Arcane::FileHashDatabase Class Reference

Hash database implemented as a file system. More...

Inheritance diagram for Arcane::FileHashDatabase:

Collaboration diagram for Arcane::FileHashDatabase:

Classes
struct	DirFileInfo
	Name of the directory and file containing the hash. More...

Public Member Functions
	FileHashDatabase (ITraceMng *tm, const String &directory)
void	writeValues (const HashDatabaseWriteArgs &args, HashDatabaseWriteResult &xresult) override
void	readValues (const HashDatabaseReadArgs &args) override
Public Member Functions inherited from Arcane::TraceAccessor
	TraceAccessor (ITraceMng *m)
	Constructs an accessor via the trace manager m.
	TraceAccessor (const TraceAccessor &rhs)
	Copy constructor.
TraceAccessor &	operator= (const TraceAccessor &rhs)
	Copy assignment operator.
virtual	~TraceAccessor ()
	Frees resources.
ITraceMng *	traceMng () const
	Trace manager.
TraceMessage	info () const
	Flow for an information message.
TraceMessage	pinfo () const
	Flow for a parallel information message.
TraceMessage	info (char category) const
	Flow for an information message of a given category.
TraceMessage	pinfo (char category) const
	Flow for a parallel information message of a given category.
TraceMessage	info (bool v) const
	Flow for an information message.
TraceMessage	warning () const
	Flow for a warning message.
TraceMessage	pwarning () const
TraceMessage	error () const
	Flow for an error message.
TraceMessage	perror () const
TraceMessage	log () const
	Flow for a log message.
TraceMessage	plog () const
	Flow for a log message.
TraceMessage	logdate () const
	Flow for a log message preceded by the date.
TraceMessage	fatal () const
	Flow for a fatal error message.
TraceMessage	pfatal () const
	Flow for a parallel fatal error message.
TraceMessageDbg	debug (Trace::eDebugLevel=Trace::Medium) const
	Flow for a debug message.
Trace::eDebugLevel	configDbgLevel () const
	Debug level of the configuration file.
TraceMessage	info (Int32 verbose_level) const
	Flow for an information message of a given level.
TraceMessage	linfo () const
	Flow for an information message with the local information level of this instance.
TraceMessage	linfo (Int32 relative_level) const
	Flow for an information message with the local information level of this instance.
void	fatalMessage (const StandaloneTraceMessage &o) const

Private Member Functions
DirFileInfo	_getDirFileInfo (const String &hash_value)

Private Attributes
String	m_directory
Int64	m_nb_write_cache = 0
Int64	m_nb_write = 0
Int64	m_nb_read = 0

Additional Inherited Members
Protected Member Functions inherited from Arcane::TraceAccessor
void	_setLocalVerboseLevel (Int32 v)
Int32	_localVerboseLevel () const

Detailed Description

Hash database implemented as a file system.

The implementation is similar to what 'git' can do.

For each hash, we write a file whose name will be the hash and whose value will be the byte array corresponding to this hash. A file is therefore written only once and its value never changes: on write: if the file already exists, it is not necessary to write it again.

To avoid having too many hashes in the same directory, we create two subdirectories. The first with the first letter of the hash and the second with the next two letters. So for example, if the hash is '0a239fb4', then it will be in the directory '0/a2/0a239fb4'.

Definition at line 51 of file FileHashDatabase.cc.

Constructor & Destructor Documentation

FileHashDatabase()

Arcane::FileHashDatabase::FileHashDatabase ( ITraceMng * tm, const String & directory )

inline

Definition at line 67 of file FileHashDatabase.cc.

~FileHashDatabase()

Arcane::FileHashDatabase::~FileHashDatabase ( )

inline

Definition at line 72 of file FileHashDatabase.cc.

Member Function Documentation

_getDirFileInfo()

DirFileInfo Arcane::FileHashDatabase::_getDirFileInfo ( const String & hash_value )

inlineprivate

Definition at line 135 of file FileHashDatabase.cc.

readValues()

void Arcane::FileHashDatabase::readValues ( const HashDatabaseReadArgs & args )

inlineoverridevirtual

Implements Arcane::IHashDatabase.

Definition at line 115 of file FileHashDatabase.cc.

writeValues()

void Arcane::FileHashDatabase::writeValues ( const HashDatabaseWriteArgs & args, HashDatabaseWriteResult & xresult )

inlineoverridevirtual

Implements Arcane::IHashDatabase.

Definition at line 80 of file FileHashDatabase.cc.

Member Data Documentation

m_directory

String Arcane::FileHashDatabase::m_directory

private

Definition at line 153 of file FileHashDatabase.cc.

m_nb_read

Int64 Arcane::FileHashDatabase::m_nb_read = 0

private

Definition at line 156 of file FileHashDatabase.cc.

m_nb_write

Int64 Arcane::FileHashDatabase::m_nb_write = 0

private

Definition at line 155 of file FileHashDatabase.cc.

m_nb_write_cache

Int64 Arcane::FileHashDatabase::m_nb_write_cache = 0

private

Definition at line 154 of file FileHashDatabase.cc.

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The documentation for this class was generated from the following file:

• FileHashDatabase.cc