traefik/vendor/github.com/mesosphere/mesos-dns/logging/logging.go
2017-03-09 13:13:02 +01:00

104 lines
2.5 KiB
Go

package logging
import (
"io/ioutil"
"log"
"os"
"strconv"
"sync/atomic"
"github.com/golang/glog"
)
var (
// VerboseFlag enables verbose logging if set to true.
VerboseFlag bool
// VeryVerboseFlag enables very verbose logging if set to true.
VeryVerboseFlag bool
// Verbose is this package's verbose Logger.
Verbose *log.Logger
// VeryVerbose is this package's very verbose Logger.
VeryVerbose *log.Logger
// Error is this package's error Logger.
Error *log.Logger
)
// Counter defines an interface for a monotonically incrementing value.
type Counter interface {
Inc()
}
// LogCounter implements the Counter interface with a uint64 register.
// It's safe for concurrent use.
type LogCounter struct {
value uint64
}
// Inc increments the counter by one.
func (lc *LogCounter) Inc() {
atomic.AddUint64(&lc.value, 1)
}
// String returns a string represention of the counter.
func (lc *LogCounter) String() string {
return strconv.FormatUint(atomic.LoadUint64(&lc.value), 10)
}
// LogOut holds metrics captured in an instrumented runtime.
type LogOut struct {
MesosRequests Counter
MesosSuccess Counter
MesosNXDomain Counter
MesosFailed Counter
NonMesosRequests Counter
NonMesosSuccess Counter
NonMesosNXDomain Counter
NonMesosFailed Counter
NonMesosForwarded Counter
}
// CurLog is the default package level LogOut.
var CurLog = LogOut{
MesosRequests: &LogCounter{},
MesosSuccess: &LogCounter{},
MesosNXDomain: &LogCounter{},
MesosFailed: &LogCounter{},
NonMesosRequests: &LogCounter{},
NonMesosSuccess: &LogCounter{},
NonMesosNXDomain: &LogCounter{},
NonMesosFailed: &LogCounter{},
NonMesosForwarded: &LogCounter{},
}
// PrintCurLog prints out the current LogOut and then resets
func PrintCurLog() {
VeryVerbose.Printf("%+v\n", CurLog)
}
// SetupLogs provides the following logs
// Verbose = optional verbosity
// VeryVerbose = optional verbosity
// Error = stderr
func SetupLogs() {
// initialize logging flags
if glog.V(2) {
VeryVerboseFlag = true
} else if glog.V(1) {
VerboseFlag = true
}
logopts := log.Ldate | log.Ltime | log.Lshortfile
if VerboseFlag {
Verbose = log.New(os.Stdout, "VERBOSE: ", logopts)
VeryVerbose = log.New(ioutil.Discard, "VERY VERBOSE: ", logopts)
} else if VeryVerboseFlag {
Verbose = log.New(os.Stdout, "VERY VERBOSE: ", logopts)
VeryVerbose = Verbose
} else {
Verbose = log.New(ioutil.Discard, "VERBOSE: ", logopts)
VeryVerbose = log.New(ioutil.Discard, "VERY VERBOSE: ", logopts)
}
Error = log.New(os.Stderr, "ERROR: ", logopts)
}