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logging.go
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logging.go
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package logging
import (
"fmt"
"io"
"strings"
"github.com/anz-bank/sysl-go/config"
"github.com/anz-bank/sysl-go/splunk"
"github.com/sirupsen/logrus"
)
func LogFormatter(format string) (logrus.Formatter, error) {
lf := strings.ToLower(format)
if lf == "text" {
return &logrus.TextFormatter{DisableColors: true}, nil
}
if lf == "color" {
return &logrus.TextFormatter{DisableColors: false}, nil
}
if lf == "json" {
return &logrus.JSONFormatter{}, nil
}
return nil, fmt.Errorf("unknown log format '%s' [color, text, json]", format)
}
func Logger(w io.Writer, cfg *config.LogConfig) (*logrus.Logger, error) {
logFormatter, err := LogFormatter(cfg.Format)
if err != nil {
return nil, err
}
logger := &logrus.Logger{
Out: w,
Formatter: logFormatter,
Hooks: make(logrus.LevelHooks),
Level: cfg.Level,
ReportCaller: cfg.ReportCaller,
}
if cfg.Splunk != nil {
httpClient, clientErr := config.DefaultHTTPClient(nil)
if clientErr != nil {
return nil, clientErr
}
client := splunk.NewClient(
httpClient,
cfg.Splunk.Target,
cfg.Splunk.Token(),
cfg.Splunk.Source,
cfg.Splunk.SourceType,
cfg.Splunk.Index,
)
var levels []logrus.Level
for _, l := range logrus.AllLevels {
if l <= cfg.Level {
levels = append(levels, l)
}
}
hook := splunk.NewHook(client, levels)
logger.Hooks.Add(hook)
}
return logger, err
}