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 - where are the errata?

As per the title, thanks.

/book-the-ray-tracer-challenge

6 1681 4

2020-07-16 14:30:43 UTC

New

PragProg Customers

Web Development with Clojure, Third Edition: Issue adding Shadow CLJS

Title: Web Development with Clojure, Third Edition, pg 116 Hi - I just started chapter 5 and I am stuck on page 116 while trying to star...

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

4 1199 4

2021-01-10 05:30:17 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 1185 3

2021-11-05 17:53:55 UTC

New

PragProg Customers

Build a Weather Station with Elixir and Nerves: SGP30 vs SGP40

This is as much a suggestion as a question, as a note for others. Locally the SGP30 wasn’t available, so I ordered a SGP40. On page 53, ...

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

0 1292 2

2024-03-20 19:56:42 UTC

New

PragProg Customers

Kotlin and Android Development featuring Jetpack: SwitchCompat's thumbTint and trackTint being ignored (page 76)

I think I might have found a problem involving SwitchCompat, thumbTint, and trackTint. As entered, the SwitchCompat changes color to hol...

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

0 2749 2

2022-05-13 11:00:18 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 1962 4

2021-11-16 04:25:39 UTC

New

PragProg Customers

Programming Phoenix LiveView: book not updated to version 1.6 (p. 18)

In general, the book isn’t yet updated for Phoenix version 1.6. On page 18 of the book, the authors indicate that an auto generated of ro...

#errata /book-programming-phoenix-liveview

9 2051 12

2022-02-08 11:31:40 UTC

New

PragProg Customers

Agile Web Development with Rails 7: page 152, page 153:

AWDWR 7, page 152, page 153: Hello everyone, I’m a little bit lost on the hotwire part. I didn’t fully understand it. On page 152 @rub...

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

0 1230 4

2023-01-16 15:26:22 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 1159 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 2155 5

2023-10-01 15:02:47 UTC

New

Other popular topics

General Dev>Dev Chat

What dev-related stuff have you been up to?

Reading something? Working on something? Planning something? Changing jobs even!? If you’re up for sharing, please let us know what you’...

#community

1051 21715 396

2026-02-05 08:11:31 UTC

New

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

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

General Dev>Dev Chat

Standing Desks

No chair. I have a standing desk. This post was split into a dedicated thread from our thread about chairs :slight_smile:

#workspace #opinions

177 9554 77

2022-09-27 18:40:05 UTC

New

General Dev>Dev Chat

Which language or framework do you want to learn next?

Curious to know which languages and frameworks you’re all thinking about learning next :upside_down_face: Perhaps if there’s enough peop...

#community #learning

243 6639 97

2025-12-01 07:17:12 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 6212 8

2021-01-16 12:33:23 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 5662 43

2021-09-06 19:12:48 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 11719 28

2022-11-16 10:29:37 UTC

New

Backend>Learning Resources

Simplicity

Fight complexity and reclaim the original spirit of agility by learning to simplify how you develop software. The result: a more humane a...

pragprog.com

#pragprog #published-book /book-simplicity

10 6553 8

2025-03-14 21:53:12 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)