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

Effective Testing with RSpec 3: Running Sequel migrations fails (page 84)

Following the steps described in Chapter 6 of the book, I’m stuck with running the migration as described on page 84: bundle exec sequel...

#errata /book-effective-testing-with-rspec-3

4 1152 1

2020-07-16 15:18:25 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

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 4102 2

2021-02-23 16:03:08 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

Modern Front-End Development for Rails: B7 no main folder in the source code (page xv)

On the page xv there is an instruction to run bin/setup from the main folder. I downloaded the source code today (12/03/21) and can’t see...

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

2 1452 11

2022-03-08 17:27:57 UTC

New

PragProg Customers

Distributed Services with Go: receiving Unknown flag: --go_opt when compiling protobuf (page 20)

When trying to generate the protobuf .go file, I receive this error: Unknown flag: --go_opt libprotoc 3.12.3 MacOS 11.3.1 Googling ...

/book-distributed-services-with-go

0 4924 3

2021-08-18 18:19:51 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 1126 3

2022-01-20 20:47:42 UTC

New

PragProg Customers

Hands on Rust: Need help with error - thread 'main' panicked at 'Failed to load texture

Hi, I need some help, I’m new to rust and was learning through your book. but I got stuck at the last stage of distribution. Whenever I t...

#question /book-hands-on-rust

3 1989 5

2022-12-03 00:17:31 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

Other popular topics

General Dev>Dev Chat

What are you listening to?

A thread that every forum needs! Simply post a link to a track on YouTube (or SoundCloud or Vimeo amongst others!) on a separate line an...

#community #music

202 5126 102

2025-07-26 22:00:31 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

Game Dev>Learning Resources

Apple Game Frameworks and Technologies

Design and develop sophisticated 2D games that are as much fun to make as they are to play. From particle effects and pathfinding to soci...

pragprog.com

#pragprog #ios #game-dev #macos /swift #published-book #apple /book-apple-game-frameworks-and-technologies

30 7995 10

2021-04-22 16:51:02 UTC

New

General Dev>Hardware

GMK Serika Keycaps - Serika 2 available to order now!

I have seen the keycaps I want - they are due for a group-buy this week but won’t be delivered until October next year!!! :rofl: The Ser...

/keyboards #keycaps #mechanical-keyboards

9 5097 7

2020-12-05 21:32:30 UTC

New

macOS>Chat

My thoughts on macOS vs Linux

Small essay with thoughts on macOS vs. Linux: I know @Exadra37 is just waiting around the corner to scream at me “I TOLD YOU SO!!!” but I...

#macos #linux

166 9730 69

2021-04-10 22:36:29 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 25846 24

2022-04-13 13:30:03 UTC

New

Community>In The Spotlight

Spotlight: Mike Riley (Author) Interview and AMA!

Author Spotlight Mike Riley @mriley This month, we turn the spotlight on Mike Riley, author of Portable Python Projects. Mike’s book ...

#author-spotlight /python #iot /book-portable-python-projects #internet-of-things

62 7035 19

2022-06-09 14:01:01 UTC

New

General Dev>In The News

X can’t stop spread of explicit, fake AI Taylor Swift images

Will Swifties’ war on AI fakes spark a deepfake porn reckoning?

arstechnica.com

/swift

0 8379 0

2024-01-26 05:47:12 UTC

New

Backend>Learning Resources

MySQL 9 Essentials

A concise guide to MySQL 9 database administration, covering fundamental concepts, techniques, and best practices. Neil Smyth MySQL...

pragprog.com

#pragprog #published-book /mysql /book-mysql-9-essentials

2 4162 0

2025-03-12 13:05:49 UTC

New

General Dev>Reviews

Keyboard Review: UHK60V2 vs Defy vs Voyager vs Glove80 vs Svalboard

Ok, well here are some thoughts and opinions on some of the ergonomic keyboards I have, I guess like mini review of each that I use enoug...

/keyboards #uhk60v2 #defy #voyager #glove80 #svalboard

5 5681 7

2025-04-21 21:44:45 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)