pyarrow.flight.FlightServerBase#

class pyarrow.flight.FlightServerBase(location=None, auth_handler=None, tls_certificates=None, verify_client=None, root_certificates=None, middleware=None)#

Bases: pyarrow.lib._Weakrefable

A Flight service definition.

To start the server, create an instance of this class with an appropriate location. The server will be running as soon as the instance is created; it is not required to call serve().

Override methods to define your Flight service.

Parameters

locationstr, tuple or Location optional, default None: Location to serve on. Either a gRPC URI like grpc://localhost:port, a tuple of (host, port) pair, or a Location instance. If None is passed then the server will be started on localhost with a system provided random port.
auth_handlerServerAuthHandler optional, default None: An authentication mechanism to use. May be None.
tls_certificateslist optional, default None: A list of (certificate, key) pairs.
verify_clientbool optional, default False: If True, then enable mutual TLS: require the client to present a client certificate, and validate the certificate.
root_certificatesbytes optional, default None: If enabling mutual TLS, this specifies the PEM-encoded root certificate used to validate client certificates.
middlewarelist optional, default None: A dictionary of ServerMiddlewareFactory items. The keys are used to retrieve the middleware instance during calls (see ServerCallContext.get_middleware()).

__init__(*args, **kwargs)#

Methods

`__init__`(args, *kwargs)
`do_action`(self, context, action)	Execute a custom action.
`do_exchange`(self, context, descriptor, ...)	Write data to a flight.
`do_get`(self, context, ticket)	Write data to a flight.
`do_put`(self, context, descriptor, ...)	Write data to a flight.
`get_flight_info`(self, context, descriptor)	Get information about a flight.
`get_schema`(self, context, descriptor)	Get the schema of a flight.
`list_actions`(self, context)	List custom actions available on this server.
`list_flights`(self, context, criteria)	List flights available on this service.
`run`(self)	Block until the server shuts down.
`serve`(self)	Block until the server shuts down.
`shutdown`(self)	Shut down the server, blocking until current requests finish.
`wait`(self)	Block until server is terminated with shutdown.

Attributes

port

Get the port that this server is listening on.

do_action(self, context, action)#

Execute a custom action.

This method should return an iterator, or it should be a generator. Applications should override this method to implement their own behavior. The default method raises a NotImplementedError.

Parameters

contextServerCallContext: Common contextual information.
actionAction: The action to execute.

Returns

iterator of bytes

do_exchange(self, context, descriptor, reader, writer)#

Write data to a flight.

Applications should override this method to implement their own behavior. The default method raises a NotImplementedError.

Parameters

contextServerCallContext: Common contextual information.
descriptorFlightDescriptor: The descriptor for the flight provided by the client.
readerMetadataRecordBatchReader: A reader for data uploaded by the client.
writerMetadataRecordBatchWriter: A writer to send responses to the client.

do_get(self, context, ticket)#

Write data to a flight.

Applications should override this method to implement their own behavior. The default method raises a NotImplementedError.

Parameters

contextServerCallContext: Common contextual information.
ticketTicket: The ticket for the flight.

Returns

FlightDataStream: A stream of data to send back to the client.

do_put(self, context, descriptor, MetadataRecordBatchReader reader: MetadataRecordBatchReader, FlightMetadataWriter writer: FlightMetadataWriter)#

Write data to a flight.

Applications should override this method to implement their own behavior. The default method raises a NotImplementedError.

Parameters

contextServerCallContext: Common contextual information.
descriptorFlightDescriptor: The descriptor for the flight provided by the client.
readerMetadataRecordBatchReader: A reader for data uploaded by the client.
writerFlightMetadataWriter: A writer to send responses to the client.

get_flight_info(self, context, descriptor)#

Get information about a flight.

Applications should override this method to implement their own behavior. The default method raises a NotImplementedError.

Parameters

contextServerCallContext: Common contextual information.
descriptorFlightDescriptor: The descriptor for the flight provided by the client.

Returns

FlightInfo

get_schema(self, context, descriptor)#

Get the schema of a flight.

Applications should override this method to implement their own behavior. The default method raises a NotImplementedError.

Parameters

contextServerCallContext: Common contextual information.
descriptorFlightDescriptor: The descriptor for the flight provided by the client.

Returns

Schema

list_actions(self, context)#

List custom actions available on this server.

Applications should override this method to implement their own behavior. The default method raises a NotImplementedError.

Parameters

contextServerCallContext: Common contextual information.

Returns

iterator of ActionType or tuple

list_flights(self, context, criteria)#

List flights available on this service.

Applications should override this method to implement their own behavior. The default method raises a NotImplementedError.

Parameters

contextServerCallContext: Common contextual information.
criteriabytes: Filter criteria provided by the client.

Returns

iterator of FlightInfo

port#

Get the port that this server is listening on.

Returns a non-positive value if the operation is invalid (e.g. init() was not called or server is listening on a domain socket).

run(self)#: Block until the server shuts down.

Deprecated since version 0.15.0: Use the FlightServer.serve method instead

serve(self)#

Block until the server shuts down.

This method only returns if shutdown() is called or a signal a received.

shutdown(self)#

Shut down the server, blocking until current requests finish.

Do not call this directly from the implementation of a Flight method, as then the server will block forever waiting for that request to finish. Instead, call this method from a background thread.

wait(self)#: Block until server is terminated with shutdown.

pyarrow.flight.FlightMetadataWriter

pyarrow.flight.GeneratorStream