[GitHub] [nifi-minifi-cpp] adam-markovics commented on a change in pull request #1158: MINIFICPP-1616 Create PutAzureDatalakeStorage processor

[GitBox <gi...@apache.org>]

adam-markovics commented on a change in pull request #1158:
URL: https://github.com/apache/nifi-minifi-cpp/pull/1158#discussion_r710187633



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File path: extensions/azure/processors/PutAzureDataLakeStorage.cpp
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@@ -0,0 +1,167 @@
+/**
+ * @file PutAzureDataLakeStorage.cpp
+ * PutAzureDataLakeStorage class implementation
+ *
+ * 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.
+ */
+
+#include "PutAzureDataLakeStorage.h"
+
+#include "utils/ProcessorConfigUtils.h"
+#include "utils/gsl.h"
+#include "controllerservices/AzureStorageCredentialsService.h"
+
+namespace org::apache::nifi::minifi::azure::processors {
+
+const core::Property PutAzureDataLakeStorage::FilesystemName(
+    core::PropertyBuilder::createProperty("Filesystem Name")
+      ->withDescription("Name of the Azure Storage File System. It is assumed to be already existing.")
+      ->supportsExpressionLanguage(true)
+      ->isRequired(true)
+      ->build());
+const core::Property PutAzureDataLakeStorage::DirectoryName(
+    core::PropertyBuilder::createProperty("Directory Name")
+      ->withDescription("Name of the Azure Storage Directory. The Directory Name cannot contain a leading '/'. "
+                        "If left empty it designates the root directory. The directory will be created if not already existing.")
+      ->supportsExpressionLanguage(true)
+      ->build());
+const core::Property PutAzureDataLakeStorage::FileName(
+    core::PropertyBuilder::createProperty("File Name")
+      ->withDescription("The filename to be uploaded. If left empty the filename attribute will be used by default.")
+      ->supportsExpressionLanguage(true)
+      ->build());
+const core::Property PutAzureDataLakeStorage::ConflictResolutionStrategy(
+    core::PropertyBuilder::createProperty("Conflict Resolution Strategy")
+      ->withDescription("Indicates what should happen when a file with the same name already exists in the output directory.")
+      ->isRequired(true)
+      ->withDefaultValue<std::string>(toString(FileExistsResolutionStrategy::FAIL_FLOW))
+      ->withAllowableValues<std::string>(FileExistsResolutionStrategy::values())
+      ->build());
+
+const core::Relationship PutAzureDataLakeStorage::Success("success", "Files that have been successfully written to Azure storage are transferred to this relationship");
+const core::Relationship PutAzureDataLakeStorage::Failure("failure", "Files that could not be written to Azure storage for some reason are transferred to this relationship");
+
+void PutAzureDataLakeStorage::initialize() {
+  // Set the supported properties
+  updateSupportedProperties({
+    FilesystemName,
+    DirectoryName,
+    FileName,
+    ConflictResolutionStrategy
+  });
+  // Set the supported relationships
+  setSupportedRelationships({
+    Success,
+    Failure
+  });
+}
+
+void PutAzureDataLakeStorage::onSchedule(const std::shared_ptr<core::ProcessContext>& context, const std::shared_ptr<core::ProcessSessionFactory>& /*sessionFactory*/) {
+  connection_string_ = getConnectionStringFromControllerService(context);
+  if (connection_string_.empty()) {
+    throw Exception(PROCESS_SCHEDULE_EXCEPTION, "Azure Storage Credentials Service property missing or invalid");
+  }
+
+  conflict_resolution_strategy_ = FileExistsResolutionStrategy::parse(
+    utils::parsePropertyWithAllowableValuesOrThrow(*context, ConflictResolutionStrategy.getName(), FileExistsResolutionStrategy::values()).c_str());
+}
+
+std::optional<storage::PutAzureDataLakeStorageParameters> PutAzureDataLakeStorage::buildUploadParameters(
+    const std::shared_ptr<core::ProcessContext>& context, const std::shared_ptr<core::FlowFile>& flow_file) {
+  storage::PutAzureDataLakeStorageParameters params;
+  params.connection_string = connection_string_;
+  params.replace_file = conflict_resolution_strategy_ == FileExistsResolutionStrategy::REPLACE_FILE;
+
+  if (!context->getProperty(FilesystemName, params.file_system_name, flow_file) || params.file_system_name.empty()) {
+    logger_->log_error("Filesystem Name '%s' is invalid or empty!", params.file_system_name);
+    return std::nullopt;
+  }
+
+  context->getProperty(DirectoryName, params.directory_name, flow_file);
+
+  context->getProperty(FileName, params.filename, flow_file);
+  if (params.filename.empty() && (!flow_file->getAttribute("filename", params.filename) || params.filename.empty())) {
+    logger_->log_error("No File Name is set and default object key 'filename' attribute could not be found!");
+    return std::nullopt;
+  }
+
+  return params;
+}
+
+void PutAzureDataLakeStorage::onTrigger(const std::shared_ptr<core::ProcessContext>& context, const std::shared_ptr<core::ProcessSession>& session) {

Review comment:
       https://issues.apache.org/jira/browse/MINIFICPP-1566




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