Github user aperepel commented on a diff in the pull request:
https://github.com/apache/nifi/pull/1636#discussion_r109970455
--- Diff:
nifi-nar-bundles/nifi-azure-bundle/nifi-azure-processors/src/main/java/org/apache/nifi/processors/azure/storage/ListAzureBlobStorage.java
---
@@ -0,0 +1,181 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.nifi.processors.azure.storage;
+
+import java.io.IOException;
+import java.net.URISyntaxException;
+import java.security.InvalidKeyException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.EnumSet;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.nifi.annotation.behavior.InputRequirement;
+import org.apache.nifi.annotation.behavior.InputRequirement.Requirement;
+import org.apache.nifi.annotation.behavior.Stateful;
+import org.apache.nifi.annotation.behavior.TriggerSerially;
+import org.apache.nifi.annotation.behavior.WritesAttribute;
+import org.apache.nifi.annotation.behavior.WritesAttributes;
+import org.apache.nifi.annotation.documentation.CapabilityDescription;
+import org.apache.nifi.annotation.documentation.SeeAlso;
+import org.apache.nifi.annotation.documentation.Tags;
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.components.state.Scope;
+import org.apache.nifi.processor.ProcessContext;
+import org.apache.nifi.processor.util.StandardValidators;
+import org.apache.nifi.processors.azure.AzureConstants;
+import org.apache.nifi.processors.azure.storage.utils.BlobInfo;
+import org.apache.nifi.processors.azure.storage.utils.BlobInfo.Builder;
+import org.apache.nifi.processors.standard.AbstractListProcessor;
+
+import com.microsoft.azure.storage.CloudStorageAccount;
+import com.microsoft.azure.storage.OperationContext;
+import com.microsoft.azure.storage.StorageException;
+import com.microsoft.azure.storage.StorageUri;
+import com.microsoft.azure.storage.blob.BlobListingDetails;
+import com.microsoft.azure.storage.blob.BlobProperties;
+import com.microsoft.azure.storage.blob.BlobRequestOptions;
+import com.microsoft.azure.storage.blob.CloudBlob;
+import com.microsoft.azure.storage.blob.CloudBlobClient;
+import com.microsoft.azure.storage.blob.CloudBlobContainer;
+import com.microsoft.azure.storage.blob.CloudBlockBlob;
+import com.microsoft.azure.storage.blob.ListBlobItem;
+
+@TriggerSerially
+@Tags({ "azure", "microsoft", "cloud", "storage", "blob" })
+@SeeAlso({ FetchAzureBlobStorage.class })
+@CapabilityDescription("Lists blobs in an Azure Storage container. Listing
details are attached to an empty FlowFile for use with FetchAzureBlobStorage")
+@InputRequirement(Requirement.INPUT_FORBIDDEN)
+@WritesAttributes({ @WritesAttribute(attribute = "azure.container",
description = "The name of the azure container"),
+ @WritesAttribute(attribute = "azure.blobname", description = "The
name of the azure blob"), @WritesAttribute(attribute = "azure.primaryUri",
description = "Primary location for blob content"),
+ @WritesAttribute(attribute = "azure.secondaryUri", description =
"Secondary location for blob content"), @WritesAttribute(attribute =
"azure.etag", description = "Etag for the Azure blob"),
+ @WritesAttribute(attribute = "azure.length", description = "Length
of the blob"), @WritesAttribute(attribute = "azure.timestamp", description =
"The timestamp in Azure for the blob"),
+ @WritesAttribute(attribute = "mime.type", description = "MimeType
of the content"), @WritesAttribute(attribute = "lang", description = "Language
code for the content"),
+ @WritesAttribute(attribute = "azure.blobtype", description = "This
is the type of blob and can be either page or block type") })
+@Stateful(scopes = { Scope.LOCAL, Scope.CLUSTER }, description = "After
performing a listing of blobs, the timestamp of the newest blob is stored. "
+ + "This allows the Processor to list only blobs that have been
added or modified after " + "this date the next time that the Processor is
run.")
+public class ListAzureBlobStorage extends AbstractListProcessor<BlobInfo> {
+
+ private static final PropertyDescriptor PREFIX = new
PropertyDescriptor.Builder().name("Prefix").description("Search prefix for
listing").addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
+ .expressionLanguageSupported(true).required(false).build();
+
+ public static final List<PropertyDescriptor> PROPERTIES =
Collections.unmodifiableList(Arrays.asList(AzureConstants.ACCOUNT_NAME,
AzureConstants.ACCOUNT_KEY, AzureConstants.CONTAINER, PREFIX));
+
+ @Override
+ protected List<PropertyDescriptor> getSupportedPropertyDescriptors() {
+ return PROPERTIES;
+ }
+
+ @Override
+ protected Map<String, String> createAttributes(BlobInfo entity,
ProcessContext context) {
+ final Map<String, String> attributes = new HashMap<>();
+ attributes.put("azure.etag", entity.getEtag());
+ attributes.put("azure.primaryUri", entity.getPrimaryUri());
+ attributes.put("azure.secondaryUri", entity.getSecondaryUri());
+ attributes.put("azure.blobname", entity.getName());
+ attributes.put("azure.blobtype", entity.getBlobType());
+ attributes.put("azure.length", String.valueOf(entity.getLength()));
+ attributes.put("azure.timestamp",
String.valueOf(entity.getTimestamp()));
+ attributes.put("mime.type", entity.getContentType());
+ attributes.put("lang", entity.getContentLanguage());
+
+ return attributes;
+ }
+
+ @Override
+ protected String getPath(final ProcessContext context) {
+ return
context.getProperty(AzureConstants.CONTAINER).evaluateAttributeExpressions().getValue();
+ }
+
+ @Override
+ protected boolean isListingResetNecessary(final PropertyDescriptor
property) {
+ // re-list if configuration changed, but not when security keys
are rolled (not included in the condition)
+ return PREFIX.equals(property)
+ || AzureConstants.ACCOUNT_NAME.equals(property)
+ || AzureConstants.CONTAINER.equals(property);
+ }
+
+ @Override
+ protected Scope getStateScope(final ProcessContext context) {
+ return Scope.CLUSTER;
+ }
+
+ @Override
+ protected List<BlobInfo> performListing(final ProcessContext context,
final Long minTimestamp) throws IOException {
+ String containerName =
context.getProperty(AzureConstants.CONTAINER).evaluateAttributeExpressions().getValue();
+ String prefix =
context.getProperty(PREFIX).evaluateAttributeExpressions().getValue();
+ if (prefix == null) {
+ prefix = "";
+ }
+ final List<BlobInfo> listing = new ArrayList<>();
+ try {
+ CloudStorageAccount storageAccount =
createStorageConnection(context);
+ CloudBlobClient blobClient =
storageAccount.createCloudBlobClient();
+ CloudBlobContainer container =
blobClient.getContainerReference(containerName);
+
+ BlobRequestOptions blobRequestOptions = null;
+ OperationContext operationContext = null;
+
+ for (ListBlobItem blob : container.listBlobs(prefix, true,
EnumSet.of(BlobListingDetails.METADATA), blobRequestOptions, operationContext))
{
--- End diff --
Sure, done
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
