Public Member Functions |
Static Public Member Functions |
Protected Member Functions |
Private Attributes |
List of all members
Wikimedia\Rdbms\LoadBalancerSingle Class Reference
Trivial LoadBalancer that always returns an injected connection handle. More...
Inheritance diagram for Wikimedia\Rdbms\LoadBalancerSingle:
Collaboration diagram for Wikimedia\Rdbms\LoadBalancerSingle:
Public Member Functions | |
| __construct (array $params) | |
 Public Member Functions inherited from Wikimedia\Rdbms\LoadBalancer | |
| __destruct () | |
| allowLagged ( $mode=null) | |
| Disables/enables lag checks. More... | |
| approveMasterChanges (array $options) | |
| Perform all pre-commit checks for things like replication safety. More... | |
| beginMasterChanges ( $fname=__METHOD__) | |
| Flush any master transaction snapshots and set DBO_TRX (if DBO_DEFAULT is set) More... | |
| closeAll () | |
| Close all open connections. More... | |
| closeConnection (IDatabase $conn) | |
| Close a connection. More... | |
| commitAll ( $fname=__METHOD__) | |
| Commit transactions on all open connections. More... | |
| commitMasterChanges ( $fname=__METHOD__) | |
| Issue COMMIT on all master connections where writes where done. More... | |
| disable () | |
| Disable this load balancer. More... | |
| finalizeMasterChanges () | |
| Perform all pre-commit callbacks that remain part of the atomic transactions and disable any post-commit callbacks until runMasterPostTrxCallbacks() More... | |
| flushReplicaSnapshots ( $fname=__METHOD__) | |
| Commit all replica DB transactions so as to flush any REPEATABLE-READ or SSI snapshot. More... | |
| forEachOpenConnection ( $callback, array $params=[]) | |
| Call a function with each open connection object. More... | |
| forEachOpenMasterConnection ( $callback, array $params=[]) | |
| Call a function with each open connection object to a master. More... | |
| forEachOpenReplicaConnection ( $callback, array $params=[]) | |
| Call a function with each open replica DB connection object. More... | |
| getAnyOpenConnection ( $i) | |
| getConnection ( $i, $groups=[], $domain=false) | |
| getConnectionRef ( $db, $groups=[], $domain=false) | |
| Get a database connection handle reference. More... | |
| getLaggedReplicaMode ( $domain=false) | |
| getLaggedSlaveMode ( $domain=false) | |
| getLagTimes ( $domain=false) | |
| Get an estimate of replication lag (in seconds) for each server. More... | |
| getLazyConnectionRef ( $db, $groups=[], $domain=false) | |
| Get a database connection handle reference without connecting yet. More... | |
| getMaintenanceConnectionRef ( $db, $groups=[], $domain=false) | |
| Get a maintenance database connection handle reference for migrations and schema changes. More... | |
| getMasterPos () | |
| Get the current master position for chronology control purposes. More... | |
| getMaxLag ( $domain=false) | |
| Get the hostname and lag time of the most-lagged replica DB. More... | |
| getReaderIndex ( $group=false, $domain=false) | |
| Get the index of the reader connection, which may be a replica DB. More... | |
| getReadOnlyReason ( $domain=false, IDatabase $conn=null) | |
| getServerCount () | |
| Get the number of defined servers (not the number of open connections) More... | |
| getServerInfo ( $i) | |
| Return the server info structure for a given index, or false if the index is invalid. More... | |
| getServerName ( $i) | |
| Get the host name or IP address of the server with the specified index Prefer a readable name if available. More... | |
| getWriterIndex () | |
| hasMasterChanges () | |
| Determine if there are pending changes in a transaction by this thread. More... | |
| hasMasterConnection () | |
| hasOrMadeRecentMasterChanges ( $age=null) | |
| Check if this load balancer object had any recent or still pending writes issued against it by this PHP thread. More... | |
| haveIndex ( $i) | |
| Returns true if the specified index is a valid server index. More... | |
| isNonZeroLoad ( $i) | |
| Returns true if the specified index is valid and has non-zero load. More... | |
| laggedReplicaUsed () | |
| Checks whether the database for generic connections this request was both: More... | |
| laggedSlaveUsed () | |
| lastMasterChangeTimestamp () | |
| Get the timestamp of the latest write query done by this thread. More... | |
| openConnection ( $i, $domain=false) | |
| pendingMasterChangeCallers () | |
| Get the list of callers that have pending master changes. More... | |
| pingAll () | |
| reuseConnection ( $conn) | |
| Mark a foreign connection as being available for reuse under a different DB domain. More... | |
| rollbackMasterChanges ( $fname=__METHOD__) | |
| Issue ROLLBACK only on master, only if queries were done on connection. More... | |
| runMasterPostTrxCallbacks ( $type) | |
| Issue all pending post-COMMIT/ROLLBACK callbacks. More... | |
| safeGetLag (IDatabase $conn) | |
| Get the lag in seconds for a given connection, or zero if this load balancer does not have replication enabled. More... | |
| safeWaitForMasterPos (IDatabase $conn, $pos=false, $timeout=10) | |
| setDomainPrefix ( $prefix) | |
| Set a new table prefix for the existing local domain ID for testing. More... | |
| setServerInfo ( $i, array $serverInfo) | |
| Sets the server info structure for the given index. More... | |
| setTableAliases (array $aliases) | |
| Make certain table names use their own database, schema, and table prefix when passed into SQL queries pre-escaped and without a qualified database name. More... | |
| setTransactionListener ( $name, callable $callback=null) | |
| Set a callback via IDatabase::setTransactionListener() on all current and future master connections of this load balancer. More... | |
| suppressTransactionEndCallbacks () | |
| Suppress all pending post-COMMIT/ROLLBACK callbacks. More... | |
| waitFor ( $pos) | |
| Set the master wait position. More... | |
| waitForAll ( $pos, $timeout=null) | |
| Set the master wait position and wait for ALL replica DBs to catch up to it. More... | |
| waitForOne ( $pos, $timeout=null) | |
| Set the master wait position and wait for a "generic" replica DB to catch up to it. More... | |
Static Public Member Functions | |
| static | newFromConnection (IDatabase $db, array $params=[]) |
Protected Member Functions | |
| reallyOpenConnection (array $server, $dbNameOverride=false) | |
| Really opens a connection. More... | |
| Protected Member Functions inherited from Wikimedia\Rdbms\LoadBalancer | |
| doWait ( $index, $open=false, $timeout=null) | |
| Wait for a given replica DB to catch up to the master pos stored in $this. More... | |
| getScopedPHPBehaviorForCommit () | |
| Make PHP ignore user aborts/disconnects until the returned value leaves scope. More... | |
Private Attributes | |
| IDatabase | $db |
Additional Inherited Members | |
| Protected Attributes inherited from Wikimedia\Rdbms\LoadBalancer | |
| string | $agent |
| Agent name for query profiling. More... | |
| bool | $cliMode |
| Whether this PHP instance is for a CLI script. More... | |
| LoggerInterface | $connLogger |
| LoggerInterface | $perfLogger |
| object string | $profiler |
| Class name or object With profileIn/profileOut methods. More... | |
| LoggerInterface | $queryLogger |
| LoggerInterface | $replLogger |
| TransactionProfiler | $trxProfiler |
Detailed Description
Trivial LoadBalancer that always returns an injected connection handle.
Definition at line 31 of file LoadBalancerSingle.php.
Constructor & Destructor Documentation
◆ __construct()
| Wikimedia\Rdbms\LoadBalancerSingle::__construct | ( | array | $params | ) |
- Parameters
-
array $params An associative array with one member: - connection: An IDatabase connection object
Reimplemented from Wikimedia\Rdbms\LoadBalancer.
Definition at line 39 of file LoadBalancerSingle.php.
References $params.
Member Function Documentation
◆ newFromConnection()
|
static |
- Parameters
-
IDatabase $db Live connection handle array $params Parameter map to LoadBalancerSingle::__constructs()
- Returns
- LoadBalancerSingle
- Since
- 1.28
Definition at line 71 of file LoadBalancerSingle.php.
References Wikimedia\Rdbms\LoadBalancerSingle\$db, and $params.
◆ reallyOpenConnection()
|
protected |
Really opens a connection.
Uncached. Returns a Database object whether or not the connection was successful. @access private
- Parameters
-
array $server string | bool $dbNameOverride Use "" to not select any database
- Returns
- Database
- Exceptions
-
DBAccessError InvalidArgumentException
Reimplemented from Wikimedia\Rdbms\LoadBalancer.
Definition at line 75 of file LoadBalancerSingle.php.
References Wikimedia\Rdbms\LoadBalancerSingle\$db.
Member Data Documentation
◆ $db
|
private |
Definition at line 33 of file LoadBalancerSingle.php.
Referenced by Wikimedia\Rdbms\LoadBalancerSingle\newFromConnection(), and Wikimedia\Rdbms\LoadBalancerSingle\reallyOpenConnection().
The documentation for this class was generated from the following file:
- includes/libs/rdbms/loadbalancer/LoadBalancerSingle.php
