brent s
39e0a1fd43
Adding more Event Log support, and modifying the loggers so they return errors in their operational functions.
96 lines
3.9 KiB
Go
96 lines
3.9 KiB
Go
package logging
|
|
|
|
import (
|
|
"log"
|
|
`os`
|
|
)
|
|
|
|
/*
|
|
Logger is one of the various loggers offered by this module.
|
|
*/
|
|
type Logger interface {
|
|
Alert(s string, v ...interface{}) (err error)
|
|
Crit(s string, v ...interface{}) (err error)
|
|
Debug(s string, v ...interface{}) (err error)
|
|
Emerg(s string, v ...interface{}) (err error)
|
|
Err(s string, v ...interface{}) (err error)
|
|
Info(s string, v ...interface{}) (err error)
|
|
Notice(s string, v ...interface{}) (err error)
|
|
Warning(s string, v ...interface{}) (err error)
|
|
DoDebug(d bool) (err error)
|
|
SetPrefix(p string) (err error)
|
|
GetPrefix() (p string, err error)
|
|
Setup() (err error)
|
|
Shutdown() (err error)
|
|
}
|
|
|
|
/*
|
|
StdLogger uses the log package in stdlib to perform all logging. The default is to write to STDOUT.
|
|
If you wish to modify the underling log.Logger object, you can access it directly via StdLogger.Logger.
|
|
*/
|
|
type StdLogger struct {
|
|
// All log.Logger fields/methods are exposed.
|
|
*log.Logger
|
|
/*
|
|
EnableDebug indicates if the debug filter should be disabled (true) or if the filter should be enabled (false).
|
|
This prevents potential data leak of sensitive information, as some loggers (e.g. FileLogger) will otherwise write all messages.
|
|
*/
|
|
EnableDebug bool
|
|
// Prefix indicates the prefix for log entries; in shared logs, this helps differentiate the source.
|
|
Prefix string
|
|
/*
|
|
LogFlags control some of the formatting options presented as an OR'd value.
|
|
See https://pkg.go.dev/log#pkg-constants for flag details.
|
|
e.g.:
|
|
*StdLogger.LogFlags = log.Ldate | log.Lmicroseconds | log.Llongfile | log.LUTC // a very detailed log output
|
|
*StdLogger.LogFlags = log.Ldate | log.Ltime // the flags used by log.Default() (also available as simply log.LstdFlags)
|
|
The default is 0; no flags (no output except prefix if non-empty and message).
|
|
You will need to run *StdLogger.Shutdown and then *StdLogger.Setup again if you wish to change this.
|
|
*/
|
|
LogFlags int
|
|
}
|
|
|
|
/*
|
|
FileLogger uses a StdLogger with a file handle writer to write to the file given at Path.
|
|
|
|
NOTE: If you wish to change the FileLogger.StdLogger.LogFlags, do *not* run FileLogger.StdLogger.Setup after doing so as this
|
|
will instead create a logger detached from the file handler. Instead, be sure to call FileLogger.Setup.
|
|
(Alternatively, run FileLogger.Shutdown and replace your logger with a new FileLogger.)
|
|
*/
|
|
type FileLogger struct {
|
|
// StdLogger is used for the log formation and handling. See StdLogger for more details.
|
|
StdLogger
|
|
// Path is the path to the logfile.
|
|
Path string
|
|
/*
|
|
EnableStdOut is true if the log will send to STDOUT as well as the file (and STDERR if FileLogger.EnableStdErr == true).
|
|
If false (default), it will only (silently) write to the log file.
|
|
You will need to run FileLogger.Shutdown and then FileLogger.Setup again if you wish to change this.
|
|
*/
|
|
EnableStdOut bool
|
|
/*
|
|
EnableStdErr is true if the log will send to STDERR as well as the file (and STDOUT if FileLogger.EnableStdOut == true).
|
|
If false (default), it will only (silently) write to the log file.
|
|
You will need to run *FileLogger.Shutdown and then *FileLogger.Setup again if you wish to change this.
|
|
*/
|
|
EnableStdErr bool
|
|
// writer is used for the writing out of the log file.
|
|
writer *os.File
|
|
}
|
|
|
|
// MultiLogger is used to contain one or more Loggers and present them all as a single Logger.
|
|
type MultiLogger struct {
|
|
/*
|
|
EnableDebug indicates if the debug filter should be disabled (true) or if the filter should be enabled (false).
|
|
This prevents potential data leak of sensitive information, as some loggers (e.g. FileLogger) will otherwise write all messages.
|
|
*/
|
|
EnableDebug bool
|
|
// Prefix indicates the prefix for log entries; in shared logs, this helps differentiate the source.
|
|
Prefix string
|
|
/*
|
|
Loggers contains a map of map[logname]Logger. It can be used to set log-specific options, or replace a Logger
|
|
with one of a different type or options.
|
|
*/
|
|
Loggers map[string]Logger
|
|
}
|