Otter is framework for creating microservices in Flask like fassion using RPC communication via message queue.

Related tags

Web Frameworks otter
Overview

Otter

Framework for microservices.

PyPI version PyPI license Maintenance

Overview

Otter is framework for creating microservices in Flask like fassion using RPC communication via message queue. Its built in top of kiwiPy library.

Application

Simple Otter application looks liks this.

from otter import Otter
import hashlib
import time

app = Otter()

@app.add_broadcast(["message.*"])
def example_broadcast(comm, body, sender, subject, correlation_id):
    print(f"Received {body}")

@app.add_task("example.task")
def example_task(comm, delay):
    time.sleep(delay)
    print(f"Done waiting {delay} seconds")

@app.add_rpc("example.hash")
def example_hash(comm, data):
    return {
        "result": hashlib.sha256(
            data.encode("utf-8")
        ).hexdigest()
    }

app.run("amqp://guest:[email protected]/", debug=True)

Client

You can communicate with Otter application using Client.

from otter import Client

client = Client("amqp://guest:[email protected]/")

if client.comm:
    # Broadcast message to anyone who listens
    client.broadcast("otter", subject="message.send")

    # Send task to remote worker
    client.task("example.task", 5)

    # Send rpc request to hash "otter" and wait for the result
    data = client.rpc("example.hash", "otter").result()

client.close()

Blueprints

You can use Flask like blueprints in order to organize and split your application into different modules.

from otter import Blueprint

blueprint = Blueprint()

@blueprint.add_rpc("hello.world")
def example_hash(comm, data):
    return {"result": "Hello world from blueprint!"}

After that blueprint can be initialized using register_blueprint method.

app.register_blueprint(blueprint)

Decorators

In most cases you will use JSON to communicate between your microservices, thats why Otter has built in decorator @use_args which uses Marshmallow for data validation.

from marshmallow import fields, validate
from otter.decorators import use_args

login_args = {
    "password": fields.Str(required=True, validate=validate.Length(min=8)),
    "email": fields.Email(required=True)
}

@app.add_rpc("auth.login")
@use_args(login_args)
def login(comm, data):
    return {"args": data}

Foreword

This is experimental software, any contributions are welcome!

You might also like...
Swagger/OpenAPI First framework for Python on top of Flask with automatic endpoint validation & OAuth2 support

Connexion Connexion is a framework that automagically handles HTTP requests based on OpenAPI Specification (formerly known as Swagger Spec) of your AP

Fully featured framework for fast, easy and documented API development with Flask

Flask RestPlus IMPORTANT NOTICE: This project has been forked to Flask-RESTX and will be maintained by by the python-restx organization. Flask-RESTPlu

Swagger/OpenAPI First framework for Python on top of Flask with automatic endpoint validation & OAuth2 support

Connexion Connexion is a framework that automagically handles HTTP requests based on OpenAPI Specification (formerly known as Swagger Spec) of your AP

Fully featured framework for fast, easy and documented API development with Flask

Flask RestPlus IMPORTANT NOTICE: This project has been forked to Flask-RESTX and will be maintained by by the python-restx organization. Flask-RESTPlu

APIFlask is a lightweight Python web API framework based on Flask and marshmallow-code projects
APIFlask is a lightweight Python web API framework based on Flask and marshmallow-code projects

APIFlask APIFlask is a lightweight Python web API framework based on Flask and marshmallow-code projects. It's easy to use, highly customizable, ORM/O

You can use the mvc pattern in your flask application using this extension.
You can use the mvc pattern in your flask application using this extension.

You can use the mvc pattern in your flask application using this extension. Installation Run the follow command to install mvc_flask: $ pip install mv

A simple todo app using flask and sqlachemy
A simple todo app using flask and sqlachemy

TODO app This is a simple TODO app made using Flask. Packages used: DoodleCSS Special thanks to Chris McCormick (@mccrmx) :) Flask Flask-SQLAlchemy Fl

Asita is a web application framework for python based on express-js framework.

Asita is a web application framework for python. It is designed to be easy to use and be more easy for javascript users to use python frameworks because it is based on express-js framework.

Flask + Docker + Nginx + Gunicorn + MySQL + Factory Method Pattern

This Flask project is reusable and also an example of how to merge Flask, Docker, Nginx, Gunicorn, MySQL, new: Flask-RESTX, Factory Method design pattern, and other optional dependencies such as Dynaconf, Marshmallow, SQLAlchemy, Faker, PyMySQL, Pytest, etc... which are installed inside the virtual environment "env_flask".

Owner
Volodymyr Biloshytskyi
Blockchain Developer | Freelancer | Lazy Ass ∠( ᐛ 」∠)
Volodymyr Biloshytskyi
A comprehensive reference for all topics related to building and maintaining microservices

This pandect (πανδέκτης is Ancient Greek for encyclopedia) was created to help you find and understand almost anything related to Microservices that i

Ivan Bilan 64 Dec 9, 2022
Online Boutique is a cloud-native microservices demo application

Online Boutique is a cloud-native microservices demo application. Online Boutique consists of a 10-tier microservices application. The application is

Matt Reider 1 Oct 22, 2021
Flask-Potion is a RESTful API framework for Flask and SQLAlchemy, Peewee or MongoEngine

Flask-Potion Description Flask-Potion is a powerful Flask extension for building RESTful JSON APIs. Potion features include validation, model resource

DTU Biosustain 491 Dec 8, 2022
Flask-Potion is a RESTful API framework for Flask and SQLAlchemy, Peewee or MongoEngine

Flask-Potion Description Flask-Potion is a powerful Flask extension for building RESTful JSON APIs. Potion features include validation, model resource

DTU Biosustain 484 Feb 3, 2021
Flask Sugar is a web framework for building APIs with Flask, Pydantic and Python 3.6+ type hints.

Flask Sugar is a web framework for building APIs with Flask, Pydantic and Python 3.6+ type hints. check parameters and generate API documents automatically. Flask Sugar是一个基于flask,pyddantic,类型注解的API框架, 可以检查参数并自动生成API文档

null 162 Dec 26, 2022
NO LONGER MAINTAINED - A Flask extension for creating simple ReSTful JSON APIs from SQLAlchemy models.

NO LONGER MAINTAINED This repository is no longer maintained due to lack of time. You might check out the fork https://github.com/mrevutskyi/flask-res

null 1k Jan 4, 2023
NO LONGER MAINTAINED - A Flask extension for creating simple ReSTful JSON APIs from SQLAlchemy models.

NO LONGER MAINTAINED This repository is no longer maintained due to lack of time. You might check out the fork https://github.com/mrevutskyi/flask-res

null 1k Jan 15, 2021
A public API written in Python using the Flask web framework to determine the direction of a road sign using AI

python-public-API This repository is a public API for solving the problem of the final of the AIIJC competition. The task is to create an AI for the c

Lev 1 Nov 8, 2021
Chisel is a light-weight Python WSGI application framework built for creating well-documented, schema-validated JSON web APIs

chisel Chisel is a light-weight Python WSGI application framework built for creating well-documented, schema-validated JSON web APIs. Here are its fea

Craig Hobbs 2 Dec 2, 2021
Daniel Vaz Gaspar 4k Jan 8, 2023