To add to the real-world use cases, Gettext stores the locale for each backend in the process dictionary and reads the locale out of the process dictionary when translating strings.
whatyouhide
Elixir Core Team
kelvinst
hubertlepicki
It does seem to me that both of these solutions could be worked around not to use process dictionary and rely on something like Registry, which would keep track of logger state/metadata or ecto’s currently checked out connection. There are advantages of this that include being able to properly clean things up after crashes compared to storing stuff in process dictionary that you basically lose when process dies.
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minhajuddin
There is a good talk about process dictionaries by @gregvaughn here: https://www.youtube.com/watch?v=zDIoFWwfBO0
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