the headers that are fixes for this service.
Write the log message to a file.
Write the log message to a file.
the message to be logged.
the kinds of log (for example, "common").
Called just before the logger shuts down.
Called just before the logger shuts down.
a future that is completed when finished.
Closes the file appender.
Closes the file appender.
a future that is completed when the close is complete.
An appender that writes log messages to files.