Class FlowControl (2.18.0)

Version 2.18.0

• 2.27.1 (latest)
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FlowControl(
    max_bytes: int = 104857600,
    max_messages: int = 1000,
    max_lease_duration: float = 3600,
    min_duration_per_lease_extension: float = 0,
    max_duration_per_lease_extension: float = 0,
)

The settings for controlling the rate at which messages are pulled with an asynchronous subscription.

Attributes
Name	Description
max_bytes	int The maximum total size of received - but not yet processed - messages before pausing the message stream. Defaults to 100 MiB.
max_messages	int The maximum number of received - but not yet processed - messages before pausing the message stream. Defaults to 1000.
max_lease_duration	float The maximum amount of time in seconds to hold a lease on a message before dropping it from the lease management. Defaults to 1 hour.
min_duration_per_lease_extension	float The min amount of time in seconds for a single lease extension attempt. Must be between 10 and 600 (inclusive). Ignored by default, but set to 60 seconds if the subscription has exactly-once delivery enabled.
max_duration_per_lease_extension	float The max amount of time in seconds for a single lease extension attempt. Bounds the delay before a message redelivery if the subscriber fails to extend the deadline. Must be between 10 and 600 (inclusive). Ignored if set to 0.

Methods

FlowControl

FlowControl(
    max_bytes: int = 104857600,
    max_messages: int = 1000,
    max_lease_duration: float = 3600,
    min_duration_per_lease_extension: float = 0,
    max_duration_per_lease_extension: float = 0,
)

Create new instance of FlowControl(max_bytes, max_messages, max_lease_duration, min_duration_per_lease_extension, max_duration_per_lease_extension)