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. More...

	applyDependencies (array $deps)
	Update a dependency tracking array to account for this operation. More...

	attempt ()
	Attempt the operation. More...

	attemptAsync ()
	Attempt the operation in the background. More...

	dependsOn (array $deps)
	Check if this operation changes files listed in $paths. More...

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

	getBackend ()
	Get the backend this operation is for. More...

	getJournalEntries (array $oPredicates, array $nPredicates)
	Get the file journal entries for this file operation. More...

	getParam ($name)
	Get the value of the parameter with the given name. More...

	logFailure ($action)
	Log a file operation failure and preserve any temp files. More...

	precheck (array &$predicates)
	Check preconditions of the operation without writing anything. More...

	setBatchId ($batchId)
	Set the batch UUID this operation belongs to. More...

	storagePathsChanged ()
	Get a list of storage paths written to for this operation. More...

	storagePathsRead ()
	Get a list of storage paths read from for this operation. More...

Static Public Member Functions
static	newDependencies ()
	Get a new empty dependency tracking array for paths read/written to. More...

static	newPredicates ()
	Get a new empty predicates array for precheck() More...

Public Attributes
const	STATE_ATTEMPTED = 3

const	STATE_CHECKED = 2

const	STATE_NEW = 1

Protected Member Functions
	allowedParams ()
	Get the file operation parameters. More...

	doAttempt ()

	doPrecheck (array &$predicates)

	fileExists ($source, array $predicates)
	Check if a file will exist in storage when this operation is attempted. More...

	fileSha1 ($source, array $predicates)
	Get the SHA-1 of a file in storage when this operation is attempted. More...

	getSourceSha1Base36 ()
	precheckDestExistence() helper function to get the source file SHA-1. More...

	precheckDestExistence (array $predicates)
	Check for errors with regards to the destination file already existing. More...

	setFlags (array $params)
	Adjust params to FileBackendStore internal file calls. More...

Static Protected Member Functions
static	normalizeIfValidStoragePath ($path)
	Normalize a string if it is a valid storage path. More...

Protected Attributes
bool	$async = false

FileBackendStore	$backend

string	$batchId

bool	$destExists

bool	$doOperation = true
	Operation is not a no-op. More...

bool	$failed = false

bool	$overwriteSameCase

array	$params = []

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 79 of file FileOp.php.

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

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)

Definition at line 318 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 170 of file FileOp.php.

References storagePathsChanged(), and storagePathsRead().

FileOp::attempt ( )

final

Attempt the operation.

Returns: Status

Definition at line 273 of file FileOp.php.

References $status, doAttempt(), failed(), logFailure(), Status\newFatal(), and Status\newGood().

Referenced by attemptAsync().

FileOp::attemptAsync ( )

final

Attempt the operation in the background.

Returns: Status

Definition at line 305 of file FileOp.php.

References attempt().

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 183 of file FileOp.php.

References $path, as, storagePathsChanged(), and storagePathsRead().

FileOp::doAttempt ( )

protected

Returns: Status

Definition at line 296 of file FileOp.php.

References Status\newGood().

Referenced by attempt().

FileOp::doPrecheck ( array & $predicates )

protected

Parameters

array $predicates

Returns: Status

Definition at line 264 of file FileOp.php.

References Status\newGood().

Referenced by precheck().

FileOp::failed ( )

final

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

Returns: bool

Definition at line 142 of file FileOp.php.

References $failed.

Referenced by attempt(), and precheck().

FileOp::fileExists	(		$source,
		array	$predicates
	)

finalprotected

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 410 of file FileOp.php.

References $source, and true.

Referenced by CopyFileOp\doPrecheck(), MoveFileOp\doPrecheck(), DeleteFileOp\doPrecheck(), DescribeFileOp\doPrecheck(), getJournalEntries(), and precheckDestExistence().

FileOp::fileSha1	(		$source,
		array	$predicates
	)

finalprotected

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 427 of file FileOp.php.

References $source, and true.

Referenced by DescribeFileOp\doPrecheck(), getJournalEntries(), and precheckDestExistence().

FileOp::getBackend ( )

Get the backend this operation is for.

Returns: FileBackendStore

Definition at line 444 of file FileOp.php.

References $backend.

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 205 of file FileOp.php.

References $path, as, fileExists(), fileSha1(), storagePathsChanged(), and storagePathsRead().

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 133 of file FileOp.php.

References $name.

Referenced by CopyFileOp\doAttempt(), MoveFileOp\doAttempt(), CreateFileOp\doPrecheck(), CopyFileOp\doPrecheck(), MoveFileOp\doPrecheck(), DeleteFileOp\doPrecheck(), and precheckDestExistence().

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

Definition at line 399 of file FileOp.php.

Referenced by precheckDestExistence().

FileOp::logFailure ( $action )

final

Log a file operation failure and preserve any temp files.

Parameters

string $action

Definition at line 453 of file FileOp.php.

References $e, $params, FormatJson\encode(), and wfDebugLog().

Referenced by attempt().

static FileOp::newDependencies ( )

staticfinal

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

Returns: array

Definition at line 160 of file FileOp.php.

Referenced by FileOpBatch\attempt().

static FileOp::newPredicates ( )

staticfinal

Get a new empty predicates array for precheck()

Returns: array

Definition at line 151 of file FileOp.php.

Referenced by FileOpBatch\attempt().

static FileOp::normalizeIfValidStoragePath ( $path )

staticprotected

Normalize a string if it is a valid storage path.

Parameters

string $path

Returns: string

Definition at line 108 of file FileOp.php.

References $path, $res, FileBackend\isStoragePath(), and FileBackend\normalizeStoragePath().

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 247 of file FileOp.php.

References $status, doPrecheck(), failed(), and Status\newFatal().

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 358 of file FileOp.php.

References $status, fileExists(), fileSha1(), getParam(), getSourceSha1Base36(), and Status\newGood().

Referenced by CreateFileOp\doPrecheck(), StoreFileOp\doPrecheck(), CopyFileOp\doPrecheck(), and MoveFileOp\doPrecheck().

FileOp::setBatchId ( $batchId )

final

Set the batch UUID this operation belongs to.

Parameters

string $batchId

Definition at line 123 of file FileOp.php.

References $batchId.

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 328 of file FileOp.php.

References $async, and $params.

Referenced by CreateFileOp\doAttempt(), StoreFileOp\doAttempt(), CopyFileOp\doAttempt(), MoveFileOp\doAttempt(), DeleteFileOp\doAttempt(), and DescribeFileOp\doAttempt().

FileOp::storagePathsChanged ( )

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

Returns: array

Definition at line 346 of file FileOp.php.

Referenced by applyDependencies(), dependsOn(), and getJournalEntries().

FileOp::storagePathsRead ( )

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

Returns: array

Definition at line 337 of file FileOp.php.

Referenced by applyDependencies(), dependsOn(), and getJournalEntries().

Member Data Documentation

bool FileOp::$async = false

protected

Definition at line 50 of file FileOp.php.

Referenced by setFlags().

FileBackendStore FileOp::$backend

protected

Definition at line 41 of file FileOp.php.

Referenced by __construct(), and getBackend().

string FileOp::$batchId

protected

Definition at line 53 of file FileOp.php.

Referenced by setBatchId().

bool FileOp::$destExists

protected

Definition at line 65 of file FileOp.php.

Referenced by CreateFileOp\doPrecheck(), StoreFileOp\doPrecheck(), CopyFileOp\doPrecheck(), and MoveFileOp\doPrecheck().

bool FileOp::$doOperation = true

protected

Operation is not a no-op.

Definition at line 56 of file FileOp.php.

bool FileOp::$failed = false

protected

Definition at line 47 of file FileOp.php.

Referenced by failed().

bool FileOp::$overwriteSameCase

protected

Definition at line 62 of file FileOp.php.

array FileOp::$params = []

protected

Definition at line 38 of file FileOp.php.

Referenced by logFailure(), and setFlags().

string FileOp::$sourceSha1

protected

Definition at line 59 of file FileOp.php.

Referenced by CreateFileOp\doPrecheck(), StoreFileOp\doPrecheck(), CopyFileOp\doPrecheck(), and MoveFileOp\doPrecheck().

int FileOp::$state = self::STATE_NEW

protected

Definition at line 44 of file FileOp.php.

const FileOp::STATE_ATTEMPTED = 3

Definition at line 70 of file FileOp.php.

const FileOp::STATE_CHECKED = 2

Definition at line 69 of file FileOp.php.

const FileOp::STATE_NEW = 1

Definition at line 68 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