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, .... .

EXPORTS

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

    Types
        Dir = string()
        MaxBytes = integer()
        MaxFiles = 0 < integer() < 256
        Pred = fun(Event) -> boolean()
        Event = term()
        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)