greenplumn s3common_reader 代码
文件路径：/gpcontrib/gpcloud/include/s3common_reader.h
#ifndef INCLUDE_S3COMMON_READER_H_
#define INCLUDE_S3COMMON_READER_H_
#include "decompress_reader.h"
#include "s3common_headers.h"
#include "s3exception.h"
#include "s3key_reader.h"
class S3CommonReader : public Reader {
public:
S3CommonReader() : upstreamReader(NULL), s3InterfaceService(NULL) {
}
virtual ~S3CommonReader() {
this->close();
}
virtual void open(const S3Params& params);
/ read() attempts to read up to count bytes into the buffer.
/ Return 0 if EOF. Throw exception if encounters errors.
virtual uint64_t read(char* buf, uint64_t count);
/ This should be reentrant, has no side effects when called multiple times.
virtual void close();
/ Used by Mock, DO NOT call it in other places.
void setS3InterfaceService(S3Interface* s3InterfaceService) {
this->s3InterfaceService = s3InterfaceService;
}
protected:
Reader* upstreamReader;
S3Interface* s3InterfaceService;
S3KeyReader keyReader;
DecompressReader decompressReader;
};
#endif /* INCLUDE_S3COMMON_READER_H_ */