Lfs ---> LfsClientLocalImp

最新推荐文章于 2025-09-09 03:40:46 发布

原创最新推荐文章于 2025-09-09 03:40:46 发布 · 474 阅读

CC 4.0 BY-SA版权

文章标签：

6 篇文章

订阅专栏

本文详细介绍了LFS客户端本地实现的内部实现细节，包括初始化、文件打开、关闭、读写等核心功能。

#ifndef LFS_CLIENT_LOCAL_IMP_H

#define  LFS_CLIENT_LOCAL_IMPH

#include "CommonDefine.h"

namespace lfs {

class LfsClientLocalImp

public:

	int Initialize(const char* nsAddr = NULL);

	int Close(const int fd);

	int Open(const char* fileName, const int flags);

	int Write(const int fd, const void* data, int64_t count);

	int Read(const int fd, void* buf, const int64_t count);

	int Unlink(const char* fileName);

	int Fstat(const int fd, common::FileInfo& buf);

	int64_t SaveFile(char* fileName, const char* localFile, const int32_t flag, const char* nsAddr = NULL);

	int FetchFile(const char* localFile, const char* fileName, const char* nsAddr = NULL);

};

} // Namespace lfs

#endif

#include "LfsClientLocalImp.h"

#include <sys/types.h>

#include <sys/stat.h>

#include <fcntl.h>

#include <unistd.h>

#include  "Log.h"

namespace lfs{

int LfsClientLocalImp::Initialize(const char* nsAddr)

	LOG_INFO("Initialized");

	// Global Namespace Init --> Maybe read from Config file

	return 0;

int LfsClientLocalImp::Close(const int fd)

	if(fd < 0)

		LOG_ERROR("fd error!");

		return -1;

	return ::close(fd);

int LfsClientLocalImp::Open(const char* fileName, const int flags)

	if(fileName == NULL)

		LOG_ERROR("file Name NULL");

		return -1;

	return ::open(fileName, flags);

int LfsClientLocalImp::Write(const int fd, const void* data, int64_t count)

	if(fd < 0 || data == NULL || count < 0)

		LOG_ERROR("fd error or data NULL or count < 0!");

		return -1;

	return ::write(fd, data, count);

int LfsClientLocalImp::Read(const int fd, void* buf, const int64_t count)

	if(fd < 0 || buf == NULL || count < 0)

		LOG_ERROR("fd error or data NULL or count < 0!");

		return -1;

	return ::read(fd, buf, count);

int LfsClientLocalImp::Unlink(const char* fileName)

	if(fileName == NULL)

		LOG_ERROR("fileName NULL");

		return -1;

	return unlink(fileName);

int LfsClientLocalImp::Fstat(const int fd, common::FileInfo& buf)

	struct stat fst;

	int ret = ::fstat(fd, &fst);

	if(ret != 0 )

		LOG_ERROR("get the file info error from OS!");

		return -1;

	buf.ID = fst.st_ino;

	buf.Size = fst.st_size;

    buf.UsedSize = fst.st_blksize * fst.st_blocks;

    buf.ModifyTime = fst.st_mtime;

    buf.CreateTime = fst.st_ctime;

	return 0;

int64_t LfsClientLocalImp::SaveFile(char* fileName, const char* localFile, const int32_t flag, const char* nsAddr)

	LOG_INFO("Not Support, save file....");

	return 0;

int LfsClientLocalImp::FetchFile(const char* localFile, const char* fileName, const char* nsAddr)

	LOG_INFO("Not Support, fetch file....");

	return 0;

}/* end namespace lfs */