stratacast
Best way to name permanent tasks?
I’m trying to name a supervised, permanent task so I can find it easier. What’s the best way to go about this? I tried out this right here:
However, when I run Process.whereis(MyApplication.MyTask) instead of getting a PID back, I get nil. This is an ongoing looping task. From MyApplication.Application I also tried moving the starting of the Task via a different Supervisor call like so:
Supervisor.start_link([
{MyTask, arg}
], strategy: :one_for_one, id: :"MyApplication.MyTask")
And that didn’t seem to work either. I don’t know what exactly the :id would do, but I thought it was worth trying to pass that along.
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benwilson512
Tasks are really not the right kind of thing to have running for a long time, you should use a genserver instead.
However to your specific question, id is not the value used to set the name, you need a name option, but I’m not even sure if tasks take a name option.
NobbZ
Indeed, Task.start_link/3 does not allow for something like the :name option.
ityonemo
Process.register/2 should work. But yeah. At the point where you have a stateless datastructure receiving messages inside a task, it’s time to use gen_statem. If you prefer a genserver like interface and enforced state graph on top of gen_statem, I wrote StateServer library for this purpose.
Otoh, if you’re doing this for fun and exploration of otp I highly encourage it!!
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