stdoutlog: Do not print timestamps when WithoutTimestamps is set

CHANGELOG.md

@@ -13,6 +13,10 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 - Add `RecordFactory` in `go.opentelemetry.io/otel/log/logtest` to facilitate testing the bridge implementations. (#5263)
 - Add `RecordFactory` in `go.opentelemetry.io/otel/sdk/log/logtest` to facilitate testing the exporter and processor implementations. (#5258)
 
+### Changed
+
+- `go.opentelemetry.io/otel/exporters/stdout/stdoutlog` won't print timestamps when `WithoutTimestamps` option is set. (#5241)
+
 ## [1.26.0/0.48.0/0.2.0-alpha] 2024-04-24
 
 ### Added

exporters/stdout/stdoutlog/exporter_test.go

@@ -48,7 +48,7 @@ func TestExporter(t *testing.T) {
 
 				return exporter
 			}(),
-			want: getJSON(now),
+			want: getJSON(&now),
 		},
 	}
 
@@ -113,7 +113,7 @@ func TestExporterExport(t *testing.T) {
 			options:    []Option{},
 			ctx:        context.Background(),
 			records:    records,
-			wantResult: getJSONs(now),
+			wantResult: getJSONs(&now),
 		},
 		{
 			name:       "NoRecords",
@@ -127,21 +127,21 @@ func TestExporterExport(t *testing.T) {
 			options:    []Option{WithPrettyPrint()},
 			ctx:        context.Background(),
 			records:    records,
-			wantResult: getPrettyJSONs(now),
+			wantResult: getPrettyJSONs(&now),
 		},
 		{
 			name:       "WithoutTimestamps",
 			options:    []Option{WithoutTimestamps()},
 			ctx:        context.Background(),
 			records:    records,
-			wantResult: getJSONs(time.Time{}),
+			wantResult: getJSONs(nil),
 		},
 		{
 			name:       "WithoutTimestamps and WithPrettyPrint",
 			options:    []Option{WithoutTimestamps(), WithPrettyPrint()},
 			ctx:        context.Background(),
 			records:    records,
-			wantResult: getPrettyJSONs(time.Time{}),
+			wantResult: getPrettyJSONs(nil),
 		},
 		{
 			name: "WithCanceledContext",
@@ -171,22 +171,28 @@ func TestExporterExport(t *testing.T) {
 	}
 }
 
-func getJSON(now time.Time) string {
-	serializedNow, _ := json.Marshal(now)
+func getJSON(now *time.Time) string {
+	var timestamps string
+	if now != nil {
+		serializedNow, _ := json.Marshal(now)
+		timestamps = "\"Timestamp\":" + string(serializedNow) + ",\"ObservedTimestamp\":" + string(serializedNow) + ","
+	}
 
-	return "{\"Timestamp\":" + string(serializedNow) + ",\"ObservedTimestamp\":" + string(serializedNow) + ",\"Severity\":9,\"SeverityText\":\"INFO\",\"Body\":{},\"Attributes\":[{\"Key\":\"key\",\"Value\":{}},{\"Key\":\"key2\",\"Value\":{}},{\"Key\":\"key3\",\"Value\":{}},{\"Key\":\"key4\",\"Value\":{}},{\"Key\":\"key5\",\"Value\":{}},{\"Key\":\"bool\",\"Value\":{}}],\"TraceID\":\"0102030405060708090a0b0c0d0e0f10\",\"SpanID\":\"0102030405060708\",\"TraceFlags\":\"01\",\"Resource\":null,\"Scope\":{\"Name\":\"\",\"Version\":\"\",\"SchemaURL\":\"\"},\"AttributeValueLengthLimit\":0,\"AttributeCountLimit\":0}\n"
+	return "{" + timestamps + "\"Severity\":9,\"SeverityText\":\"INFO\",\"Body\":{},\"Attributes\":[{\"Key\":\"key\",\"Value\":{}},{\"Key\":\"key2\",\"Value\":{}},{\"Key\":\"key3\",\"Value\":{}},{\"Key\":\"key4\",\"Value\":{}},{\"Key\":\"key5\",\"Value\":{}},{\"Key\":\"bool\",\"Value\":{}}],\"TraceID\":\"0102030405060708090a0b0c0d0e0f10\",\"SpanID\":\"0102030405060708\",\"TraceFlags\":\"01\",\"Resource\":null,\"Scope\":{\"Name\":\"\",\"Version\":\"\",\"SchemaURL\":\"\"},\"AttributeValueLengthLimit\":0,\"AttributeCountLimit\":0}\n"
 }
 
-func getJSONs(now time.Time) string {
+func getJSONs(now *time.Time) string {
 	return getJSON(now) + getJSON(now)
 }
 
-func getPrettyJSON(now time.Time) string {
-	serializedNow, _ := json.Marshal(now)
+func getPrettyJSON(now *time.Time) string {
+	var timestamps string
+	if now != nil {
+		serializedNow, _ := json.Marshal(now)
+		timestamps = "\n\t\"Timestamp\": " + string(serializedNow) + ",\n\t\"ObservedTimestamp\": " + string(serializedNow) + ","
+	}
 
-	return `{
-	"Timestamp": ` + string(serializedNow) + `,
-	"ObservedTimestamp": ` + string(serializedNow) + `,
+	return `{` + timestamps + `
 	"Severity": 9,
 	"SeverityText": "INFO",
 	"Body": {},
@@ -231,7 +237,7 @@ func getPrettyJSON(now time.Time) string {
 `
 }
 
-func getPrettyJSONs(now time.Time) string {
+func getPrettyJSONs(now *time.Time) string {
 	return getPrettyJSON(now) + getPrettyJSON(now)
 }
 

exporters/stdout/stdoutlog/record.go

@@ -15,8 +15,8 @@ import (
 
 // recordJSON is a JSON-serializable representation of a Record.
 type recordJSON struct {
-	Timestamp                 time.Time
-	ObservedTimestamp         time.Time
+	Timestamp                 *time.Time `json:",omitempty"`
+	ObservedTimestamp         *time.Time `json:",omitempty"`
 	Severity                  log.Severity
 	SeverityText              string
 	Body                      log.Value
@@ -53,8 +53,11 @@ func (e *Exporter) newRecordJSON(r sdklog.Record) recordJSON {
 	})
 
 	if e.timestamps {
-		newRecord.Timestamp = r.Timestamp()
-		newRecord.ObservedTimestamp = r.ObservedTimestamp()
+		timestamp := r.Timestamp()
+		newRecord.Timestamp = &timestamp
+
+		observedTimestamp := r.ObservedTimestamp()
+		newRecord.ObservedTimestamp = &observedTimestamp
 	}
 
 	return newRecord