Dependencies for the affinity router and the
affinity routing daemon.
Change-Id: Icda72c3594ef7f8f0bc0c33dc03087a4c25529ca
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/labels.go b/vendor/github.com/prometheus/client_golang/prometheus/labels.go
new file mode 100644
index 0000000..2744443
--- /dev/null
+++ b/vendor/github.com/prometheus/client_golang/prometheus/labels.go
@@ -0,0 +1,87 @@
+// Copyright 2018 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 prometheus
+
+import (
+ "errors"
+ "fmt"
+ "strings"
+ "unicode/utf8"
+
+ "github.com/prometheus/common/model"
+)
+
+// Labels represents a collection of label name -> value mappings. This type is
+// commonly used with the With(Labels) and GetMetricWith(Labels) methods of
+// metric vector Collectors, e.g.:
+// myVec.With(Labels{"code": "404", "method": "GET"}).Add(42)
+//
+// The other use-case is the specification of constant label pairs in Opts or to
+// create a Desc.
+type Labels map[string]string
+
+// reservedLabelPrefix is a prefix which is not legal in user-supplied
+// label names.
+const reservedLabelPrefix = "__"
+
+var errInconsistentCardinality = errors.New("inconsistent label cardinality")
+
+func makeInconsistentCardinalityError(fqName string, labels, labelValues []string) error {
+ return fmt.Errorf(
+ "%s: %q has %d variable labels named %q but %d values %q were provided",
+ errInconsistentCardinality, fqName,
+ len(labels), labels,
+ len(labelValues), labelValues,
+ )
+}
+
+func validateValuesInLabels(labels Labels, expectedNumberOfValues int) error {
+ if len(labels) != expectedNumberOfValues {
+ return fmt.Errorf(
+ "%s: expected %d label values but got %d in %#v",
+ errInconsistentCardinality, expectedNumberOfValues,
+ len(labels), labels,
+ )
+ }
+
+ for name, val := range labels {
+ if !utf8.ValidString(val) {
+ return fmt.Errorf("label %s: value %q is not valid UTF-8", name, val)
+ }
+ }
+
+ return nil
+}
+
+func validateLabelValues(vals []string, expectedNumberOfValues int) error {
+ if len(vals) != expectedNumberOfValues {
+ return fmt.Errorf(
+ "%s: expected %d label values but got %d in %#v",
+ errInconsistentCardinality, expectedNumberOfValues,
+ len(vals), vals,
+ )
+ }
+
+ for _, val := range vals {
+ if !utf8.ValidString(val) {
+ return fmt.Errorf("label value %q is not valid UTF-8", val)
+ }
+ }
+
+ return nil
+}
+
+func checkLabelName(l string) bool {
+ return model.LabelName(l).IsValid() && !strings.HasPrefix(l, reservedLabelPrefix)
+}