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

Apple Game Frameworks and Technologies: Screen image may be wrong (p 13)

Working through the steps (checking that the Info,plist matches exactly), run the demo game and what appears is grey but does not fill th...

#errata /book-apple-game-frameworks-and-technologies

11 1081 5

2021-05-15 17:31:07 UTC

New

PragProg Customers

Modern Front-End Development for Rails: B7 no main folder in the source code (page xv)

On the page xv there is an instruction to run bin/setup from the main folder. I downloaded the source code today (12/03/21) and can’t see...

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

2 1452 11

2022-03-08 17:27:57 UTC

New

PragProg Customers

Kotlin and Android Development: Could not get unknown property ‘kotlin_version’…

Hi, I have just acquired Michael Fazio’s “Kotlin and Android Development” to learn about game programming for Android. I have a game in p...

/book-kotlin-and-android-development-featuring-jetpack

0 8095 6

2022-08-28 01:56:06 UTC

New

PragProg Customers

Python Testing with pytest, Second Edition: unrecognized arguments error (page 122)

When I run the coverage example to report on missing lines, I get: pytest --cov=cards --report=term-missing ch7 ERROR: usage: pytest [op...

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

0 4000 1

2021-12-03 05:36:38 UTC

New

PragProg Customers

Agile Web Development with Rails 7: Example code does not work delete method (page 78)

On page 78 the following code appears: <%= link_to ‘Destroy’, product, class: ‘hover:underline’, method: :delete, data: { confirm...

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

1 1266 2

2022-01-29 08:01:09 UTC

New

PragProg Customers

Programming Phoenix LiveView: B6.0 pg 56 - current-user not set

It seems the second code snippet is missing the code to set the current_user: current_user: Accounts.get_user_by_session_token(session["...

#errata /book-programming-phoenix-liveview

0 1898 8

2023-01-11 03:06:26 UTC

New

PragProg Customers

Programming Phoenix LiveView: Live Upload Match Error

Book: Programming Phoenix LiveView, page 142 (157/378), file lib/pento_web/live/product_live/form_component.ex, in the function below: d...

#errata /book-programming-phoenix-liveview

7 1158 10

2023-01-26 13:23:12 UTC

New

PragProg Customers

Modern front-end development for Rails, second edition - Struggling to get the first chapter to work

After running /bin/setup, the first error was: The foreman' command exists in these Ruby versions: That was easy to fix: gem install fore...

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

1 1116 3

2023-06-22 14:09:32 UTC

New

PragProg Customers

Hands-on Rust: How do I debug a call chain in Rust?

When running the program in chapter 8, “Implementing Combat”, the printout Health before attack was never printed so I assumed something ...

#question /book-hands-on-rust

2 1034 2

2022-07-14 12:23:33 UTC

New

PragProg Customers

Kotlin and Android Development featuring Jetpack: error concerning function getCurrentStandings in BaseballDao.java

@mfazio23 I’m following the indications of the book and arriver ad chapter 10, but the app cannot be compiled due to an error in the Bas...

#question /book-kotlin-and-android-development-featuring-jetpack

1 3397 6

2022-07-22 14:06:06 UTC

New

Other popular topics

Backend>Learning Resources

Web Development with Clojure, Third Edition

Stop developing web apps with yesterday’s tools. Today, developers are increasingly adopting Clojure as a web-development platform. See f...

pragprog.com

#pragprog #web-development /clojure #published-book /book-web-development-with-clojure-third-edition

5 4584 1

2022-01-06 05:27:09 UTC

New

Game Dev>Learning Resources

The Ray Tracer Challenge

Brace yourself for a fun challenge: build a photorealistic 3D renderer from scratch! In just a couple of weeks, build a ray tracer that r...

pragprog.com

#pragprog #published-book /book-the-ray-tracer-challenge #algorithms

3 6115 0

2020-09-22 14:26:56 UTC

New

Game Dev>Learning Resources

Hands-on Rust: Effective Learning through 2D Game Development and Play

Rust is an exciting new programming language combining the power of C with memory safety, fearless concurrency, and productivity boosters...

pragprog.com

#pragprog /rust #published-book /book-hands-on-rust

117 10879 30

2024-11-09 13:24:20 UTC

New

General Dev>Code Editors

Onivim 2 Code Editor

Thanks to @foxtrottwist’s and @Tomas’s posts in this thread: Poll: Which code editor do you use? I bought Onivim! :nerd_face: https://on...

#code-editors /onivim /revery

88 6144 32

2023-05-15 07:32:26 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

General Dev>Dev Chat

Languages Without Garbage Collection

Continuing the discussion from Thinking about learning Crystal, let’s discuss - I was wondering which languages don’t GC - maybe we can c...

#garbage-collection

21 5575 7

2021-05-06 05:54:58 UTC

New

General Dev>Dev Chat

PragProg’s Medium Posts

Hello everyone! This thread is to tell you about what authors from The Pragmatic Bookshelf are writing on Medium.

#pragprog #blog-post

1147 29994 760

2025-07-10 13:36:16 UTC

New

Community>In The Spotlight

Spotlight: Rebecca Skinner (Author) Interview and AMA!

Author Spotlight Rebecca Skinner @RebeccaSkinner Welcome to our latest author spotlight, where we sit down with Rebecca Skinner, auth...

#author-spotlight /haskell /book-effective-haskell

106 11719 28

2022-11-16 10:29:37 UTC

New

Backend>Official News

Node.js v22.14.0 released!

Node.js v22.14.0 has been released. Link: Release 2025-02-11, Version 22.14.0 'Jod' (LTS), @aduh95 · nodejs/node · GitHub

github.com

/nodejs #official-news

0 4251 0

2025-02-11 15:30:14 UTC

New

General Dev>Reviews

Keyboard Review: UHK60V2 vs Defy vs Voyager vs Glove80 vs Svalboard

Ok, well here are some thoughts and opinions on some of the ergonomic keyboards I have, I guess like mini review of each that I use enoug...

/keyboards #uhk60v2 #defy #voyager #glove80 #svalboard

5 5681 7

2025-04-21 21:44:45 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)