1#pragma once
2
3#include <Common/config.h>
4
5#if USE_HDFS
6#include <IO/ReadBuffer.h>
7#include <IO/BufferWithOwnMemory.h>
8#include <string>
9#include <memory>
10
11namespace DB
12{
13/** Accepts HDFS path to file and opens it.
14 * Closes file by himself (thus "owns" a file descriptor).
15 */
16class ReadBufferFromHDFS : public BufferWithOwnMemory<ReadBuffer>
17{
18 struct ReadBufferFromHDFSImpl;
19 std::unique_ptr<ReadBufferFromHDFSImpl> impl;
20public:
21 ReadBufferFromHDFS(const std::string & hdfs_name_, size_t buf_size = DBMS_DEFAULT_BUFFER_SIZE);
22 ReadBufferFromHDFS(ReadBufferFromHDFS &&) = default;
23
24 bool nextImpl() override;
25
26 ~ReadBufferFromHDFS() override;
27};
28}
29#endif
30