/
zap.go
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/
zap.go
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package logging
import (
"sync"
"time"
"github.com/go-kit/log"
"github.com/go-kit/log/level"
"go.uber.org/zap/zapcore"
)
// objectEncoder is an ObjectEncoder backed by a memory array inspired by
// https://github.com/uber-go/zap/blob/6f34060764b5ea1367eecda380ba8a9a0de3f0e6/zapcore/memory_encoder.go#L28.
type objectEncoder struct {
// fields contains the entire encoded log context.
fields []interface{}
// Current namespace.
currNs string
}
// AddArray implements ObjectEncoder.
func (m *objectEncoder) AddArray(key string, v zapcore.ArrayMarshaler) error {
arr := &sliceArrayEncoder{elems: make([]interface{}, 0)}
if err := v.MarshalLogArray(arr); err != nil {
return err
}
m.fields = append(m.fields, key, arr.elems)
return nil
}
// AddObject implements ObjectEncoder.
func (m *objectEncoder) AddObject(k string, v zapcore.ObjectMarshaler) error {
newMap := &objectEncoder{}
if err := v.MarshalLogObject(newMap); err != nil {
return err
}
m.fields = append(m.fields, m.namespaced(k), newMap.fields)
return nil
}
// AddBinary implements ObjectEncoder.
func (m *objectEncoder) AddBinary(k string, v []byte) {
m.fields = append(m.fields, m.namespaced(k), v)
}
// AddByteString implements ObjectEncoder.
func (m *objectEncoder) AddByteString(k string, v []byte) {
m.fields = append(m.fields, m.namespaced(k), string(v))
}
// AddBool implements ObjectEncoder.
func (m *objectEncoder) AddBool(k string, v bool) { m.fields = append(m.fields, m.namespaced(k), v) }
// AddDuration implements ObjectEncoder.
func (m *objectEncoder) AddDuration(k string, v time.Duration) {
m.fields = append(m.fields, m.namespaced(k), v)
}
// AddComplex128 implements ObjectEncoder.
func (m *objectEncoder) AddComplex128(k string, v complex128) {
m.fields = append(m.fields, m.namespaced(k), v)
}
// AddComplex64 implements ObjectEncoder.
func (m *objectEncoder) AddComplex64(k string, v complex64) {
m.fields = append(m.fields, m.namespaced(k), v)
}
// AddFloat64 implements ObjectEncoder.
func (m *objectEncoder) AddFloat64(k string, v float64) {
m.fields = append(m.fields, m.namespaced(k), v)
}
// AddFloat32 implements ObjectEncoder.
func (m *objectEncoder) AddFloat32(k string, v float32) {
m.fields = append(m.fields, m.namespaced(k), v)
}
// AddInt implements ObjectEncoder.
func (m *objectEncoder) AddInt(k string, v int) { m.fields = append(m.fields, m.namespaced(k), v) }
// AddInt64 implements ObjectEncoder.
func (m *objectEncoder) AddInt64(k string, v int64) { m.fields = append(m.fields, m.namespaced(k), v) }
// AddInt32 implements ObjectEncoder.
func (m *objectEncoder) AddInt32(k string, v int32) { m.fields = append(m.fields, m.namespaced(k), v) }
// AddInt16 implements ObjectEncoder.
func (m *objectEncoder) AddInt16(k string, v int16) { m.fields = append(m.fields, m.namespaced(k), v) }
// AddInt8 implements ObjectEncoder.
func (m *objectEncoder) AddInt8(k string, v int8) { m.fields = append(m.fields, m.namespaced(k), v) }
// AddString implements ObjectEncoder.
func (m *objectEncoder) AddString(k string, v string) {
m.fields = append(m.fields, m.namespaced(k), v)
}
// AddTime implements ObjectEncoder.
func (m *objectEncoder) AddTime(k string, v time.Time) {
m.fields = append(m.fields, m.namespaced(k), v)
}
// AddUint implements ObjectEncoder.
func (m *objectEncoder) AddUint(k string, v uint) { m.fields = append(m.fields, m.namespaced(k), v) }
// AddUint64 implements ObjectEncoder.
func (m *objectEncoder) AddUint64(k string, v uint64) {
m.fields = append(m.fields, m.namespaced(k), v)
}
// AddUint32 implements ObjectEncoder.
func (m *objectEncoder) AddUint32(k string, v uint32) {
m.fields = append(m.fields, m.namespaced(k), v)
}
// AddUint16 implements ObjectEncoder.
func (m *objectEncoder) AddUint16(k string, v uint16) {
m.fields = append(m.fields, m.namespaced(k), v)
}
// AddUint8 implements ObjectEncoder.
func (m *objectEncoder) AddUint8(k string, v uint8) { m.fields = append(m.fields, m.namespaced(k), v) }
// AddUintptr implements ObjectEncoder.
func (m *objectEncoder) AddUintptr(k string, v uintptr) {
m.fields = append(m.fields, m.namespaced(k), v)
}
// AddReflected implements ObjectEncoder.
func (m *objectEncoder) AddReflected(k string, v interface{}) error {
m.fields = append(m.fields, m.namespaced(k), v)
return nil
}
// OpenNamespace implements ObjectEncoder.
func (m *objectEncoder) OpenNamespace(k string) {
if m.currNs == "" {
m.currNs = k
} else {
m.currNs += "_" + k
}
}
func (m *objectEncoder) namespaced(k string) string {
if m.currNs == "" {
return k
}
return m.currNs + "_" + k
}
// sliceArrayEncoder is an ArrayEncoder backed by a simple []interface{}.
type sliceArrayEncoder struct {
elems []interface{}
}
func (s *sliceArrayEncoder) AppendArray(v zapcore.ArrayMarshaler) error {
enc := &sliceArrayEncoder{}
err := v.MarshalLogArray(enc)
s.elems = append(s.elems, enc.elems)
return err
}
func (s *sliceArrayEncoder) AppendObject(v zapcore.ObjectMarshaler) error {
m := &objectEncoder{}
err := v.MarshalLogObject(m)
s.elems = append(s.elems, m.fields)
return err
}
func (s *sliceArrayEncoder) AppendReflected(v interface{}) error {
s.elems = append(s.elems, v)
return nil
}
func (s *sliceArrayEncoder) AppendBool(v bool) { s.elems = append(s.elems, v) }
func (s *sliceArrayEncoder) AppendByteString(v []byte) { s.elems = append(s.elems, string(v)) }
func (s *sliceArrayEncoder) AppendComplex128(v complex128) { s.elems = append(s.elems, v) }
func (s *sliceArrayEncoder) AppendComplex64(v complex64) { s.elems = append(s.elems, v) }
func (s *sliceArrayEncoder) AppendDuration(v time.Duration) { s.elems = append(s.elems, v) }
func (s *sliceArrayEncoder) AppendFloat64(v float64) { s.elems = append(s.elems, v) }
func (s *sliceArrayEncoder) AppendFloat32(v float32) { s.elems = append(s.elems, v) }
func (s *sliceArrayEncoder) AppendInt(v int) { s.elems = append(s.elems, v) }
func (s *sliceArrayEncoder) AppendInt64(v int64) { s.elems = append(s.elems, v) }
func (s *sliceArrayEncoder) AppendInt32(v int32) { s.elems = append(s.elems, v) }
func (s *sliceArrayEncoder) AppendInt16(v int16) { s.elems = append(s.elems, v) }
func (s *sliceArrayEncoder) AppendInt8(v int8) { s.elems = append(s.elems, v) }
func (s *sliceArrayEncoder) AppendString(v string) { s.elems = append(s.elems, v) }
func (s *sliceArrayEncoder) AppendTime(v time.Time) { s.elems = append(s.elems, v) }
func (s *sliceArrayEncoder) AppendUint(v uint) { s.elems = append(s.elems, v) }
func (s *sliceArrayEncoder) AppendUint64(v uint64) { s.elems = append(s.elems, v) }
func (s *sliceArrayEncoder) AppendUint32(v uint32) { s.elems = append(s.elems, v) }
func (s *sliceArrayEncoder) AppendUint16(v uint16) { s.elems = append(s.elems, v) }
func (s *sliceArrayEncoder) AppendUint8(v uint8) { s.elems = append(s.elems, v) }
func (s *sliceArrayEncoder) AppendUintptr(v uintptr) { s.elems = append(s.elems, v) }
type zapCore struct {
logger *Logger
modulePrefix string
sync.Mutex
encoder *objectEncoder
}
func newZapCore(logger log.Logger, module string, unwind int) *zapCore {
log := &Logger{
logger: log.WithPrefix(logger, "module", module, "caller", log.Caller(unwind)),
module: module,
}
return &zapCore{
logger: log,
modulePrefix: module + ":",
encoder: &objectEncoder{},
}
}
// Implements zapcore.LevelEnabler.
func (l *zapCore) Enabled(level zapcore.Level) bool {
switch level {
case zapcore.DebugLevel:
return l.logger.level <= LevelDebug
case zapcore.InfoLevel:
return l.logger.level <= LevelInfo
case zapcore.WarnLevel:
return l.logger.level <= LevelWarn
case zapcore.ErrorLevel:
return l.logger.level <= LevelError
default:
// DPanic, Panic, Fatal levels..
return l.logger.level <= LevelError
}
}
// Implements zapcore.Core.
func (l *zapCore) With(fields []zapcore.Field) zapcore.Core {
l.Lock()
defer l.Unlock()
for _, field := range fields {
field.AddTo(l.encoder)
}
l.logger = l.logger.With(l.encoder.fields...)
return l
}
// Implements zapcore.Core.
func (l *zapCore) Check(e zapcore.Entry, ce *zapcore.CheckedEntry) *zapcore.CheckedEntry {
if !l.Enabled(e.Level) {
return nil
}
return ce.AddCore(e, l)
}
// Implements zapcore.Core.
func (l *zapCore) Write(e zapcore.Entry, fields []zapcore.Field) error {
encoder := &objectEncoder{}
for _, field := range fields {
field.AddTo(encoder)
}
keyvals := append([]interface{}{"msg", e.Message, "module", l.modulePrefix + e.LoggerName}, encoder.fields...)
switch e.Level {
case zapcore.DebugLevel:
_ = level.Debug(l.logger.logger).Log(keyvals...)
case zapcore.InfoLevel:
_ = level.Info(l.logger.logger).Log(keyvals...)
case zapcore.WarnLevel:
_ = level.Warn(l.logger.logger).Log(keyvals...)
default:
_ = level.Error(l.logger.logger).Log(keyvals...)
}
return nil
}
// Implements zapcore.Core.
func (l *zapCore) Sync() error {
return nil
}