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

Programming Flutter: Image.toByteData() does not exist (page40)

your book suggests to use Image.toByteData() to convert image to bytes, however I get the following error: "the getter ‘toByteData’ isn’t...

/book-programming-flutter #question

1 4089 2

2021-02-23 16:03:08 UTC

New

PragProg Customers

Web Development with Clojure, Third Edition: migrations/create not working: p159

Title: Web Development with Clojure, Third Edition - migrations/create not working: p159 When I execute the command: user=> (create-...

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

5 1083 2

2020-11-14 22:24:32 UTC

New

PragProg Customers

Programming Phoenix LiveView: B03 (page 56-57) auth exercise

Dear Sophie. I tried to do the “Authorization” exercise and have two questions: When trying to plug in an email-service, I found the ...

#question /book-programming-phoenix-liveview

1 1180 3

2021-05-04 15:14:02 UTC

New

PragProg Customers

Python Testing with pytest, Second Edition: File not Found Error (page 43)

I ran this command after installing the sample application: $ cards add do something --owner Brian And got a file not found error: Fil...

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

5 4386 7

2021-07-03 13:51:08 UTC

New

PragProg Customers

Build a Weather Station with Elixir and Nerves: Problem connecting to Postgres with Grafana

Title: Build a Weather Station with Elixir and Nerves: Problem connecting to Postgres with Grafana on (page 64) If you follow the defau...

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

0 1958 4

2021-11-16 04:25:39 UTC

New

PragProg Customers

Python Testing with pytest, Second Edition:Abou epub format

Is the book’s epub format available to read on Google Play Books?

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

0 1122 3

2022-01-20 20:47:42 UTC

New

PragProg Customers

Programming Phoenix LiveView: Display Image Uploads (pdf p142)

The markup used to display the uploaded image results in a Phoenix.LiveView.HTMLTokenizer.ParseError error. lib/pento_web/live/product_l...

#errata /book-programming-phoenix-liveview

2 2097 9

2022-07-05 17:58:54 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 1154 10

2023-01-26 13:23:12 UTC

New

PragProg Customers

Docker for Rails Developers - 'docker-machine' command deprecated (page 156)

Docker-Machine became part of the Docker Toolbox, which was deprecated in 2020, long after Docker Desktop supported Docker Engine nativel...

/book-docker-for-rails-developers #suggestion

0 896 0

2023-03-06 18:01:33 UTC

New

Other popular topics

General Dev>Code Editors

Poll: Which code editor do you use?

You might be thinking we should just ask who’s not using VSCode :joy: however there are some new additions in the space that might give V...

#community #polls /vim /emacs #code-editors /vscode #notepad /sublime-text #atom /textmate #codespaces #brackets /onivim #geany

121 5409 61

2025-09-05 00:52:19 UTC

New

Backend>Questions

Erlang's not installing on macOS Big Sur "You are natively building Erlang/OTP for a later version of MacOSX than current version"

Just done a fresh install of macOS Big Sur and on installing Erlang I am getting: asdf install erlang 23.1.2 Configure failed. checking ...

#macos /erlang #big-sur #asdf

10 5914 8

2021-01-16 12:33:23 UTC

New

General Dev>Dev Chat

How fast do you type? Check your WPM here!

Do the test and post your score :nerd_face: :keyboard: If possible, please add info such as the keyboard you’re using, the layout (Qw...

typing-speed-test.aoeu.eu

/keyboards

82 7310 31

2021-07-10 05:52:20 UTC

New

Linux>Questions

What is the most minimalist Linux server distro?

I am asking for any distro that only has the bare-bones to be able to get a shell in the server and then just install the packages as we ...

#linux #servers

66 23964 24

2022-04-13 13:30:03 UTC

New

Backend>Learning Resources

Concurrent Data Processing in Elixir

Learn different ways of writing concurrent code in Elixir and increase your application's performance, without sacrificing scalability or...

pragprog.com

#pragprog /elixir #published-book /book-concurrent-data-processing-in-elixir

78 5131 24

2021-09-04 12:35:42 UTC

New

Backend>Learning Resources

Python Testing with pytest, Second Edition

Create efficient, elegant software tests in pytest, Python's most powerful testing framework. Brian Okken @brianokken Edited by Kat...

pragprog.com

#pragprog /python #published-book /book-python-testing-with-pytest-second-edition

16 5119 4

2021-06-25 16:57:39 UTC

New

Backend>Chat

Using Regular Expressions in Erlang

Intensively researching Erlang books and additional resources on it, I have found that the topic of using Regular Expressions is either c...

/erlang #regular-expressions

91 5416 43

2021-09-06 19:12:48 UTC

New

General Dev>In The News

Safari now supports File System Access API with private origin

The File System Access API with Origin Private File System. WebKit supports new API that makes it possible for web apps to create, open,...

webkit.org

#api #safari

43 3467 21

2022-03-03 12:49:07 UTC

New

Windows>Chat

Taskbar Overflow Menu (NOT System Tray Overflow)

There appears to have been an update that has changed the terminology for what has previously been known as the Taskbar Overflow - this h...

#taskbar-overflow-win-11

3 2694 2

2023-02-13 08:43:55 UTC

New

Community>In The Spotlight

Spotlight: Peter Ullrich (Author) Interview and AMA!

Author Spotlight: Peter Ullrich @PJUllrich Data is at the core of every business, but it is useless if nobody can access and analyze ...

/elixir /phoenix /book-building-table-views-with-phoenix-liveview

72 4211 21

2023-10-17 17:07:59 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)