloWorldService_Stub, port, hostname)
def callback(request, response):
"""Define a simple async callback."""
log.info('Asynchronous response :' + response.__str__())
# Make an asynchronous call
try:
log.info('Making asynchronous call')
response = service.HelloWorld(request, callback=callback)
except Exception, ex:
log.exception(ex)
# Make a synchronous call
def __init__(self, host, port):
self.service = RpcService(StorageService_Stub, port, host)
May 2009, Nov 2010
'''
# Add main protobuf module to classpath
import sys
sys.path.append('../../main')
import time_pb2 as proto
from protobuf.socketrpc import RpcService
import logging
log = logging.getLogger(__name__)
hostname = 'localhost'
port = 8090
if __name__ == '__main__':
logging.basicConfig(level=logging.DEBUG)
log.debug("test")
# Create request message
request = proto.TimeRequest()
service = RpcService(proto.TimeService_Stub, port, hostname)
try:
response = service.getTime(request, timeout=1000)
log.info(response)
except Exception, ex:
log.exception(ex)
class Client(object):
''' Client handles the write and read requests to the shared log.
It communicates with the sequencer and server using protobuf.
'''
def __init__(self, config=global_config):
self.projection = projection.Projection(config)
self.service = RpcService(sequencer_service_pb2.SequencerService_Stub,
config.SEQUENCER_PORT, config.SEQUENCER_HOST)
self.client_id = str(uuid4())
# guessing information
self.largest_token = -1
self.largest_timestamp = 0.0
self.last_state = INITIAL
self.last_server = -1
self.latest_ips = 0.0
self.delay = 0.0
self.config = config
def append(self, data):
''' string -> (int list * float list)
Checking length of data and for every piece of the data, try
guessing a server to write to and waiting for response. If a
guess fails, retry writing. Every time some feedback helps to
guess better next time. Return the list of tokens storing the
data.
Failure Handling:
Sequencer returns specific token ID when the guessing server
is already full.
Exception Handling:
NONE
'''
data_len = len(data)
if data_len == 0:
return []
number_of_tokens = (data_len - 1) // self.config.FLASH_PAGE_SIZE + 1
token_list = []
# try send every piece of data by guessing
for i in xrange(number_of_tokens):
piece_beg = i * self.config.FLASH_PAGE_SIZE
piece_end = (i + 1) * self.config.FLASH_PAGE_SIZE
if i == number_of_tokens - 1:
piece_end = data_len
piece_data = data[piece_beg:piece_end]
while True:
server_w = self.guess_server()
piece_id = self.client_id
self.send_to_sequencer(server_w, piece_id)
request_timestamp = utils.nanotime()
response_w = self.write_to_flash(server_w, piece_data,
piece_id)
self.update_guess_info(response_w, request_timestamp, server_w)
if response_w.status == flash_service_pb2.WriteResponse.SUCCESS:
token_list.append(response_w.measure.token)
break
return token_list
def update_guess_info(self, response, request_timestamp, server):
''' update information about guessing after the response from flash
'''
ips_measure = response.measure
if response.status == flash_service_pb2.WriteResponse.SUCCESS:
if self.largest_token < ips_measure.token:
self.largest_token = ips_measure.token
self.largest_timestamp = ips_measure.token_timestamp
self.latest_ips = ips_measure.ips
self.delay = ips_measure.request_timestamp - request_timestamp
assert (self.delay >= 0)
self.last_state = SUCCESS
elif response.status == flash_service_pb2.WriteResponse.ERROR_NO_CAPACITY:
self.latest_ips = ips_measure.ips
self.last_server = server
self.last_state = FULL
else:
self.latest_ips = ips_measure.ips
self.last_state = FAIL
def guess_server(self):
''' None -> int
Guess the next server that should be written to.
'''
if self.last_state == INITIAL:
return random.randint(0, self.config.FLASH_PER_GROUP - 1)
elif self.last_state == FULL:
return self.last_server + 1
else:
# SUCCESS or FAIL here
guess_inc = (
utils.nanos_to_sec(self.delay + utils.nanotime() -
self.largest_timestamp) * self.latest_ips +
1 + self.config.CLIENT_GUESS_OVERESTIMATION)
guess_token = int(math.ceil(self.largest_token + guess_inc))
guess_token += random.randint(1, 2)
(guess_server, _, _, _) = self.projection.translate(guess_token)
return guess_server
def send_to_sequencer(self, flash_unit_number, data_id):
''' int * int -> SequencerServiceResponse
Asyncronously send server and data id to the sequencer, ignores
the response.
'''
request_seq = sequencer_service_pb2.SequencerServiceRequest()
request_seq.flash_unit_number = flash_unit_number
request_seq.data_id = data_id
response_seq = self.service.Write(request_seq,
timeout=10000,
callback=Callback())
return response_seq
def write_to_flash(self, server, data, data_id):
''' int * string * int -> WriteResponse.Status
Send data and its id to the server, and wait until the response
is back.
Failure Handling:
NONE
Exception Handling:
NONE
'''
# data must be fit in a page right now
(dest_host, dest_port) = self.config.SERVER_ADDR_LIST[server]
service_w = RpcService(flash_service_pb2.FlashService_Stub, dest_port,
dest_host)
request_w = flash_service_pb2.WriteRequest()
request_w.data_id = data_id
request_w.data = data
response_w = service_w.Write(request_w, timeout=10000)
return response_w
def read(self, token):
''' int -> string
Read the data stored in the given token of the shared log.
Failure Handling:
Raise an exception up to the client.
Exception Handling:
NONE
'''
(_, dest_host, dest_port, dest_page) = self.projection.translate(token)
service_r = RpcService(flash_service_pb2.FlashService_Stub, dest_port,
dest_host)
request_r = flash_service_pb2.ReadRequest()
request_r.offset = dest_page
response_r = service_r.Read(request_r, timeout=10000)
if response_r.status == flash_service_pb2.ReadResponse.SUCCESS:
return response_r.data
else:
raise Exception("server read error")
def reset_guess_info(self):
self.largest_token = -1
self.largest_timestamp = 0.0
self.last_state = INITIAL
self.last_server = -1
self.latest_ips = 0.0
self.delay = 0.0
def trim(self, token):
# we don't need trim in this project
pass
def fill(self, token):
# holes will be filled by servers
pass
request = proto.CommandRequest()
if(args.command == "POWER_OFF"):
command = proto.POWER_OFF
elif(args.command == "POWER_ON"):
command = proto.POWER_ON
else:
raise NameError('Command Not in Dictionary')
request.credentials = socket.gethostbyname(socket.gethostname())
request.command = command
except Exception, ex:
print(ex)
except NameError:
print('Command supplied does not exist in dictionary %s', args.command)
raise
service = RpcService(proto.PoshService_Stub, int(args.port), args.host)
try:
request.IsInitialized()
response = service.getCommandResponse(request, timeout=1000)
if response is None:
raise Exception('service not responding')
print(response)
except Exception, ex:
print(ex)
