FileBackend helper class for representing operations. More...

Inheritance diagram for FileOp:

Collaboration diagram for FileOp:

Public Member Functions
	__construct (FileBackendStore $backend, array $params)
	Build a new batch file operation transaction.
	applyDependencies (array $deps)
	Update a dependency tracking array to account for this operation.
	attempt ()
	Attempt the operation.
	attemptAsync ()
	Attempt the operation in the background.
	dependsOn (array $deps)
	Check if this operation changes files listed in $paths.
	failed ()
	Check if this operation failed precheck() or attempt()
	getBackend ()
	Get the backend this operation is for.
	getJournalEntries (array $oPredicates, array $nPredicates)
	Get the file journal entries for this file operation.
	getParam ($name)
	Get the value of the parameter with the given name.
	logFailure ($action)
	Log a file operation failure and preserve any temp files.
	precheck (array &$predicates)
	Check preconditions of the operation without writing anything.
	setBatchId ($batchId)
	Set the batch UUID this operation belongs to.
	storagePathsChanged ()
	Get a list of storage paths written to for this operation.
	storagePathsRead ()
	Get a list of storage paths read from for this operation.
Static Public Member Functions
static	newDependencies ()
	Get a new empty dependency tracking array for paths read/written to.
static	newPredicates ()
	Get a new empty predicates array for precheck()
Public Attributes
const	STATE_ATTEMPTED = 3
const	STATE_CHECKED = 2
const	STATE_NEW = 1
Protected Member Functions
	allowedParams ()
	Get the file operation parameters.
	doAttempt ()
	doPrecheck (array &$predicates)
	fileExists ($source, array $predicates)
	Check if a file will exist in storage when this operation is attempted.
	fileSha1 ($source, array $predicates)
	Get the SHA-1 of a file in storage when this operation is attempted.
	getSourceSha1Base36 ()
	precheckDestExistence() helper function to get the source file SHA-1.
	precheckDestExistence (array $predicates)
	Check for errors with regards to the destination file already existing.
	setFlags (array $params)
	Adjust params to FileBackendStore internal file calls.
Static Protected Member Functions
static	normalizeIfValidStoragePath ($path)
	Normalize a string if it is a valid storage path.
Protected Attributes
bool	$async = false
	*
FileBackendStore	$backend
	*
string	$batchId
	*
bool	$destExists
	*
bool	$doOperation = true
	Operation is not a no-op *.
bool	$failed = false
	*
bool	$overwriteSameCase
	*
array	$params = array()
	*
string	$sourceSha1
	*
int	$state = self::STATE_NEW
	*

Detailed Description

FileBackend helper class for representing operations.

Do not use this class from places outside FileBackend.

Methods called from FileOpBatch::attempt() should avoid throwing exceptions at all costs. FileOp objects should be lightweight in order to support large arrays in memory and serialization.

Since:: 1.19

Definition at line 36 of file FileOp.php.

Constructor & Destructor Documentation

FileOp::__construct	(	FileBackendStore $	backend,
		array $	params
	)		`[final]`

Build a new batch file operation transaction.

Parameters:

FileBackendStore	$backend
array	$params

Exceptions:

FileBackendError

Definition at line 69 of file FileOp.php.

References $backend, $name, allowedParams(), as, list, and normalizeIfValidStoragePath().

Member Function Documentation

FileOp::allowedParams ( ) [protected]

Get the file operation parameters.

Returns:: array (required params list, optional params list, list of params that are paths)

Reimplemented in DescribeFileOp, DeleteFileOp, MoveFileOp, CopyFileOp, StoreFileOp, and CreateFileOp.

Definition at line 308 of file FileOp.php.

Referenced by __construct().

FileOp::applyDependencies ( array $ deps ) [final]

Update a dependency tracking array to account for this operation.

Parameters:

array $deps Prior path reads/writes; format of FileOp::newPredicates()

Returns:: array

Definition at line 160 of file FileOp.php.

References array().

FileOp::attempt ( ) [final]

Attempt the operation.

Returns:: Status

Definition at line 263 of file FileOp.php.

FileOp::attemptAsync ( ) [final]

Attempt the operation in the background.

Returns:: Status

Definition at line 295 of file FileOp.php.

FileOp::dependsOn ( array $ deps ) [final]

Check if this operation changes files listed in $paths.

Parameters:

array $deps Prior path reads/writes; format of FileOp::newPredicates()

Returns:: bool

Definition at line 173 of file FileOp.php.

FileOp::doAttempt ( ) [protected]

Returns:: Status

Reimplemented in DescribeFileOp, DeleteFileOp, MoveFileOp, CopyFileOp, StoreFileOp, and CreateFileOp.

Definition at line 286 of file FileOp.php.

FileOp::doPrecheck ( array &$ predicates ) [protected]

Parameters:

array $predicates

Returns:: Status

Reimplemented in DescribeFileOp, DeleteFileOp, MoveFileOp, CopyFileOp, StoreFileOp, and CreateFileOp.

Definition at line 254 of file FileOp.php.

FileOp::failed ( ) [final]

Check if this operation failed precheck() or attempt()

Returns:: bool

Definition at line 132 of file FileOp.php.

FileOp::fileExists	(	$	source,
		array $	predicates
	)		`[final, protected]`

Check if a file will exist in storage when this operation is attempted.

Parameters:

string	$source	Storage path
array	$predicates

Returns:: bool

Definition at line 400 of file FileOp.php.

Referenced by DeleteFileOp\doPrecheck(), and DescribeFileOp\doPrecheck().

FileOp::fileSha1	(	$	source,
		array $	predicates
	)		`[final, protected]`

Get the SHA-1 of a file in storage when this operation is attempted.

Parameters:

string	$source	Storage path
array	$predicates

Returns:: string|bool False on failure

Definition at line 417 of file FileOp.php.

FileOp::getBackend ( )

Get the backend this operation is for.

Returns:: FileBackendStore

Definition at line 434 of file FileOp.php.

FileOp::getJournalEntries	(	array $	oPredicates,
		array $	nPredicates
	)		`[final]`

Get the file journal entries for this file operation.

Parameters:

array	$oPredicates	Pre-op info about files (format of FileOp::newPredicates)
array	$nPredicates	Post-op info about files (format of FileOp::newPredicates)

Returns:: array

Definition at line 195 of file FileOp.php.

FileOp::getParam ( $ name ) [final]

Get the value of the parameter with the given name.

Parameters:

string $name

Returns:: mixed Returns null if the parameter is not set

Definition at line 123 of file FileOp.php.

References $batchId.

Referenced by DeleteFileOp\doPrecheck().

FileOp::getSourceSha1Base36 ( ) [protected]

precheckDestExistence() helper function to get the source file SHA-1.

Subclasses should overwride this if the source is not in storage.

Returns:: string|bool Returns false on failure

Reimplemented in StoreFileOp, and CreateFileOp.

Definition at line 389 of file FileOp.php.

FileOp::logFailure ( $ action ) [final]

Log a file operation failure and preserve any temp files.

Parameters:

string $action

Definition at line 443 of file FileOp.php.

static FileOp::newDependencies ( ) [static, final]

Get a new empty dependency tracking array for paths read/written to.

Returns:: array

Definition at line 150 of file FileOp.php.

Referenced by FileOpBatch\attempt().

static FileOp::newPredicates ( ) [static, final]

Get a new empty predicates array for precheck()

Returns:: array

Definition at line 141 of file FileOp.php.

Referenced by FileOpBatch\attempt().

static FileOp::normalizeIfValidStoragePath ( $ path ) [static, protected]

Normalize a string if it is a valid storage path.

Parameters:

string $path

Returns:: string

Definition at line 98 of file FileOp.php.

Referenced by __construct().

FileOp::precheck ( array &$ predicates ) [final]

Check preconditions of the operation without writing anything.

This must update $predicates for each path that the op can change except when a failing status object is returned.

Parameters:

array $predicates

Returns:: Status

Definition at line 237 of file FileOp.php.

FileOp::precheckDestExistence ( array $ predicates ) [protected]

Check for errors with regards to the destination file already existing.

Also set the destExists, overwriteSameCase and sourceSha1 member variables. A bad status will be returned if there is no chance it can be overwritten.

Parameters:

array $predicates

Returns:: Status

Definition at line 348 of file FileOp.php.

FileOp::setBatchId ( $ batchId ) [final]

Set the batch UUID this operation belongs to.

Parameters:

string $batchId

Definition at line 113 of file FileOp.php.

FileOp::setFlags ( array $ params ) [protected]

Adjust params to FileBackendStore internal file calls.

Parameters:

array $params

Returns:: array (required params list, optional params list)

Definition at line 318 of file FileOp.php.

References array().

Referenced by StoreFileOp\getSourceSha1Base36().

FileOp::storagePathsChanged ( )

Get a list of storage paths written to for this operation.

Returns:: array

Reimplemented in DescribeFileOp, DeleteFileOp, MoveFileOp, CopyFileOp, StoreFileOp, and CreateFileOp.

Definition at line 336 of file FileOp.php.

FileOp::storagePathsRead ( )

Get a list of storage paths read from for this operation.

Returns:: array

Reimplemented in MoveFileOp, and CopyFileOp.

Definition at line 327 of file FileOp.php.

Member Data Documentation

bool FileOp::$async = false [protected]

*

Definition at line 45 of file FileOp.php.

FileBackendStore FileOp::$backend [protected]

*

Definition at line 39 of file FileOp.php.

Referenced by __construct().

string FileOp::$batchId [protected]

*

Definition at line 47 of file FileOp.php.

Referenced by getParam().

bool FileOp::$destExists [protected]

*

Definition at line 55 of file FileOp.php.

bool FileOp::$doOperation = true [protected]

Operation is not a no-op *.

Definition at line 49 of file FileOp.php.

bool FileOp::$failed = false [protected]

*

Definition at line 43 of file FileOp.php.

bool FileOp::$overwriteSameCase [protected]

*

Definition at line 53 of file FileOp.php.

array FileOp::$params = array() [protected]

*

Definition at line 37 of file FileOp.php.

string FileOp::$sourceSha1 [protected]

*

Definition at line 51 of file FileOp.php.

int FileOp::$state = self::STATE_NEW [protected]

*

Definition at line 41 of file FileOp.php.

const FileOp::STATE_ATTEMPTED = 3

Definition at line 60 of file FileOp.php.

const FileOp::STATE_CHECKED = 2

Definition at line 59 of file FileOp.php.

const FileOp::STATE_NEW = 1

Definition at line 58 of file FileOp.php.

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

includes/filebackend/FileOp.php

Public Member Functions

Static Public Member Functions

Public Attributes

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation