fix: make attribute slice with zero length

ahkui · ahkui · commit c51f8a9c58b6 · 2025-06-03T16:34:29.000+08:00
Signed-off-by: ahkui &lt;ahkui@outlook.com&gt;
diff --git a/components/metrics/opentelemetry_publisher.go b/components/metrics/opentelemetry_publisher.go
@@ -30,7 +30,7 @@ func (m PublisherOpenTelemetryMetricsDecorator) Publish(topic string, messages .
 	if labelsMap[labelKeyHandlerName] == "" {
 		labelsMap[labelKeyHandlerName] = labelValueNoHandler
 	}
-	labels := make([]attribute.KeyValue, len(labelsMap))
+	labels := make([]attribute.KeyValue, 0, len(labelsMap))
 	for k, v := range labelsMap {
 		labels = append(labels, attribute.String(k, v))
 	}
diff --git a/components/metrics/opentelemetry_subscriber.go b/components/metrics/opentelemetry_subscriber.go
@@ -26,7 +26,7 @@ func (s SubscriberOpenTelemetryMetricsDecorator) recordMetrics(msg *message.Mess
 	if labelsMap[labelKeyHandlerName] == "" {
 		labelsMap[labelKeyHandlerName] = labelValueNoHandler
 	}
-	labels := make([]attribute.KeyValue, len(labelsMap))
+	labels := make([]attribute.KeyValue, 0, len(labelsMap))
 	for k, v := range labelsMap {
 		labels = append(labels, attribute.String(k, v))
 	}

Original file line number	Diff line number	Diff line change
`@@ -30,7 +30,7 @@ func (m PublisherOpenTelemetryMetricsDecorator) Publish(topic string, messages .`
`30`	`30`	`if labelsMap[labelKeyHandlerName] == "" {`
`31`	`31`	`labelsMap[labelKeyHandlerName] = labelValueNoHandler`
`32`	`32`	`}`
`33`		`- labels := make([]attribute.KeyValue, len(labelsMap))`
	`33`	`+ labels := make([]attribute.KeyValue, 0, len(labelsMap))`
`34`	`34`	`for k, v := range labelsMap {`
`35`	`35`	`labels = append(labels, attribute.String(k, v))`
`36`	`36`	`}`
Original file line number	Diff line number	Diff line change
`@@ -26,7 +26,7 @@ func (s SubscriberOpenTelemetryMetricsDecorator) recordMetrics(msg *message.Mess`
`26`	`26`	`if labelsMap[labelKeyHandlerName] == "" {`
`27`	`27`	`labelsMap[labelKeyHandlerName] = labelValueNoHandler`
`28`	`28`	`}`
`29`		`- labels := make([]attribute.KeyValue, len(labelsMap))`
	`29`	`+ labels := make([]attribute.KeyValue, 0, len(labelsMap))`
`30`	`30`	`for k, v := range labelsMap {`
`31`	`31`	`labels = append(labels, attribute.String(k, v))`
`32`	`32`	`}`