implement klog wrapper

Signed-off-by: Daniel-Pivonka <dpivonka@redhat.com>

pkg/util/log.go

@@ -0,0 +1,151 @@
+/*
+Copyright 2019 The Ceph-CSI Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package util
+
+import (
+	"context"
+	"fmt"
+
+	"k8s.io/klog"
+)
+
+type Verbosity struct {
+	level int
+}
+
+func V(i int) *Verbosity {
+	return &Verbosity{level: i}
+}
+
+type contextKey string
+
+var Key = contextKey("ID")
+
+var id = "ID: %d "
+
+// INFO
+func (v *Verbosity) Infof(ctx context.Context, format string, args ...interface{}) {
+	format = id + format
+	args = append([]interface{}{ctx.Value(Key)}, args...)
+	klog.V(klog.Level(v.level)).Infof(format, args...)
+}
+
+func Infof(ctx context.Context, format string, args ...interface{}) {
+	format = id + format
+	args = append([]interface{}{ctx.Value(Key)}, args...)
+	klog.Infof(format, args...)
+}
+
+func (v *Verbosity) Info(ctx context.Context, args ...interface{}) {
+	idString := fmt.Sprintf(id, ctx.Value(Key))
+	args = append([]interface{}{idString}, args...)
+	klog.V(klog.Level(v.level)).Info(args...)
+}
+
+func Info(ctx context.Context, args ...interface{}) {
+	idString := fmt.Sprintf(id, ctx.Value(Key))
+	args = append([]interface{}{idString}, args...)
+	klog.Info(args...)
+}
+
+func (v *Verbosity) Infoln(ctx context.Context, args ...interface{}) {
+	idString := fmt.Sprintf("ID: %d", ctx.Value(Key))
+	args = append([]interface{}{idString}, args...)
+	klog.V(klog.Level(v.level)).Infoln(args...)
+}
+
+func Infoln(ctx context.Context, args ...interface{}) {
+	idString := fmt.Sprintf("ID: %d", ctx.Value(Key))
+	args = append([]interface{}{idString}, args...)
+	klog.Infoln(args...)
+}
+
+// WARNING
+func Warningf(ctx context.Context, format string, args ...interface{}) {
+	format = id + format
+	args = append([]interface{}{ctx.Value(Key)}, args...)
+	klog.Warningf(format, args...)
+}
+
+func Warning(ctx context.Context, args ...interface{}) {
+	idString := fmt.Sprintf(id, ctx.Value(Key))
+	args = append([]interface{}{idString}, args...)
+	klog.Warning(args...)
+}
+
+func Warningln(ctx context.Context, args ...interface{}) {
+	idString := fmt.Sprintf("ID: %d", ctx.Value(Key))
+	args = append([]interface{}{idString}, args...)
+	klog.Warningln(args...)
+}
+
+// ERROR
+func Errorf(ctx context.Context, format string, args ...interface{}) {
+	format = id + format
+	args = append([]interface{}{ctx.Value(Key)}, args...)
+	klog.Errorf(format, args...)
+}
+
+func Error(ctx context.Context, args ...interface{}) {
+	idString := fmt.Sprintf(id, ctx.Value(Key))
+	args = append([]interface{}{idString}, args...)
+	klog.Error(args...)
+}
+
+func Errorln(ctx context.Context, args ...interface{}) {
+	idString := fmt.Sprintf("ID: %d", ctx.Value(Key))
+	args = append([]interface{}{idString}, args...)
+	klog.Errorln(args...)
+}
+
+// FATAL
+func Fatalf(ctx context.Context, format string, args ...interface{}) {
+	format = id + format
+	args = append([]interface{}{ctx.Value(Key)}, args...)
+	klog.Fatalf(format, args...)
+}
+
+func Fatal(ctx context.Context, args ...interface{}) {
+	idString := fmt.Sprintf(id, ctx.Value(Key))
+	args = append([]interface{}{idString}, args...)
+	klog.Fatal(args...)
+}
+
+func Fatalln(ctx context.Context, args ...interface{}) {
+	idString := fmt.Sprintf("ID: %d", ctx.Value(Key))
+	args = append([]interface{}{idString}, args...)
+	klog.Fatalln(args...)
+}
+
+// EXIT
+func Exitf(ctx context.Context, format string, args ...interface{}) {
+	format = id + format
+	args = append([]interface{}{ctx.Value(Key)}, args...)
+	klog.Exitf(format, args...)
+}
+
+func Exit(ctx context.Context, args ...interface{}) {
+	idString := fmt.Sprintf(id, ctx.Value(Key))
+	args = append([]interface{}{idString}, args...)
+	klog.Exit(args...)
+}
+
+func Exitln(ctx context.Context, args ...interface{}) {
+	idString := fmt.Sprintf("ID: %d", ctx.Value(Key))
+	args = append([]interface{}{idString}, args...)
+	klog.Exitln(args...)
+}