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logger.go
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logger.go
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package logger
import (
"encoding/json"
"fmt"
"io"
"io/ioutil"
"os"
"strconv"
"strings"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
)
type JobEvent struct {
Type string `json:"type"`
Data interface{} `json:"data"`
Node string `json:"node"`
Job string `json:"job"`
}
var Stdout = struct{ io.Writer }{os.Stdout}
var Stderr = struct{ io.Writer }{os.Stderr}
func Initialize() {
// Needs no functionality, but need some function to create
}
func init() {
zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
logLevelString := strings.ToLower(os.Getenv("LOG_LEVEL"))
logTypeString := strings.ToLower(os.Getenv("LOG_TYPE"))
switch {
case logLevelString == "trace":
zerolog.SetGlobalLevel(zerolog.TraceLevel)
case logLevelString == "debug":
zerolog.SetGlobalLevel(zerolog.DebugLevel)
case logLevelString == "error":
zerolog.SetGlobalLevel(zerolog.ErrorLevel)
case logLevelString == "warn":
zerolog.SetGlobalLevel(zerolog.WarnLevel)
case logLevelString == "fatal":
zerolog.SetGlobalLevel(zerolog.FatalLevel)
default:
zerolog.SetGlobalLevel(zerolog.InfoLevel)
}
//file, _ := ioutil.TempFile("tmp", "logs")
textWriter := zerolog.ConsoleWriter{Out: Stdout, TimeFormat: "[0607]", NoColor: false, PartsOrder: []string{
zerolog.TimestampFieldName,
zerolog.LevelFieldName,
zerolog.CallerFieldName,
zerolog.MessageFieldName}}
// output.FormatLevel = func(i interface{}) string {
// return strings.ToUpper(fmt.Sprintf("| %-6s|", i))
// }
textWriter.FormatMessage = func(i interface{}) string {
return fmt.Sprintf("%s", i)
}
textWriter.FormatFieldName = func(i interface{}) string {
return fmt.Sprintf("%s:", i)
}
textWriter.FormatFieldValue = func(i interface{}) string {
return strings.ToUpper(fmt.Sprintf("%s", i))
}
zerolog.CallerMarshalFunc = func(file string, line int) string {
short := file
seperator_count := 2
counted_separators := 0
for i := len(file) - 1; i > 0; i-- {
if file[i] == '/' {
counted_separators += 1
if counted_separators >= seperator_count {
short = file[i+1:]
break
}
}
}
file = short
return file + ":" + strconv.Itoa(line)
}
// we default to text output
var useLogWriter io.Writer = textWriter
if logTypeString == "json" {
// we just want json
useLogWriter = os.Stdout
} else if logTypeString == "combined" {
// we just want json and text and events
useLogWriter = zerolog.MultiLevelWriter(textWriter, os.Stdout)
} else if logTypeString == "event" {
// we just want events
useLogWriter = ioutil.Discard
}
log.Logger = zerolog.New(useLogWriter).With().Timestamp().Caller().Logger()
}
func LoggerWithRuntimeInfo(runtimeInfo string) zerolog.Logger {
return log.With().Str("R", runtimeInfo).Logger()
}
func LoggerWithNodeAndJobInfo(nodeId string, jobId string) zerolog.Logger {
return log.With().Str("N", nodeId).Str("J", jobId).Logger()
}
func LogJobEvent(event JobEvent) {
event.Node = event.Node[:8]
event.Job = event.Job[:8]
eventBytes, err := json.Marshal(event)
if err != nil {
return
}
if os.Getenv("LOG_EVENT_FILE") != "" {
f, err := os.OpenFile(os.Getenv("LOG_EVENT_FILE"),
os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
return
}
defer f.Close()
if _, err := f.WriteString(fmt.Sprintf("%s\n", string(eventBytes))); err != nil {
return
}
}
logType := strings.ToLower(os.Getenv("LOG_TYPE"))
if logType != "event" && logType != "combined" {
return
}
fmt.Println(string(eventBytes))
}