Enable grpc stats
Change-Id: I6a5f617510d33f1750b1aaea88d02df3ff78bb7a
Signed-off-by: Abhay Kumar <abhay.kumar@radisys.com>
diff --git a/vendor/github.com/prometheus/common/model/time.go b/vendor/github.com/prometheus/common/model/time.go
new file mode 100644
index 0000000..1730b0f
--- /dev/null
+++ b/vendor/github.com/prometheus/common/model/time.go
@@ -0,0 +1,359 @@
+// Copyright 2013 The Prometheus 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 model
+
+import (
+ "encoding/json"
+ "errors"
+ "fmt"
+ "math"
+ "strconv"
+ "strings"
+ "time"
+)
+
+const (
+ // MinimumTick is the minimum supported time resolution. This has to be
+ // at least time.Second in order for the code below to work.
+ minimumTick = time.Millisecond
+ // second is the Time duration equivalent to one second.
+ second = int64(time.Second / minimumTick)
+ // The number of nanoseconds per minimum tick.
+ nanosPerTick = int64(minimumTick / time.Nanosecond)
+
+ // Earliest is the earliest Time representable. Handy for
+ // initializing a high watermark.
+ Earliest = Time(math.MinInt64)
+ // Latest is the latest Time representable. Handy for initializing
+ // a low watermark.
+ Latest = Time(math.MaxInt64)
+)
+
+// Time is the number of milliseconds since the epoch
+// (1970-01-01 00:00 UTC) excluding leap seconds.
+type Time int64
+
+// Interval describes an interval between two timestamps.
+type Interval struct {
+ Start, End Time
+}
+
+// Now returns the current time as a Time.
+func Now() Time {
+ return TimeFromUnixNano(time.Now().UnixNano())
+}
+
+// TimeFromUnix returns the Time equivalent to the Unix Time t
+// provided in seconds.
+func TimeFromUnix(t int64) Time {
+ return Time(t * second)
+}
+
+// TimeFromUnixNano returns the Time equivalent to the Unix Time
+// t provided in nanoseconds.
+func TimeFromUnixNano(t int64) Time {
+ return Time(t / nanosPerTick)
+}
+
+// Equal reports whether two Times represent the same instant.
+func (t Time) Equal(o Time) bool {
+ return t == o
+}
+
+// Before reports whether the Time t is before o.
+func (t Time) Before(o Time) bool {
+ return t < o
+}
+
+// After reports whether the Time t is after o.
+func (t Time) After(o Time) bool {
+ return t > o
+}
+
+// Add returns the Time t + d.
+func (t Time) Add(d time.Duration) Time {
+ return t + Time(d/minimumTick)
+}
+
+// Sub returns the Duration t - o.
+func (t Time) Sub(o Time) time.Duration {
+ return time.Duration(t-o) * minimumTick
+}
+
+// Time returns the time.Time representation of t.
+func (t Time) Time() time.Time {
+ return time.Unix(int64(t)/second, (int64(t)%second)*nanosPerTick)
+}
+
+// Unix returns t as a Unix time, the number of seconds elapsed
+// since January 1, 1970 UTC.
+func (t Time) Unix() int64 {
+ return int64(t) / second
+}
+
+// UnixNano returns t as a Unix time, the number of nanoseconds elapsed
+// since January 1, 1970 UTC.
+func (t Time) UnixNano() int64 {
+ return int64(t) * nanosPerTick
+}
+
+// The number of digits after the dot.
+var dotPrecision = int(math.Log10(float64(second)))
+
+// String returns a string representation of the Time.
+func (t Time) String() string {
+ return strconv.FormatFloat(float64(t)/float64(second), 'f', -1, 64)
+}
+
+// MarshalJSON implements the json.Marshaler interface.
+func (t Time) MarshalJSON() ([]byte, error) {
+ return []byte(t.String()), nil
+}
+
+// UnmarshalJSON implements the json.Unmarshaler interface.
+func (t *Time) UnmarshalJSON(b []byte) error {
+ p := strings.Split(string(b), ".")
+ switch len(p) {
+ case 1:
+ v, err := strconv.ParseInt(p[0], 10, 64)
+ if err != nil {
+ return err
+ }
+ *t = Time(v * second)
+
+ case 2:
+ v, err := strconv.ParseInt(p[0], 10, 64)
+ if err != nil {
+ return err
+ }
+ v *= second
+
+ prec := dotPrecision - len(p[1])
+ if prec < 0 {
+ p[1] = p[1][:dotPrecision]
+ } else if prec > 0 {
+ p[1] += strings.Repeat("0", prec)
+ }
+
+ va, err := strconv.ParseInt(p[1], 10, 32)
+ if err != nil {
+ return err
+ }
+
+ // If the value was something like -0.1 the negative is lost in the
+ // parsing because of the leading zero, this ensures that we capture it.
+ if len(p[0]) > 0 && p[0][0] == '-' && v+va > 0 {
+ *t = Time(v+va) * -1
+ } else {
+ *t = Time(v + va)
+ }
+
+ default:
+ return fmt.Errorf("invalid time %q", string(b))
+ }
+ return nil
+}
+
+// Duration wraps time.Duration. It is used to parse the custom duration format
+// from YAML.
+// This type should not propagate beyond the scope of input/output processing.
+type Duration time.Duration
+
+// Set implements pflag/flag.Value.
+func (d *Duration) Set(s string) error {
+ var err error
+ *d, err = ParseDuration(s)
+ return err
+}
+
+// Type implements pflag.Value.
+func (*Duration) Type() string {
+ return "duration"
+}
+
+func isdigit(c byte) bool { return c >= '0' && c <= '9' }
+
+// Units are required to go in order from biggest to smallest.
+// This guards against confusion from "1m1d" being 1 minute + 1 day, not 1 month + 1 day.
+var unitMap = map[string]struct {
+ pos int
+ mult uint64
+}{
+ "ms": {7, uint64(time.Millisecond)},
+ "s": {6, uint64(time.Second)},
+ "m": {5, uint64(time.Minute)},
+ "h": {4, uint64(time.Hour)},
+ "d": {3, uint64(24 * time.Hour)},
+ "w": {2, uint64(7 * 24 * time.Hour)},
+ "y": {1, uint64(365 * 24 * time.Hour)},
+}
+
+// ParseDuration parses a string into a time.Duration, assuming that a year
+// always has 365d, a week always has 7d, and a day always has 24h.
+// Negative durations are not supported.
+func ParseDuration(s string) (Duration, error) {
+ switch s {
+ case "0":
+ // Allow 0 without a unit.
+ return 0, nil
+ case "":
+ return 0, errors.New("empty duration string")
+ }
+
+ orig := s
+ var dur uint64
+ lastUnitPos := 0
+
+ for s != "" {
+ if !isdigit(s[0]) {
+ return 0, fmt.Errorf("not a valid duration string: %q", orig)
+ }
+ // Consume [0-9]*
+ i := 0
+ for ; i < len(s) && isdigit(s[i]); i++ {
+ }
+ v, err := strconv.ParseUint(s[:i], 10, 0)
+ if err != nil {
+ return 0, fmt.Errorf("not a valid duration string: %q", orig)
+ }
+ s = s[i:]
+
+ // Consume unit.
+ for i = 0; i < len(s) && !isdigit(s[i]); i++ {
+ }
+ if i == 0 {
+ return 0, fmt.Errorf("not a valid duration string: %q", orig)
+ }
+ u := s[:i]
+ s = s[i:]
+ unit, ok := unitMap[u]
+ if !ok {
+ return 0, fmt.Errorf("unknown unit %q in duration %q", u, orig)
+ }
+ if unit.pos <= lastUnitPos { // Units must go in order from biggest to smallest.
+ return 0, fmt.Errorf("not a valid duration string: %q", orig)
+ }
+ lastUnitPos = unit.pos
+ // Check if the provided duration overflows time.Duration (> ~ 290years).
+ if v > 1<<63/unit.mult {
+ return 0, errors.New("duration out of range")
+ }
+ dur += v * unit.mult
+ if dur > 1<<63-1 {
+ return 0, errors.New("duration out of range")
+ }
+ }
+
+ return Duration(dur), nil
+}
+
+// ParseDurationAllowNegative is like ParseDuration but also accepts negative durations.
+func ParseDurationAllowNegative(s string) (Duration, error) {
+ if s == "" || s[0] != '-' {
+ return ParseDuration(s)
+ }
+
+ d, err := ParseDuration(s[1:])
+
+ return -d, err
+}
+
+func (d Duration) String() string {
+ var (
+ ms = int64(time.Duration(d) / time.Millisecond)
+ r = ""
+ sign = ""
+ )
+
+ if ms == 0 {
+ return "0s"
+ }
+
+ if ms < 0 {
+ sign, ms = "-", -ms
+ }
+
+ f := func(unit string, mult int64, exact bool) {
+ if exact && ms%mult != 0 {
+ return
+ }
+ if v := ms / mult; v > 0 {
+ r += fmt.Sprintf("%d%s", v, unit)
+ ms -= v * mult
+ }
+ }
+
+ // Only format years and weeks if the remainder is zero, as it is often
+ // easier to read 90d than 12w6d.
+ f("y", 1000*60*60*24*365, true)
+ f("w", 1000*60*60*24*7, true)
+
+ f("d", 1000*60*60*24, false)
+ f("h", 1000*60*60, false)
+ f("m", 1000*60, false)
+ f("s", 1000, false)
+ f("ms", 1, false)
+
+ return sign + r
+}
+
+// MarshalJSON implements the json.Marshaler interface.
+func (d Duration) MarshalJSON() ([]byte, error) {
+ return json.Marshal(d.String())
+}
+
+// UnmarshalJSON implements the json.Unmarshaler interface.
+func (d *Duration) UnmarshalJSON(bytes []byte) error {
+ var s string
+ if err := json.Unmarshal(bytes, &s); err != nil {
+ return err
+ }
+ dur, err := ParseDuration(s)
+ if err != nil {
+ return err
+ }
+ *d = dur
+ return nil
+}
+
+// MarshalText implements the encoding.TextMarshaler interface.
+func (d *Duration) MarshalText() ([]byte, error) {
+ return []byte(d.String()), nil
+}
+
+// UnmarshalText implements the encoding.TextUnmarshaler interface.
+func (d *Duration) UnmarshalText(text []byte) error {
+ var err error
+ *d, err = ParseDuration(string(text))
+ return err
+}
+
+// MarshalYAML implements the yaml.Marshaler interface.
+func (d Duration) MarshalYAML() (interface{}, error) {
+ return d.String(), nil
+}
+
+// UnmarshalYAML implements the yaml.Unmarshaler interface.
+func (d *Duration) UnmarshalYAML(unmarshal func(interface{}) error) error {
+ var s string
+ if err := unmarshal(&s); err != nil {
+ return err
+ }
+ dur, err := ParseDuration(s)
+ if err != nil {
+ return err
+ }
+ *d = dur
+ return nil
+}