MediaWiki REL1_39
FileOp Class Reference

FileBackend helper class for representing operations. More...

Inheritance diagram for FileOp:
Collaboration diagram for FileOp:

Public Member Functions

 __construct (FileBackendStore $backend, array $params, LoggerInterface $logger)
 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.
 
 attemptAsyncQuick ()
 Attempt the operation in the background without regards to prechecks.
 
 attemptQuick ()
 Attempt the operation without regards to prechecks.
 
 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.
 
 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.
 
 storagePathsChanged ()
 Get a list of storage paths written to for this operation.
 
 storagePathsRead ()
 Get a list of storage paths read from for this operation.
 
 storagePathsReadOrChanged ()
 Get a list of storage paths read from or written to 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()
 

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.
 
 fileSize ( $source, array $predicates)
 Get the size a file in storage will have when this operation is attempted.
 
 getSourceSha1Base36 ()
 precheckDestExistence() helper function to get the source file SHA-1.
 
 getSourceSize ()
 precheckDestExistence() helper function to get the source file size.
 
 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
 
bool $cancelled = false
 
bool $destExists
 
bool $failed = false
 
LoggerInterface $logger
 
bool $overwriteSameCase
 
array $params = []
 
string bool $sourceSha1
 
int bool $sourceSize
 
int $state = self::STATE_NEW
 
const ASSUMED_EXISTS = 'exists'
 
const ASSUMED_SHA1 = 'sha1'
 
const ASSUMED_SIZE = 'size'
 

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 37 of file FileOp.php.

Constructor & Destructor Documentation

◆ __construct()

FileOp::__construct ( FileBackendStore $backend,
array $params,
LoggerInterface $logger )
final

Build a new batch file operation transaction.

Parameters
FileBackendStore$backend
array$params
LoggerInterface$loggerPSR logger instance
Exceptions
InvalidArgumentException

Definition at line 83 of file FileOp.php.

References $backend, $logger, $params, allowedParams(), and normalizeIfValidStoragePath().

Member Function Documentation

◆ allowedParams()

FileOp::allowedParams ( )
protected

Get the file operation parameters.

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

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

Definition at line 308 of file FileOp.php.

Referenced by __construct().

◆ applyDependencies()

FileOp::applyDependencies ( array $deps)
final

Update a dependency tracking array to account for this operation.

Parameters
array$depsPrior path reads/writes; format of FileOp::newPredicates()
Returns
array

Definition at line 168 of file FileOp.php.

References storagePathsChanged(), and storagePathsRead().

◆ attempt()

FileOp::attempt ( )
final

Attempt the operation.

Returns
StatusValue

Definition at line 241 of file FileOp.php.

References doAttempt(), failed(), and logFailure().

Referenced by attemptAsync(), and attemptQuick().

◆ attemptAsync()

FileOp::attemptAsync ( )
final

Attempt the operation in the background.

Returns
StatusValue

Definition at line 273 of file FileOp.php.

References attempt().

Referenced by attemptAsyncQuick().

◆ attemptAsyncQuick()

FileOp::attemptAsyncQuick ( )
final

Attempt the operation in the background without regards to prechecks.

Returns
StatusValue

Definition at line 297 of file FileOp.php.

References attemptAsync().

◆ attemptQuick()

FileOp::attemptQuick ( )
final

Attempt the operation without regards to prechecks.

Returns
StatusValue

Definition at line 286 of file FileOp.php.

References attempt().

◆ dependsOn()

FileOp::dependsOn ( array $deps)
final

Check if this operation changes files listed in $paths.

Parameters
array$depsPrior path reads/writes; format of FileOp::newPredicates()
Returns
bool

Definition at line 181 of file FileOp.php.

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

◆ doAttempt()

FileOp::doAttempt ( )
protected
Returns
StatusValue

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

Definition at line 264 of file FileOp.php.

Referenced by attempt().

◆ doPrecheck()

FileOp::doPrecheck ( array & $predicates)
protected
Parameters
array&$predicates
Returns
StatusValue

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

Definition at line 232 of file FileOp.php.

Referenced by precheck().

◆ failed()

FileOp::failed ( )
final

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

Returns
bool

Definition at line 140 of file FileOp.php.

References $failed.

Referenced by attempt(), and precheck().

◆ fileExists()

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

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

Ideally, the file stat entry should already be preloaded via preloadFileStat(). Otherwise, this will query the backend.

Parameters
string$sourceStorage path
array$predicates
Returns
bool|null Whether the file will exist or null on error

Definition at line 433 of file FileOp.php.

References $params, $source, ASSUMED_EXISTS, and true.

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

◆ fileSha1()

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

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

Parameters
string$sourceStorage path
array$predicates
Returns
string|bool The SHA-1 hash the file will have or false if non-existent or on error

Definition at line 476 of file FileOp.php.

References $params, $source, ASSUMED_SHA1, and true.

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

◆ fileSize()

FileOp::fileSize ( $source,
array $predicates )
finalprotected

Get the size a file in storage will have when this operation is attempted.

Ideally, file the stat entry should already be preloaded via preloadFileStat() and the backend tracks hashes as extended attributes. Otherwise, this will query the backend. Get the size of a file in storage when this operation is attempted

Parameters
string$sourceStorage path
array$predicates
Returns
int|false False on failure

Definition at line 454 of file FileOp.php.

References $params, $source, ASSUMED_SIZE, and true.

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

◆ getBackend()

FileOp::getBackend ( )

Get the backend this operation is for.

Returns
FileBackendStore

Definition at line 496 of file FileOp.php.

References $backend.

◆ getParam()

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 131 of file FileOp.php.

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

◆ getSourceSha1Base36()

FileOp::getSourceSha1Base36 ( )
protected

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

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

Returns
string|false|null Returns false on failure

Reimplemented in CreateFileOp, and StoreFileOp.

Definition at line 419 of file FileOp.php.

Referenced by precheckDestExistence().

◆ getSourceSize()

FileOp::getSourceSize ( )
protected

precheckDestExistence() helper function to get the source file size.

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

Returns
int|false|null Returns false on failure

Reimplemented in CreateFileOp, and StoreFileOp.

Definition at line 409 of file FileOp.php.

Referenced by precheckDestExistence().

◆ logFailure()

FileOp::logFailure ( $action)
final

Log a file operation failure and preserve any temp files.

Parameters
string$action

Definition at line 505 of file FileOp.php.

References $params.

Referenced by attempt().

◆ newDependencies()

static FileOp::newDependencies ( )
staticfinal

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

Returns
array

Definition at line 158 of file FileOp.php.

Referenced by FileOpBatch\attempt().

◆ newPredicates()

static FileOp::newPredicates ( )
staticfinal

Get a new empty predicates array for precheck()

Returns
array

Definition at line 149 of file FileOp.php.

Referenced by FileOpBatch\attempt().

◆ normalizeIfValidStoragePath()

static FileOp::normalizeIfValidStoragePath ( $path)
staticprotected

Normalize a string if it is a valid storage path.

Parameters
string$path
Returns
string

Definition at line 115 of file FileOp.php.

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

Referenced by __construct().

◆ precheck()

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 StatusValue object is returned.

Parameters
array&$predicates
Returns
StatusValue

Definition at line 204 of file FileOp.php.

References $path, doPrecheck(), failed(), and storagePathsReadOrChanged().

◆ precheckDestExistence()

FileOp::precheckDestExistence ( array $predicates)
protected

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

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

Parameters
array$predicates
Returns
StatusValue

Definition at line 359 of file FileOp.php.

References fileExists(), fileSha1(), fileSize(), getParam(), getSourceSha1Base36(), and getSourceSize().

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

◆ setFlags()

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 $async, and $params.

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

◆ storagePathsChanged()

FileOp::storagePathsChanged ( )

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

Returns
array

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

Definition at line 336 of file FileOp.php.

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

◆ storagePathsRead()

FileOp::storagePathsRead ( )

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

Returns
array

Reimplemented in CopyFileOp, and MoveFileOp.

Definition at line 327 of file FileOp.php.

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

◆ storagePathsReadOrChanged()

FileOp::storagePathsReadOrChanged ( )
final

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

Returns
array

Definition at line 345 of file FileOp.php.

References storagePathsChanged(), and storagePathsRead().

Referenced by precheck().

Member Data Documentation

◆ $async

bool FileOp::$async = false
protected

Definition at line 51 of file FileOp.php.

Referenced by setFlags().

◆ $backend

FileBackendStore FileOp::$backend
protected

Definition at line 39 of file FileOp.php.

Referenced by __construct(), and getBackend().

◆ $cancelled

bool FileOp::$cancelled = false
protected

Definition at line 53 of file FileOp.php.

◆ $destExists

bool FileOp::$destExists
protected

◆ $failed

bool FileOp::$failed = false
protected

Definition at line 49 of file FileOp.php.

Referenced by failed().

◆ $logger

LoggerInterface FileOp::$logger
protected

Definition at line 41 of file FileOp.php.

Referenced by __construct().

◆ $overwriteSameCase

bool FileOp::$overwriteSameCase
protected

Definition at line 61 of file FileOp.php.

◆ $params

array FileOp::$params = []
protected

Definition at line 44 of file FileOp.php.

Referenced by __construct(), fileExists(), fileSha1(), fileSize(), logFailure(), and setFlags().

◆ $sourceSha1

string bool FileOp::$sourceSha1
protected

◆ $sourceSize

int bool FileOp::$sourceSize
protected

◆ $state

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

Definition at line 47 of file FileOp.php.

◆ ASSUMED_EXISTS

◆ ASSUMED_SHA1

◆ ASSUMED_SIZE


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