Latest #genserver Threads 
A long-running GenServer holds orders, positions, strategy state, and operational flags for a system trading real capital. The post walks...
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A look at five separate data flows inside a GenServer-per-session system and the design rules that fall out of each one: persist only wha...
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A long-running GenServer holds orders, positions, strategy state, and operational flags for a system trading real capital. The post walks...
New
Creating a process that maintains a state and makes it available for other processes is one of the most common use cases for GenServer. A...
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The genserver is only needed when a specific page is opened, and shouldn’t exist when none is on that page.
But adding it to application...
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This code let’s me connect with a 2d camera.
I’m running Linux and I can read the messages from the TCP server on the camera.
But it ne...
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I’ve been building AI agents in Elixir for a while and kept running into the same frustration, every framework either locks you into one ...
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DGen - A distributed GenServer
I love GenServer. There are only 2 things stopping me from writing an entire app with them:
Durability: ...
New
Running an FBP pipeline where each node is a GenServer. Need to move a segment of the running pipeline (multiple connected nodes) from on...
New
The Issue of Enums in Elixir
Elixir doesn’t have a native enum construct, so we usually rely on atoms, strings, or macros to represent na...
New
This Week's Trending
This Month's Trending
A look at five separate data flows inside a GenServer-per-session system and the design rules that fall out of each one: persist only wha...
New
A long-running GenServer holds orders, positions, strategy state, and operational flags for a system trading real capital. The post walks...
New
This Year's Trending
Here’s a preview:
Here’s the link to download:
GenServer cheatsheet
Tell me what you think!
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DGen - A distributed GenServer
I love GenServer. There are only 2 things stopping me from writing an entire app with them:
Durability: ...
New
I’ve been building AI agents in Elixir for a while and kept running into the same frustration, every framework either locks you into one ...
New
A long-running GenServer holds orders, positions, strategy state, and operational flags for a system trading real capital. The post walks...
New
Hey,
I need help to find a scalable and efficient solution to:
Store large number of elements (username)
Table is not static => ele...
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Hi,
This has probably been asked a gazilion times…
Is there a reilable way to trap the stop of a GenServer in development, that means w...
New
The Issue of Enums in Elixir
Elixir doesn’t have a native enum construct, so we usually rely on atoms, strings, or macros to represent na...
New
I have an app that has many users connecting to it.
When each user tries to connect to a room, they should be connected to a “MyApp.Room...
New
I’ve ran into several situations where LiveView and gen_statem being combined would be ideal. The simplest example would be any kind of c...
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I’ve got an annoying problem on my hands. I’m open to a different approach as well.
I’m writing a GenServer to store a live auction, whe...
New
This code let’s me connect with a 2d camera.
I’m running Linux and I can read the messages from the TCP server on the camera.
But it ne...
New
Creating a process that maintains a state and makes it available for other processes is one of the most common use cases for GenServer. A...
New
The genserver is only needed when a specific page is opened, and shouldn’t exist when none is on that page.
But adding it to application...
New
Running an FBP pipeline where each node is a GenServer. Need to move a segment of the running pipeline (multiple connected nodes) from on...
New
Hello :slight_smile:
I’m struggling to get GenServer working with Bandit.
I’d like to build a simple chat server, with a POST / endpoin...
New
Last Three Year's Trending
During my recent query with regard to “Functional Web Development with Elixir, OTP, and Phoenix”, Lance Halvorson kindly directed my atte...
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When using simple processes we can spawn a recursive loop with a timeout like this:
iex> receive do
...> {:hello, msg} -> ...
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I am wondering for advice on how to monitor an application with many genservers doing long-running work. Often we want to know “how many...
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I’ve got a simple app that starts up a supervised Broadway pipeline. This is fine for regular use, but it makes testing difficult:
de...
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GenServer.call might fail when a process we try to execute a call on no longer exists. Are there any guidelines on how to handle such sit...
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Hey I’ve got a quick beginner question:
I’m making requests to an external API using Finch.
The API is rate limited, and when the limit...
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Hi,
I have a worker GenServer posting some results to its manager GenServer. The result is rather long and may contain hundreds of items...
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:snake: :test_tube: Venomous aims to simplify the concurrent use of erlport Python Ports, focusing on dynamic extensibility such as spawn...
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I have a genserver that wants to spawn multiple tasks (in this case multiple api calls to different services) and wait for all of them to...
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I’m building a Phoenix server that handles financial transactions, It’s very simple it creates an account, creates a user, and processes ...
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Howdy! I’m a researcher trying to understand better how people use Elixir. I have a fair amount of personal experience with Elixir, but I...
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This question might dive into sub-areas, so I would like to clarify as much as possible.
Application:
The application has multiple gens...
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We have a LiveView that presents a form and collects some sensitive information from the currently logged in user and sends it out to an ...
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I’ve got a Genserver that writes messages to stdout. I can’t figure out how to test using capture_io. Documentation says By default, ca...
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Good morning fellow alchemists!
I have a question about quite a low level implementation topic regarding copy/concurrency semantics, let...
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Trending Over Three Years
I have a gen server spawned by simple one for one supervisor, and when I return {:stop, {:shutdown, reason}, state} process remains alive...
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Hey all, I’m new to elixir and getting the following error:
** (FunctionClauseError) no function clause matching in TSS.DriverStatuses.l...
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I'm deep into debugging a very high memory usage problem in a group of GenServers.
There are two types of GenServer implementations I'm...
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Hey everyone,
this has been brewing in my head some time and it came up again while reading Adopting Elixir.
GenServers, supervisors et...
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I am working on a simple introduction talk to OTP. One of the things I myself am wondering about, however, is when Agent is useful and wh...
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Hello everyone :wave:
Today I am very excited to announce a project that I have been working on for almost 3 months now.
The project is...
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Hi All,
I just watched @lance's talk from ElixirConfEU and I want to talk about it [:smile:]
Lance discusses the idea of putting all ...
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I've condensed the problem I found while playing around with GenServers (I don't know much about OTP yet) into the following script:
de...
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Hello,
The module under test depends on three OTP process and thus they're started in test setup callback:
setup do
accounts = Te...
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How can I register and call global process in a cluster using the new Registry api https://hexdocs.pm/elixir/Registry.html
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I’m a bit over halfway through the course, and so far I really like it, especially the very logical order of moving up from basic code th...
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I am currently scratching my head, because I am already trapping exits at one point, but I am not able to get it to work at another point...
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I writing an Elixir app with GenServer that starts an external application on boot and shuts it down and does other clean-up on exit. I'v...
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Out of curiosity I started to learn how to gracefully shutdown an Elixir application, but I have some trouble understanding the behavior ...
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I'm building an app which provides a read-only GraphQL API to a React frontend. The app stores details of many after-school programs in a...
New
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