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

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

Distributed Services with Go: Chapter 1 Suggestions

Hi Travis! Thank you for the cool book! :slight_smile: I made a list of issues and thought I could post them chapter by chapter. I’m rev...

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

2 1179 3

2021-11-05 17:53:55 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

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 1074 1

2021-09-11 17:34:22 UTC

New

PragProg Customers

Modern Front-End Development for Rails: ERROR in tsconfig.json Chapter_01/01

@noelrappin Running the webpack dev server, I receive the following warning: ERROR in tsconfig.json TS18003: No inputs were found in c...

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

3 1436 3

2021-09-02 19:11:59 UTC

New

PragProg Customers

Kotlin and Android Development featuring Jetpack: android:tint vs app:tint (chapter 7, p186)

I found an issue in Chapter 7 regarding android:backgroundTint vs app:backgroundTint. How to replicate: load chapter-7 from zipfile i...

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

0 3519 3

2022-04-26 09:10:52 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

Agile Web Development with Rails 7: page 113 - Seeing the list of products

I’m a newbie to Rails 7 and have hit an issue with the bin/Dev script mentioned on pages 112-113. Iteration A1 - Seeing the list of prod...

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

0 2623 9

2024-01-06 20:36:27 UTC

New

PragProg Customers

Machine Learning in Elixir:Error installing EXLA dependency - Page 25

Getting an error when installing the dependencies at the start of this chapter: could not compile dependency :exla, "mix compile" failed...

#errata /book-machine-learning-in-elixir

1 1133 10

2025-01-03 12:05:01 UTC

New

PragProg Customers

Kotlin and Android Development featuring Jetpack: Transformations class doesn't seem to exist anymore (pp. 140-141

@mfazio23 Android Studio will not accept anything I do when trying to use the Transformations class, as described on pp. 140-141. Googl...

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

0 2132 5

2023-10-01 15:02:47 UTC

New

Other popular topics

General Dev>Hardware

Which keyboard do you have?

If it’s a mechanical keyboard, which switches do you have? Would you recommend it? Why? What will your next keyboard be? Pics always w...

#hardware /keyboards #sticky #mechanical-keyboards

144 8820 50

2021-01-07 23:58:36 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 3996 0

2020-09-22 14:26:56 UTC

New

Backend>Questions

Can someone explain the -t option/flag in docker run command?

I know that -t flag is used along with -i flag for getting an interactive shell. But I cannot digest what the man page for docker run com...

#docker

7 9055 2

2020-09-01 07:19:16 UTC

New

General Dev>Hardware

BIIP MT3 Extended 2048 Custom Keycap Set (Drop)

This looks like a stunning keycap set :orange_heart: A LEGENDARY KEYBOARD LIVES ON When you bought an Apple Macintosh computer in the e...

/keyboards #apple #keycaps #mechanical-keyboards

14 6365 7

2020-12-12 19:58:26 UTC

New

Backend>Chat

Rails console using 100% CPU in dev (fix)

If you are experiencing Rails console using 100% CPU on your dev machine, then updating your development and test gems might fix the issu...

/ruby /rails

3 3971 3

2021-02-04 07:08:45 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

Agile Web Development with Rails 7

Rails 7 completely redefines what it means to produce fantastic user experiences and provides a way to achieve all the benefits of single...

pragprog.com

#pragprog #web-development /ruby /rails #published-book /book-agile-web-development-with-rails-7

32 5327 9

2022-01-26 18:28:44 UTC

New

macOS>Chat

How to block any website on Mac using Little Snitch

If you want a quick and easy way to block any website on your Mac using Little Snitch simply… File > New Rule: And select Deny, O...

#macos #how-to #littlesnitch

5 9782 3

2022-07-05 00:59:40 UTC

New

Backend>Learning Resources

Programming Ruby 3.2 (5th Edition)

Programming Ruby is the most complete book on Ruby, covering both the language itself and the standard library as well as commonly used t...

twitter.com

#pragprog /ruby /rails #published-book /book-programming-ruby-3-2-5th-edition

28 6382 13

2024-11-17 04:34:14 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 2585 0

2025-02-11 15:30:14 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)