| /** |
| * |
| * 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 LIBMINIFI_INCLUDE_IO_TLS_FILESTREAM_H_ |
| #define LIBMINIFI_INCLUDE_IO_TLS_FILESTREAM_H_ |
| |
| #include <iostream> |
| #include <cstdint> |
| #include <string> |
| #include "EndianCheck.h" |
| #include "BaseStream.h" |
| #include "Serializable.h" |
| #include "core/logging/LoggerConfiguration.h" |
| |
| namespace org { |
| namespace apache { |
| namespace nifi { |
| namespace minifi { |
| namespace io { |
| |
| /** |
| * Purpose: File Stream Base stream extension. This is intended to be a thread safe access to |
| * read/write to the local file system. |
| * |
| * Design: Simply extends BaseStream and overrides readData/writeData to allow a sink to the |
| * fstream object. |
| */ |
| class FileStream : public io::BaseStream { |
| public: |
| /** |
| * File Stream constructor that accepts an fstream shared pointer. |
| * It must already be initialized for read and write. |
| */ |
| explicit FileStream(const std::string &path, uint32_t offset, bool write_enable = false); |
| |
| /** |
| * File Stream constructor that accepts an fstream shared pointer. |
| * It must already be initialized for read and write. |
| */ |
| explicit FileStream(const std::string &path); |
| |
| virtual ~FileStream() { |
| closeStream(); |
| } |
| |
| virtual void closeStream(); |
| /** |
| * Skip to the specified offset. |
| * @param offset offset to which we will skip |
| */ |
| void seek(uint64_t offset); |
| |
| const uint64_t getSize() const { |
| return length_; |
| } |
| |
| // data stream extensions |
| /** |
| * Reads data and places it into buf |
| * @param buf buffer in which we extract data |
| * @param buflen |
| */ |
| virtual int readData(std::vector<uint8_t> &buf, int buflen); |
| /** |
| * Reads data and places it into buf |
| * @param buf buffer in which we extract data |
| * @param buflen |
| */ |
| virtual int readData(uint8_t *buf, int buflen); |
| |
| /** |
| * Write value to the stream using std::vector |
| * @param buf incoming buffer |
| * @param buflen buffer to write |
| * |
| */ |
| virtual int writeData(std::vector<uint8_t> &buf, int buflen); |
| |
| /** |
| * writes value to stream |
| * @param value value to write |
| * @param size size of value |
| */ |
| virtual int writeData(uint8_t *value, int size); |
| |
| /** |
| * Returns the underlying buffer |
| * @return vector's array |
| **/ |
| const uint8_t *getBuffer() const { |
| throw std::runtime_error("Stream does not support this operation"); |
| } |
| |
| protected: |
| |
| /** |
| * Creates a vector and returns the vector using the provided |
| * type name. |
| * @param t incoming object |
| * @returns vector. |
| */ |
| template<typename T> |
| std::vector<uint8_t> readBuffer(const T&); |
| std::recursive_mutex file_lock_; |
| std::unique_ptr<std::fstream> file_stream_; |
| size_t offset_; |
| std::string path_; |
| size_t length_; |
| |
| private: |
| |
| std::shared_ptr<logging::Logger> logger_; |
| |
| }; |
| |
| } /* namespace io */ |
| } /* namespace minifi */ |
| } /* namespace nifi */ |
| } /* namespace apache */ |
| } /* namespace org */ |
| |
| #endif /* LIBMINIFI_INCLUDE_IO_TLS_FILESTREAM_H_ */ |