flask-celery
libuv
flask-celery | libuv | |
---|---|---|
7 | 75 | |
201 | 23,241 | |
- | 0.6% | |
10.0 | 9.0 | |
over 10 years ago | 7 days ago | |
Python | C | |
BSD 3-clause "New" or "Revised" License | MIT License |
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flask-celery
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Node.js vs. Python: How to choose the best technology to develop your backend
Celery
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Test if a celery task is still being processed
How can I test if a task (task_id) is still processed in celery? I have the following scenario:
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how to serialize binary files to use with a celery task
I recently integrated celery (django-celery to be more specific) in one of my applications. I have a model in the application as follows.
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Django - post_init signal is called on Model instance save & before instance is even created. Why?
I am trying to write a small application that receives video files, and convert them to a uniform format after they have been uploaded (thus added to the database). I have searched the web for the best solution for this, and have decided to use Django's signals with Celery. But for now I'm trying to create a proof-of-concept to see if it works.
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Is there a problem with the celery page?
Since a few days ago the page no longer loads.
https://celeryproject.org/
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Detect whether Celery is Available/Running
I'm using Celery to manage asynchronous tasks. Occasionally, however, the celery process goes down which causes none of the tasks to get executed. I would like to be able to check the status of celery and make sure everything is working fine, and if I detect any problems display an error message to the user. From the Celery Worker documentation it looks like I might be able to use ping or inspect for this, but ping feels hacky and it's not clear exactly how inspect is meant to be used (if inspect().registered() is empty?).
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How to use Flask-SQLAlchemy in a Celery task
I recently switch to Celery 3.0. Before that I was using Flask-Celery in order to integrate Celery with Flask. Although it had many issues like hiding some powerful Celery functionalities but it allowed me to use the full context of Flask app and especially Flask-SQLAlchemy.
libuv
- Epoll: The API that powers the modern internet (2022)
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APIs in Go with Huma 2.0
I wound up on a different team with pre-existing Python code so temporarily shelved my use of Go for a bit, and we used Sanic (an async Python framework built on top of the excellent uvloop & libuv that also powers Node.js) to build some APIs for live channel management & operations. We hand-wrote our OpenAPI and used it to generate documentation and a CLI, which was an improvement over what was there (or not) before. Other teams used the OpenAPI document to generate SDKs to interact with our service.
- Python Is Easy. Go Is Simple. Simple = Easy
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Notes: Advanced Node.js Concepts by Stephen Grider
In the source code of the Node.js opensource project, lib folder contains JavaScript code, mostly wrappers over C++ and function definitions. On the contrary, src folder contains C++ implementations of the functions, which pulls dependencies from the V8 project, the libuv project, the zlib project, the llhttp project, and many more - which are all placed at the deps folder.
- A Magia do Event Loop
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A complete guide to the Node.js event loop
Libuv, the C library that gives Node.js its asynchronous, non-blocking I/O capability is responsible for managing the thread pool. Node.js gives you the capability of using additional threads for computationally expensive and long-lasting operations to avoid blocking the event loop.
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What is Node.js?: A Complete Guide
Node.js is written in C, C++, and JavaScript. The core components of Node.js - the V8 engine and the libuv library - are written in C++ and C, respectively, since these languages provide low-level access to system resources, making them well-suited for building high-performance and efficient applications. JavaScript is mainly used to write the application logic.
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Node v20.3.0 (Current) upgrade to libuv 1.45.0, including SIGNIFICANT performance improvements to file system operations on Linux
x8 apparently https://github.com/libuv/libuv/pull/3952
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Node.js – v20.3.0
Notably upgrades to libuv 1.45 which has io_uring support. Faster file system access! Awhh yeah, it's on.
Remarkable what a mild & unintrusive PR adding io_uring was. https://github.com/libuv/libuv/pull/3952
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Using Parallel Processing in Node.js and its Limitations
Well, the single-threaded nature ultimately leads to its biggest downfall. Node.js utilizes a synchronous event loop engineered using Libuv that takes in code from the call stack and executes it.
What are some alternatives?
Nest - A progressive Node.js framework for building efficient, scalable, and enterprise-grade server-side applications with TypeScript/JavaScript 🚀
libevent - Event notification library
fastapi - FastAPI framework, high performance, easy to learn, fast to code, ready for production
Boost.Asio - Asio C++ Library
axios - Promise based HTTP client for the browser and node.js
libev - Full-featured high-performance event loop loosely modelled after libevent
Django - The Web framework for perfectionists with deadlines.
tokio-uring - An io_uring backed runtime for Rust
awesome-nodejs - :zap: Delightful Node.js packages and resources
uvw - Header-only, event based, tiny and easy to use libuv wrapper in modern C++ - now available as also shared/static library!
nan - Native Abstractions for Node.js
C++ Actor Framework - An Open Source Implementation of the Actor Model in C++