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

The Ray Tracer Challenge: various errata

The following is cross-posted from the original Ray Tracer Challenge forum, from a post by garfieldnate. I’m cross-posting it so that the...

#errata /book-the-ray-tracer-challenge

4 2434 3

2021-05-25 09:44:21 UTC

New

PragProg Customers

Docker for Rails Developers: Notes for Rails 6.1, Ruby 2.7.2

I thought that there might be interest in using the book with Rails 6.1 and Ruby 2.7.2. I’ll note what I needed to do differently here. ...

/book-docker-for-rails-developers

9 1177 1

2021-01-03 20:41:43 UTC

New

PragProg Customers

Programming Phoenix LiveView: P27, live_path confusion

I am working on the “Your Turn” for chapter one and building out the restart button talked about on page 27. It recommends looking into ...

#question /book-programming-phoenix-liveview

7 3505 14

2023-08-09 13:36:28 UTC

New

PragProg Customers

Modern CSS with Tailwind: setting up Rails app

In case this helps anyone, I’ve had issues setting up the rails source code. Here were the solutions: In Gemfile, change gem 'rails' t...

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

3 1278 2

2022-01-05 00:19:21 UTC

New

PragProg Customers

Hands-on Rust: Adequate docs for bracket_lib

I’m new to Rust and am using this book to learn more as well as to feed my interest in game dev. I’ve just finished the flappy dragon exa...

#question /book-hands-on-rust

5 1516 3

2021-07-15 19:29:13 UTC

New

PragProg Customers

Python Testing with pytest, Second Edition: error when installing editable package (page 178)

When installing Cards as an editable package, I get the following error: ERROR: File “setup.py” not found. Directory cannot be installe...

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

0 1739 1

2021-12-10 05:12:55 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

iOS Unit Testing by Example: 54 Don't seem to be getting the print out on tests (Xcode 13.2)

Hey there, I’m enjoying this book and have learned a few things alredayd. However, in Chapter 4 I believe we are meant to see the “>...

#question /book-ios-unit-testing-by-example

0 1963 3

2022-01-24 15:18:41 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: End Ch. 11 app runs but consistently crashes

I’ve got to the end of Ch. 11, and the app runs, with all tabs displaying what they should – at first. After switching around between St...

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

0 936 8

2024-01-05 05:43:55 UTC

New

Other popular topics

Backend>Learning Resources

Programming Machine Learning

Machine learning can be intimidating, with its reliance on math and algorithms that most programmers don't encounter in their regular wor...

pragprog.com

#pragprog #ai /python #published-book /book-programming-machine-learning #math #algorithms

6 5350 3

2023-10-03 15:08:13 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

Backend>Chat

What is the reason behind Rust’s web framework, Rocket, not performing as well as expected in the Techempower benchmarks?

I know that these benchmarks might not be the exact picture of real-world scenario, but still I expect a Rust web framework performing a ...

#web-frameworks /rust

36 7463 11

2020-06-21 10:50:02 UTC

New

Science/Tech>Tech Chat

What are you watching?

Or looking forward to? :nerd_face:

#community

498 13326 269

2026-01-28 02:22:15 UTC

New

Data Science

Genetic Algorithms in Elixir

From finance to artificial intelligence, genetic algorithms are a powerful tool with a wide array of applications. But you don't need an ...

#pragprog #ai /elixir #published-book /book-genetic-algorithms-in-elixir

25 5243 6

2021-02-09 12:32:09 UTC

New

General Dev>Code Editors

Doom-Emacs: Can't find emacs in your PATH

If you get Can't find emacs in your PATH when trying to install Doom Emacs on your Mac you… just… need to install Emacs first! :lol: bre...

#macos /emacs #doom-emacs

4 5837 0

2022-02-04 00:32:03 UTC

New

AI>In The News

How to fix the eyes in AI-generated images

aidemos.info

0 4508 0

2022-09-10 13:54:33 UTC

New

Android>Questions

Clipboard readtext not working in android webview

Inside our android webview app, we are trying to paste the copied content from another app eg (notes) using navigator.clipboard.readtext ...

#android #clipboard

1 5651 0

2022-09-27 18:52:03 UTC

New

Backend>Learning Resources

Engineering Elixir Applications

Develop, deploy, and debug BEAM applications using BEAMOps: a new paradigm that focuses on scalability, fault tolerance, and owning each ...

pragprog.com

#pragprog /elixir #published-book /book-engineering-elixir-applications

40 7136 21

2024-11-08 15:13:02 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)