[VOL-3187]Pass Context down the execution call hierarchy across ofagent codebase
Change-Id: Ia5f2fa1509beefe0ddc427b83e39d2702782db8f
diff --git a/vendor/github.com/uber/jaeger-client-go/rpcmetrics/normalizer.go b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/normalizer.go
new file mode 100644
index 0000000..148d84b
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/normalizer.go
@@ -0,0 +1,101 @@
+// Copyright (c) 2017 Uber Technologies, 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 rpcmetrics
+
+// NameNormalizer is used to convert the endpoint names to strings
+// that can be safely used as tags in the metrics.
+type NameNormalizer interface {
+ Normalize(name string) string
+}
+
+// DefaultNameNormalizer converts endpoint names so that they contain only characters
+// from the safe charset [a-zA-Z0-9-./_]. All other characters are replaced with '-'.
+var DefaultNameNormalizer = &SimpleNameNormalizer{
+ SafeSets: []SafeCharacterSet{
+ &Range{From: 'a', To: 'z'},
+ &Range{From: 'A', To: 'Z'},
+ &Range{From: '0', To: '9'},
+ &Char{'-'},
+ &Char{'_'},
+ &Char{'/'},
+ &Char{'.'},
+ },
+ Replacement: '-',
+}
+
+// SimpleNameNormalizer uses a set of safe character sets.
+type SimpleNameNormalizer struct {
+ SafeSets []SafeCharacterSet
+ Replacement byte
+}
+
+// SafeCharacterSet determines if the given character is "safe"
+type SafeCharacterSet interface {
+ IsSafe(c byte) bool
+}
+
+// Range implements SafeCharacterSet
+type Range struct {
+ From, To byte
+}
+
+// IsSafe implements SafeCharacterSet
+func (r *Range) IsSafe(c byte) bool {
+ return c >= r.From && c <= r.To
+}
+
+// Char implements SafeCharacterSet
+type Char struct {
+ Val byte
+}
+
+// IsSafe implements SafeCharacterSet
+func (ch *Char) IsSafe(c byte) bool {
+ return c == ch.Val
+}
+
+// Normalize checks each character in the string against SafeSets,
+// and if it's not safe substitutes it with Replacement.
+func (n *SimpleNameNormalizer) Normalize(name string) string {
+ var retMe []byte
+ nameBytes := []byte(name)
+ for i, b := range nameBytes {
+ if n.safeByte(b) {
+ if retMe != nil {
+ retMe[i] = b
+ }
+ } else {
+ if retMe == nil {
+ retMe = make([]byte, len(nameBytes))
+ copy(retMe[0:i], nameBytes[0:i])
+ }
+ retMe[i] = n.Replacement
+ }
+ }
+ if retMe == nil {
+ return name
+ }
+ return string(retMe)
+}
+
+// safeByte checks if b against all safe charsets.
+func (n *SimpleNameNormalizer) safeByte(b byte) bool {
+ for i := range n.SafeSets {
+ if n.SafeSets[i].IsSafe(b) {
+ return true
+ }
+ }
+ return false
+}