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Description: Hi, I am a programmer and entrepreneur from South Africa and this is my personal blog where I share thoughts primarily on programming and business.
Hi, I’m Andrew, a programer and entrepreneur from South Africa, founder of Sitesure for monitoring websites, APIs, and background jobs. Thanks for visiting and reading.
Why code_change wouldn’t work on my GenServer I had a GenServer that I wanted to change the state of during a hot upgrade release, so I dutifully reached for code_change/3 as per the documentation, but no matter how hard I tried, I couldn’t get it to work. I read and re-read all the documentation I could find on releases and hot upgrades and tried and tried again but my callback was never called.
I quite like Dave Thomas’ method of splitting the API from the server implementation so my code looked something like this:
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