[pkg/datadog] expose Zaplogger (open-telemetry#37939)

#### Description
Expose the internal Zaplogger implementation so that it can be reused in
datadog-agent.

.chloggen/dd-logger.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: pkg/datadog
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Expose the internal Zaplogger implementation
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [37939]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: [api]

exporter/datadogexporter/agent_components.go

@@ -12,11 +12,13 @@ import (
 	pkgconfigmodel "github.com/DataDog/datadog-agent/pkg/config/model"
 	pkgconfigsetup "github.com/DataDog/datadog-agent/pkg/config/setup"
 	"go.opentelemetry.io/collector/component"
+
+	pkgdatadog "github.com/open-telemetry/opentelemetry-collector-contrib/pkg/datadog"
 )
 
 func newLogComponent(set component.TelemetrySettings) corelog.Component {
-	zlog := &zaplogger{
-		logger: set.Logger,
+	zlog := &pkgdatadog.Zaplogger{
+		Logger: set.Logger,
 	}
 	return zlog
 }

exporter/datadogexporter/traces_exporter.go

@@ -254,6 +254,6 @@ func newTraceAgentConfig(ctx context.Context, params exporter.Settings, cfg *Con
 	if !datadog.ReceiveResourceSpansV2FeatureGate.IsEnabled() {
 		acfg.Features["disable_receive_resource_spans_v2"] = struct{}{}
 	}
-	tracelog.SetLogger(&zaplogger{params.Logger}) // TODO: This shouldn't be a singleton
+	tracelog.SetLogger(&datadog.Zaplogger{Logger: params.Logger}) // TODO: This shouldn't be a singleton
 	return acfg, nil
 }

pkg/datadog/go.mod

@@ -3,6 +3,7 @@ module github.com/open-telemetry/opentelemetry-collector-contrib/pkg/datadog
 go 1.23.0
 
 require (
+	github.com/DataDog/datadog-agent/pkg/trace v0.62.2
 	github.com/DataDog/datadog-agent/pkg/util/hostname/validate v0.62.2
 	github.com/DataDog/opentelemetry-mapping-go/pkg/otlp/attributes v0.25.0
 	github.com/DataDog/opentelemetry-mapping-go/pkg/otlp/metrics v0.25.0
@@ -34,7 +35,7 @@ require (
 	github.com/DataDog/opentelemetry-mapping-go/pkg/inframetadata v0.25.0 // indirect
 	github.com/DataDog/opentelemetry-mapping-go/pkg/quantile v0.25.0 // indirect
 	github.com/DataDog/sketches-go v1.4.6 // indirect
-	github.com/DataDog/zstd v1.5.2 // indirect
+	github.com/DataDog/zstd v1.5.6 // indirect
 	github.com/GoogleCloudPlatform/opentelemetry-operations-go/detectors/gcp v1.26.0 // indirect
 	github.com/aws/aws-sdk-go-v2 v1.36.1 // indirect
 	github.com/aws/aws-sdk-go-v2/config v1.29.6 // indirect
@@ -136,7 +137,7 @@ require (
 	golang.org/x/sys v0.29.0 // indirect
 	golang.org/x/term v0.28.0 // indirect
 	golang.org/x/text v0.21.0 // indirect
-	golang.org/x/time v0.7.0 // indirect
+	golang.org/x/time v0.8.0 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20241230172942-26aa7a208def // indirect
 	google.golang.org/grpc v1.70.0 // indirect
 	google.golang.org/protobuf v1.36.5 // indirect

pkg/datadog/zaplogger.go

@@ -0,0 +1,86 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package datadog // import "github.com/open-telemetry/opentelemetry-collector-contrib/pkg/datadog"
+
+import (
+	"fmt"
+
+	tracelog "github.com/DataDog/datadog-agent/pkg/trace/log"
+	"go.uber.org/zap"
+)
+
+var _ tracelog.Logger = &Zaplogger{}
+
+// Zaplogger implements the tracelog.Logger interface on top of a zap.Logger
+type Zaplogger struct {
+	// Logger is the internal zap logger
+	Logger *zap.Logger
+}
+
+// Trace implements Logger.
+func (z *Zaplogger) Trace(_ ...any) { /* N/A */ }
+
+// Tracef implements Logger.
+func (z *Zaplogger) Tracef(_ string, _ ...any) { /* N/A */ }
+
+// Debug implements Logger.
+func (z *Zaplogger) Debug(v ...any) {
+	z.Logger.Debug(fmt.Sprint(v...))
+}
+
+// Debugf implements Logger.
+func (z *Zaplogger) Debugf(format string, params ...any) {
+	z.Logger.Debug(fmt.Sprintf(format, params...))
+}
+
+// Info implements Logger.
+func (z *Zaplogger) Info(v ...any) {
+	z.Logger.Info(fmt.Sprint(v...))
+}
+
+// Infof implements Logger.
+func (z *Zaplogger) Infof(format string, params ...any) {
+	z.Logger.Info(fmt.Sprintf(format, params...))
+}
+
+// Warn implements Logger.
+func (z *Zaplogger) Warn(v ...any) error {
+	z.Logger.Warn(fmt.Sprint(v...))
+	return nil
+}
+
+// Warnf implements Logger.
+func (z *Zaplogger) Warnf(format string, params ...any) error {
+	z.Logger.Warn(fmt.Sprintf(format, params...))
+	return nil
+}
+
+// Error implements Logger.
+func (z *Zaplogger) Error(v ...any) error {
+	z.Logger.Error(fmt.Sprint(v...))
+	return nil
+}
+
+// Errorf implements Logger.
+func (z *Zaplogger) Errorf(format string, params ...any) error {
+	z.Logger.Error(fmt.Sprintf(format, params...))
+	return nil
+}
+
+// Critical implements Logger.
+func (z *Zaplogger) Critical(v ...any) error {
+	z.Logger.Error(fmt.Sprint(v...), zap.Bool("critical", true))
+	return nil
+}
+
+// Criticalf implements Logger.
+func (z *Zaplogger) Criticalf(format string, params ...any) error {
+	z.Logger.Error(fmt.Sprintf(format, params...), zap.Bool("critical", true))
+	return nil
+}
+
+// Flush implements Logger.
+func (z *Zaplogger) Flush() {
+	_ = z.Logger.Sync()
+}