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

Python Testing with pytest: pytest now requires markers to be declared (downloadable code)

Many tasks_proj/tests directories exist in chapters 2, 3, 5 that have tests that use the custom markers smoke and get, which are not decl...

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

2 1383 2

2021-02-16 14:15:02 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: 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

The Cucumber for Java Book:

Hello! On page xix of the preface, it says there is a community forum "… for help if your’re stuck on one of the exercises in this book… ...

#question /book-the-cucumber-for-java-book

3 1143 1

2021-01-12 18:03:10 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

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 1157 3

2023-03-10 05:02:03 UTC

New

PragProg Customers

Programming Phoenix LiveView: B6.0 pg 56 - current-user not set

It seems the second code snippet is missing the code to set the current_user: current_user: Accounts.get_user_by_session_token(session["...

#errata /book-programming-phoenix-liveview

0 1898 8

2023-01-11 03:06:26 UTC

New

PragProg Customers

Hands-on Rust: Chapter 3: Can't get first hello to run

Hello @herbert ! Trying to get the very first “Hello, Bracket Terminal!" example to run (p. 53). I develop on an Amazon EC2 instance runn...

#question /book-hands-on-rust

0 1147 2

2025-01-07 19:49:45 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

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

Moonlander Keyboard (Mechanical) (Ergonomic) (Split) (Ortholinear)

Bought the Moonlander mechanical keyboard. Cherry Brown MX switches. Arms and wrists have been hurting enough that it’s time I did someth...

#hardware /keyboards #moonlander #mechanical-keyboards #ortholinear #ergonomic

212 17779 90

2021-07-13 15:33:55 UTC

New

Community>Journals

Programming Erlang Book Club

My first contact with Erlang was about 2 years ago when I used RabbitMQ, which is written in Erlang, for my job. This made me curious and...

/erlang /book-programming-erlang-2nd-edition #book-club

195 6815 95

2025-02-16 20:22:17 UTC

New

Community>Journals

Programming Crystal Book Club

Crystal recently reached version 1. I had been following it for awhile but never got to really learn it. Most languages I picked up out o...

/crystal /book-programming-crystal #book-club

155 4813 65

2021-07-09 11:44:56 UTC

New

General Dev>Sales

Get 50% off these PragProg books during our Think Again Sale

Think Again 50% Off Sale » The theme of this sale is new perspectives on familiar topics. Enter coupon code ThinkAgain2021 at checkout t...

#community #pragprog /elixir /book-a-common-sense-guide-to-data-structures-and-algorithms-second-edition /book-programming-machine-learning /book-the-ray-tracer-challenge /book-forge-your-future-with-open-source /book-software-design-x-rays #algorithms /book-testing-elixir #machine-learning #sale /book-concurrent-data-processing-in-elixir /book-intuitive-python

8 6415 2

2021-05-11 23:06:15 UTC

New

Backend>Learning Resources

Programming WebRTC

Use WebRTC to build web applications that stream media and data in real time directly from one user to another, all in the browser. ...

pragprog.com

#pragprog #published-book /js #webrtc /book-programming-webrtc

27 6969 6

2021-11-20 19:03:04 UTC

New

Data Science

Can AI/ML predict a lottery win?

Biggest jackpot ever apparently! :upside_down_face: I don’t (usually) gamble/play the lottery, but working on a program to predict the...

#ai #machine-learning

19 3939 10

2021-10-18 19:01:41 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

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

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 4771 3

2023-09-15 11:15:04 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)