StreamingPullRequest(mapping=None, *, ignore_unknown_fields=False, **kwargs)Request for the StreamingPull streaming RPC method. This request
is used to establish the initial stream as well as to stream
acknowledgements and ack deadline modifications from the client to
the server.
Attributes |
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|---|---|
| Name | Description |
subscription
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str
Required. The subscription for which to initialize the new stream. This must be provided in the first request on the stream, and must not be set in subsequent requests from client to server. Format is projects/{project}/subscriptions/{sub}.
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ack_ids
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MutableSequence[str]
Optional. List of acknowledgement IDs for acknowledging previously received messages (received on this stream or a different stream). If an ack ID has expired, the corresponding message may be redelivered later. Acknowledging a message more than once will not result in an error. If the acknowledgement ID is malformed, the stream will be aborted with status INVALID_ARGUMENT.
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modify_deadline_seconds
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MutableSequence[int]
Optional. The list of new ack deadlines for the IDs listed in modify_deadline_ack_ids. The size of this list must
be the same as the size of modify_deadline_ack_ids. If
it differs the stream will be aborted with
INVALID_ARGUMENT. Each element in this list is applied
to the element in the same position in
modify_deadline_ack_ids. The new ack deadline is with
respect to the time this request was sent to the Pub/Sub
system. Must be >= 0. For example, if the value is 10, the
new ack deadline will expire 10 seconds after this request
is received. If the value is 0, the message is immediately
made available for another streaming or non-streaming pull
request. If the value is < 0="" (an="" error),="" the="" stream="" will="" be="" aborted="" with="" status="">INVALID_ARGUMENT.
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modify_deadline_ack_ids
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MutableSequence[str]
Optional. List of acknowledgement IDs whose deadline will be modified based on the corresponding element in modify_deadline_seconds. This field can be used to
indicate that more time is needed to process a message by
the subscriber, or to make the message available for
redelivery if the processing was interrupted.
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stream_ack_deadline_seconds
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int
Required. The ack deadline to use for the stream. This must be provided in the first request on the stream, but it can also be updated on subsequent requests from client to server. The minimum deadline you can specify is 10 seconds. The maximum deadline you can specify is 600 seconds (10 minutes). |
client_id
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str
Optional. A unique identifier that is used to distinguish client instances from each other. Only needs to be provided on the initial request. When a stream disconnects and reconnects for the same stream, the client_id should be set to the same value so that state associated with the old stream can be transferred to the new stream. The same client_id should not be used for different client instances. |
max_outstanding_messages
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int
Optional. Flow control settings for the maximum number of outstanding messages. When there are max_outstanding_messages currently sent to the streaming
pull client that have not yet been acked or nacked, the
server stops sending more messages. The sending of messages
resumes once the number of outstanding messages is less than
this value. If the value is <= 0,="" there="" is="" no="" limit="" to="" the="" number="" of="" outstanding="" messages.="" this="" property="" can="" only="" be="" set="" on="" the="" initial="" streamingpullrequest.="" if="" it="" is="" set="" on="" a="" subsequent="" request,="" the="" stream="" will="" be="" aborted="" with="" status="">INVALID_ARGUMENT.
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max_outstanding_bytes
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int
Optional. Flow control settings for the maximum number of outstanding bytes. When there are max_outstanding_bytes
or more worth of messages currently sent to the streaming
pull client that have not yet been acked or nacked, the
server will stop sending more messages. The sending of
messages resumes once the number of outstanding bytes is
less than this value. If the value is <= 0,="" there="" is="" no="" limit="" to="" the="" number="" of="" outstanding="" bytes.="" this="" property="" can="" only="" be="" set="" on="" the="" initial="" streamingpullrequest.="" if="" it="" is="" set="" on="" a="" subsequent="" request,="" the="" stream="" will="" be="" aborted="" with="" status="">INVALID_ARGUMENT.
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