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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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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...
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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...
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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...
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I recently ran into a tricky error while testing a GenServer that uses a mock in its init/1.
Maybe this helps others, or maybe someone h...
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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} -> ...
New
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...
New
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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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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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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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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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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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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900. RLE Iterator
The problem needs to keep track of the encoding list
So I used GenServer to solve this
This is the first version of ...
New
Good morning fellow alchemists!
I have a question about quite a low level implementation topic regarding copy/concurrency semantics, let...
New
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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Earlier today, Code Sync posted the recording of @mhanberg’s Code BEAM America 2022 talk: “OTP Process Abstractions with :proc_lib”
I en...
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I have a worker process that lives for some time and contains some state. Worker processes can be spawned from multiple processes, so the...
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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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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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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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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...
New
Hello,
The module under test depends on three OTP process and thus they're started in test setup callback:
setup do
accounts = Te...
New
How can I register and call global process in a cluster using the new Registry api https://hexdocs.pm/elixir/Registry.html
New
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...
New
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 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'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...
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My Genserver terminates after a little while, after sending a few http requests. I can't understand the reason:
[error] GenServer MyGen...
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I’m building a postgres-backed job queue for Elixir. The way I have it setup, I have a JobDispatcher that polls the DB every N millisecon...
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Have been using Elixir / Phoenix for a while but still I get confused with the role of GenServer and its use cases. Would love to know ab...
New
I am trying to show post to the first friend of a person first and other’s after making a delay of 1 mins,For that i am using genserver. ...
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Hello, I was reading the Elixir School page on GenServer and I see that in the examples they use __MODULE__ as the name. For instance:
...
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