Handle access to a medium. More...

#include <MediaAccess.h>

Inheritance diagram for zypp::media::MediaAccess:

Classes
class	FileProvider
	Helper class that provides file on construction and cleans up on destruction. More...
Public Types
typedef intrusive_ptr < MediaAccess >	Ptr
typedef intrusive_ptr< const MediaAccess >	constPtr
Public Member Functions
	MediaAccess ()
	constructor
void	open (const Url &url, const Pathname &preferred_attach_point="")
	open url.
bool	isOpen () const
	True if media is open.
bool	downloads () const
	Hint if files are downloaded or not.
std::string	protocol () const
	Used Protocol if media is opened, otherwise 'unknown'.
Url	url () const
	Url if media is opened, otherwise empty.
void	close ()
	close url
void	attach (bool next=false)
	Use concrete handler to attach the media.
bool	isAttached () const
	True if media is attached.
bool	hasMoreDevices () const
virtual void	getDetectedDevices (std::vector< std::string > &devices, unsigned int &index) const
	Fill in a vector of detected ejectable devices and the index of the currently attached device within the vector.
Pathname	localRoot () const
	Return the local directory that corresponds to medias url, no matter if media isAttached or not.
Pathname	localPath (const Pathname &pathname) const
	Short for 'localRoot() + pathname', but returns an empty pathname if media is not open.
void	disconnect ()
	Use concrete handler to disconnect the media.
void	release (const std::string &ejectDev="")
	Use concrete handler to release the media.
void	provideFile (const Pathname &filename) const
	Use concrete handler to provide file denoted by path below 'attach point'.
void	releaseFile (const Pathname &filename) const
	Remove filename below attach point IFF handler downloads files to the local filesystem.
void	provideDir (const Pathname &dirname) const
	Use concrete handler to provide directory denoted by path below 'attach point' (not recursive!).
void	provideDirTree (const Pathname &dirname) const
	Use concrete handler to provide directory tree denoted by path below 'attach point' (recursive!!).
void	releaseDir (const Pathname &dirname) const
	Remove directory tree below attach point IFF handler downloads files to the local filesystem.
void	releasePath (const Pathname &pathname) const
	Remove pathname below attach point IFF handler downloads files to the local filesystem.
void	setDeltafile (const Pathname &filename) const
	set a deltafile to be used in the next download
void	dirInfo (std::list< std::string > &retlist, const Pathname &dirname, bool dots=true) const
	Return content of directory on media via retlist.
void	dirInfo (filesystem::DirContent &retlist, const Pathname &dirname, bool dots=true) const
	Basically the same as dirInfo above.
bool	doesFileExist (const Pathname &filename) const
	check if a file exists
virtual	~MediaAccess ()
	Destructor.
virtual std::ostream &	dumpOn (std::ostream &str) const
	Overload to realize std::ostream & operator<<.
void	getFile (const Url &from, const Pathname &to)
	Get file from location at specified by URL and copy it to destination.
Static Public Member Functions
static ZYPP_DEPRECATED bool	downloads (const Url &url)
static ZYPP_DEPRECATED bool	canBeVolatile (const Url &url)
Private Member Functions
AttachedMedia	attachedMedia () const
bool	isSharedMedia () const
void	resetParentId ()
bool	dependsOnParent () const
bool	dependsOnParent (MediaAccessId parentId, bool exactIdMatch) const
Private Attributes
MediaHandler *	_handler
	handler for 'physical' media == 0 if not open
Static Private Attributes
static const Pathname	_noPath
Friends
class	MediaManager
class	MediaManager_Impl

Detailed Description

Handle access to a medium.

The concrete MediaHandler for a certain url is created on open and deleted on .

The inteface here basically checks whether the handler exists, then forwards the request to MediaHandler.

Definition at line 50 of file MediaAccess.h.

Member Typedef Documentation

typedef intrusive_ptr<MediaAccess> zypp::media::MediaAccess::Ptr

Definition at line 53 of file MediaAccess.h.

typedef intrusive_ptr<const MediaAccess> zypp::media::MediaAccess::constPtr

Definition at line 54 of file MediaAccess.h.

Constructor & Destructor Documentation

zypp::media::MediaAccess::MediaAccess ( )

constructor

Definition at line 54 of file MediaAccess.cc.

zypp::media::MediaAccess::~MediaAccess ( ) [virtual]

Destructor.

Definition at line 60 of file MediaAccess.cc.

Member Function Documentation

AttachedMedia zypp::media::MediaAccess::attachedMedia ( ) const [private]

Definition at line 70 of file MediaAccess.cc.

bool zypp::media::MediaAccess::isSharedMedia ( ) const [private]

Definition at line 77 of file MediaAccess.cc.

void zypp::media::MediaAccess::resetParentId ( ) [private]

Definition at line 84 of file MediaAccess.cc.

bool zypp::media::MediaAccess::dependsOnParent ( ) const [private]

Definition at line 90 of file MediaAccess.cc.

bool zypp::media::MediaAccess::dependsOnParent	(	MediaAccessId	parentId,
		bool	exactIdMatch
	)		const `[private]`

Definition at line 96 of file MediaAccess.cc.

void zypp::media::MediaAccess::open	(	const Url &	url,
		const Pathname &	preferred_attach_point = `""`
	)

open url.

If preferred_attach_point is given, try to use it as attach point.

Caution: The medium can choose a different attach point. Only getAttachPoint() knows the real attach point.

Exceptions:

MediaException

Definition at line 105 of file MediaAccess.cc.

bool zypp::media::MediaAccess::isOpen ( ) const [inline]

True if media is open.

Definition at line 100 of file MediaAccess.h.

bool zypp::media::MediaAccess::downloads ( ) const

Hint if files are downloaded or not.

Returns:: True, if the files are downloaded.

Definition at line 248 of file MediaAccess.cc.

static ZYPP_DEPRECATED bool zypp::media::MediaAccess::downloads ( const Url & url ) [inline, static]

Deprecated:: Use Url::schemeIsDownloading

Definition at line 110 of file MediaAccess.h.

static ZYPP_DEPRECATED bool zypp::media::MediaAccess::canBeVolatile ( const Url & url ) [inline, static]

Deprecated:: Use Url::schemeIsVolatile

Definition at line 115 of file MediaAccess.h.

std::string zypp::media::MediaAccess::protocol ( ) const

Used Protocol if media is opened, otherwise 'unknown'.

Definition at line 239 of file MediaAccess.cc.

Url zypp::media::MediaAccess::url ( ) const

Url if media is opened, otherwise empty.

Definition at line 259 of file MediaAccess.cc.

void zypp::media::MediaAccess::close ( )

close url

Exceptions:

MediaException

Definition at line 269 of file MediaAccess.cc.

void zypp::media::MediaAccess::attach ( bool next = false )

Use concrete handler to attach the media.

Parameters:

next	try next available device in turn until end of device list is reached (for media which are accessible through multiple devices like cdroms).

Exceptions:

MediaException

Definition at line 293 of file MediaAccess.cc.

bool zypp::media::MediaAccess::isAttached ( ) const

True if media is attached.

Exceptions:

MediaException

Definition at line 303 of file MediaAccess.cc.

bool zypp::media::MediaAccess::hasMoreDevices ( ) const

Definition at line 309 of file MediaAccess.cc.

void zypp::media::MediaAccess::getDetectedDevices	(	std::vector< std::string > &	devices,
		unsigned int &	index
	)		const `[virtual]`

Fill in a vector of detected ejectable devices and the index of the currently attached device within the vector.

The contents of the vector are the device names (/dev/cdrom and such).

Parameters:

devices	vector to load with the device names
index	index of the currently used device in the devices vector

Definition at line 316 of file MediaAccess.cc.

Pathname zypp::media::MediaAccess::localRoot ( ) const

Return the local directory that corresponds to medias url, no matter if media isAttached or not.

Files requested will be available at 'localRoot() + filename' or better 'localPath( filename )'.

If media is not open an empty pathname is returned.

Definition at line 334 of file MediaAccess.cc.

Pathname zypp::media::MediaAccess::localPath ( const Pathname & pathname ) const

Short for 'localRoot() + pathname', but returns an empty pathname if media is not open.

Files provided will be available at 'localPath(filename)'.

Definition at line 345 of file MediaAccess.cc.

void zypp::media::MediaAccess::disconnect ( )

Use concrete handler to disconnect the media.

This is useful for media which e.g. holds open a connection to a server like FTP. After calling disconnect() the media object still is valid and files are present.

After calling disconnect() it's not possible to call provideFile() or provideDir() anymore.

Exceptions:

MediaException

Definition at line 354 of file MediaAccess.cc.

void zypp::media::MediaAccess::release ( const std::string & ejectDev = "" )

Use concrete handler to release the media.

Parameters:

ejectDev Device to eject. None if empty.

Exceptions:

MediaException

Definition at line 364 of file MediaAccess.cc.

void zypp::media::MediaAccess::provideFile ( const Pathname & filename ) const

Use concrete handler to provide file denoted by path below 'attach point'.

Filename is interpreted relative to the attached url and a path prefix is preserved.

Parameters:

cached	If cached is set to true, the function checks, if the file already exists and doesn't download it again if it does. Currently only the existence is checked, no other file attributes.
checkonly	If this and 'cached' are set to true only the existence of the file is checked but it's not downloaded. If 'cached' is unset an errer is returned always.

Exceptions:

MediaException

Definition at line 377 of file MediaAccess.cc.

void zypp::media::MediaAccess::releaseFile ( const Pathname & filename ) const

Remove filename below attach point IFF handler downloads files to the local filesystem.

Never remove anything from media.

Exceptions:

MediaException

Definition at line 397 of file MediaAccess.cc.

void zypp::media::MediaAccess::provideDir ( const Pathname & dirname ) const

Use concrete handler to provide directory denoted by path below 'attach point' (not recursive!).

'dirname' is interpreted relative to the attached url and a path prefix is preserved.

Exceptions:

MediaException

Definition at line 410 of file MediaAccess.cc.

void zypp::media::MediaAccess::provideDirTree ( const Pathname & dirname ) const

Use concrete handler to provide directory tree denoted by path below 'attach point' (recursive!!).

'dirname' is interpreted relative to the attached url and a path prefix is preserved.

Exceptions:

MediaException

Definition at line 420 of file MediaAccess.cc.

void zypp::media::MediaAccess::releaseDir ( const Pathname & dirname ) const

Remove directory tree below attach point IFF handler downloads files to the local filesystem.

Never remove anything from media.

Exceptions:

MediaException

Definition at line 430 of file MediaAccess.cc.

void zypp::media::MediaAccess::releasePath ( const Pathname & pathname ) const

Remove pathname below attach point IFF handler downloads files to the local filesystem.

Never remove anything from media.

If pathname denotes a directory it is recursively removed. If pathname is empty or '/' everything below the attachpoint is recursively removed.

Exceptions:

MediaException

Definition at line 439 of file MediaAccess.cc.

void zypp::media::MediaAccess::setDeltafile ( const Pathname & filename ) const

set a deltafile to be used in the next download

Definition at line 387 of file MediaAccess.cc.

void zypp::media::MediaAccess::dirInfo	(	std::list< std::string > &	retlist,
		const Pathname &	dirname,
		bool	dots = `true`
	)		const

Return content of directory on media via retlist.

If dots is false entries starting with '.' are not reported.

The request is forwarded to the concrete handler, which may atempt to retieve the content e.g. via 'readdir'

Caution: This is not supported by all media types. Be prepared to handle E_not_supported_by_media.

Exceptions:

MediaException

Definition at line 449 of file MediaAccess.cc.

void zypp::media::MediaAccess::dirInfo	(	filesystem::DirContent &	retlist,
		const Pathname &	dirname,
		bool	dots = `true`
	)		const

Basically the same as dirInfo above.

The content is returned as filesystem::DirContent, which includes name and filetype of each directory entry. Retrieving the filetype usg. requires an additional ::stat call for each entry, thus it's more expensive than a simple readdir.

Caution: This is not supported by all media types. Be prepared to handle E_not_supported_by_media.

Exceptions:

MediaException

Definition at line 462 of file MediaAccess.cc.

bool zypp::media::MediaAccess::doesFileExist ( const Pathname & filename ) const

check if a file exists

Asserted that url is a file and not a dir.

Exceptions:

MediaException

Definition at line 475 of file MediaAccess.cc.

std::ostream & zypp::media::MediaAccess::dumpOn ( std::ostream & str ) const [virtual]

Overload to realize std::ostream & operator<<.

Reimplemented from zypp::base::ReferenceCounted.

Definition at line 485 of file MediaAccess.cc.

void zypp::media::MediaAccess::getFile	(	const Url &	from,
		const Pathname &	to
	)

Get file from location at specified by URL and copy it to destination.

Parameters:

from	Source URL
to	Destination file name

Exceptions:

MediaException

Definition at line 494 of file MediaAccess.cc.

Friends And Related Function Documentation

friend class MediaManager [friend]

Definition at line 66 of file MediaAccess.h.

friend class MediaManager_Impl [friend]

Definition at line 67 of file MediaAccess.h.

Member Data Documentation

const Pathname zypp::media::MediaAccess::_noPath [static, private]

Definition at line 58 of file MediaAccess.h.

MediaHandler* zypp::media::MediaAccess::_handler [private]

handler for 'physical' media == 0 if not open

Definition at line 64 of file MediaAccess.h.

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

zypp/media/MediaAccess.h
zypp/media/MediaAccess.cc

Classes

Public Types

Public Member Functions

Static Public Member Functions

Private Member Functions

Private Attributes

Static Private Attributes

Friends

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation