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

Distributed Services With Go - gogoproto on linux

page 20: … protoc command… I had to additionally run the following go get commands in order to be able to compile protobuf code using go...

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

14 2953 7

2020-10-16 05:21:10 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 CSS with Tailwind: setting up Rails app

In case this helps anyone, I’ve had issues setting up the rails source code. Here were the solutions: In Gemfile, change gem 'rails' t...

#errata /book-modern-css-with-tailwind

3 1278 2

2022-01-05 00:19:21 UTC

New

PragProg Customers

Python Testing with pytest, Second Edition: cards pip install error (page 12)

#book-python-testing-with-pytest-second-edition Hi. Thanks for writing the book. I am just learning so this might just of been an issue ...

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

4 1191 3

2021-07-03 13:40:39 UTC

New

PragProg Customers

Python Testing with pytest, Second Edition: unrecognized arguments error (page 122)

When I run the coverage example to report on missing lines, I get: pytest --cov=cards --report=term-missing ch7 ERROR: usage: pytest [op...

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

0 4000 1

2021-12-03 05:36:38 UTC

New

PragProg Customers

Python Testing with pytest, Second Edition: InterpreterNotFound error when running tox (page 150)

When running tox for the first time, I got the following error: ERROR: InterpreterNotFound: python3.10 I realised that I was running ...

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

0 1306 1

2021-12-10 05:06:56 UTC

New

PragProg Customers

Hands-on Rust: Failed to Load Texture error (page 121)

Hi, I completed chapter 6 but am getting the following error when running: thread 'main' panicked at 'Failed to load texture: IoError(O...

/book-hands-on-rust

2 1310 3

2022-01-23 22:36:50 UTC

New

PragProg Customers

Powerful Command-Line Applications in Go: Exercise Solutions (many pages)

Is there any place where we can discuss the solutions to some of the exercises? I can figure most of them out, but am having trouble with...

#question /book-powerful-command-line-applications-in-go

17 1396 9

2022-02-09 15:00:31 UTC

New

PragProg Customers

The Definitive ANTLR 4 Reference - "Java.g4" grammer (used on page 40) no longer passes ANTLR

@parrt In the context of Chapter 4.3, the grammar Java.g4, meant to parse Java 6 compilation units, no longer passes ANTLR (currently 4....

#errata /book-the-definitive-antlr-4-reference

0 1020 3

2023-02-14 01:34:49 UTC

New

PragProg Customers

Programming Machine Learning: Setting up your system (p 13)

From page 13: On Python 3.7, you can install the libraries with pip by running these commands inside a Python venv using Visual Studio ...

#question /book-programming-machine-learning

1 989 3

2023-10-09 07:44:15 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

General Dev>Learning Resources

A Common-Sense Guide to Data Structures and Algorithms, Second Edition

Algorithms and data structures are much more than abstract concepts. Mastering them enables you to write code that runs faster and more e...

pragprog.com

#pragprog /python /ruby #published-book /book-a-common-sense-guide-to-data-structures-and-algorithms-second-edition #math #algorithms /js

19 6022 5

2020-08-14 00:58:37 UTC

New

General Dev>Dev Chat

Which vertical monitor do you use?

I’m thinking of buying a monitor that I can rotate to use as a vertical monitor? Also, I want to know if someone is using it for program...

#monitors #programming

51 4892 20

2023-06-28 07:23:42 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>Hardware

Custom keyboard keycaps

There’s a whole world of custom keycaps out there that I didn’t know existed! Check out all of our Keycaps threads here: https://forum....

#hardware /keyboards #keycaps #mechanical-keyboards

15 11086 19

2023-07-27 16:30:57 UTC

New

General Dev>Code Editors

Onivim 2 Code Editor

Thanks to @foxtrottwist’s and @Tomas’s posts in this thread: Poll: Which code editor do you use? I bought Onivim! :nerd_face: https://on...

#code-editors /onivim /revery

88 6144 32

2023-05-15 07:32:26 UTC

New

General Dev>Dev Chat

Warp—The blazingly fast, Rust-based terminal

A few weeks ago I started using Warp a terminal written in rust. Though in it’s current state of development there are a few caveats (tab...

/rust #terminal

52 6785 22

2025-02-26 17:47:24 UTC

New

Backend>Chat

Data Structures and Algorithms with Elixir

This is going to be a long an frequently posted thread. While talking to a friend of mine who has taken data structure and algorithm cou...

/elixir #algorithms #data-structures

108 11869 31

2024-11-14 02:14:00 UTC

New

Science/Tech>Health & Diet

David Sinclair's new Lifespan podcast

We’ve talked about his book briefly here but it is quickly becoming obsolete - so he’s decided to create a series of 7 podcasts, the firs...

#health #podcasts #bio-hackers #david-sinclair

87 6790 49

2022-04-12 16:27:36 UTC

New

Frontend>Chat

Online Hand to eye coordination test

Was just curious to see if any were around, found this one: I got 51/100: Not sure if it was meant to buy I am sure at times the b...

#online-tools

4 4562 1

2022-03-27 10:53:45 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)