| /* |
| * 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 PEEKPROCESSOR_H |
| #define PEEKPROCESSOR_H |
| |
| #include <string> |
| #include <TProcessor.h> |
| #include <transport/TTransport.h> |
| #include <transport/TTransportUtils.h> |
| #include <transport/TBufferTransports.h> |
| #include <boost/shared_ptr.hpp> |
| |
| namespace apache { namespace thrift { namespace processor { |
| |
| /* |
| * Class for peeking at the raw data that is being processed by another processor |
| * and gives the derived class a chance to change behavior accordingly |
| * |
| */ |
| class PeekProcessor : public apache::thrift::TProcessor { |
| |
| public: |
| PeekProcessor(); |
| virtual ~PeekProcessor(); |
| |
| // Input here: actualProcessor - the underlying processor |
| // protocolFactory - the protocol factory used to wrap the memory buffer |
| // transportFactory - this TPipedTransportFactory is used to wrap the source transport |
| // via a call to getPipedTransport |
| void initialize(boost::shared_ptr<apache::thrift::TProcessor> actualProcessor, |
| boost::shared_ptr<apache::thrift::protocol::TProtocolFactory> protocolFactory, |
| boost::shared_ptr<apache::thrift::transport::TPipedTransportFactory> transportFactory); |
| |
| boost::shared_ptr<apache::thrift::transport::TTransport> getPipedTransport(boost::shared_ptr<apache::thrift::transport::TTransport> in); |
| |
| void setTargetTransport(boost::shared_ptr<apache::thrift::transport::TTransport> targetTransport); |
| |
| virtual bool process(boost::shared_ptr<apache::thrift::protocol::TProtocol> in, |
| boost::shared_ptr<apache::thrift::protocol::TProtocol> out); |
| |
| // The following three functions can be overloaded by child classes to |
| // achieve desired peeking behavior |
| virtual void peekName(const std::string& fname); |
| virtual void peekBuffer(uint8_t* buffer, uint32_t size); |
| virtual void peek(boost::shared_ptr<apache::thrift::protocol::TProtocol> in, |
| apache::thrift::protocol::TType ftype, |
| int16_t fid); |
| virtual void peekEnd(); |
| |
| private: |
| boost::shared_ptr<apache::thrift::TProcessor> actualProcessor_; |
| boost::shared_ptr<apache::thrift::protocol::TProtocol> pipedProtocol_; |
| boost::shared_ptr<apache::thrift::transport::TPipedTransportFactory> transportFactory_; |
| boost::shared_ptr<apache::thrift::transport::TMemoryBuffer> memoryBuffer_; |
| boost::shared_ptr<apache::thrift::transport::TTransport> targetTransport_; |
| }; |
| |
| }}} // apache::thrift::processor |
| |
| #endif |