| 30 |
ashish |
1 |
/*
|
|
|
2 |
* Licensed to the Apache Software Foundation (ASF) under one
|
|
|
3 |
* or more contributor license agreements. See the NOTICE file
|
|
|
4 |
* distributed with this work for additional information
|
|
|
5 |
* regarding copyright ownership. The ASF licenses this file
|
|
|
6 |
* to you under the Apache License, Version 2.0 (the
|
|
|
7 |
* "License"); you may not use this file except in compliance
|
|
|
8 |
* with the License. You may obtain a copy of the License at
|
|
|
9 |
*
|
|
|
10 |
* http://www.apache.org/licenses/LICENSE-2.0
|
|
|
11 |
*
|
|
|
12 |
* Unless required by applicable law or agreed to in writing,
|
|
|
13 |
* software distributed under the License is distributed on an
|
|
|
14 |
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
|
|
15 |
* KIND, either express or implied. See the License for the
|
|
|
16 |
* specific language governing permissions and limitations
|
|
|
17 |
* under the License.
|
|
|
18 |
*/
|
|
|
19 |
|
|
|
20 |
#ifndef PEEKPROCESSOR_H
|
|
|
21 |
#define PEEKPROCESSOR_H
|
|
|
22 |
|
|
|
23 |
#include <string>
|
|
|
24 |
#include <TProcessor.h>
|
|
|
25 |
#include <transport/TTransport.h>
|
|
|
26 |
#include <transport/TTransportUtils.h>
|
|
|
27 |
#include <transport/TBufferTransports.h>
|
|
|
28 |
#include <boost/shared_ptr.hpp>
|
|
|
29 |
|
|
|
30 |
namespace apache { namespace thrift { namespace processor {
|
|
|
31 |
|
|
|
32 |
/*
|
|
|
33 |
* Class for peeking at the raw data that is being processed by another processor
|
|
|
34 |
* and gives the derived class a chance to change behavior accordingly
|
|
|
35 |
*
|
|
|
36 |
*/
|
|
|
37 |
class PeekProcessor : public apache::thrift::TProcessor {
|
|
|
38 |
|
|
|
39 |
public:
|
|
|
40 |
PeekProcessor();
|
|
|
41 |
virtual ~PeekProcessor();
|
|
|
42 |
|
|
|
43 |
// Input here: actualProcessor - the underlying processor
|
|
|
44 |
// protocolFactory - the protocol factory used to wrap the memory buffer
|
|
|
45 |
// transportFactory - this TPipedTransportFactory is used to wrap the source transport
|
|
|
46 |
// via a call to getPipedTransport
|
|
|
47 |
void initialize(boost::shared_ptr<apache::thrift::TProcessor> actualProcessor,
|
|
|
48 |
boost::shared_ptr<apache::thrift::protocol::TProtocolFactory> protocolFactory,
|
|
|
49 |
boost::shared_ptr<apache::thrift::transport::TPipedTransportFactory> transportFactory);
|
|
|
50 |
|
|
|
51 |
boost::shared_ptr<apache::thrift::transport::TTransport> getPipedTransport(boost::shared_ptr<apache::thrift::transport::TTransport> in);
|
|
|
52 |
|
|
|
53 |
void setTargetTransport(boost::shared_ptr<apache::thrift::transport::TTransport> targetTransport);
|
|
|
54 |
|
|
|
55 |
virtual bool process(boost::shared_ptr<apache::thrift::protocol::TProtocol> in,
|
|
|
56 |
boost::shared_ptr<apache::thrift::protocol::TProtocol> out);
|
|
|
57 |
|
|
|
58 |
// The following three functions can be overloaded by child classes to
|
|
|
59 |
// achieve desired peeking behavior
|
|
|
60 |
virtual void peekName(const std::string& fname);
|
|
|
61 |
virtual void peekBuffer(uint8_t* buffer, uint32_t size);
|
|
|
62 |
virtual void peek(boost::shared_ptr<apache::thrift::protocol::TProtocol> in,
|
|
|
63 |
apache::thrift::protocol::TType ftype,
|
|
|
64 |
int16_t fid);
|
|
|
65 |
virtual void peekEnd();
|
|
|
66 |
|
|
|
67 |
private:
|
|
|
68 |
boost::shared_ptr<apache::thrift::TProcessor> actualProcessor_;
|
|
|
69 |
boost::shared_ptr<apache::thrift::protocol::TProtocol> pipedProtocol_;
|
|
|
70 |
boost::shared_ptr<apache::thrift::transport::TPipedTransportFactory> transportFactory_;
|
|
|
71 |
boost::shared_ptr<apache::thrift::transport::TMemoryBuffer> memoryBuffer_;
|
|
|
72 |
boost::shared_ptr<apache::thrift::transport::TTransport> targetTransport_;
|
|
|
73 |
};
|
|
|
74 |
|
|
|
75 |
}}} // apache::thrift::processor
|
|
|
76 |
|
|
|
77 |
#endif
|