MediaWiki  fundraising/REL1_31
ILBFactory.php
Go to the documentation of this file.
1 <?php
24 namespace Wikimedia\Rdbms;
25 
26 use InvalidArgumentException;
27 
33 interface ILBFactory {
34  const SHUTDOWN_NO_CHRONPROT = 0; // don't save DB positions at all
35  const SHUTDOWN_CHRONPROT_ASYNC = 1; // save DB positions, but don't wait on remote DCs
36  const SHUTDOWN_CHRONPROT_SYNC = 2; // save DB positions, waiting on all DCs
37 
61  public function __construct( array $conf );
62 
68  public function destroy();
69 
82  public function newMainLB( $domain = false );
83 
90  public function getMainLB( $domain = false );
91 
104  public function newExternalLB( $cluster );
105 
112  public function getExternalLB( $cluster );
113 
120  public function getAllMainLBs();
121 
128  public function getAllExternalLBs();
129 
138  public function forEachLB( $callback, array $params = [] );
139 
146  public function shutdown(
147  $mode = self::SHUTDOWN_CHRONPROT_SYNC, callable $workCallback = null, &$cpIndex = null
148  );
149 
155  public function flushReplicaSnapshots( $fname = __METHOD__ );
156 
165  public function commitAll( $fname = __METHOD__, array $options = [] );
166 
180  public function beginMasterChanges( $fname = __METHOD__ );
181 
189  public function commitMasterChanges( $fname = __METHOD__, array $options = [] );
190 
195  public function rollbackMasterChanges( $fname = __METHOD__ );
196 
202  public function hasTransactionRound();
203 
208  public function hasMasterChanges();
209 
214  public function laggedReplicaUsed();
215 
221  public function hasOrMadeRecentMasterChanges( $age = null );
222 
246  public function waitForReplication( array $opts = [] );
247 
256  public function setWaitForReplicationListener( $name, callable $callback = null );
257 
264  public function getEmptyTransactionTicket( $fname );
265 
276  public function commitAndWaitForReplication( $fname, $ticket, array $opts = [] );
277 
282  public function getChronologyProtectorTouched( $dbName );
283 
289  public function disableChronologyProtection();
290 
296  public function setDomainPrefix( $prefix );
297 
301  public function closeAll();
302 
306  public function setAgentName( $agent );
307 
317  public function appendShutdownCPIndexAsQuery( $url, $time );
318 
326  public function setRequestInfo( array $info );
327 
341  public function setTableAliases( array $aliases );
342 
356  public function setIndexAliases( array $aliases );
357 }
if(defined( 'MW_SETUP_CALLBACK')) $fname
Customization point after all loading (constants, functions, classes, DefaultSettings,...
Definition: Setup.php:112
the array() calling protocol came about after MediaWiki 1.4rc1.
see documentation in includes Linker php for Linker::makeImageLink & $time
Definition: hooks.txt:1795
null means default in associative array with keys and values unescaped Should be merged with default with a value of false meaning to suppress the attribute in associative array with keys and values unescaped & $options
Definition: hooks.txt:2001
Allows to change the fields on the form that will be generated $name
Definition: hooks.txt:302
The MIT free of to any person obtaining a copy of this software and associated documentation to deal in the Software without including without limitation the rights to use
Definition: LICENSE.txt:7
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency which acts as the top level factory for services in MediaWiki which can be used to gain access to default instances of various services MediaWikiServices however also allows new services to be defined and default services to be redefined Services are defined or redefined by providing a callback the instantiator that will return a new instance of the service When it will create an instance of MediaWikiServices and populate it with the services defined in the files listed by thereby bootstrapping the DI framework Per $wgServiceWiringFiles lists includes ServiceWiring php
Definition: injection.txt:37
An interface for generating database load balancers.
Definition: ILBFactory.php:33
beginMasterChanges( $fname=__METHOD__)
Flush any master transaction snapshots and set DBO_TRX (if DBO_DEFAULT is set)
getAllExternalLBs()
Get cached (tracked) load balancers for all external database clusters.
setDomainPrefix( $prefix)
Set a new table prefix for the existing local domain ID for testing.
shutdown( $mode=self::SHUTDOWN_CHRONPROT_SYNC, callable $workCallback=null, &$cpIndex=null)
Prepare all tracked load balancers for shutdown.
commitAll( $fname=__METHOD__, array $options=[])
Commit open transactions on all connections.
setTableAliases(array $aliases)
Make certain table names use their own database, schema, and table prefix when passed into SQL querie...
newMainLB( $domain=false)
Create a new load balancer object.
waitForReplication(array $opts=[])
Waits for the replica DBs to catch up to the current master position.
commitAndWaitForReplication( $fname, $ticket, array $opts=[])
Convenience method for safely running commitMasterChanges()/waitForReplication()
__construct(array $conf)
Construct a manager of ILoadBalancer objects.
destroy()
Disables all load balancers.
laggedReplicaUsed()
Detemine if any lagged replica DB connection was used.
getChronologyProtectorTouched( $dbName)
commitMasterChanges( $fname=__METHOD__, array $options=[])
Commit changes on all master connections.
appendShutdownCPIndexAsQuery( $url, $time)
Append ?cpPosIndex parameter to a URL for ChronologyProtector purposes if needed.
getExternalLB( $cluster)
Get a cached (tracked) load balancer for external storage.
getMainLB( $domain=false)
Get a cached (tracked) load balancer object.
disableChronologyProtection()
Disable the ChronologyProtector for all load balancers.
closeAll()
Close all open database connections on all open load balancers.
hasOrMadeRecentMasterChanges( $age=null)
Determine if any master connection has pending/written changes from this request.
hasTransactionRound()
Check if a transaction round is active.
getAllMainLBs()
Get cached (tracked) load balancers for all main database clusters.
hasMasterChanges()
Determine if any master connection has pending changes.
forEachLB( $callback, array $params=[])
Execute a function for each tracked load balancer The callback is called with the load balancer as th...
setIndexAliases(array $aliases)
Convert certain index names to alternative names before querying the DB.
getEmptyTransactionTicket( $fname)
Get a token asserting that no transaction writes are active.
newExternalLB( $cluster)
Create a new load balancer for external storage.
flushReplicaSnapshots( $fname=__METHOD__)
Commit all replica DB transactions so as to flush any REPEATABLE-READ or SSI snapshot.
setWaitForReplicationListener( $name, callable $callback=null)
Add a callback to be run in every call to waitForReplication() before waiting.
rollbackMasterChanges( $fname=__METHOD__)
Rollback changes on all master connections.
$params