MongoDB Wire Protocol for asyncio

This is a MongoDB Wire Protocol client implementation for Python asyncio.

How is it different from Motor

Motor is a full-featured MongoDB client for asyncio. Aiomongowire is not trying to become a high-level client, it does not implement common command like find() or updateOne(), it is a pure minimal protocol client which can be used as a building block to create a higher level client.

Motor uses asyncio.run_in_executor to make the synchronous code work with asyncio. Aiomongowire is based on asyncio.Protocol, which is an asyncio-native to communicate over network.

Motor is based on Pymongo, and brings it as a dependency, which makes it much larger and monolithic. Aiomongowire tries to avoid the scope creep, and is kept separate from BSON parsers, higher level logic, and syntactic sugar.

Install

To get the current dev release, use test PyPi:

pip install -i https://test.pypi.org/simple/ aiomongowire

Usage

Aiomongowire is made to be used as a building block inside a bigger MongoDB client, but it can be used separately if you want to remove as many intermediate layer as you can between your code and the DB.

import asyncio
from aiomongowire import OpQuery, OpInsert, MongoWireMessage, MongoWireProtocol

db_name = "test"
collection_name = "test"
value = 123

# Connect
loop = asyncio.get_event_loop()
transport, protocol = await loop.create_connection(lambda: MongoWireProtocol(), '127.0.0.1', 27017)

# Insert data
operation = OpInsert(full_collection_name=f"{db_name}.{collection_name}", 
                     documents=[{'a': value}])
data = MongoWireMessage(operation=operation)
await protocol.send_data(data)

# Query data
operation = OpQuery(full_collection_name=f"{db_name}.{collection_name}",
                    query={'a': value})
data = MongoWireMessage(operation=operation)
result: MongoWireMessage = await protocol.send_data(data)

# Disconnect
transport.close()