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utils.go
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utils.go
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// Copyright 2022 CloudWeGo 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 tracing
import (
"errors"
"fmt"
"time"
"github.com/cloudwego/kitex/pkg/rpcinfo"
"github.com/cloudwego/kitex/pkg/stats"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/codes"
semconv "go.opentelemetry.io/otel/semconv/v1.12.0"
"go.opentelemetry.io/otel/trace"
)
// Ref to https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/trace/semantic_conventions/rpc.md#span-name
// naming rule: $package.$service/$method
func spanNaming(ri rpcinfo.RPCInfo) string {
if ri.Invocation().PackageName() != "" {
return ri.Invocation().PackageName() + "." + ri.Invocation().ServiceName() + "/" + ri.Invocation().MethodName()
}
return ri.Invocation().ServiceName() + "/" + ri.Invocation().MethodName()
}
// recordErrorSpanWithStack record error with stack
func recordErrorSpanWithStack(span trace.Span, err error, stackMessage, stackTrace string, attributes ...attribute.KeyValue) {
if span == nil {
return
}
// compatible with the case where error is empty
if err == nil {
err = errors.New(stackMessage)
}
// stack trace
attributes = append(attributes,
semconv.ExceptionStacktraceKey.String(stackTrace),
)
span.SetStatus(codes.Error, err.Error())
span.RecordError(
err,
trace.WithAttributes(attributes...),
)
}
func parseRPCError(ri rpcinfo.RPCInfo) (panicMsg, panicStack string, err error) {
panicked, panicErr := ri.Stats().Panicked()
if err = ri.Stats().Error(); err == nil && !panicked {
return
}
if panicked {
panicMsg = fmt.Sprintf("%v", panicErr)
if stackErr, ok := panicErr.(interface{ Stack() string }); ok {
panicStack = stackErr.Stack()
}
}
return
}
func handleErr(err error) {
if err != nil {
otel.Handle(err)
}
}
func getStartTimeOrNow(ri rpcinfo.RPCInfo) time.Time {
if event := ri.Stats().GetEvent(stats.RPCStart); event != nil {
return event.Time()
}
return time.Now()
}
func getEndTimeOrNow(ri rpcinfo.RPCInfo) time.Time {
if event := ri.Stats().GetEvent(stats.RPCFinish); event != nil {
return event.Time()
}
return time.Now()
}
func getServiceFromResourceAttributes(attrs []attribute.KeyValue) (serviceName, serviceNamespace, deploymentEnv string) {
for _, attr := range attrs {
switch attr.Key {
case semconv.ServiceNameKey:
serviceName = attr.Value.AsString()
case semconv.ServiceNamespaceKey:
serviceNamespace = attr.Value.AsString()
case semconv.DeploymentEnvironmentKey:
deploymentEnv = attr.Value.AsString()
}
}
return
}