pyarrow.flight.ClientMiddlewareFactory#

class pyarrow.flight.ClientMiddlewareFactory#

Bases: _Weakrefable

A factory for new middleware instances.

All middleware methods will be called from the same thread as the RPC method implementation. That is, thread-locals set in the client are accessible from the middleware itself.

__init__(*args, **kwargs)#

Methods

__init__(*args,**kwargs)
start_call(self,info)	Called at the start of an RPC.

start_call(self, info)#

Called at the start of an RPC.

This must be thread-safe and must not raise exceptions.

Parameters:

infoCallInfo

Information about the call.

Returns:

instanceClientMiddleware

An instance of ClientMiddleware (the instance to use for the call), or None if this call is not intercepted.