Python grpc._channel() Examples
The following are 6
code examples of grpc._channel().
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Example #1
| Source File: grpcio.py From python-sensor with MIT License | 6 votes |
|
def collect_tags(span, instance, argv, kwargs):
try:
span.set_tag('rpc.flavor', 'grpc')
if type(instance) in SUPPORTED_TYPES:
method = instance._method.decode()
target = instance._channel.target().decode()
elif type(argv[0]) is grpc._cython.cygrpc.RequestCallEvent:
method = argv[0].call_details.method.decode()
target = argv[0].call_details.host.decode()
elif len(argv) > 2:
method = argv[2][2][1]._method.decode()
target = argv[2][2][1]._channel.target().decode()
span.set_tag('rpc.call', method)
parts = target.split(':')
if len(parts) == 2:
span.set_tag('rpc.host', parts[0])
span.set_tag('rpc.port', parts[1])
except:
logger.debug("grpc.collect_tags non-fatal error", exc_info=True)
finally:
return span
Example #2
| Source File: grpc_client.py From xos with Apache License 2.0 | 5 votes |
|
def connectivity_callback(self, client, connectivity):
if (self.was_connected) and (connectivity in [connectivity.TRANSIENT_FAILURE, connectivity.SHUTDOWN]):
log.info("connectivity lost -- restarting")
os.execv(sys.executable, ['python'] + sys.argv)
if (connectivity == connectivity.READY):
self.was_connected = True
# Sometimes gRPC transitions from READY to IDLE, skipping TRANSIENT_FAILURE even though a socket is
# disconnected. So on idle, force a connectivity check.
if (connectivity == connectivity.IDLE) and (self.was_connected):
connectivity = client.channel._channel.check_connectivity_state(True)
# The result will probably show IDLE, but passing in True has the side effect of reconnecting if the
# connection has been lost, which will trigger the TRANSIENT_FALURE we were looking for.
Example #3
| Source File: grpc_client.py From xos with Apache License 2.0 | 5 votes |
|
def connectivity_callback(self, client, connectivity):
if (self.was_connected) and (connectivity in [connectivity.TRANSIENT_FAILURE, connectivity.SHUTDOWN]):
log.info("connectivity lost -- restarting")
os.execv(sys.executable, ['python'] + sys.argv)
if (connectivity == connectivity.READY):
self.was_connected = True
# Sometimes gRPC transitions from READY to IDLE, skipping TRANSIENT_FAILURE even though a socket is
# disconnected. So on idle, force a connectivity check.
if (connectivity == connectivity.IDLE) and (self.was_connected):
connectivity = client.channel._channel.check_connectivity_state(True)
# The result will probably show IDLE, but passing in True has the side effect of reconnecting if the
# connection has been lost, which will trigger the TRANSIENT_FALURE we were looking for.
Example #4
| Source File: grpc_client.py From xos with Apache License 2.0 | 4 votes |
|
def invoke(self, stub, method_name, request, metadata, retry=1):
"""
Invoke a gRPC call to the remote server and return the response.
:param stub: Reference to the *_pb2 service stub
:param method_name: The method name inside the service stub
:param request: The request protobuf message
:param metadata: [(str, str), (str, str), ...]
:return: The response protobuf message and returned trailing metadata
"""
if not self.connected:
raise ConnectError()
try:
method = getattr(stub(self.channel), method_name)
response, rendezvous = method.with_call(request, metadata=metadata)
returnValue((response, rendezvous.trailing_metadata()))
except grpc._channel._Rendezvous as e:
code = e.code()
if code == grpc.StatusCode.UNAVAILABLE:
e = ConnectError()
if self.connected:
self.connected = False
yield self.connect()
if retry > 0:
response = yield self.invoke(stub, method_name,
request, metadata,
retry=retry - 1)
returnValue(response)
elif code in (
grpc.StatusCode.NOT_FOUND,
grpc.StatusCode.INVALID_ARGUMENT,
grpc.StatusCode.ALREADY_EXISTS,
grpc.StatusCode.UNAUTHENTICATED,
grpc.StatusCode.PERMISSION_DENIED):
pass # don't log error, these occur naturally
else:
log.exception(e)
raise e
Example #5
| Source File: grpc_client.py From xos with Apache License 2.0 | 4 votes |
|
def invoke(self, stub, method_name, request, metadata, retry=1):
"""
Invoke a gRPC call to the remote server and return the response.
:param stub: Reference to the *_pb2 service stub
:param method_name: The method name inside the service stub
:param request: The request protobuf message
:param metadata: [(str, str), (str, str), ...]
:return: The response protobuf message and returned trailing metadata
"""
if not self.connected:
raise ConnectError()
try:
method = getattr(stub(self.channel), method_name)
response, rendezvous = method.with_call(request, metadata=metadata)
returnValue((response, rendezvous.trailing_metadata()))
except grpc._channel._Rendezvous as e:
code = e.code()
if code == grpc.StatusCode.UNAVAILABLE:
e = ConnectError()
if self.connected:
self.connected = False
yield self.connect()
if retry > 0:
response = yield self.invoke(stub, method_name,
request, metadata,
retry=retry - 1)
returnValue(response)
elif code in (
grpc.StatusCode.NOT_FOUND,
grpc.StatusCode.INVALID_ARGUMENT,
grpc.StatusCode.ALREADY_EXISTS,
grpc.StatusCode.UNAUTHENTICATED,
grpc.StatusCode.PERMISSION_DENIED):
pass # don't log error, these occur naturally
else:
log.exception(e)
raise e
Example #6
| Source File: grpc_client.py From voltha with Apache License 2.0 | 4 votes |
|
def invoke(self, stub, method_name, request, metadata, retry=1):
"""
Invoke a gRPC call to the remote server and return the response.
:param stub: Reference to the *_pb2 service stub
:param method_name: The method name inside the service stub
:param request: The request protobuf message
:param metadata: [(str, str), (str, str), ...]
:return: The response protobuf message and returned trailing metadata
"""
if not self.connected:
raise ServiceUnavailable()
try:
method = getattr(stub(self.channel), method_name)
response, rendezvous = method.with_call(request, metadata=metadata)
returnValue((response, rendezvous.trailing_metadata()))
except grpc._channel._Rendezvous, e:
code = e.code()
if code == grpc.StatusCode.UNAVAILABLE:
e = ServiceUnavailable()
if self.connected:
self.connected = False
yield self.connect()
if retry > 0:
response = yield self.invoke(stub, method_name,
request, metadata,
retry=retry - 1)
returnValue(response)
elif code in (
grpc.StatusCode.NOT_FOUND,
grpc.StatusCode.INVALID_ARGUMENT,
grpc.StatusCode.ALREADY_EXISTS):
pass # don't log error, these occur naturally
else:
log.exception(e)
raise e
# Below is an adaptation of Google's MessageToDict() which includes
# protobuf options extensions
