/
translator.go
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/
translator.go
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// Copyright The OpenTelemetry 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 logs
import (
"context"
"github.com/DataDog/datadog-api-client-go/v2/api/datadogV2"
"github.com/DataDog/opentelemetry-mapping-go/pkg/otlp/attributes"
"github.com/DataDog/opentelemetry-mapping-go/pkg/otlp/attributes/source"
"go.opentelemetry.io/collector/component"
"go.opentelemetry.io/collector/pdata/pcommon"
"go.opentelemetry.io/collector/pdata/plog"
conventions "go.opentelemetry.io/collector/semconv/v1.6.1"
"go.opentelemetry.io/otel/attribute"
)
var (
signalTypeSet = attribute.NewSet(attribute.String("signal", "logs"))
)
// Translator of OTLP logs to Datadog format
type Translator struct {
set component.TelemetrySettings
attributesTranslator *attributes.Translator
otelTag string
}
// NewTranslator returns a new Translator
func NewTranslator(set component.TelemetrySettings, attributesTranslator *attributes.Translator, otelSource string) (*Translator, error) {
return &Translator{
set: set,
attributesTranslator: attributesTranslator,
otelTag: "otel_source:" + otelSource,
}, nil
}
func (t *Translator) hostNameAndServiceNameFromResource(ctx context.Context, res pcommon.Resource) (host string, service string) {
if src, ok := t.attributesTranslator.ResourceToSource(ctx, res, signalTypeSet); ok && src.Kind == source.HostnameKind {
host = src.Identifier
}
if s, ok := res.Attributes().Get(conventions.AttributeServiceName); ok {
service = s.AsString()
}
return host, service
}
func (t *Translator) hostFromAttributes(ctx context.Context, attrs pcommon.Map) string {
if src, ok := t.attributesTranslator.AttributesToSource(ctx, attrs); ok && src.Kind == source.HostnameKind {
return src.Identifier
}
return ""
}
// MapLogs from OTLP format to Datadog format.
func (t *Translator) MapLogs(ctx context.Context, ld plog.Logs) []datadogV2.HTTPLogItem {
rsl := ld.ResourceLogs()
var payloads []datadogV2.HTTPLogItem
for i := 0; i < rsl.Len(); i++ {
rl := rsl.At(i)
sls := rl.ScopeLogs()
res := rl.Resource()
host, service := t.hostNameAndServiceNameFromResource(ctx, res)
for j := 0; j < sls.Len(); j++ {
sl := sls.At(j)
lsl := sl.LogRecords()
// iterate over Logs
for k := 0; k < lsl.Len(); k++ {
log := lsl.At(k)
// HACK: Check for host and service in log record attributes
// This is not aligned with the specification and will be removed in the future.
if host == "" {
host = t.hostFromAttributes(ctx, log.Attributes())
}
if service == "" {
if s, ok := log.Attributes().Get(conventions.AttributeServiceName); ok {
service = s.AsString()
}
}
payload := transform(log, host, service, res, t.set.Logger)
ddtags := payload.GetDdtags()
if ddtags != "" {
payload.SetDdtags(ddtags + "," + t.otelTag)
} else {
payload.SetDdtags(t.otelTag)
}
payloads = append(payloads, payload)
}
}
}
return payloads
}