| /** |
| * @file PublishKafka.h |
| * PublishKafka class declaration |
| * |
| * 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. |
| */ |
| #ifndef EXTENSIONS_LIBRDKAFKA_PUBLISHKAFKA_H_ |
| #define EXTENSIONS_LIBRDKAFKA_PUBLISHKAFKA_H_ |
| |
| #include <atomic> |
| #include <cstdint> |
| #include <map> |
| #include <memory> |
| #include <mutex> |
| #include <set> |
| #include <string> |
| #include <condition_variable> |
| #include <utility> |
| #include <vector> |
| |
| #include "utils/GeneralUtils.h" |
| #include "FlowFileRecord.h" |
| #include "core/Processor.h" |
| #include "core/ProcessSession.h" |
| #include "core/Core.h" |
| #include "core/Resource.h" |
| #include "core/Property.h" |
| #include "core/logging/LoggerConfiguration.h" |
| #include "core/logging/Logger.h" |
| #include "utils/RegexUtils.h" |
| #include "rdkafka.h" |
| #include "KafkaConnection.h" |
| |
| namespace org { |
| namespace apache { |
| namespace nifi { |
| namespace minifi { |
| namespace processors { |
| |
| // PublishKafka Class |
| class PublishKafka : public core::Processor { |
| public: |
| static constexpr char const* ProcessorName = "PublishKafka"; |
| |
| // Supported Properties |
| static const core::Property SeedBrokers; |
| static const core::Property Topic; |
| static const core::Property DeliveryGuarantee; |
| static const core::Property MaxMessageSize; |
| static const core::Property RequestTimeOut; |
| static const core::Property MessageTimeOut; |
| static const core::Property ClientName; |
| static const core::Property BatchSize; |
| static const core::Property TargetBatchPayloadSize; |
| static const core::Property AttributeNameRegex; |
| static const core::Property QueueBufferMaxTime; |
| static const core::Property QueueBufferMaxSize; |
| static const core::Property QueueBufferMaxMessage; |
| static const core::Property CompressCodec; |
| static const core::Property MaxFlowSegSize; |
| static const core::Property SecurityProtocol; |
| static const core::Property SecurityCA; |
| static const core::Property SecurityCert; |
| static const core::Property SecurityPrivateKey; |
| static const core::Property SecurityPrivateKeyPassWord; |
| static const core::Property KerberosServiceName; |
| static const core::Property KerberosPrincipal; |
| static const core::Property KerberosKeytabPath; |
| static const core::Property KafkaKey; |
| static const core::Property MessageKeyField; |
| static const core::Property DebugContexts; |
| static const core::Property FailEmptyFlowFiles; |
| |
| // Supported Relationships |
| static const core::Relationship Failure; |
| static const core::Relationship Success; |
| |
| explicit PublishKafka(std::string name, utils::Identifier uuid = utils::Identifier()) |
| : core::Processor(std::move(name), uuid) { |
| } |
| |
| ~PublishKafka() override = default; |
| |
| bool supportsDynamicProperties() override { return true; } |
| |
| /** |
| * Function that's executed when the processor is scheduled. |
| * @param context process context. |
| * @param sessionFactory process session factory that is used when creating |
| * ProcessSession objects. |
| */ |
| void onTrigger(const std::shared_ptr<core::ProcessContext> &context, const std::shared_ptr<core::ProcessSession> &session) override; |
| void initialize() override; |
| void onSchedule(const std::shared_ptr<core::ProcessContext> &context, const std::shared_ptr<core::ProcessSessionFactory> &sessionFactory) override; |
| void notifyStop() override; |
| |
| class Messages; |
| |
| protected: |
| bool configureNewConnection(const std::shared_ptr<core::ProcessContext> &context); |
| bool createNewTopic(const std::shared_ptr<core::ProcessContext> &context, const std::string& topic_name, const std::shared_ptr<core::FlowFile>& flow_file); |
| |
| private: |
| std::shared_ptr<logging::Logger> logger_{logging::LoggerFactory<PublishKafka>::getLogger()}; |
| |
| KafkaConnectionKey key_; |
| std::unique_ptr<KafkaConnection> conn_; |
| std::mutex connection_mutex_; |
| |
| uint32_t batch_size_{}; |
| uint64_t target_batch_payload_size_{}; |
| uint64_t max_flow_seg_size_{}; |
| utils::Regex attributeNameRegex_; |
| |
| std::atomic<bool> interrupted_{false}; |
| std::mutex messages_mutex_; // If both connection_mutex_ and messages_mutex_ are needed, always take connection_mutex_ first to avoid deadlock |
| std::set<std::shared_ptr<Messages>> messages_set_; |
| }; |
| |
| REGISTER_RESOURCE(PublishKafka, "This Processor puts the contents of a FlowFile to a Topic in Apache Kafka. The content of a FlowFile becomes the contents of a Kafka message. " |
| "This message is optionally assigned a key by using the <Kafka Key> Property."); |
| |
| } // namespace processors |
| } // namespace minifi |
| } // namespace nifi |
| } // namespace apache |
| } // namespace org |
| |
| #endif // EXTENSIONS_LIBRDKAFKA_PUBLISHKAFKA_H_ |