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logger.go
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logger.go
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package logger
import (
"fmt"
"os"
"time"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
)
var (
Log *zap.Logger
Debug = os.Getenv("DEBUG")
)
func init() {
Log, _ = Setup(true)
defer Log.Sync()
}
// configure will return instance of zap logger configuration, configured to be verbose or to use JSON formatting
func Setup(verbose bool) (logger *zap.Logger, err error) {
level := zapcore.InfoLevel
if verbose {
level = zapcore.DebugLevel
}
config := zap.Config{
Level: zap.NewAtomicLevelAt(level),
Development: false,
DisableCaller: false,
DisableStacktrace: false,
Sampling: nil,
Encoding: "console",
EncoderConfig: zapcore.EncoderConfig{
MessageKey: "message",
LevelKey: "level",
TimeKey: "time",
NameKey: "logger",
CallerKey: "go",
StacktraceKey: "trace",
LineEnding: "\n",
EncodeLevel: zapcore.CapitalColorLevelEncoder,
// EncodeTime: zapcore.ISO8601TimeEncoder,
EncodeTime: func(t time.Time, enc zapcore.PrimitiveArrayEncoder) {
now := time.Now()
out := now.Format("02.01.2006 15:04:05.99")
out = fmt.Sprintf("[ %s ]", out)
enc.AppendString(out)
},
EncodeDuration: zapcore.StringDurationEncoder,
EncodeCaller: func(caller zapcore.EntryCaller, enc zapcore.PrimitiveArrayEncoder) {
callerName := caller.TrimmedPath()
callerName = minWidth(callerName, " ", 20)
enc.AppendString(callerName)
},
EncodeName: zapcore.FullNameEncoder,
},
OutputPaths: []string{"stdout"},
ErrorOutputPaths: nil,
InitialFields: nil,
}
return config.Build()
}
const (
fileLoc = "logs/queries.log"
)
var (
queue = make(chan string, 1024)
)
func init() {
go func() {
for {
flushQueue()
time.Sleep(3 * time.Second)
}
}()
}
// Enqueue sets message for writing to disk
func Enqueue(msg string) {
select {
case queue <- msg:
case <-time.After(1 * time.Millisecond):
flushQueue()
queue <- msg
}
}
func flushQueue() {
f, err := os.OpenFile(fileLoc, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
return
}
defer f.Close()
for len(queue) > 0 {
msg := <-queue
f.WriteString(msg + "\n")
}
}
func File(fileLoc string, data string) (err error) {
f, err := os.OpenFile(fileLoc, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
return
}
defer f.Close()
_, err = f.WriteString(data)
return
}