VAK

Real-Time Phoenix: only the first 3 responses are displayed on the console (p.101)

Here is a scenario of cyclic sending messages and receiving responses via slowStatsChannel.
The transport accepts all 5 responses, but only the first 3 responses that meet the 10s interval are displayed on the console, as seen in DevTools.
My understanding is that a packet transaction has a lifetime, after which the packets are accepted but are not passed to the processing script. This is a tricky disconcerting point for those who are new to real-time network programming.

1 comment

/book-real-time-phoenix #suggestion

0 445 1

2023-01-05 15:06:11 UTC

First Post!

sb8244

Author of From Ruby to Elixir and Real-Time Phoenix

Just to clarify, do you mean this lifetime is implemented in Phoenix JS lib, or somewhere else?

The packets transmitted over the channel’s WebSocket are not delayed at all. It’s the request/response lifecycle that’s delayed inside of the Channel’s logic (via Process.sleep). So, when a message is sent, it’s going to be sent as fast as possible from client → server and server → client.

WebSocket itself does not have the concept of request/response lifecycle, so that’s all implemented by Phoenix’s libraries.

Post #2

Where Next?

View thread on forum

View Real Time Phoenix's book portal

Post errata for this book

Post a suggestion for this book

Post a question about this book

Post a review about this book

Home PragProg Customers

/book-real-time-phoenix #suggestion

0 445 1

Last post

Popular Pragmatic Bookshelf topics

PragProg Customers

Python Testing with pytest - Chapter 5 example c AttributeError: 'module' object has no attribute 'config'

Running the examples in chapter 5 c under pytest 5.4.1 causes an AttributeError: ‘module’ object has no attribute ‘config’. In particula...

#errata /book-python-testing-with-pytest

5 3582 1

2020-07-14 20:43:55 UTC

New

PragProg Customers

Web Development with Clojure, Third Edition: Issue adding Shadow CLJS

Title: Web Development with Clojure, Third Edition, pg 116 Hi - I just started chapter 5 and I am stuck on page 116 while trying to star...

#question /book-web-development-with-clojure-third-edition

4 1199 4

2021-01-10 05:30:17 UTC

New

PragProg Customers

Modern CSS with Tailwind: can’t setup the Rails source code

I can’t setup the Rails source code. This happens in a working directory containing multiple (postgres) Rails apps. With: ruby-3.0.0 s...

#question /book-modern-css-with-tailwind

0 1280 3

2021-03-27 15:29:34 UTC

New

PragProg Customers

Python Testing with pytest, Second Edition: cards pip install error (page 12)

#book-python-testing-with-pytest-second-edition Hi. Thanks for writing the book. I am just learning so this might just of been an issue ...

#errata /book-python-testing-with-pytest-second-edition

4 1191 3

2021-07-03 13:40:39 UTC

New

PragProg Customers

Modern Front-End Development for Rails: ERROR in tsconfig.json Chapter_01/01

@noelrappin Running the webpack dev server, I receive the following warning: ERROR in tsconfig.json TS18003: No inputs were found in c...

/book-modern-front-end-development-for-rails

3 1438 3

2021-09-02 19:11:59 UTC

New

PragProg Customers

Build a Weather Station with Elixir and Nerves: 'mix deps.get' does not work if user has not created a keyfile (page 16)

Running mix deps.get in the sensor_hub directory fails with the following error: ** (Mix) No SSH public keys found in ~/.ssh. An ssh aut...

#errata /book-build-a-weather-station-with-elixir-and-nerves

2 1457 3

2024-12-18 18:02:25 UTC

New

PragProg Customers

Programming Phoenix LiveView: live_modal/2 instead of live_component/3 (210)

“The ProductLive.Index template calls a helper function, live_component/3, that in turn calls on the modal component. ” Excerpt From: Br...

#errata /book-programming-phoenix-liveview

3 1042 6

2021-11-03 12:30:33 UTC

New

PragProg Customers

Hands-on Rust: Failed to Load Texture error (page 121)

Hi, I completed chapter 6 but am getting the following error when running: thread 'main' panicked at 'Failed to load texture: IoError(O...

/book-hands-on-rust

2 1310 3

2022-01-23 22:36:50 UTC

New

PragProg Customers

Agile Web Development with Rails 7: page 152, page 153:

AWDWR 7, page 152, page 153: Hello everyone, I’m a little bit lost on the hotwire part. I didn’t fully understand it. On page 152 @rub...

#question /book-agile-web-development-with-rails-7

0 1230 4

2023-01-16 15:26:22 UTC

New

PragProg Customers

Programming Machine Learning: Setting up your system (p 13)

From page 13: On Python 3.7, you can install the libraries with pip by running these commands inside a Python venv using Visual Studio ...

#question /book-programming-machine-learning

1 989 3

2023-10-09 07:44:15 UTC

New

Other popular topics

General Dev>Learning Resources

Seven More Languages in Seven Weeks

Learn from the award-winning programming series that inspired the Elixir language, and go on a step-by-step journey through the most impo...

pragprog.com

#pragprog /elixir /julia /lua #published-book #factor /elm #minikanren /idris /book-seven-more-languages-in-seven-weeks

4 5862 0

2020-04-29 21:59:54 UTC

New

Linux>Questions

AMD or Intel for Programming with Linux as the OS?

I am thinking in building or buy a desktop computer for programing, both professionally and on my free time, and my choice of OS is Linux...

#mobile #android #web-development #linux #desktop-computer #mobile-development

36 6006 10

2020-07-12 20:50:05 UTC

New

General Dev>Hardware

Poll: Which keyboard layout do you use?

poll poll Be sure to check out @Dusty’s article posted here: An Introduction to Alternative Keyboard Layouts It’s one of the best write-...

colemakmods.github.io

#polls /keyboards

10 6048 11

2020-10-31 23:12:33 UTC

New

General Dev>Hardware

Custom keyboard keycaps

There’s a whole world of custom keycaps out there that I didn’t know existed! Check out all of our Keycaps threads here: https://forum....

#hardware /keyboards #keycaps #mechanical-keyboards

15 11086 19

2023-07-27 16:30:57 UTC

New

General Dev>Hardware

BIIP MT3 Extended 2048 Custom Keycap Set (Drop)

This looks like a stunning keycap set :orange_heart: A LEGENDARY KEYBOARD LIVES ON When you bought an Apple Macintosh computer in the e...

/keyboards #apple #keycaps #mechanical-keyboards

14 6713 7

2020-12-12 19:58:26 UTC

New

Frontend>Learning Resources

Modern CSS with Tailwind

Tailwind CSS is an exciting new CSS framework that allows you to design your site by composing simple utility classes to create complex e...

pragprog.com

#pragprog /tailwind #published-book /book-modern-css-with-tailwind

12 5813 4

2021-05-13 14:50:23 UTC

New

Backend>Learning Resources

Programming Phoenix LiveView

Build highly interactive applications without ever leaving Elixir, the way the experts do. Let LiveView take care of performance, scalabi...

pragprog.com

#pragprog /elixir /phoenix #published-book /book-programming-phoenix-liveview

79 9178 24

2025-12-03 17:10:22 UTC

New

General Dev>Dev Chat

Roc Language - a new purely functional programming language built for speed and ergonomics

Hi folks, I don’t know if I saw this here but, here’s a new programming language, called Roc Reminds me a bit of Elm and thus Haskell. ...

#programminguages #functional-programming

49 5164 14

2021-11-10 20:03:09 UTC

New

General Dev>Dev Chat

Warp—The blazingly fast, Rust-based terminal

A few weeks ago I started using Warp a terminal written in rust. Though in it’s current state of development there are a few caveats (tab...

/rust #terminal

52 6785 22

2025-02-26 17:47:24 UTC

New

Backend>Questions

Psql: error: connection to server on socket "/tmp/.s.PGSQL.5432" failed: No such file or directory

If you’re getting errors like this: psql: error: connection to server on socket “/tmp/.s.PGSQL.5432” failed: No such file or directory ...

#macos /rails /postgresql

1 5553 1

2024-10-17 02:03:48 UTC

New

Real-Time Phoenix: only the first 3 responses are displayed on the console (p.101)

VAK

Real-Time Phoenix: only the first 3 responses are displayed on the console (p.101)