Add otlploghttp transform package

exporters/otlp/otlplog/otlploghttp/client.go

@@ -10,10 +10,10 @@ import (
 )
 
 type client struct {
-	uploadLogs func(context.Context, *logpb.ResourceLogs) error
+	uploadLogs func(context.Context, []*logpb.ResourceLogs) error
 }
 
-func (c *client) UploadLogs(ctx context.Context, rl *logpb.ResourceLogs) error {
+func (c *client) UploadLogs(ctx context.Context, rl []*logpb.ResourceLogs) error {
 	if c.uploadLogs != nil {
 		return c.uploadLogs(ctx, rl)
 	}

exporters/otlp/otlplog/otlploghttp/exporter.go

@@ -5,7 +5,6 @@
 
 import (
 	"context"
-	"errors"
 	"sync/atomic"
 
 	"go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp/internal/transform"
@@ -47,12 +46,11 @@
 	if e.stopped.Load() {
 		return nil
 	}
-	otlp, err := transformResourceLogs(records)
-	if otlp != nil {
-		// Best effort upload of transformable logs.
-		err = errors.Join(err, e.client.Load().UploadLogs(ctx, otlp))
+	otlp := transformResourceLogs(records)
+	if otlp == nil {
+		return nil
 	}
-	return err
+	return e.client.Load().UploadLogs(ctx, otlp)
 }
 
 // Shutdown shuts down the Exporter. Calls to Export or ForceFlush will perform

exporters/otlp/otlplog/otlploghttp/exporter_test.go

@@ -19,45 +19,34 @@ import (
 )
 
 func TestExporterExportErrors(t *testing.T) {
-	var (
-		errUpload = errors.New("upload")
-		errTForm  = errors.New("transform")
-	)
-
+	errUpload := errors.New("upload")
 	c := &client{
-		uploadLogs: func(context.Context, *logpb.ResourceLogs) error {
+		uploadLogs: func(context.Context, []*logpb.ResourceLogs) error {
 			return errUpload
 		},
 	}
 
-	orig := transformResourceLogs
-	transformResourceLogs = func(r []log.Record) (*logpb.ResourceLogs, error) {
-		return new(logpb.ResourceLogs), errTForm
-	}
-	t.Cleanup(func() { transformResourceLogs = orig })
-
 	e, err := newExporter(c, config{})
 	require.NoError(t, err, "New")
 
 	err = e.Export(context.Background(), make([]log.Record, 1))
 	assert.ErrorIs(t, err, errUpload)
-	assert.ErrorIs(t, err, errTForm)
 }
 
 func TestExporterExport(t *testing.T) {
 	var uploads int
 	c := &client{
-		uploadLogs: func(context.Context, *logpb.ResourceLogs) error {
+		uploadLogs: func(context.Context, []*logpb.ResourceLogs) error {
 			uploads++
 			return nil
 		},
 	}
 
 	orig := transformResourceLogs
 	var got []log.Record
-	transformResourceLogs = func(r []log.Record) (*logpb.ResourceLogs, error) {
+	transformResourceLogs = func(r []log.Record) []*logpb.ResourceLogs {
 		got = r
-		return new(logpb.ResourceLogs), nil
+		return make([]*logpb.ResourceLogs, 1)
 	}
 	t.Cleanup(func() { transformResourceLogs = orig })
 

exporters/otlp/otlplog/otlploghttp/go.mod

@@ -5,7 +5,11 @@ go 1.21
 require (
 	github.com/cenkalti/backoff/v4 v4.3.0
 	github.com/stretchr/testify v1.9.0
+	go.opentelemetry.io/otel v1.25.0
+	go.opentelemetry.io/otel/log v0.0.1-alpha
+	go.opentelemetry.io/otel/sdk v1.24.0
 	go.opentelemetry.io/otel/sdk/log v0.0.0-20240403115316-6c6e1e7416e9
+	go.opentelemetry.io/otel/trace v1.25.0
 	go.opentelemetry.io/proto/otlp v1.1.0
 )
 
@@ -14,11 +18,7 @@ require (
 	github.com/go-logr/logr v1.4.1 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	go.opentelemetry.io/otel v1.25.0 // indirect
-	go.opentelemetry.io/otel/log v0.0.1-alpha // indirect
 	go.opentelemetry.io/otel/metric v1.25.0 // indirect
-	go.opentelemetry.io/otel/sdk v1.24.0 // indirect
-	go.opentelemetry.io/otel/trace v1.25.0 // indirect
 	golang.org/x/sys v0.19.0 // indirect
 	google.golang.org/protobuf v1.33.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect

exporters/otlp/otlplog/otlploghttp/internal/transform/attr_test.go

@@ -0,0 +1,183 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package transform
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"go.opentelemetry.io/otel/attribute"
+	cpb "go.opentelemetry.io/proto/otlp/common/v1"
+)
+
+var (
+	attrBool         = attribute.Bool("bool", true)
+	attrBoolSlice    = attribute.BoolSlice("bool slice", []bool{true, false})
+	attrInt          = attribute.Int("int", 1)
+	attrIntSlice     = attribute.IntSlice("int slice", []int{-1, 1})
+	attrInt64        = attribute.Int64("int64", 1)
+	attrInt64Slice   = attribute.Int64Slice("int64 slice", []int64{-1, 1})
+	attrFloat64      = attribute.Float64("float64", 1)
+	attrFloat64Slice = attribute.Float64Slice("float64 slice", []float64{-1, 1})
+	attrString       = attribute.String("string", "o")
+	attrStringSlice  = attribute.StringSlice("string slice", []string{"o", "n"})
+	attrInvalid      = attribute.KeyValue{
+		Key:   attribute.Key("invalid"),
+		Value: attribute.Value{},
+	}
+
+	valBoolTrue  = &cpb.AnyValue{Value: &cpb.AnyValue_BoolValue{BoolValue: true}}
+	valBoolFalse = &cpb.AnyValue{Value: &cpb.AnyValue_BoolValue{BoolValue: false}}
+	valBoolSlice = &cpb.AnyValue{Value: &cpb.AnyValue_ArrayValue{
+		ArrayValue: &cpb.ArrayValue{
+			Values: []*cpb.AnyValue{valBoolTrue, valBoolFalse},
+		},
+	}}
+	valIntOne   = &cpb.AnyValue{Value: &cpb.AnyValue_IntValue{IntValue: 1}}
+	valIntNOne  = &cpb.AnyValue{Value: &cpb.AnyValue_IntValue{IntValue: -1}}
+	valIntSlice = &cpb.AnyValue{Value: &cpb.AnyValue_ArrayValue{
+		ArrayValue: &cpb.ArrayValue{
+			Values: []*cpb.AnyValue{valIntNOne, valIntOne},
+		},
+	}}
+	valDblOne   = &cpb.AnyValue{Value: &cpb.AnyValue_DoubleValue{DoubleValue: 1}}
+	valDblNOne  = &cpb.AnyValue{Value: &cpb.AnyValue_DoubleValue{DoubleValue: -1}}
+	valDblSlice = &cpb.AnyValue{Value: &cpb.AnyValue_ArrayValue{
+		ArrayValue: &cpb.ArrayValue{
+			Values: []*cpb.AnyValue{valDblNOne, valDblOne},
+		},
+	}}
+	valStrO     = &cpb.AnyValue{Value: &cpb.AnyValue_StringValue{StringValue: "o"}}
+	valStrN     = &cpb.AnyValue{Value: &cpb.AnyValue_StringValue{StringValue: "n"}}
+	valStrSlice = &cpb.AnyValue{Value: &cpb.AnyValue_ArrayValue{
+		ArrayValue: &cpb.ArrayValue{
+			Values: []*cpb.AnyValue{valStrO, valStrN},
+		},
+	}}
+
+	kvBool         = &cpb.KeyValue{Key: "bool", Value: valBoolTrue}
+	kvBoolSlice    = &cpb.KeyValue{Key: "bool slice", Value: valBoolSlice}
+	kvInt          = &cpb.KeyValue{Key: "int", Value: valIntOne}
+	kvIntSlice     = &cpb.KeyValue{Key: "int slice", Value: valIntSlice}
+	kvInt64        = &cpb.KeyValue{Key: "int64", Value: valIntOne}
+	kvInt64Slice   = &cpb.KeyValue{Key: "int64 slice", Value: valIntSlice}
+	kvFloat64      = &cpb.KeyValue{Key: "float64", Value: valDblOne}
+	kvFloat64Slice = &cpb.KeyValue{Key: "float64 slice", Value: valDblSlice}
+	kvString       = &cpb.KeyValue{Key: "string", Value: valStrO}
+	kvStringSlice  = &cpb.KeyValue{Key: "string slice", Value: valStrSlice}
+	kvInvalid      = &cpb.KeyValue{
+		Key: "invalid",
+		Value: &cpb.AnyValue{
+			Value: &cpb.AnyValue_StringValue{StringValue: "INVALID"},
+		},
+	}
+)
+
+func TestAttrTransforms(t *testing.T) {
+	type attrTest struct {
+		name string
+		in   []attribute.KeyValue
+		want []*cpb.KeyValue
+	}
+
+	for _, test := range []attrTest{
+		{"nil", nil, nil},
+		{"empty", []attribute.KeyValue{}, nil},
+		{
+			"invalid",
+			[]attribute.KeyValue{attrInvalid},
+			[]*cpb.KeyValue{kvInvalid},
+		},
+		{
+			"bool",
+			[]attribute.KeyValue{attrBool},
+			[]*cpb.KeyValue{kvBool},
+		},
+		{
+			"bool slice",
+			[]attribute.KeyValue{attrBoolSlice},
+			[]*cpb.KeyValue{kvBoolSlice},
+		},
+		{
+			"int",
+			[]attribute.KeyValue{attrInt},
+			[]*cpb.KeyValue{kvInt},
+		},
+		{
+			"int slice",
+			[]attribute.KeyValue{attrIntSlice},
+			[]*cpb.KeyValue{kvIntSlice},
+		},
+		{
+			"int64",
+			[]attribute.KeyValue{attrInt64},
+			[]*cpb.KeyValue{kvInt64},
+		},
+		{
+			"int64 slice",
+			[]attribute.KeyValue{attrInt64Slice},
+			[]*cpb.KeyValue{kvInt64Slice},
+		},
+		{
+			"float64",
+			[]attribute.KeyValue{attrFloat64},
+			[]*cpb.KeyValue{kvFloat64},
+		},
+		{
+			"float64 slice",
+			[]attribute.KeyValue{attrFloat64Slice},
+			[]*cpb.KeyValue{kvFloat64Slice},
+		},
+		{
+			"string",
+			[]attribute.KeyValue{attrString},
+			[]*cpb.KeyValue{kvString},
+		},
+		{
+			"string slice",
+			[]attribute.KeyValue{attrStringSlice},
+			[]*cpb.KeyValue{kvStringSlice},
+		},
+		{
+			"all",
+			[]attribute.KeyValue{
+				attrBool,
+				attrBoolSlice,
+				attrInt,
+				attrIntSlice,
+				attrInt64,
+				attrInt64Slice,
+				attrFloat64,
+				attrFloat64Slice,
+				attrString,
+				attrStringSlice,
+				attrInvalid,
+			},
+			[]*cpb.KeyValue{
+				kvBool,
+				kvBoolSlice,
+				kvInt,
+				kvIntSlice,
+				kvInt64,
+				kvInt64Slice,
+				kvFloat64,
+				kvFloat64Slice,
+				kvString,
+				kvStringSlice,
+				kvInvalid,
+			},
+		},
+	} {
+		t.Run(test.name, func(t *testing.T) {
+			t.Run("Attrs", func(t *testing.T) {
+				assert.ElementsMatch(t, test.want, Attrs(test.in))
+			})
+			t.Run("AttrIter", func(t *testing.T) {
+				s := attribute.NewSet(test.in...)
+				assert.ElementsMatch(t, test.want, AttrIter(s.Iter()))
+			})
+		})
+	}
+}