MySqlLockManager Class Reference
MySQL version of DBLockManager that supports shared locks. More...
Inheritance diagram for MySqlLockManager:
Collaboration diagram for MySqlLockManager:
Protected Member Functions | |
| doGetLocksOnServer ( $lockSrv, array $paths, $type) | |
| Get a connection to a lock DB and acquire locks on $paths. More... | |
| initConnection ( $lockDb, DatabaseBase $db) | |
| releaseAllLocks () | |
 Protected Member Functions inherited from DBLockManager | |
| cacheCheckFailures ( $lockDb) | |
| Checks if the DB has not recently had connection/query errors. More... | |
| cacheRecordFailure ( $lockDb) | |
| Log a lock request failure to the cache. More... | |
| freeLocksOnServer ( $lockSrv, array $pathsByType) | |
| Get a connection to a lock server and release locks on $paths. More... | |
| getConnection ( $lockDb) | |
| Get (or reuse) a connection to a lock DB. More... | |
| getLocksOnServer ( $lockSrv, array $pathsByType) | |
| Get a connection to a lock server and acquire locks. More... | |
| getMissKey ( $lockDb) | |
| Get a cache key for recent query misses for a DB. More... | |
| isServerUp ( $lockSrv) | |
| Protected Member Functions inherited from QuorumLockManager | |
| doLock (array $paths, $type) | |
| Lock resources with the given keys and lock type. More... | |
| doLockByType (array $pathsByType) | |
| doLockingRequestBucket ( $bucket, array $pathsByType) | |
| Attempt to acquire locks with the peers for a bucket. More... | |
| doUnlock (array $paths, $type) | |
| Unlock resources with the given keys and lock type. More... | |
| doUnlockByType (array $pathsByType) | |
| doUnlockingRequestBucket ( $bucket, array $pathsByType) | |
| Attempt to release locks with the peers for a bucket. More... | |
| getBucketFromPath ( $path) | |
| Get the bucket for resource path. More... | |
| Protected Member Functions inherited from LockManager | |
| normalizePathsByType (array $pathsByType) | |
| Normalize the $paths array by converting LOCK_UW locks into the appropriate type and removing any duplicated paths for each lock type. More... | |
| sha1Base16Absolute ( $path) | |
| Get the base 16 SHA-1 of a string, padded to 31 digits. More... | |
| sha1Base36Absolute ( $path) | |
| Get the base 36 SHA-1 of a string, padded to 31 digits. More... | |
Protected Attributes | |
| array | $lockTypeMap |
| Mapping of lock types to the type actually used *. More... | |
| Protected Attributes inherited from DBLockManager | |
| array | $conns = array() |
| Map Database connections (DB name => Database) *. More... | |
| array | $dbServers |
| Map of DB names to server config *. More... | |
| $lockExpiry | |
| $safeDelay | |
| $session = 0 | |
| BagOStuff | $statusCache |
| Protected Attributes inherited from QuorumLockManager | |
| array | $degradedBuckets = array() |
| Map of degraded buckets *. More... | |
| array | $srvsByBucket = array() |
| Map of bucket indexes to peer server lists *. More... | |
| Protected Attributes inherited from LockManager | |
| $domain | |
| array | $locksHeld = array() |
| Map of (resource path => lock type => count) *. More... | |
| $lockTTL | |
| array | $lockTypeMap |
| Mapping of lock types to the type actually used *. More... | |
Additional Inherited Members | |
| Public Member Functions inherited from DBLockManager | |
| __construct (array $config) | |
| Construct a new instance from configuration. More... | |
| __destruct () | |
| Make sure remaining locks get cleared for sanity. More... | |
| Public Member Functions inherited from LockManager | |
| lock (array $paths, $type=self::LOCK_EX, $timeout=0) | |
| Lock the resources at the given abstract paths. More... | |
| lockByType (array $pathsByType, $timeout=0) | |
| Lock the resources at the given abstract paths. More... | |
| unlock (array $paths, $type=self::LOCK_EX) | |
| Unlock the resources at the given abstract paths. More... | |
| unlockByType (array $pathsByType) | |
| Unlock the resources at the given abstract paths. More... | |
| Public Attributes inherited from LockManager | |
| const | LOCK_EX = 3 |
| const | LOCK_SH = 1 |
| Lock types; stronger locks have higher values. More... | |
| const | LOCK_UW = 2 |
Detailed Description
MySQL version of DBLockManager that supports shared locks.
All locks are non-blocking, which avoids deadlocks.
Definition at line 244 of file DBLockManager.php.
Member Function Documentation
◆ doGetLocksOnServer()
|
protected |
Get a connection to a lock DB and acquire locks on $paths.
This does not use GET_LOCK() per http://bugs.mysql.com/bug.php?id=1118.
- Parameters
-
string $lockSrv array $paths string $type
- Returns
- Status
Definition at line 270 of file DBLockManager.php.
References $keys, $path, $type, array(), as, DBLockManager\getConnection(), Status\newGood(), and LockManager\sha1Base36Absolute().
◆ initConnection()
|
protected |
- Parameters
-
string $lockDb DatabaseBase $db
Reimplemented from DBLockManager.
Definition at line 255 of file DBLockManager.php.
References DatabaseBase\query().
◆ releaseAllLocks()
|
protected |
- Returns
- Status
Reimplemented from QuorumLockManager.
Definition at line 340 of file DBLockManager.php.
References $e, as, and Status\newGood().
Member Data Documentation
◆ $lockTypeMap
|
protected |
Initial value:
= array(
self::LOCK_SH => self::LOCK_SH,
self::LOCK_UW => self::LOCK_SH,
self::LOCK_EX => self::LOCK_EX
)
Mapping of lock types to the type actually used *.
Definition at line 245 of file DBLockManager.php.
The documentation for this class was generated from the following file:
- includes/filebackend/lockmanager/DBLockManager.php
