fix: CDS-2533 - blob-to-otel fix storage account name (#94)

Author: vjofusha

BlobToOtel/BlobToOtel/index.ts

@@ -120,17 +120,23 @@ const eventHubTrigger = async function (context: InvocationContext, eventHubMess
                         if (!line || !line.trim()) continue; // Skip empty lines
 
                         try {
+                            const storageAccountName = event.topic ? event.topic.split('/').pop() : urlParts.hostname.split('.')[0];
+                            const attributes: any = {
+                                'log.type': 'BlobLogRecord',
+                                'blob.container': containerName,
+                                'blob.path': blobPath,
+                                'blob.storage.account': storageAccountName
+                            };
+                            
+                            if (event.data?.contentLength) {
+                                attributes['blob.size'] = event.data.contentLength;
+                            }
+                            
                             logger.emit({
                                 severityNumber: logsAPI.SeverityNumber.INFO,
                                 severityText: 'INFO',
                                 body: line,
-                                attributes: {
-                                    'log.type': 'BlobLogRecord',
-                                    'blob.container': containerName,
-                                    'blob.path': blobPath,
-                                    'blob.storage.account': event.topic.split('/').pop(),
-                                    'blob.size': event.data.contentLength
-                                }
+                                attributes
                             });
                             processedLines++;
                         } catch (lineError) {

BlobToOtel/CHANGELOG.md

@@ -5,6 +5,9 @@
 <!-- ### version / full date -->
 <!-- * [Update/Bug fix] message that describes the changes that you apply -->
 
+### 2.3.0 / 26 Jan 2026 
+* [Fix] Handle undefined event.topic when extracting storage account name
+
 ### 2.2.0 / 05 Jan 2026
 [Fix] Improve batching logic
 [Update] Use `@opentelemetry/exporter-logs-otlp-http` instead of `@opentelemetry/exporter-logs-otlp-grpc`