[VOL-2538] Logging - Implement dynamic log levels in ofagent
Change-Id: I9582230d9d3c34ea84339fddf2b2f3b3d2804808
diff --git a/vendor/github.com/coreos/pkg/capnslog/formatters.go b/vendor/github.com/coreos/pkg/capnslog/formatters.go
new file mode 100644
index 0000000..b305a84
--- /dev/null
+++ b/vendor/github.com/coreos/pkg/capnslog/formatters.go
@@ -0,0 +1,157 @@
+// Copyright 2015 CoreOS, Inc.
+//
+// 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 capnslog
+
+import (
+ "bufio"
+ "fmt"
+ "io"
+ "log"
+ "runtime"
+ "strings"
+ "time"
+)
+
+type Formatter interface {
+ Format(pkg string, level LogLevel, depth int, entries ...interface{})
+ Flush()
+}
+
+func NewStringFormatter(w io.Writer) Formatter {
+ return &StringFormatter{
+ w: bufio.NewWriter(w),
+ }
+}
+
+type StringFormatter struct {
+ w *bufio.Writer
+}
+
+func (s *StringFormatter) Format(pkg string, l LogLevel, i int, entries ...interface{}) {
+ now := time.Now().UTC()
+ s.w.WriteString(now.Format(time.RFC3339))
+ s.w.WriteByte(' ')
+ writeEntries(s.w, pkg, l, i, entries...)
+ s.Flush()
+}
+
+func writeEntries(w *bufio.Writer, pkg string, _ LogLevel, _ int, entries ...interface{}) {
+ if pkg != "" {
+ w.WriteString(pkg + ": ")
+ }
+ str := fmt.Sprint(entries...)
+ endsInNL := strings.HasSuffix(str, "\n")
+ w.WriteString(str)
+ if !endsInNL {
+ w.WriteString("\n")
+ }
+}
+
+func (s *StringFormatter) Flush() {
+ s.w.Flush()
+}
+
+func NewPrettyFormatter(w io.Writer, debug bool) Formatter {
+ return &PrettyFormatter{
+ w: bufio.NewWriter(w),
+ debug: debug,
+ }
+}
+
+type PrettyFormatter struct {
+ w *bufio.Writer
+ debug bool
+}
+
+func (c *PrettyFormatter) Format(pkg string, l LogLevel, depth int, entries ...interface{}) {
+ now := time.Now()
+ ts := now.Format("2006-01-02 15:04:05")
+ c.w.WriteString(ts)
+ ms := now.Nanosecond() / 1000
+ c.w.WriteString(fmt.Sprintf(".%06d", ms))
+ if c.debug {
+ _, file, line, ok := runtime.Caller(depth) // It's always the same number of frames to the user's call.
+ if !ok {
+ file = "???"
+ line = 1
+ } else {
+ slash := strings.LastIndex(file, "/")
+ if slash >= 0 {
+ file = file[slash+1:]
+ }
+ }
+ if line < 0 {
+ line = 0 // not a real line number
+ }
+ c.w.WriteString(fmt.Sprintf(" [%s:%d]", file, line))
+ }
+ c.w.WriteString(fmt.Sprint(" ", l.Char(), " | "))
+ writeEntries(c.w, pkg, l, depth, entries...)
+ c.Flush()
+}
+
+func (c *PrettyFormatter) Flush() {
+ c.w.Flush()
+}
+
+// LogFormatter emulates the form of the traditional built-in logger.
+type LogFormatter struct {
+ logger *log.Logger
+ prefix string
+}
+
+// NewLogFormatter is a helper to produce a new LogFormatter struct. It uses the
+// golang log package to actually do the logging work so that logs look similar.
+func NewLogFormatter(w io.Writer, prefix string, flag int) Formatter {
+ return &LogFormatter{
+ logger: log.New(w, "", flag), // don't use prefix here
+ prefix: prefix, // save it instead
+ }
+}
+
+// Format builds a log message for the LogFormatter. The LogLevel is ignored.
+func (lf *LogFormatter) Format(pkg string, _ LogLevel, _ int, entries ...interface{}) {
+ str := fmt.Sprint(entries...)
+ prefix := lf.prefix
+ if pkg != "" {
+ prefix = fmt.Sprintf("%s%s: ", prefix, pkg)
+ }
+ lf.logger.Output(5, fmt.Sprintf("%s%v", prefix, str)) // call depth is 5
+}
+
+// Flush is included so that the interface is complete, but is a no-op.
+func (lf *LogFormatter) Flush() {
+ // noop
+}
+
+// NilFormatter is a no-op log formatter that does nothing.
+type NilFormatter struct {
+}
+
+// NewNilFormatter is a helper to produce a new LogFormatter struct. It logs no
+// messages so that you can cause part of your logging to be silent.
+func NewNilFormatter() Formatter {
+ return &NilFormatter{}
+}
+
+// Format does nothing.
+func (_ *NilFormatter) Format(_ string, _ LogLevel, _ int, _ ...interface{}) {
+ // noop
+}
+
+// Flush is included so that the interface is complete, but is a no-op.
+func (_ *NilFormatter) Flush() {
+ // noop
+}