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83 lines
3.3 KiB
83 lines
3.3 KiB
13 years ago
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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#ifndef PEEKPROCESSOR_H
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#define PEEKPROCESSOR_H
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#include <string>
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#include "thrift/lib/cpp/TProcessor.h"
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#include "thrift/lib/cpp/transport/TTransport.h"
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#include "thrift/lib/cpp/transport/TTransportUtils.h"
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#include "thrift/lib/cpp/transport/TBufferTransports.h"
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#include <boost/shared_ptr.hpp>
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namespace apache { namespace thrift { namespace processor {
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namespace server {
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class TConnectionContext;
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}
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/*
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* Class for peeking at the raw data that is being processed by another processor
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* and gives the derived class a chance to change behavior accordingly
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*
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*/
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class PeekProcessor : public apache::thrift::TProcessor {
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public:
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PeekProcessor();
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virtual ~PeekProcessor();
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// Input here: actualProcessor - the underlying processor
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// protocolFactory - the protocol factory used to wrap the memory buffer
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// transportFactory - this TPipedTransportFactory is used to wrap the source transport
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// via a call to getPipedTransport
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void initialize(boost::shared_ptr<apache::thrift::TProcessor> actualProcessor,
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boost::shared_ptr<apache::thrift::protocol::TProtocolFactory> protocolFactory,
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boost::shared_ptr<apache::thrift::transport::TPipedTransportFactory> transportFactory);
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boost::shared_ptr<apache::thrift::transport::TTransport> getPipedTransport(boost::shared_ptr<apache::thrift::transport::TTransport> in);
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void setTargetTransport(boost::shared_ptr<apache::thrift::transport::TTransport> targetTransport);
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virtual bool process(boost::shared_ptr<apache::thrift::protocol::TProtocol> in,
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boost::shared_ptr<apache::thrift::protocol::TProtocol> out,
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TConnectionContext* connectionContext);
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// The following three functions can be overloaded by child classes to
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// achieve desired peeking behavior
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virtual void peekName(const std::string& fname);
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virtual void peekBuffer(uint8_t* buffer, uint32_t size);
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virtual void peek(boost::shared_ptr<apache::thrift::protocol::TProtocol> in,
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apache::thrift::protocol::TType ftype,
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int16_t fid);
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virtual void peekEnd();
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private:
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boost::shared_ptr<apache::thrift::TProcessor> actualProcessor_;
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boost::shared_ptr<apache::thrift::protocol::TProtocol> pipedProtocol_;
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boost::shared_ptr<apache::thrift::transport::TPipedTransportFactory> transportFactory_;
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boost::shared_ptr<apache::thrift::transport::TMemoryBuffer> memoryBuffer_;
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boost::shared_ptr<apache::thrift::transport::TTransport> targetTransport_;
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};
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}}} // apache::thrift::processor
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#endif
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