GlassChanges Class Reference

#include <glass_changes.h>

Collaboration diagram for GlassChanges:

Public Member Functions
	GlassChanges (const std::string &db_dir)
	~GlassChanges ()
GlassChanges *	start (glass_revision_number_t old_rev, glass_revision_number_t rev, int flags)
void	write_block (const char *p, size_t len)
void	write_block (const std::string &s)
void	set_oldest_changeset (glass_revision_number_t rev)
glass_revision_number_t	get_oldest_changeset () const
void	commit (glass_revision_number_t new_rev, int flags)

Static Public Member Functions
static void	check (const std::string &changes_file)

Private Attributes
int	changes_fd
	File descriptor to write changeset to (or -1 for none). More...
std::string	changes_stem
glass_revision_number_t	max_changesets
	The maximum number of changesets to keep. More...
glass_revision_number_t	oldest_changeset
	The oldest changeset which might exist on disk. More...

Detailed Description

Definition at line 28 of file glass_changes.h.

Constructor & Destructor Documentation

GlassChanges()

GlassChanges::GlassChanges ( const std::string &  db_dir )

inlineexplicit

Definition at line 50 of file glass_changes.h.

References start(), write_block(), and ~GlassChanges().

~GlassChanges()

GlassChanges::~GlassChanges

(

)

Definition at line 43 of file glass_changes.cc.

References close(), and io_unlink().

Referenced by GlassChanges().

Member Function Documentation

check()

void GlassChanges::check ( const std::string &  changes_file )

static

Definition at line 164 of file glass_changes.cc.

References CHANGES_MAGIC_STRING, CHANGES_VERSION, CONST_STRLEN, io_read(), O_CLOEXEC, posixy_open, unaligned_read4(), and unpack_uint().

Referenced by check_db_dir(), and get_oldest_changeset().

commit()

void GlassChanges::commit	(	glass_revision_number_t	new_rev,
		int	flags
	)

Definition at line 111 of file glass_changes.cc.

References close(), Xapian::DB_NO_SYNC, io_sync(), io_tmp_rename(), io_unlink(), io_write(), and Xapian::Internal::str().

Referenced by get_oldest_changeset(), and GlassDatabase::set_revision_number().

get_oldest_changeset()

glass_revision_number_t GlassChanges::get_oldest_changeset ( ) const

inline

Definition at line 71 of file glass_changes.h.

References check(), commit(), and oldest_changeset.

Referenced by GlassWritableDatabase::flush_postlist_changes().

set_oldest_changeset()

void GlassChanges::set_oldest_changeset ( glass_revision_number_t  rev )

inline

Definition at line 67 of file glass_changes.h.

Referenced by GlassDatabase::open_tables().

start()

GlassChanges * GlassChanges::start	(	glass_revision_number_t	old_rev,
		glass_revision_number_t	rev,
		int	flags
	)

Definition at line 54 of file glass_changes.cc.

References CHANGES_MAGIC_STRING, CHANGES_VERSION, Xapian::DB_DANGEROUS, io_write(), O_CLOEXEC, pack_uint(), and posixy_open.

Referenced by GlassDatabase::apply(), GlassChanges(), GlassDatabase::modifications_failed(), and GlassDatabase::open_tables().

write_block() [1/2]

void GlassChanges::write_block	(	const char *	p,
		size_t	len
	)

Definition at line 105 of file glass_changes.cc.

References io_write().

Referenced by GlassChanges(), GlassVersion::write(), and write_block().

write_block() [2/2]

void GlassChanges::write_block ( const std::string &  s )

inline

Definition at line 63 of file glass_changes.h.

References write_block().

Member Data Documentation

changes_fd

int GlassChanges::changes_fd

private

File descriptor to write changeset to (or -1 for none).

Definition at line 30 of file glass_changes.h.

changes_stem

std::string GlassChanges::changes_stem

private

Definition at line 32 of file glass_changes.h.

max_changesets

glass_revision_number_t GlassChanges::max_changesets

private

The maximum number of changesets to keep.

If a slave is more than this number of changesets behind, it will need to be sent a full copy of the database (which can be more efficient if a lot has changed).

Definition at line 40 of file glass_changes.h.

oldest_changeset

glass_revision_number_t GlassChanges::oldest_changeset

private

The oldest changeset which might exist on disk.

Used to optimise removal of old changesets by giving us a point to start looking for ones to delete.

Definition at line 47 of file glass_changes.h.

Referenced by get_oldest_changeset().

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

• backends/glass/glass_changes.h
• backends/glass/glass_changes.cc