#pragma once #include #include #include namespace Poco { class Logger; } namespace DB { class FileLogSource : public SourceWithProgress { public: FileLogSource( StorageFileLog & storage_, const StorageMetadataPtr & metadata_snapshot_, const ContextPtr & context_, const Names & columns, size_t max_block_size_, size_t poll_time_out_, size_t stream_number_, size_t max_streams_number_); String getName() const override { return "FileLog"; } bool noRecords() { return !buffer || buffer->noRecords(); } void onFinish(); virtual ~FileLogSource() override; protected: Chunk generate() override; private: StorageFileLog & storage; StorageMetadataPtr metadata_snapshot; ContextPtr context; Names column_names; UInt64 max_block_size; size_t poll_time_out; size_t stream_number; size_t max_streams_number; std::unique_ptr buffer; Block non_virtual_header; Block virtual_header; /// The start pos and end pos of files responsible by this stream, /// does not include end size_t start; size_t end; }; }