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log_mf_h(3)		   Erlang Module Definition		   log_mf_h(3)

NAME
       log_mf_h	- An Event Handler which Logs Events to	Disk

DESCRIPTION
       The  log_mf_h  is  a gen_event handler module which can be installed in
       any gen_event process. It logs onto disk	all events which are  sent  to
       an  event  manager.  Each  event	is written as a	binary which makes the
       logging very fast. However, a tool such as the Report Browser (rb) must
       be  used	in order to read the files. The	events are written to multiple
       files. When all files have been used, the  first	 one  is  re-used  and
       overwritten.  The directory location, the number	of files, and the size
       of each file are	configurable. The  directory  will  include  one  file
       called index, and report	files 1, 2, .....

DATA TYPES
       args()

	      Term to be sent to  gen_event:add_handler/3.

EXPORTS
       init(Dir, MaxBytes, MaxFiles) ->	Args

       init(Dir, MaxBytes, MaxFiles, Pred) -> Args

	      Types:

		 Dir = file:filename()
		 MaxBytes = integer() >= 0
		 MaxFiles = 1..255
		 Pred =	fun((Event :: term()) -> boolean())
		 Args =	args()

	      Initiates	 the  event handler. This function returns Args, which
	      should be	used  in  a  call  to  gen_event:add_handler(EventMgr,
	      log_mf_h,	Args).

	      Dir specifies which directory to use for the log files. MaxBytes
	      specifies	the size of each individual file.  MaxFiles  specifies
	      how  many	 files	are used. Pred is a predicate function used to
	      filter the events. If no predicate function  is  specified,  all
	      events are logged.

SEE ALSO
       gen_event(3), rb(3)

Ericsson AB			  stdlib 2.4			   log_mf_h(3)

NAME | DESCRIPTION | DATA TYPES | EXPORTS | SEE ALSO

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