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 Definitive ANTLR 4 Reference: Program deprecation warning

page 37 ANTLRInputStream input = new ANTLRInputStream(is); as of ANTLR 4 .8 should be: CharStream stream = CharStreams.fromStream(i...

#errata /book-the-definitive-antlr-4-reference

4 987 0

2020-07-05 23:04:12 UTC

New

PragProg Customers

Web Development with Clojure, Third Edition: (create-migration "guestbook") not working (page 9)

When I try the command to create a pair of migration files I get an error. user=> (create-migration "guestbook") Execution error (Ill...

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

5 1788 4

2023-07-27 14:17:36 UTC

New

PragProg Customers

Distributed Services with Go: Chapter 3 suggestions

Page 28: It implements io.ReaderAt on the store type. Sorry if it’s a dumb question but was the io.ReaderAt supposed to be io.ReadAt? ...

#errata /book-distributed-services-with-go

0 1302 3

2022-07-27 14:35:18 UTC

New

PragProg Customers

Programming Phoenix LiveView: Typo

Hi! I know not the intentions behind this narrative when called, on page XI: mount() |> handle_event() |> render() but the correc...

#errata /book-programming-phoenix-liveview

3 1307 17

2021-03-11 16:34:20 UTC

New

PragProg Customers

Intuitive Python: docker run… denied error (page 2)

Title: Intuitive Python: docker run… denied error (page 2) Attempted to run the docker command in both CLI and Powershell PS C:\Users\r...

#errata /book-intuitive-python

9 1263 4

2021-04-06 16:33:24 UTC

New

PragProg Customers

A Common-Sense Guide to Data Structures and Algorithms, Second Edition: erroneous extra space complexity (page400)

A Common-Sense Guide to Data Structures and Algorithms, Second Edition by Jay Wengrow @jaywengrow Hi, I have the paperback version of t...

#errata /book-a-common-sense-guide-to-data-structures-and-algorithms-second-edition

4 1180 2

2021-07-27 21:37:42 UTC

New

PragProg Customers

Domain Modeling Made Functional: Missing diagram on page 18

The book has the same “Problem space/Solution space” diagram on page 18 as is on page 17. The correct Problem/Solution space diagrams ar...

#errata /book-domain-modeling-made-functional

1 1078 1

2021-09-11 17:34:22 UTC

New

PragProg Customers

Modern Front-End Development for Rails - application does not start after run bin/setup (page xviii)

After some hassle, I was able to finally run bin/setup, now I have started the rails server but I get this error message right when I vis...

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

0 1461 5

2022-06-03 09:50:10 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

Programming Phoenix LiveView: PentoWeb.LayoutView errata (56)

root_layout: {PentoWeb.LayoutView, :root}, This results in the following following error: no “root” html template defined for PentoWeb...

#errata /book-programming-phoenix-liveview

8 1094 4

2023-10-22 17:25:26 UTC

New

Other popular topics

General Dev>Learning Resources

Forge Your Future with Open Source

Free and open source software is the default choice for the technologies that run our world, and it’s built and maintained by people like...

pragprog.com

#pragprog #published-book /book-forge-your-future-with-open-source

3 5654 0

2020-04-21 18:37:36 UTC

New

Backend>Learning Resources

Testing Elixir

Write Elixir tests that you can be proud of. Dive into Elixir’s test philosophy and gain mastery over the terminology and concepts that u...

pragprog.com

#pragprog /elixir #published-book /book-testing-elixir

33 5004 8

2021-01-05 06:17:50 UTC

New

Science/Tech>Tech Chat

Games! Which do you play?

Which, if any, games do you play? On what platform? I just bought (and completed) Minecraft Dungeons for my Nintendo Switch. Other than ...

#games

246 6097 101

2024-08-22 11:09:29 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

General Dev>Dev Chat

Which vertical monitor do you use?

I’m thinking of buying a monitor that I can rotate to use as a vertical monitor? Also, I want to know if someone is using it for program...

#monitors #programming

51 4892 20

2023-06-28 07:23:42 UTC

New

General Dev>Code Editors

Dendron: a personal knowledge management tool on top of VSCode

/vscode #visual-studio-code

30 7372 9

2021-05-05 12:15:29 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>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

General Dev>Questions

Do you prefer regular mechanical keyboards or low profile mechanical keyboards and why?

I have always used antique keyboards like Cherry MX 1800 or Cherry MX 8100 and almost always have modified the switches in some way, like...

/keyboards #mechanical-keyboards

27 3877 9

2023-02-06 21:10:15 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

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)