Event Handler.
Behaviours: gen_event
.
Authors: Francesca Gangemi ([email protected]
).
code_change/3 | Convert process state when code is changed. |
handle_call/2 | Whenever an event manager receives a request sent using gen_event:call/3,4, this function is called for the specified event handler to handle the request. |
handle_event/2 | |
handle_info/2 | This function is called for each installed event handler when an event manager receives any other message than an event or a synchronous request (or a system message). |
init/1 | |
terminate/2 | Whenever an event handler is deleted from an event manager, this function is called. |
code_change(OldVsn, State, Extra) -> {ok, NewState}
Convert process state when code is changed
handle_call(Request, State) -> {ok, Reply, State} | {swap_handler, Reply, Args1, State1, Mod2, Args2} | {remove_handler, Reply}
Whenever an event manager receives a request sent using gen_event:call/3,4, this function is called for the specified event handler to handle the request.
handle_event(Event, State) -> any()
handle_info(Info, State) -> {ok, State} | {swap_handler, Args1, State1, Mod2, Args2} | remove_handler
This function is called for each installed event handler when an event manager receives any other message than an event or a synchronous request (or a system message).
init(Args) -> any()
terminate(Reason, State) -> void()
Whenever an event handler is deleted from an event manager, this function is called. It should be the opposite of Module:init/1 and do any necessary cleaning up.