pyarrow.flight.ServerMiddlewareFactory¶
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class
pyarrow.flight.ServerMiddlewareFactory¶ 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 middleware are accessible from the method itself.
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__init__()¶ Initialize self. See help(type(self)) for accurate signature.
Methods
__init__()Initialize self.
start_call(self, info, headers)Called at the start of an RPC.
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start_call(self, info, headers)¶ Called at the start of an RPC.
This must be thread-safe.
- Parameters
info (CallInfo) – Information about the call.
headers (dict) – A dictionary of headers from the client. Keys are strings and values are lists of strings (for text headers) or bytes (for binary headers).
- Returns
instance (ServerMiddleware) – An instance of ServerMiddleware (the instance to use for the call), or None if this call is not intercepted.
:raises exception : pyarrow.ArrowException: If an exception is raised, the call will be rejected with the given error.
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