You can call Application.stop and Application.start.

On Fri, Sep 24, 2021 at 1:10 PM Dan Calancea <d4no0...@gmail.com> wrote:

> Now the only question is: is it possible to restart elixir application
> programatically from code? I couldn't find any related documentation on
> this.
> On Friday, September 24, 2021 at 1:37:11 PM UTC+3 José Valim wrote:
>
>> In addition to what Jon wrote, it is worth keeping in mind that
>> config/runtime.exs is mostly a wrapper around Application.put_env/4 with
>> option persistent: true, as you well noted, so you can implement the
>> functionality you need using those functions if necessary.
>>
>> On Fri, Sep 24, 2021 at 12:17 PM Jon Rowe <ma...@jonrowe.co.uk> wrote:
>>
>>> Hi Dan
>>>
>>> Attempting to answer question 2, the most recent version of elixir adds
>>> runtime.exs to replace/improve on releases.exs which runs at boot of an
>>> Elixir app from mix or a release, see
>>> https://hexdocs.pm/elixir/Config.html#module-config-runtime-exs
>>>
>>> Cheers
>>> Jon
>>>
>>> On Fri, 24 Sep 2021, at 10:39 AM, Dan Calancea wrote:
>>>
>>> Let's suppose we have a elixir service that spawns some workers to do a
>>> job, the supervisor takes configuration from config and starts the workers.
>>> Now the classic way to configure such a project in prod is to use
>>> *releases.exs*, where you can configure environment variables and the
>>> release will reload the configuration*.*
>>>
>>> What I want to implement now is a dashboard that will control multiple
>>> services configuration, this means that there should be a centralized
>>> storage for configuration and some kind of signaling when to change
>>> configuration.
>>>
>>> Let's suppose we use postgres, some tables to store the configuration
>>> and custom signaling/ postgres NOTIFY to notify that the configuration has
>>> changed and needs to be reloaded.
>>>
>>> The questions that arise are:
>>>
>>>    1. Is it possible/recommended to change the *releases.exs *file
>>>    responsible for configuration in a release so that the new configuration 
>>> is
>>>    persisted across reloads?
>>>    2. Is it possible to implement this for dev environment? since as
>>>    far as I know dev environment does not support runtime configuration
>>>    currently.
>>>    3. Is it intended behavior that *releases.exs *replaces
>>>    configuration added with *Application.put_env/4 *with option *persistent:
>>>    true*?
>>>
>>>
>>>
>>>
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