November 12, 2016

Guide to Replacing GenEvent with Supervisor and GenServer

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Guide to Replacing GenEvent with Supervisor and GenServer

Source: dashbit.co

In this article, José Valim addresses the limitations of using GenEvent in Elixir and the plan to deprecate it. Valim explains the implementation of a simple replacement using Supervisor and multiple GenServers, demonstrated through changes made in ExUnit, Elixir’s built-in test framework. The article details the old and new event manager implementations, highlights the benefits of using GenServer, such as better concurrency, and discusses the necessary design decisions. The article concludes with a practical example and performance considerations for the new setup.

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