Getting started with gen_server

kv_db_server.erl

% Defines the module.
-module(kv_db_server).

% Makes the module implement the gen_server behaviour.
-behaviour(gen_server).

% Exports the required gen_server callbacks.
-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
         terminate/2, code_change/3]).

% Exports public functions that will ease interaction
% with the gen server.
-export([start/0]).