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

Design and Build Great Web APIs: typo (page, 19, third bullet in URL list)

Title: Design and Build Great Web APIs - typo “https://company-atk.herokuapp.com/2258ie4t68jv” (page 19, third bullet in URL list) Typo:...

#pragprog #errata /book-design-and-build-great-web-apis

8 1931 7

2023-04-13 12:45:23 UTC

New

PragProg Customers

Build Websites with Hugo: Code will not run in a working Hugo setup

Hello Brian, I have some problems with running the code in your book. I like the style of the book very much and I have learnt a lot as...

#question /book-build-websites-with-hugo

0 1501 3

2021-01-29 18:54:24 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 1782 4

2023-07-27 14:17:36 UTC

New

PragProg Customers

Hands-on Rust: can_place logic is "inside out"

Title: Hands-On Rust (Chapter 11: prefab) Just played a couple of amulet-less games. With a bit of debugging, I believe that your can_p...

#errata /book-hands-on-rust

22 1622 20

2022-03-29 12:23:50 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 1274 3

2021-03-27 15:29:34 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 1297 3

2022-07-27 14:35:18 UTC

New

PragProg Customers

A Common-Sense Guide to Data Structures and Algorithms, Second Edition: (pg460)

Hello! Thanks for the great book. I was attempting the Trie (chap 17) exercises and for number 4 the solution provided for the autocorre...

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

0 1152 3

2023-03-10 05:02:03 UTC

New

PragProg Customers

Distributed Services With Go: Unable to pass readiness/liveness checks. (page 210, 215)

I’m not quite sure what’s going on here, but I’m unable to have to containers successfully complete the Readiness/Liveness checks. I’m im...

/book-distributed-services-with-go

5 1415 5

2022-08-31 00:14:29 UTC

New

PragProg Customers

Kotlin and Android Development featuring Jetpack: allprojects should be moved to settings.gradle (page 245)

The allprojects block listed on page 245 produces the following error when syncing gradle: “org.gradle.api.GradleScriptException: A prob...

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

1 2290 1

2022-02-26 23:52:12 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 1090 4

2023-10-22 17:25:26 UTC

New

Other popular topics

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 5882 101

2024-08-22 11:09:29 UTC

New

Science/Tech>Tech Chat

What are you watching?

Or looking forward to? :nerd_face:

#community

485 12328 258

2025-11-23 04:24:42 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

General Dev>Dev Chat

The V Programming Language

The V Programming Language Simple language for building maintainable programs V is already mentioned couple of times in the forum, but I...

#programminguages /v

21 12589 7

2021-04-12 15:13:42 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 5350 0

2022-02-04 00:32:03 UTC

New

Game Dev>Questions

Can I use Java to program a game for Nintendo switch?

I am trying to crate a game for the Nintendo switch, I wanted to use Java as I am comfortable with that programming language. Can you use...

/java #nintendo

8 3968 3

2023-09-15 11:15:04 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 10968 28

2022-11-16 10:29:37 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

Android>Questions

Unresolved Reference to android in build.gradle.kts – Beginner Issue

Hello, I’m a beginner in Android development and I’m facing an issue with my project setup. In my build.gradle.kts file, I have the foll...

#binding

0 5292 2

2024-12-09 21:07:33 UTC

New

Backend>Learning Resources

Ash Framework

Explore the power of Ash Framework by modeling and building the domain for a real-world web application. Rebecca Le @sevenseacat and ...

pragprog.com

#pragprog /elixir #published-book /ash /book-ash-framework

15 5191 9

2025-02-06 12:19:21 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)