September 2013
Intermediate to advanced
548 pages
12h 25m
English
Content preview from Programming Erlang, 2nd Edition
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Filling in the gen_server Template
Making an OTP gen_server is largely a matter of filling
in a boilerplate template with some code of your own. The following is an
example; the individual sections of the gen_server were
listed in the previous section. The gen_server template itself is
built into Emacs, but if you’re not using Emacs, you can find the entire
template in The Generic Server Template.
I’ve filled in the template to make a bank module called
my_bank. This code is derived from the template. I’ve
removed all the comments from the template so you can clearly
see the structure of the code.
| my_bank.erl | |
| | -module(my_bank). |
| | |
| | -behaviour(gen_server). |
| | -export([start/0]). |
| | %% gen_server callbacks |
| | -export([init/1, handle_call/3, ... |
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.