xrootd
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Downloads original file into multiple files, chunked into blocks. Only blocks that are asked for are downloaded. Handles read requests as they come along. More...
#include <XrdPfcIOFileBlock.hh>
Public Member Functions | |
IOFileBlock (XrdOucCacheIO *io, Cache &cache) | |
~IOFileBlock () | |
bool | ioActive () override |
Abstract virtual method of XrdPfc::IO Called to check if destruction needs to be done in a separate task. | |
void | DetachFinalize () override |
Abstract virtual method of XrdPfc::IO Called to destruct the IO object after it is no longer used. | |
int | Read (char *Buffer, long long Offset, int Length) override |
int | Fstat (struct stat &sbuff) override |
long long | FSize () override |
void | Update (XrdOucCacheIO &iocp) override |
virtual int | Read (char *buff, long long offs, int rlen)=0 |
Pass Read request to the corresponding File object. | |
virtual void | Read (XrdOucCacheIOCB &iocb, char *buff, long long offs, int rlen) |
Pass Read request to the corresponding File object. | |
Public Member Functions inherited from XrdPfc::IO | |
IO (XrdOucCacheIO *io, Cache &cache) | |
virtual XrdOucCacheIO * | Base () |
Original data source. | |
const char * | Path () override |
Original data source URL. | |
int | Sync () override |
int | Trunc (long long Offset) override |
int | Write (char *Buffer, long long Offset, int Length) override |
bool | Detach (XrdOucCacheIOCD &iocdP) final |
const char * | GetLocation () |
XrdSysTrace * | GetTrace () |
XrdOucCacheIO * | GetInput () |
virtual int | Sync ()=0 |
virtual void | Sync (XrdOucCacheIOCB &iocb) |
virtual int | Trunc (long long offs)=0 |
virtual void | Trunc (XrdOucCacheIOCB &iocb, long long offs) |
virtual int | Write (char *buff, long long offs, int wlen)=0 |
virtual void | Write (XrdOucCacheIOCB &iocb, char *buff, long long offs, int wlen) |
Public Member Functions inherited from XrdOucCacheIO | |
virtual const char * | Location (bool refresh=false) |
virtual int | pgRead (char *buff, long long offs, int rdlen, std::vector< uint32_t > &csvec, uint64_t opts=0, int *csfix=0) |
virtual void | pgRead (XrdOucCacheIOCB &iocb, char *buff, long long offs, int rdlen, std::vector< uint32_t > &csvec, uint64_t opts=0, int *csfix=0) |
virtual int | pgWrite (char *buff, long long offs, int wrlen, std::vector< uint32_t > &csvec, uint64_t opts=0, int *csfix=0) |
virtual void | pgWrite (XrdOucCacheIOCB &iocb, char *buff, long long offs, int wrlen, std::vector< uint32_t > &csvec, uint64_t opts=0, int *csfix=0) |
virtual void | Preread (long long offs, int rlen, int opts=0) |
virtual void | Preread (aprParms &Parms) |
virtual int | ReadV (const XrdOucIOVec *readV, int rnum) |
virtual void | ReadV (XrdOucCacheIOCB &iocb, const XrdOucIOVec *readV, int rnum) |
virtual int | WriteV (const XrdOucIOVec *writV, int wnum) |
virtual void | WriteV (XrdOucCacheIOCB &iocb, const XrdOucIOVec *writV, int wnum) |
XrdOucCacheIO () | |
Construct and Destructor. | |
Private Member Functions | |
void | GetBlockSizeFromPath () |
int | initLocalStat () |
File * | newBlockFile (long long off, int blocksize) |
void | CloseInfoFile () |
Private Attributes | |
long long | m_blocksize |
size of file-block | |
std::map< int, File * > | m_blocks |
map of created blocks | |
XrdSysMutex | m_mutex |
map mutex | |
struct stat * | m_localStat |
Info | m_info |
XrdOssDF * | m_info_file |
Additional Inherited Members | |
Static Public Attributes inherited from XrdOucCacheIO | |
static const uint64_t | forceCS = 0x0000000000000001ULL |
static const int | SingleUse = 0x0001 |
Mark pages for single use. | |
Protected Member Functions inherited from XrdPfc::IO | |
const char * | GetPath () |
std::string | GetFilename () |
const char * | RefreshLocation () |
unsigned short | ObtainReadSid () |
Protected Member Functions inherited from XrdOucCacheIO | |
virtual | ~XrdOucCacheIO () |
Protected Attributes inherited from XrdPfc::IO | |
Cache & | m_cache |
reference to Cache object | |
const char * | m_traceID |
RAtomic_int | m_active_read_reqs |
number of active read requests | |
Downloads original file into multiple files, chunked into blocks. Only blocks that are asked for are downloaded. Handles read requests as they come along.
XrdPfc::IOFileBlock::IOFileBlock | ( | XrdOucCacheIO * | io, |
Cache & | cache | ||
) |
XrdPfc::IOFileBlock::~IOFileBlock | ( | ) |
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overridevirtual |
Abstract virtual method of XrdPfc::IO Called to destruct the IO object after it is no longer used.
Implements XrdPfc::IO.
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overridevirtual |
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overridevirtual |
Perform an fstat() operation (defaults to passthrough).
sbuff | reference to the stat buffer to be filled in. Only fields st_size, st_blocks, st_mtime (st_atime and st_ctime may be set to st_mtime), st_ino, and st_mode need to be set. All other fields are preset and should not be changed. |
Reimplemented from XrdOucCacheIO.
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overridevirtual |
Abstract virtual method of XrdPfc::IO Called to check if destruction needs to be done in a separate task.
Implements XrdPfc::IO.
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Pass Read request to the corresponding File object.
Implements XrdOucCacheIO.
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overridevirtual |
Perform an synchronous read.
buff | pointer to the buffer to receive the results. The buffer must remain valid until the callback is invoked. |
offs | the offset into the file. |
rlen | the number of bytes to read. |
Implements XrdOucCacheIO.
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inlinevirtual |
Pass Read request to the corresponding File object.
Reimplemented from XrdOucCacheIO.
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overridevirtual |
Update the originally passed XrdOucCacheIO object with the object passed. All future uses underlying XrdOucCacheIO object must now use this object. Update() is called when Prepare() indicated that the file should not be physically opened and a file method was invoked in the XrdOucCacheIO passed to Attach(). When this occurs, the file is actually opened and Update() called to replace the original XrdOucCacheIO object with one that uses the newly opened file.
iocp | reference to the new XrdOucCacheIO object. |
Reimplemented from XrdPfc::IO.
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map of created blocks
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size of file-block
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map mutex