September 2013
Intermediate to advanced
548 pages
12h 25m
English
Content preview from Programming Erlang, 2nd Edition
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Error Handling with Sockets
Error handling with sockets is extremely easy—basically you don’t have to do anything. As we said earlier, each socket has a controlling process (that is, the process that created the socket). If the controlling process dies, then the socket will be automatically closed.
This means that if we have, for example, a client and a server
and the server dies because of a programming error, the socket
owned by the server will be automatically closed, and the
client will be sent a {tcp_closed, Socket}
message.
We can test this mechanism with the following small program:
| socket_examples.erl | |
| | error_test() -> |
| | spawn(fun() -> error_test_server() end), |
| | lib_misc:sleep(2000), |
| | {ok,Socket} = gen_tcp:connect("localhost" ... |
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