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nteventlog(3erl)


NAME

   nteventlog - Interface to Windows Event Log

DESCRIPTION

   nteventlog provides a generic interface to the Windows event log. It is
   part of the OS_Mon application, see os_mon(7).  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(3erl).

   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(3erl).

EXPORTS

   start(Identifier, MFA) -> Result
   start_link(Identifier, MFA) -> Result

          Types:

             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

          Types:

             Result = stopped

          Stops nteventlog. Usually  only  used  during  development.  The
          server  does not have to be shut down gracefully to maintain its
          state.

SEE ALSO

   os_mon(7), os_sup(3erl)

   Windows NT documentation



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