malthe commented on code in PR #6443:
URL: https://github.com/apache/nifi/pull/6443#discussion_r1002223463


##########
nifi-nar-bundles/nifi-azure-bundle/nifi-azure-processors/src/main/java/org/apache/nifi/processors/azure/storage/PutAzureBlobStorage_v12.java:
##########
@@ -121,18 +146,47 @@ public void onTrigger(final ProcessContext context, final 
ProcessSession session
             if (createContainer && !containerClient.exists()) {
                 containerClient.create();
             }
-            BlobClient blobClient = containerClient.getBlobClient(blobName);
 
+            BlobClient blobClient = containerClient.getBlobClient(blobName);
+            final BlobRequestConditions blobRequestConditions = new 
BlobRequestConditions();
+            Map<String, String> attributes = new HashMap<>();
+            attributes.put(ATTR_NAME_CONTAINER, containerName);
+            attributes.put(ATTR_NAME_BLOBNAME, blobName);
+            attributes.put(ATTR_NAME_PRIMARY_URI, blobClient.getBlobUrl());
+            attributes.put(ATTR_NAME_LANG, null);
+            attributes.put(ATTR_NAME_MIME_TYPE, "application/octet-stream");
             long length = flowFile.getSize();
 
-            try (InputStream rawIn = session.read(flowFile);
-                 BufferedInputStream bufferedIn = new 
BufferedInputStream(rawIn)) {
-                blobClient.upload(bufferedIn, length);
+            try {
+                if (conflictResolution != 
AzureStorageConflictResolutionStrategy.REPLACE_RESOLUTION) {
+                    blobRequestConditions.setIfNoneMatch("*");
+                }
+
+                try (InputStream rawIn = session.read(flowFile)) {
+                    final BlobParallelUploadOptions blobParallelUploadOptions 
= new BlobParallelUploadOptions(toFluxByteBuffer(rawIn));
+                    
blobParallelUploadOptions.setRequestConditions(blobRequestConditions);
+                    Response<BlockBlobItem> response = 
blobClient.uploadWithResponse(blobParallelUploadOptions, null, Context.NONE);
+                    BlockBlobItem blob = response.getValue();
+                    attributes.put(ATTR_NAME_BLOBTYPE, 
BlobType.BLOCK_BLOB.toString());
+                    attributes.put(ATTR_NAME_ETAG, blob.getETag());
+                    attributes.put(ATTR_NAME_LENGTH, String.valueOf(length));
+                    attributes.put(ATTR_NAME_TIMESTAMP, 
String.valueOf(blob.getLastModified()));
+                }
+            } catch (BlobStorageException e) {
+                if (conflictResolution == 
AzureStorageConflictResolutionStrategy.FAIL_RESOLUTION) {
+                    throw e;
+                }
+                final BlobErrorCode errorCode = e.getErrorCode();
+                if (errorCode == BlobErrorCode.BLOB_ALREADY_EXISTS) {
+                    getLogger().warn("Blob already exists: remote blob not 
modified. Transferring {} to success", flowFile);
+                    attributes.putAll(createBlobAttributesMap(blobClient));
+                    attributes.put(ATTR_NAME_ERROR_CODE, 
e.getErrorCode().toString());

Review Comment:
   I do think it's rather nice to have it available in an attribute because in 
the log it is not isolated particularly well.



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