VOL-3202: Include port capability in the port create message.
Change-Id: I7d8fbafb2db2834def1903f13a1af25eb57500e3
diff --git a/vendor/github.com/uber/jaeger-client-go/rpcmetrics/observer.go b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/observer.go
new file mode 100644
index 0000000..eca5ff6
--- /dev/null
+++ b/vendor/github.com/uber/jaeger-client-go/rpcmetrics/observer.go
@@ -0,0 +1,171 @@
+// 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
+
+import (
+ "strconv"
+ "sync"
+ "time"
+
+ "github.com/opentracing/opentracing-go"
+ "github.com/opentracing/opentracing-go/ext"
+ "github.com/uber/jaeger-lib/metrics"
+
+ jaeger "github.com/uber/jaeger-client-go"
+)
+
+const defaultMaxNumberOfEndpoints = 200
+
+// Observer is an observer that can emit RPC metrics.
+type Observer struct {
+ metricsByEndpoint *MetricsByEndpoint
+}
+
+// NewObserver creates a new observer that can emit RPC metrics.
+func NewObserver(metricsFactory metrics.Factory, normalizer NameNormalizer) *Observer {
+ return &Observer{
+ metricsByEndpoint: newMetricsByEndpoint(
+ metricsFactory,
+ normalizer,
+ defaultMaxNumberOfEndpoints,
+ ),
+ }
+}
+
+// OnStartSpan creates a new Observer for the span.
+func (o *Observer) OnStartSpan(
+ operationName string,
+ options opentracing.StartSpanOptions,
+) jaeger.SpanObserver {
+ return NewSpanObserver(o.metricsByEndpoint, operationName, options)
+}
+
+// SpanKind identifies the span as inboud, outbound, or internal
+type SpanKind int
+
+const (
+ // Local span kind
+ Local SpanKind = iota
+ // Inbound span kind
+ Inbound
+ // Outbound span kind
+ Outbound
+)
+
+// SpanObserver collects RPC metrics
+type SpanObserver struct {
+ metricsByEndpoint *MetricsByEndpoint
+ operationName string
+ startTime time.Time
+ mux sync.Mutex
+ kind SpanKind
+ httpStatusCode uint16
+ err bool
+}
+
+// NewSpanObserver creates a new SpanObserver that can emit RPC metrics.
+func NewSpanObserver(
+ metricsByEndpoint *MetricsByEndpoint,
+ operationName string,
+ options opentracing.StartSpanOptions,
+) *SpanObserver {
+ so := &SpanObserver{
+ metricsByEndpoint: metricsByEndpoint,
+ operationName: operationName,
+ startTime: options.StartTime,
+ }
+ for k, v := range options.Tags {
+ so.handleTagInLock(k, v)
+ }
+ return so
+}
+
+// handleTags watches for special tags
+// - SpanKind
+// - HttpStatusCode
+// - Error
+func (so *SpanObserver) handleTagInLock(key string, value interface{}) {
+ if key == string(ext.SpanKind) {
+ if v, ok := value.(ext.SpanKindEnum); ok {
+ value = string(v)
+ }
+ if v, ok := value.(string); ok {
+ if v == string(ext.SpanKindRPCClientEnum) {
+ so.kind = Outbound
+ } else if v == string(ext.SpanKindRPCServerEnum) {
+ so.kind = Inbound
+ }
+ }
+ return
+ }
+ if key == string(ext.HTTPStatusCode) {
+ if v, ok := value.(uint16); ok {
+ so.httpStatusCode = v
+ } else if v, ok := value.(int); ok {
+ so.httpStatusCode = uint16(v)
+ } else if v, ok := value.(string); ok {
+ if vv, err := strconv.Atoi(v); err == nil {
+ so.httpStatusCode = uint16(vv)
+ }
+ }
+ return
+ }
+ if key == string(ext.Error) {
+ if v, ok := value.(bool); ok {
+ so.err = v
+ } else if v, ok := value.(string); ok {
+ if vv, err := strconv.ParseBool(v); err == nil {
+ so.err = vv
+ }
+ }
+ return
+ }
+}
+
+// OnFinish emits the RPC metrics. It only has an effect when operation name
+// is not blank, and the span kind is an RPC server.
+func (so *SpanObserver) OnFinish(options opentracing.FinishOptions) {
+ so.mux.Lock()
+ defer so.mux.Unlock()
+
+ if so.operationName == "" || so.kind != Inbound {
+ return
+ }
+
+ mets := so.metricsByEndpoint.get(so.operationName)
+ latency := options.FinishTime.Sub(so.startTime)
+ if so.err {
+ mets.RequestCountFailures.Inc(1)
+ mets.RequestLatencyFailures.Record(latency)
+ } else {
+ mets.RequestCountSuccess.Inc(1)
+ mets.RequestLatencySuccess.Record(latency)
+ }
+ mets.recordHTTPStatusCode(so.httpStatusCode)
+}
+
+// OnSetOperationName records new operation name.
+func (so *SpanObserver) OnSetOperationName(operationName string) {
+ so.mux.Lock()
+ so.operationName = operationName
+ so.mux.Unlock()
+}
+
+// OnSetTag implements SpanObserver
+func (so *SpanObserver) OnSetTag(key string, value interface{}) {
+ so.mux.Lock()
+ so.handleTagInLock(key, value)
+ so.mux.Unlock()
+}