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Showing content from http://www.ncbi.nlm.nih.gov/IEB/ToolBox/CPP_DOC/doxyhtml/structSNetStorage__NetCacheBlob.html below:

NCBI C++ ToolKit: SNetStorage_NetCacheBlob Struct Reference

Search Toolkit Book for SNetStorage_NetCacheBlob

#include "netstorage_direct_nc.hpp"
(Private to src/connect/services.)

SNetStorage_NetCacheBlob (SNetStorageObjectImpl &fsm, CNetCacheAPI::TInstance netcache_api, const string &blob_key) ERW_Result Read (void *buf, size_t count, size_t *bytes_read) override Read as many as "count" bytes into a buffer pointed to by the "buf" argument. More...
ERW_Result PendingCount (size_t *count) override Via parameter "count" (which is guaranteed to be supplied non-NULL) return the number of bytes that are ready to be read from the input device without blocking. More...
ERW_Result Write (const void *buf, size_t count, size_t *bytes_written) override Write up to "count" bytes from the buffer pointed to by the "buf" argument onto the output device. More...
ERW_Result Flush () override Flush pending data (if any) down to the output device. More...
void Close () override void Abort () override string GetLoc () const override bool Eof () override Uint8 GetSize () override list< string > GetAttributeList () const override string GetAttribute (const string &attr_name) const override void SetAttribute (const string &attr_name, const string &attr_value) override CNetStorageObjectInfo GetInfo () override void SetExpiration (const CTimeout &) override string FileTrack_Path () override string Relocate (TNetStorageFlags flags, TNetStorageProgressCb cb) override bool Exists () override ENetStorageRemoveResult Remove () override void StartWriting () virtual pair< string, string > GetUserInfo () virtual CNetStorageObjectLoc & Locator () virtual void CancelRelocate () virtual ERW_Result Pushback (const void *buf, size_t count, void *del_ptr=0) This method gets called by RStream buffer destructor to return buffered yet still unread (from the stream) portion of data back to the device. More...
virtual ~IReader () virtual ~IWriter ()

Definition at line 41 of file netstorage_direct_nc.hpp.

◆ SNetStorage_NetCacheBlob() ◆ Abort() void SNetStorage_NetCacheBlob::Abort ( void ) overridevirtual ◆ Close() void SNetStorage_NetCacheBlob::Close ( void ) overridevirtual ◆ Eof() bool SNetStorage_NetCacheBlob::Eof ( void ) overridevirtual ◆ Exists() bool SNetStorage_NetCacheBlob::Exists ( void ) overridevirtual ◆ FileTrack_Path() string SNetStorage_NetCacheBlob::FileTrack_Path ( ) overridevirtual ◆ Flush() ◆ GetAttribute() ◆ GetAttributeList() list< string > SNetStorage_NetCacheBlob::GetAttributeList ( ) const overridevirtual ◆ GetInfo()

Implements INetStorageObjectState.

Definition at line 164 of file netstorage_direct_nc.cpp.

References CJsonNode::AsInteger(), eNFL_NetCache, eNFL_NotFound, CNetStorageException::eNotExists, NStr::fSplit_ByPattern, g_CreateNetStorageObjectInfo(), CNetCacheAPI::GetBlobInfo(), CNetCacheAPI::GetBlobSize(), CJsonNode::GetByKeyOrNull(), CException::GetErrCode(), CJsonNode::GuessType(), CNetCacheAPI::HasBlob(), CJsonNode::IsInteger(), ncbi::grid::netcache::search::fields::key, m_BlobKey, m_NetCacheAPI, NETSTORAGE_CONVERT_NETCACHEEXCEPTION, CJsonNode::NewObjectNode(), NULL, output, CJsonNode::SetByKey(), NStr::SplitInTwo(), and val.

◆ GetLoc() string SNetStorage_NetCacheBlob::GetLoc ( void ) const inlineoverridevirtual ◆ GetSize() Uint8 SNetStorage_NetCacheBlob::GetSize ( void ) overridevirtual ◆ PendingCount() ERW_Result SNetStorage_NetCacheBlob::PendingCount ( size_t * count ) overridevirtual

Via parameter "count" (which is guaranteed to be supplied non-NULL) return the number of bytes that are ready to be read from the input device without blocking.

Return eRW_Success if the number of pending bytes has been stored at the location pointed to by "count". Return eRW_NotImplemented if the number cannot be determined. Otherwise, return other eRW_... condition to reflect the problem ("*count" does not need to be updated in the case of non-eRW_Success). Note that if reporting 0 bytes ready, the method may return either both eRW_Success and zero "*count", or return eRW_NotImplemented alone.

Implements IReader.

Definition at line 78 of file netstorage_direct_nc.cpp.

References count, and eRW_Success.

◆ Read() ERW_Result SNetStorage_NetCacheBlob::Read ( void * buf, size_t count, size_t * bytes_read ) overridevirtual

Read as many as "count" bytes into a buffer pointed to by the "buf" argument.

Always store the number of bytes actually read (0 if read none) via the pointer "bytes_read", if provided non-NULL. Return non-eRW_Success code if EOF / error condition has been encountered during the operation (some data may have been read, nevertheless, and reflected in "*bytes_read"). Special case: if "count" is passed as 0, then the value of "buf" must be ignored, and no change should be made to the state of the input device (but may return non-eRW_Success to indicate that the input device has already been in an error condition).

Note: Apparently, may not return eRW_Success if hasn't been able to read "count" bytes as requested, and "bytes_read" was provided as NULL.; When returning "*bytes_read" as zero for a non-zero "count" requested, the return status should not indicate eRW_Success.

Warning: "*bytes_read" may never be returned greater than "count".

Attention: It is implementation-dependent whether the call blocks until the entire buffer is read or the call returns when at least some data are available. In general, it is advised that this call is made within a loop that checks for EOF condition and proceeds with the reading until the required amount of data has been retrieved.

Implements IReader.

Definition at line 48 of file netstorage_direct_nc.cpp.

References buffer, INetStorageObjectState::EnterState(), SNetCacheAPIImpl::GetPartReader(), m_BlobKey, m_IState, m_NetCacheAPI, and NETSTORAGE_CONVERT_NETCACHEEXCEPTION.

◆ Relocate() ◆ Remove() ◆ SetAttribute() ◆ SetExpiration() void SNetStorage_NetCacheBlob::SetExpiration ( const CTimeout & ttl ) overridevirtual ◆ StartWriting() void SNetStorage_NetCacheBlob::StartWriting ( ) ◆ Write() ERW_Result SNetStorage_NetCacheBlob::Write ( const void * buf, size_t count, size_t * bytes_written ) overridevirtual

Write up to "count" bytes from the buffer pointed to by the "buf" argument onto the output device.

Always store the number of bytes actually written, or 0 if "count" has been passed as 0 ("buf" must be ignored in this case), via the "bytes_written" pointer, if provided non-NULL. Note that the method can return non-eRW_Success in case of an I/O error along with indicating (some) data delivered to the output device (and reflected in "*bytes_written").

Note: Apparently, may not return eRW_Success if hasn't been able to write "count" bytes as requested, and "bytes_written" was passed as NULL.; When returning "*bytes_written" as zero for a non-zero "count" requested, the return status should not indicate eRW_Success.

Warning: "*bytes_written" may never be returned greater than "count".

Attention: It is implementation-dependent whether the call blocks until the entire buffer or only some data has been written out. In general, it is advised that this call is made within a loop that checks for errors and proceeds with the writing until the required amount of data has been sent.

Implements IWriter.

Definition at line 109 of file netstorage_direct_nc.cpp.

References m_OState, and StartWriting().

◆ m_BlobKey string SNetStorage_NetCacheBlob::m_BlobKey private

Definition at line 119 of file netstorage_direct_nc.hpp.

Referenced by Exists(), FileTrack_Path(), GetAttribute(), GetAttributeList(), GetInfo(), GetLoc(), GetSize(), Read(), Relocate(), Remove(), SetAttribute(), SetExpiration(), StartWriting(), and SNetStorage_NetCacheBlob::SOState::Write().

◆ m_IState ◆ m_NetCacheAPI ◆ m_OState

The documentation for this struct was generated from the following files:

src/connect/services/netstorage_direct_nc.hpp
src/connect/services/netstorage_direct_nc.cpp

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