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logger.go
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logger.go
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package configuration
import (
"log/syslog"
"os"
"github.com/go-kit/kit/log"
"github.com/go-kit/kit/log/level"
)
// LoggerWrapper interface of logger wrapper
type LoggerWrapper interface {
// Debug logger
Debug(message string, metadata ...interface{})
// Info logger
Info(message string, metadata ...interface{})
// Error logger
Error(message string, metadata ...interface{})
}
type loggerWrapper struct {
logger log.Logger
}
// NewLogger creates a new logger instance
func NewLogger(config ServerConfig) LoggerWrapper {
logger := log.NewJSONLogger(os.Stdout)
logger = log.With(
logger,
//"at", log.DefaultTimestampUTC,
//"caller", log.Caller(6),
)
switch config.LogLevel {
case syslog.LOG_EMERG, syslog.LOG_CRIT, syslog.LOG_ALERT, syslog.LOG_ERR:
logger = level.NewFilter(logger, level.AllowError())
case syslog.LOG_WARNING:
logger = level.NewFilter(logger, level.AllowWarn())
case syslog.LOG_INFO, syslog.LOG_NOTICE:
logger = level.NewFilter(logger, level.AllowInfo())
case syslog.LOG_DEBUG:
logger = level.NewFilter(logger, level.AllowDebug())
}
return &loggerWrapper{
logger: logger,
}
}
// Debug logger
func (l loggerWrapper) Debug(message string, metadata ...interface{}) {
if len(metadata) > 0 {
level.Debug(l.logger).Log("message", message, "meta", metadata)
} else {
level.Debug(l.logger).Log("message", message)
}
}
// Info logger
func (l loggerWrapper) Info(message string, metadata ...interface{}) {
if len(metadata) > 0 {
level.Info(l.logger).Log("message", message, "meta", metadata)
} else {
level.Info(l.logger).Log("message", message)
}
}
// Error logger
func (l loggerWrapper) Error(message string, metadata ...interface{}) {
if len(metadata) > 0 {
level.Error(l.logger).Log("message", message, "meta", metadata)
} else {
level.Error(l.logger).Log("message", message)
}
}