| /** |
| * |
| * 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 NIFI_MINIFI_CPP_BUFFERREADER_H |
| #define NIFI_MINIFI_CPP_BUFFERREADER_H |
| |
| #include "FlowFileRecord.h" |
| |
| class BufferReader : public org::apache::nifi::minifi::InputStreamCallback { |
| public: |
| explicit BufferReader(std::vector<uint8_t>& buffer) : buffer_(buffer){} |
| |
| int write(org::apache::nifi::minifi::io::BaseStream& input, std::size_t len) { |
| uint8_t tmpBuffer[4096]{}; |
| std::size_t remaining_len = len; |
| int total_read = 0; |
| while (remaining_len > 0) { |
| auto ret = input.read(tmpBuffer, std::min(remaining_len, sizeof(tmpBuffer))); |
| if (ret == 0) break; |
| if (ret < 0) return ret; |
| remaining_len -= ret; |
| total_read += ret; |
| auto prevSize = buffer_.size(); |
| buffer_.resize(prevSize + ret); |
| std::move(tmpBuffer, tmpBuffer + ret, buffer_.data() + prevSize); |
| } |
| return total_read; |
| } |
| |
| int64_t process(std::shared_ptr<org::apache::nifi::minifi::io::BaseStream> stream) { |
| return write(*stream.get(), stream->size()); |
| } |
| |
| private: |
| std::vector<uint8_t>& buffer_; |
| }; |
| |
| #endif // NIFI_MINIFI_CPP_BUFFERREADER_H |