Media access layer responsible for handling files distributed on a set of media with media change and abort/retry/ingore user callback handling. More...

#include <MediaSetAccess.h>

Inheritance diagram for zypp::MediaSetAccess:

[legend]

List of all members.

Public Types
enum	ProvideFileOption { PROVIDE_DEFAULT = 0x0, PROVIDE_NON_INTERACTIVE = 0x1 }
Public Member Functions
	MediaSetAccess (const Url &url, const Pathname &prefered_attach_point="")
	Creates a callback enabled media access for specified url.
	MediaSetAccess (const std::string &label_r, const Url &url, const Pathname &prefered_attach_point="")
	~MediaSetAccess ()
void	setVerifier (unsigned media_nr, media::MediaVerifierRef verifier)
	Sets a MediaVerifier verifier for given media number.
const std::string &	label () const
	The label identifing this media set and to be sent in a media change request.
void	setLabel (const std::string &label_r)
	Set the label identifing this media set and to be sent in a media change request.
	ZYPP_DECLARE_FLAGS (ProvideFileOptions, ProvideFileOption)
Pathname	provideFile (const OnMediaLocation &resource, ProvideFileOptions options=PROVIDE_DEFAULT, const Pathname &deltafile=Pathname())
	Provides a file from a media location.
Pathname	provideFile (const Pathname &file, unsigned media_nr=1, ProvideFileOptions options=PROVIDE_DEFAULT)
	Provides file from media media_nr.
void	releaseFile (const OnMediaLocation &resource)
	Release file from media.
void	releaseFile (const Pathname &file, unsigned media_nr=1)
	Release file from media.
Pathname	provideDir (const Pathname &dir, bool recursive, unsigned media_nr=1, ProvideFileOptions options=PROVIDE_DEFAULT)
	Provides direcotry dir from media number media_nr.
bool	doesFileExist (const Pathname &file, unsigned media_nr=1)
	Checks if a file exists on the specified media, with user callbacks.
void	dirInfo (filesystem::DirContent &retlist, const Pathname &dirname, bool dots=true, unsigned media_nr=1)
	Fills retlist with directory information.
void	release ()
	Release all attached media of this set.
Static Public Member Functions
static Url	rewriteUrl (const Url &url_r, const media::MediaNr medianr)
	Replaces media number in specified url with given medianr.
Protected Types
typedef function< void(media::MediaAccessId, const Pathname &)>	ProvideOperation
Protected Member Functions
Pathname	provideFileInternal (const OnMediaLocation &resource, ProvideFileOptions options)
	Provides the file from medium number media_nr and returns its local path.
void	provide (ProvideOperation op, const OnMediaLocation &resource, ProvideFileOptions options, const Pathname &deltafile)
media::MediaAccessId	getMediaAccessId (media::MediaNr medianr)
virtual std::ostream &	dumpOn (std::ostream &str) const
	Overload to realize std::ostream & operator<<.
Private Types
typedef std::map < media::MediaNr, media::MediaAccessId >	MediaMap
typedef std::map < media::MediaNr, media::MediaVerifierRef >	VerifierMap
Private Attributes
Url	_url
	Media or media set URL.
Pathname	_prefAttachPoint
	Prefered mount point.
std::string	_label
MediaMap	_medias
	Mapping between media number and Media Access ID.
VerifierMap	_verifiers
	Mapping between media number and corespondent verifier.
Friends
std::ostream &	operator<< (std::ostream &str, const MediaSetAccess &obj)
Related Functions
(Note that these are not member functions.)
std::ostream &	operator<< (std::ostream &str, const MediaSetAccess &obj)

Detailed Description

Media access layer responsible for handling files distributed on a set of media with media change and abort/retry/ingore user callback handling.

This is provided as a means to handle CD or DVD sets accessible through dir, iso, nfs or other URL schemes other than cd/dvd (see MediaManager for info on different implemented media backends). Currently it handles URLs containing cdN, CDN, dvdN, and DVDN strings, where N is the number of particular media in the set.

Examples:

 "iso:/?iso=/path/to/iso/images/openSUSE-10.3-Alpha2plus-DVD-x86_64-DVD1.iso"
 "dir:/path/to/cdset/sources/openSUSE-10.3/Alpha2plus/CD1"

MediaSetAccess accesses files on desired media by rewriting the original URL, replacing the digit (usually) 1 with requested media number and uses MediaManager to get the files from the new URL.

Additionaly, each media number can be assined a media verifier which checks if the media we are trying to access is the desired one. See MediaVerifierBase for more info.

Code example:

 Url url("dir:/path/to/cdset/sources/openSUSE-10.3/Alpha2plus/CD1");

 MediaSetAccess access(url);

 access.setVerifier(1, media1VerifierRef);
 access.setVerifier(2, media2VerifierRef);

 Pathname file1 = "/some/file/on/media1";
 Pathname providedfile1 = access.provideFile(file1, 1);
 Pathname file2 = "/some/file/on/media2";
 Pathname providedfile2 = access.provideFile(file1, 2);

Definition at line 77 of file MediaSetAccess.h.

Member Typedef Documentation

typedef function<void( media::MediaAccessId, const Pathname & )> zypp::MediaSetAccess::ProvideOperation [protected]

Definition at line 272 of file MediaSetAccess.h.

typedef std::map<media::MediaNr, media::MediaAccessId> zypp::MediaSetAccess::MediaMap [private]

Definition at line 293 of file MediaSetAccess.h.

typedef std::map<media::MediaNr, media::MediaVerifierRef > zypp::MediaSetAccess::VerifierMap [private]

Definition at line 294 of file MediaSetAccess.h.

Member Enumeration Documentation

enum zypp::MediaSetAccess::ProvideFileOption

Enumerator:

PROVIDE_DEFAULT	The user is not asked anything, and the error exception is just propagated.
PROVIDE_NON_INTERACTIVE

Definition at line 111 of file MediaSetAccess.h.

Constructor & Destructor Documentation

zypp::MediaSetAccess::MediaSetAccess	(	const Url &	url,
		const Pathname &	prefered_attach_point = `""`
	)

Creates a callback enabled media access for specified url.

Parameters:

url
prefered_attach_point	Prefered attach (mount) point. Use, if you want to mount the media to a specific directory.

Definition at line 31 of file MediaSetAccess.cc.

zypp::MediaSetAccess::MediaSetAccess	(	const std::string &	label_r,
		const Url &	url,
		const Pathname &	prefered_attach_point = `""`
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Definition at line 37 of file MediaSetAccess.cc.

zypp::MediaSetAccess::~MediaSetAccess ( )

Definition at line 45 of file MediaSetAccess.cc.

Member Function Documentation

void zypp::MediaSetAccess::setVerifier	(	unsigned	media_nr,
		media::MediaVerifierRef	verifier
	)

Sets a MediaVerifier verifier for given media number.

Definition at line 55 of file MediaSetAccess.cc.

const std::string& zypp::MediaSetAccess::label ( ) const [inline]

The label identifing this media set and to be sent in a media change request.

Definition at line 102 of file MediaSetAccess.h.

void zypp::MediaSetAccess::setLabel ( const std::string & label_r ) [inline]

Set the label identifing this media set and to be sent in a media change request.

Definition at line 108 of file MediaSetAccess.h.

zypp::MediaSetAccess::ZYPP_DECLARE_FLAGS	(	ProvideFileOptions	,
		ProvideFileOption
	)

Pathname zypp::MediaSetAccess::provideFile	(	const OnMediaLocation &	resource,
		ProvideFileOptions	options = `PROVIDE_DEFAULT`,
		const Pathname &	deltafile = `Pathname()`
	)

Provides a file from a media location.

Parameters:

resource location of the file on media

Returns:: local pathname of the requested file

Exceptions:

MediaException	if a problem occured and user has chosen to abort the operation. The calling code should take care to quit the current operation.
SkipRequestException	if a problem occured and user has chosen to skip the current operation. The calling code should continue with the next one, if possible.

If the resource is marked as optional, no Exception is thrown and Pathname() is returned

the optional deltafile argument describes a file that can be used for delta download algorithms.

Note:: interaction with the user does not ocurr if ProvideFileOptions::NON_INTERACTIVE is set.; OnMediaLocation::optional() hint has no effect on the transfer.

See also:: zypp::media::MediaManager::provideFile()

Definition at line 157 of file MediaSetAccess.cc.

Pathname zypp::MediaSetAccess::provideFile	(	const Pathname &	file,
		unsigned	media_nr = `1`,
		ProvideFileOptions	options = `PROVIDE_DEFAULT`
	)

Provides file from media media_nr.

Parameters:

file	path to the file relative to media URL
media_nr	the media number in the media set

Returns:: local pathname of the requested file

Note:: interaction with the user does not ocurr if ProvideFileOptions::NON_INTERACTIVE is set.; OnMediaLocation::optional() hint has no effect on the transfer.

Exceptions:

MediaException	if a problem occured and user has chosen to abort the operation. The calling code should take care to quit the current operation.
SkipRequestException	if a problem occured and user has chosen to skip the current operation. The calling code should continue with the next one, if possible.

See also:: zypp::media::MediaManager::provideFile()

Definition at line 164 of file MediaSetAccess.cc.

void zypp::MediaSetAccess::releaseFile ( const OnMediaLocation & resource )

Release file from media.

This signal that file is not needed anymore.

Parameters:

resource location of the file on media

Definition at line 74 of file MediaSetAccess.cc.

void zypp::MediaSetAccess::releaseFile	(	const Pathname &	file,
		unsigned	media_nr = `1`
	)

Release file from media.

This signal that file is not needed anymore.

Parameters:

file	path to the file relative to media URL
media_nr	the media number in the media set

Definition at line 79 of file MediaSetAccess.cc.

Pathname zypp::MediaSetAccess::provideDir	(	const Pathname &	dir,
		bool	recursive,
		unsigned	media_nr = `1`,
		ProvideFileOptions	options = `PROVIDE_DEFAULT`
	)

Provides direcotry dir from media number media_nr.

Parameters:

dir	path to the directory relative to media URL
recursive	whether to provide the whole directory subtree
media_nr	the media number in the media set

Returns:: local pathname of the requested directory

Exceptions:

MediaException if a problem occured and user has chosen to abort the operation. The calling code should take care to quit the current operation.

Todo:: throw SkipRequestException if a problem occured and user has chosen to skip the current operation. The calling code should continue with the next one, if possible.

See also:: zypp::media::MediaManager::provideDir(); zypp::media::MediaManager::provideDirTree()

Definition at line 329 of file MediaSetAccess.cc.

bool zypp::MediaSetAccess::doesFileExist	(	const Pathname &	file,
		unsigned	media_nr = `1`
	)

Checks if a file exists on the specified media, with user callbacks.

Parameters:

file	file to check
media_nr	Media number

Exceptions:

MediaException	if a problem occured and user has chosen to abort the operation. The calling code should take care to quit the current operation.
SkipRequestException	if a problem occured and user has chosen to skip the current operation. The calling code should continue with the next one, if possible.

See also:: zypp::media::MediaManager::doesFileExist(MediaAccessId,const Pathname&)

Definition at line 173 of file MediaSetAccess.cc.

void zypp::MediaSetAccess::dirInfo	(	filesystem::DirContent &	retlist,
		const Pathname &	dirname,
		bool	dots = `true`,
		unsigned	media_nr = `1`
	)

Fills retlist with directory information.

Definition at line 94 of file MediaSetAccess.cc.

void zypp::MediaSetAccess::release ( )

Release all attached media of this set.

Exceptions:

MediaNotOpenException for invalid access IDs.

Definition at line 429 of file MediaSetAccess.cc.

Url zypp::MediaSetAccess::rewriteUrl	(	const Url &	url_r,
		const media::MediaNr	medianr
	)		`[static]`

Replaces media number in specified url with given medianr.

Media number in the URL is searched for with regex "^(.*(cd|dvd))([0-9]+)(\\.iso)$" for iso scheme and with "^(.*(cd|dvd))([0-9]+)(/?)$" for other schemes.

For cd and dvd scheme it returns the original URL, as well as for URL which do not match the above regexes.

Parameters:

url_r	original URL
medianr	requested media number

Returns:: rewritten URL if applicable, the original URL otherwise

Definition at line 386 of file MediaSetAccess.cc.

Pathname zypp::MediaSetAccess::provideFileInternal	(	const OnMediaLocation &	resource,
		ProvideFileOptions	options
	)		`[protected]`

Provides the file from medium number media_nr and returns its local path.

Note:: The method must not throw if checkonly is true.

Exceptions:

MediaException	checkonly is `false` and a problem occured and user has chosen to abort the operation. The calling code should take care to quit the current operation.
SkipRequestException	checkonly is `false` and a problem occured and user has chosen to skip the current operation. The calling code should continue with the next one, if possible.

void zypp::MediaSetAccess::provide	(	ProvideOperation	op,
		const OnMediaLocation &	resource,
		ProvideFileOptions	options,
		const Pathname &	deltafile
	)		`[protected]`