nteventlog
Interface to Windows Event Log
nteventlog provides a generic interface to the Windows
event log. It is part of the OS_Mon application, see
os_mon(6). Available for
Windows versions where the event log is available. That is, not
for Windows 98 and some other older Windows versions, but for most
(all?) newer Windows versions.
This module is used as the Windows backend for os_sup, see
os_sup(3).
To retain backwards compatibility, this module can also be used
to start a standalone nteventlog process which is not part
of the OS_Mon supervision tree. When starting such a process,
the user has to supply an identifier as well as a callback
function to handle the messages.
The identifier, an arbitrary string, should be reused whenever
the same application (or node) wants to start the process.
nteventlog is informed about all events that have arrived
to the eventlog since the last accepted message for the current
identifier. As long as the same identifier is used, the same
eventlog record will not be sent to nteventlog more than
once (with the exception of when graved system failures arise, in
which case the last records written before the failure may be
sent to Erlang again after reboot).
If the event log is configured to wrap around automatically,
records that have arrived to the log and been overwritten when
nteventlog was not running are lost. It however detects
this state and loses no records that are not overwritten.
The callback function works as described in os_sup(3).
Functions
start(Identifier, MFA) -> Result
start_link(Identifier, MFA) -> Result
Identifier = string() | atom()MFA = {Mod, Func, Args}Mod = Func = atom()Args = [term()]Result = {ok, Pid} | {error, {already_started, Pid}}Pid = pid()
This function starts the standalone nteventlog process
and, if start_link/2 is used, links to it.
Identifier is an identifier as described above.
MFA is the supplied callback function. When
nteventlog receives information about a new event, this
function will be called as apply(Mod, Func, [Event|Args]) where Event is a tuple
stop() -> stopped
Result = stopped
Stops nteventlog. Usually only used during
development. The server does not have to be shut down
gracefully to maintain its state.