Fantom

 

const class

util::FileLogger

sys::Obj
  concurrent::ActorPool
    util::FileLogger

FileLogger appends Str log entries to a file. You can add a FileLogger as a Log handler:

sysLogger := FileLogger
{
  dir = scriptDir
  filename = "sys-{YYMM}.log"
}
Log.addHandler |rec| { sysLogger.writeLogRec(rec) }

See filename for specifying a datetime pattern for your log files.

Slots

dirSource

const File dir

Directory used to store log file(s).

filenameSource

const Str filename

Log filename pattern. The name may contain a pattern between {} using the pattern format of sys::DateTime.toLocale. For example to maintain a log file per month, use a filename such as "mylog-{YYYY-MM}.log".

makeSource

new make(|This|? f := null)

Constructor must set dir and filename

onOpenSource

const |OutStream|? onOpen

Callback called each time the file logger opens an existing or new log file. Callback should write any header information to the given output stream. The callback will occur on the logger's actor, so take care not incur additional actor messaging.

writeLogRecSource

Void writeLogRec(LogRec rec)

Append string log message to file.

writeStrSource

Void writeStr(Str msg)

Append string log message to file.