Reference library

Streaming & messaging

Kafka-style pub/sub, event consumers, async pipelines, and message-driven workflows.

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Streaming & messaging medium

How to Build a Flow Control Credit Window in Python

A Python class that reserves, confirms, releases, and settles credit to limit message flow and prevent overload in streaming pipelines.

flow-control credit-window streaming
Python 
class CreditWindow:
    def __init__(self, max_credit=1000):
        self.max_credit = max_credit
        self.used_credit = 0
        self.pending_credit = 0
    
    def try_reserve(self, amount):
        available = self.max_credit - self.used_credit - self.pending_credit
        if available >= amount:
           …
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