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Streaming & messaging

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

3 matches

How to Build a Materialized View Updater Consumer Mock in Python

A mock consumer that queues change events and triggers refresh callbacks to simulate materialized view updates.

import time
from collections import deque
from dataclasses import dataclass, field
from typing import Callable, Deque, Optional


@dataclass
class MaterializedViewUpdater:
    """Mock updater that consumes change events and refreshes a view."""
    refresh: Optional[Callable[[str], None]] = None
    queue: Deque[tuple…

14 0 Open

Streaming & messaging easy

How to Mock RabbitMQ Ack Nack Requeue in Python

A mock RabbitMQ channel and consumer that simulates ack, nack, and requeue handling for testing message processing logic without a broker.

rabbitmq testing mock

Python

import json
from collections import deque


class MockChannel:
    def __init__(self):
        self.acked = []
        self.nacked = []
        self.requeued = []

    def basic_ack(self, delivery_tag):
        self.acked.append(delivery_tag)

    def basic_nack(self, delivery_tag, requeue=False):
        self.nacked.…

15 0 Open

Streaming & messaging easy

How to mock RabbitMQ queue binding with routing keys in Python

A mock demonstration of binding a queue to an exchange with multiple routing keys in RabbitMQ using Python and pika, without a real broker connection.

rabbitmq messaging pika

Python

import pika
import sys


def bind_queue_with_routing(channel, queue_name, exchange_name, routing_keys):
    """
    Mock RabbitMQ queue binding with routing keys.
    Prints the binding configuration instead of connecting to a real broker.
    """
    for routing_key in routing_keys:
        binding = {
            "q…

14 0 Open

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