sjyang18 commented on a change in pull request #4175:
URL: https://github.com/apache/nifi/pull/4175#discussion_r417688660
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File path:
nifi-nar-bundles/nifi-azure-bundle/nifi-azure-processors/src/main/java/org/apache/nifi/services/azure/storage/AzureBlobStorageUserMetadataStringLookupService.java
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@@ -0,0 +1,115 @@
+package org.apache.nifi.services.azure.storage;
+
+import com.microsoft.azure.storage.CloudStorageAccount;
+import com.microsoft.azure.storage.StorageException;
+import com.microsoft.azure.storage.blob.CloudBlob;
+import com.microsoft.azure.storage.blob.CloudBlobClient;
+import com.microsoft.azure.storage.blob.CloudBlobContainer;
+import org.apache.nifi.annotation.documentation.CapabilityDescription;
+import org.apache.nifi.annotation.documentation.Tags;
+import org.apache.nifi.annotation.lifecycle.OnEnabled;
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.components.ValidationContext;
+import org.apache.nifi.components.ValidationResult;
+import org.apache.nifi.controller.AbstractControllerService;
+import org.apache.nifi.controller.ConfigurationContext;
+import org.apache.nifi.lookup.LookupFailureException;
+import org.apache.nifi.lookup.StringLookupService;
+import org.apache.nifi.processors.azure.AbstractAzureBlobProcessor;
+import org.apache.nifi.processors.azure.storage.utils.AzureStorageUtils;
+
+import java.net.URISyntaxException;
+import java.util.*;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+@Tags({"azure", "microsoft", "cloud", "storage", "blob", "lookup", "enrich",
"key", "value"})
+@CapabilityDescription("Allows users to add key/value pairs as User-defined
Properties." +
+ "Each property that is added will be looked up in the User Metadata on the
Blob")
+public class AzureBlobStorageUserMetadataStringLookupService extends
AbstractControllerService implements StringLookupService {
+
+ protected static final String KEY = "key";
+ protected static final Set<String> REQUIRED_KEYS =
Collections.unmodifiableSet(Stream.of(KEY).collect(Collectors.toSet()));
+
+ private static final List<PropertyDescriptor> PROPERTIES = Collections
Review comment:
This file has 2 space indentation. Maybe 4 space indentation to match
other source files?
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