pyarrow.flight.ClientMiddlewareFactory¶
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class
pyarrow.flight.ClientMiddlewareFactory¶ Bases:
pyarrow.lib._WeakrefableA 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.
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__init__()¶ Initialize self. See help(type(self)) for accurate signature.
Methods
__init__()Initialize self.
start_call(self, info)Called at the start of an RPC.
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start_call(self, info)¶ Called at the start of an RPC.
This must be thread-safe and must not raise exceptions.
- Parameters
info (CallInfo) – Information about the call.
- Returns
instance (ClientMiddleware) – An instance of ClientMiddleware (the instance to use for the call), or None if this call is not intercepted.
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