Open twn39 opened 5 years ago
behaviour gen_server 相当于继承了gen_server接口,必须实现init,handle_call/3, handle_cast/2函数,handle_call是实现同步调用,handle_cast是实现异步调用,无需等待。
使用rebar3 shell调用:
{ok, Pid} = tcp_server:start_link().
tcp_server init...
{ok,<0.144.0>}
2> gen_server:call(Pid, {get}).
[]
3> gen_server:call(Pid, {add, [2,4,5]}).
[2,4,5]
4> gen_server:call(Pid, {add, [6,7,8]}).
[6,7,8]
5> gen_server:call(Pid, {get}).
[[6,7,8],[2,4,5]]