'KuConverter' => __DIR__ . '/languages/classes/LanguageKu.php',
'LBFactory' => __DIR__ . '/includes/libs/rdbms/lbfactory/LBFactory.php',
'LBFactoryMW' => __DIR__ . '/includes/db/loadbalancer/LBFactoryMW.php',
- 'LBFactoryMulti' => __DIR__ . '/includes/db/loadbalancer/LBFactoryMulti.php',
+ 'LBFactoryMulti' => __DIR__ . '/includes/libs/rdbms/lbfactory/LBFactoryMulti.php',
'LBFactorySimple' => __DIR__ . '/includes/libs/rdbms/lbfactory/LBFactorySimple.php',
'LBFactorySingle' => __DIR__ . '/includes/db/loadbalancer/LBFactorySingle.php',
'LCStore' => __DIR__ . '/includes/cache/localisation/LCStore.php',
+++ /dev/null
-<?php
-/**
- * Advanced generator of database load balancing objects for wiki farms.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- * http://www.gnu.org/copyleft/gpl.html
- *
- * @file
- * @ingroup Database
- */
-
-/**
- * A multi-wiki, multi-master factory for Wikimedia and similar installations.
- * Ignores the old configuration globals.
- *
- * Template override precedence (highest => lowest):
- * - templateOverridesByServer
- * - masterTemplateOverrides
- * - templateOverridesBySection/templateOverridesByCluster
- * - externalTemplateOverrides
- * - serverTemplate
- * Overrides only work on top level keys (so nested values will not be merged).
- *
- * Configuration:
- * sectionsByDB A map of database names to section names.
- *
- * sectionLoads A 2-d map. For each section, gives a map of server names to
- * load ratios. For example:
- * [
- * 'section1' => [
- * 'db1' => 100,
- * 'db2' => 100
- * ]
- * ]
- *
- * serverTemplate A server info associative array as documented for $wgDBservers.
- * The host, hostName and load entries will be overridden.
- *
- * groupLoadsBySection A 3-d map giving server load ratios for each section and group.
- * For example:
- * [
- * 'section1' => [
- * 'group1' => [
- * 'db1' => 100,
- * 'db2' => 100
- * ]
- * ]
- * ]
- *
- * groupLoadsByDB A 3-d map giving server load ratios by DB name.
- *
- * hostsByName A map of hostname to IP address.
- *
- * externalLoads A map of external storage cluster name to server load map.
- *
- * externalTemplateOverrides A set of server info keys overriding serverTemplate for external
- * storage.
- *
- * templateOverridesByServer A 2-d map overriding serverTemplate and
- * externalTemplateOverrides on a server-by-server basis. Applies
- * to both core and external storage.
- * templateOverridesBySection A 2-d map overriding the server info by section.
- * templateOverridesByCluster A 2-d map overriding the server info by external storage cluster.
- *
- * masterTemplateOverrides An override array for all master servers.
- *
- * loadMonitorClass Name of the LoadMonitor class to always use.
- *
- * readOnlyBySection A map of section name to read-only message.
- * Missing or false for read/write.
- *
- * @ingroup Database
- */
-class LBFactoryMulti extends LBFactoryMW {
- /** @var array A map of database names to section names */
- private $sectionsByDB;
-
- /**
- * @var array A 2-d map. For each section, gives a map of server names to
- * load ratios
- */
- private $sectionLoads;
-
- /**
- * @var array A server info associative array as documented for
- * $wgDBservers. The host, hostName and load entries will be
- * overridden
- */
- private $serverTemplate;
-
- // Optional settings
-
- /** @var array A 3-d map giving server load ratios for each section and group */
- private $groupLoadsBySection = [];
-
- /** @var array A 3-d map giving server load ratios by DB name */
- private $groupLoadsByDB = [];
-
- /** @var array A map of hostname to IP address */
- private $hostsByName = [];
-
- /** @var array A map of external storage cluster name to server load map */
- private $externalLoads = [];
-
- /**
- * @var array A set of server info keys overriding serverTemplate for
- * external storage
- */
- private $externalTemplateOverrides;
-
- /**
- * @var array A 2-d map overriding serverTemplate and
- * externalTemplateOverrides on a server-by-server basis. Applies to both
- * core and external storage
- */
- private $templateOverridesByServer;
-
- /** @var array A 2-d map overriding the server info by section */
- private $templateOverridesBySection;
-
- /** @var array A 2-d map overriding the server info by external storage cluster */
- private $templateOverridesByCluster;
-
- /** @var array An override array for all master servers */
- private $masterTemplateOverrides;
-
- /**
- * @var array|bool A map of section name to read-only message. Missing or
- * false for read/write
- */
- private $readOnlyBySection = [];
-
- // Other stuff
-
- /** @var array Load balancer factory configuration */
- private $conf;
-
- /** @var LoadBalancer[] */
- private $mainLBs = [];
-
- /** @var LoadBalancer[] */
- private $extLBs = [];
-
- /** @var string */
- private $loadMonitorClass;
-
- /** @var string */
- private $lastWiki;
-
- /** @var string */
- private $lastSection;
-
- /**
- * @param array $conf
- * @throws InvalidArgumentException
- */
- public function __construct( array $conf ) {
- parent::__construct( $conf );
-
- $this->conf = $conf;
- $required = [ 'sectionsByDB', 'sectionLoads', 'serverTemplate' ];
- $optional = [ 'groupLoadsBySection', 'groupLoadsByDB', 'hostsByName',
- 'externalLoads', 'externalTemplateOverrides', 'templateOverridesByServer',
- 'templateOverridesByCluster', 'templateOverridesBySection', 'masterTemplateOverrides',
- 'readOnlyBySection', 'loadMonitorClass' ];
-
- foreach ( $required as $key ) {
- if ( !isset( $conf[$key] ) ) {
- throw new InvalidArgumentException( __CLASS__ . ": $key is required in configuration" );
- }
- $this->$key = $conf[$key];
- }
-
- foreach ( $optional as $key ) {
- if ( isset( $conf[$key] ) ) {
- $this->$key = $conf[$key];
- }
- }
- }
-
- /**
- * @param bool|string $wiki
- * @return string
- */
- private function getSectionForWiki( $wiki = false ) {
- if ( $this->lastWiki === $wiki ) {
- return $this->lastSection;
- }
- list( $dbName, ) = $this->getDBNameAndPrefix( $wiki );
- if ( isset( $this->sectionsByDB[$dbName] ) ) {
- $section = $this->sectionsByDB[$dbName];
- } else {
- $section = 'DEFAULT';
- }
- $this->lastSection = $section;
- $this->lastWiki = $wiki;
-
- return $section;
- }
-
- /**
- * @param bool|string $wiki
- * @return LoadBalancer
- */
- public function newMainLB( $wiki = false ) {
- list( $dbName, ) = $this->getDBNameAndPrefix( $wiki );
- $section = $this->getSectionForWiki( $wiki );
- if ( isset( $this->groupLoadsByDB[$dbName] ) ) {
- $groupLoads = $this->groupLoadsByDB[$dbName];
- } else {
- $groupLoads = [];
- }
-
- if ( isset( $this->groupLoadsBySection[$section] ) ) {
- $groupLoads = array_merge_recursive( $groupLoads, $this->groupLoadsBySection[$section] );
- }
-
- $readOnlyReason = $this->readOnlyReason;
- // Use the LB-specific read-only reason if everything isn't already read-only
- if ( $readOnlyReason === false && isset( $this->readOnlyBySection[$section] ) ) {
- $readOnlyReason = $this->readOnlyBySection[$section];
- }
-
- $template = $this->serverTemplate;
- if ( isset( $this->templateOverridesBySection[$section] ) ) {
- $template = $this->templateOverridesBySection[$section] + $template;
- }
-
- return $this->newLoadBalancer(
- $template,
- $this->sectionLoads[$section],
- $groupLoads,
- $readOnlyReason
- );
- }
-
- /**
- * @param bool|string $wiki
- * @return LoadBalancer
- */
- public function getMainLB( $wiki = false ) {
- $section = $this->getSectionForWiki( $wiki );
- if ( !isset( $this->mainLBs[$section] ) ) {
- $lb = $this->newMainLB( $wiki );
- $this->getChronologyProtector()->initLB( $lb );
- $this->mainLBs[$section] = $lb;
- }
-
- return $this->mainLBs[$section];
- }
-
- /**
- * @param string $cluster
- * @param bool|string $wiki
- * @throws InvalidArgumentException
- * @return LoadBalancer
- */
- protected function newExternalLB( $cluster, $wiki = false ) {
- if ( !isset( $this->externalLoads[$cluster] ) ) {
- throw new InvalidArgumentException( __METHOD__ . ": Unknown cluster \"$cluster\"" );
- }
- $template = $this->serverTemplate;
- if ( isset( $this->externalTemplateOverrides ) ) {
- $template = $this->externalTemplateOverrides + $template;
- }
- if ( isset( $this->templateOverridesByCluster[$cluster] ) ) {
- $template = $this->templateOverridesByCluster[$cluster] + $template;
- }
-
- return $this->newLoadBalancer(
- $template,
- $this->externalLoads[$cluster],
- [],
- $this->readOnlyReason
- );
- }
-
- /**
- * @param string $cluster External storage cluster, or false for core
- * @param bool|string $wiki Wiki ID, or false for the current wiki
- * @return LoadBalancer
- */
- public function getExternalLB( $cluster, $wiki = false ) {
- if ( !isset( $this->extLBs[$cluster] ) ) {
- $this->extLBs[$cluster] = $this->newExternalLB( $cluster, $wiki );
- $this->getChronologyProtector()->initLB( $this->extLBs[$cluster] );
- }
-
- return $this->extLBs[$cluster];
- }
-
- /**
- * Make a new load balancer object based on template and load array
- *
- * @param array $template
- * @param array $loads
- * @param array $groupLoads
- * @param string|bool $readOnlyReason
- * @return LoadBalancer
- */
- private function newLoadBalancer( $template, $loads, $groupLoads, $readOnlyReason ) {
- $lb = new LoadBalancer( array_merge(
- $this->baseLoadBalancerParams(),
- [
- 'servers' => $this->makeServerArray( $template, $loads, $groupLoads ),
- 'loadMonitor' => $this->loadMonitorClass,
- 'readOnlyReason' => $readOnlyReason
- ]
- ) );
- $this->initLoadBalancer( $lb );
-
- return $lb;
- }
-
- /**
- * Make a server array as expected by LoadBalancer::__construct, using a template and load array
- *
- * @param array $template
- * @param array $loads
- * @param array $groupLoads
- * @return array
- */
- private function makeServerArray( $template, $loads, $groupLoads ) {
- $servers = [];
- $master = true;
- $groupLoadsByServer = $this->reindexGroupLoads( $groupLoads );
- foreach ( $groupLoadsByServer as $server => $stuff ) {
- if ( !isset( $loads[$server] ) ) {
- $loads[$server] = 0;
- }
- }
- foreach ( $loads as $serverName => $load ) {
- $serverInfo = $template;
- if ( $master ) {
- $serverInfo['master'] = true;
- if ( isset( $this->masterTemplateOverrides ) ) {
- $serverInfo = $this->masterTemplateOverrides + $serverInfo;
- }
- $master = false;
- } else {
- $serverInfo['replica'] = true;
- }
- if ( isset( $this->templateOverridesByServer[$serverName] ) ) {
- $serverInfo = $this->templateOverridesByServer[$serverName] + $serverInfo;
- }
- if ( isset( $groupLoadsByServer[$serverName] ) ) {
- $serverInfo['groupLoads'] = $groupLoadsByServer[$serverName];
- }
- if ( isset( $this->hostsByName[$serverName] ) ) {
- $serverInfo['host'] = $this->hostsByName[$serverName];
- } else {
- $serverInfo['host'] = $serverName;
- }
- $serverInfo['hostName'] = $serverName;
- $serverInfo['load'] = $load;
- $serverInfo += [ 'flags' => DBO_DEFAULT ];
-
- $servers[] = $serverInfo;
- }
-
- return $servers;
- }
-
- /**
- * Take a group load array indexed by group then server, and reindex it by server then group
- * @param array $groupLoads
- * @return array
- */
- private function reindexGroupLoads( $groupLoads ) {
- $reindexed = [];
- foreach ( $groupLoads as $group => $loads ) {
- foreach ( $loads as $server => $load ) {
- $reindexed[$server][$group] = $load;
- }
- }
-
- return $reindexed;
- }
-
- /**
- * Get the database name and prefix based on the wiki ID
- * @param bool|string $wiki
- * @return array
- */
- private function getDBNameAndPrefix( $wiki = false ) {
- if ( $wiki === false ) {
- global $wgDBname, $wgDBprefix;
-
- return [ $wgDBname, $wgDBprefix ];
- } else {
- return wfSplitWikiID( $wiki );
- }
- }
-
- /**
- * Execute a function for each tracked load balancer
- * The callback is called with the load balancer as the first parameter,
- * and $params passed as the subsequent parameters.
- * @param callable $callback
- * @param array $params
- */
- public function forEachLB( $callback, array $params = [] ) {
- foreach ( $this->mainLBs as $lb ) {
- call_user_func_array( $callback, array_merge( [ $lb ], $params ) );
- }
- foreach ( $this->extLBs as $lb ) {
- call_user_func_array( $callback, array_merge( [ $lb ], $params ) );
- }
- }
-}
* Create a new load balancer object. The resulting object will be untracked,
* not chronology-protected, and the caller is responsible for cleaning it up.
*
- * @param bool|string $domain Wiki ID, or false for the current wiki
+ * @param bool|string $domain Domain ID, or false for the current domain
* @return ILoadBalancer
*/
abstract public function newMainLB( $domain = false );
/**
* Get a cached (tracked) load balancer object.
*
- * @param bool|string $domain Wiki ID, or false for the current wiki
+ * @param bool|string $domain Domain ID, or false for the current domain
* @return ILoadBalancer
*/
abstract public function getMainLB( $domain = false );
* cleaning it up.
*
* @param string $cluster External storage cluster, or false for core
- * @param bool|string $domain Wiki ID, or false for the current wiki
+ * @param bool|string $domain Domain ID, or false for the current domain
* @return ILoadBalancer
*/
abstract protected function newExternalLB( $cluster, $domain = false );
* Get a cached (tracked) load balancer for external storage
*
* @param string $cluster External storage cluster, or false for core
- * @param bool|string $domain Wiki ID, or false for the current wiki
+ * @param bool|string $domain Domain ID, or false for the current domain
* @return ILoadBalancer
*/
abstract public function getExternalLB( $cluster, $domain = false );
--- /dev/null
+<?php
+/**
+ * Advanced generator of database load balancing objects for database farms.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @ingroup Database
+ */
+
+/**
+ * A multi-database, multi-master factory for Wikimedia and similar installations.
+ * Ignores the old configuration globals.
+ *
+ * Template override precedence (highest => lowest):
+ * - templateOverridesByServer
+ * - masterTemplateOverrides
+ * - templateOverridesBySection/templateOverridesByCluster
+ * - externalTemplateOverrides
+ * - serverTemplate
+ * Overrides only work on top level keys (so nested values will not be merged).
+ *
+ * Configuration:
+ * sectionsByDB A map of database names to section names.
+ *
+ * sectionLoads A 2-d map. For each section, gives a map of server names to
+ * load ratios. For example:
+ * [
+ * 'section1' => [
+ * 'db1' => 100,
+ * 'db2' => 100
+ * ]
+ * ]
+ *
+ * serverTemplate A server info associative array as documented for $wgDBservers.
+ * The host, hostName and load entries will be overridden.
+ *
+ * groupLoadsBySection A 3-d map giving server load ratios for each section and group.
+ * For example:
+ * [
+ * 'section1' => [
+ * 'group1' => [
+ * 'db1' => 100,
+ * 'db2' => 100
+ * ]
+ * ]
+ * ]
+ *
+ * groupLoadsByDB A 3-d map giving server load ratios by DB name.
+ *
+ * hostsByName A map of hostname to IP address.
+ *
+ * externalLoads A map of external storage cluster name to server load map.
+ *
+ * externalTemplateOverrides A set of server info keys overriding serverTemplate for external
+ * storage.
+ *
+ * templateOverridesByServer A 2-d map overriding serverTemplate and
+ * externalTemplateOverrides on a server-by-server basis. Applies
+ * to both core and external storage.
+ * templateOverridesBySection A 2-d map overriding the server info by section.
+ * templateOverridesByCluster A 2-d map overriding the server info by external storage cluster.
+ *
+ * masterTemplateOverrides An override array for all master servers.
+ *
+ * loadMonitorClass Name of the LoadMonitor class to always use.
+ *
+ * readOnlyBySection A map of section name to read-only message.
+ * Missing or false for read/write.
+ *
+ * @ingroup Database
+ */
+class LBFactoryMulti extends LBFactory {
+ /** @var array A map of database names to section names */
+ private $sectionsByDB;
+
+ /**
+ * @var array A 2-d map. For each section, gives a map of server names to
+ * load ratios
+ */
+ private $sectionLoads;
+
+ /**
+ * @var array[] Server info associative array
+ * @note The host, hostName and load entries will be overridden
+ */
+ private $serverTemplate;
+
+ // Optional settings
+
+ /** @var array A 3-d map giving server load ratios for each section and group */
+ private $groupLoadsBySection = [];
+
+ /** @var array A 3-d map giving server load ratios by DB name */
+ private $groupLoadsByDB = [];
+
+ /** @var array A map of hostname to IP address */
+ private $hostsByName = [];
+
+ /** @var array A map of external storage cluster name to server load map */
+ private $externalLoads = [];
+
+ /**
+ * @var array A set of server info keys overriding serverTemplate for
+ * external storage
+ */
+ private $externalTemplateOverrides;
+
+ /**
+ * @var array A 2-d map overriding serverTemplate and
+ * externalTemplateOverrides on a server-by-server basis. Applies to both
+ * core and external storage
+ */
+ private $templateOverridesByServer;
+
+ /** @var array A 2-d map overriding the server info by section */
+ private $templateOverridesBySection;
+
+ /** @var array A 2-d map overriding the server info by external storage cluster */
+ private $templateOverridesByCluster;
+
+ /** @var array An override array for all master servers */
+ private $masterTemplateOverrides;
+
+ /**
+ * @var array|bool A map of section name to read-only message. Missing or
+ * false for read/write
+ */
+ private $readOnlyBySection = [];
+
+ // Other stuff
+
+ /** @var array Load balancer factory configuration */
+ private $conf;
+
+ /** @var LoadBalancer[] */
+ private $mainLBs = [];
+
+ /** @var LoadBalancer[] */
+ private $extLBs = [];
+
+ /** @var string */
+ private $loadMonitorClass;
+
+ /** @var string */
+ private $lastDomain;
+
+ /** @var string */
+ private $lastSection;
+
+ /**
+ * @param array $conf
+ * @throws InvalidArgumentException
+ */
+ public function __construct( array $conf ) {
+ parent::__construct( $conf );
+
+ $this->conf = $conf;
+ $required = [ 'sectionsByDB', 'sectionLoads', 'serverTemplate' ];
+ $optional = [ 'groupLoadsBySection', 'groupLoadsByDB', 'hostsByName',
+ 'externalLoads', 'externalTemplateOverrides', 'templateOverridesByServer',
+ 'templateOverridesByCluster', 'templateOverridesBySection', 'masterTemplateOverrides',
+ 'readOnlyBySection', 'loadMonitorClass' ];
+
+ foreach ( $required as $key ) {
+ if ( !isset( $conf[$key] ) ) {
+ throw new InvalidArgumentException( __CLASS__ . ": $key is required." );
+ }
+ $this->$key = $conf[$key];
+ }
+
+ foreach ( $optional as $key ) {
+ if ( isset( $conf[$key] ) ) {
+ $this->$key = $conf[$key];
+ }
+ }
+ }
+
+ /**
+ * @param bool|string $domain
+ * @return string
+ */
+ private function getSectionForDomain( $domain = false ) {
+ if ( $this->lastDomain === $domain ) {
+ return $this->lastSection;
+ }
+ list( $dbName, ) = $this->getDBNameAndPrefix( $domain );
+ if ( isset( $this->sectionsByDB[$dbName] ) ) {
+ $section = $this->sectionsByDB[$dbName];
+ } else {
+ $section = 'DEFAULT';
+ }
+ $this->lastSection = $section;
+ $this->lastDomain = $domain;
+
+ return $section;
+ }
+
+ /**
+ * @param bool|string $domain
+ * @return LoadBalancer
+ */
+ public function newMainLB( $domain = false ) {
+ list( $dbName, ) = $this->getDBNameAndPrefix( $domain );
+ $section = $this->getSectionForDomain( $domain );
+ if ( isset( $this->groupLoadsByDB[$dbName] ) ) {
+ $groupLoads = $this->groupLoadsByDB[$dbName];
+ } else {
+ $groupLoads = [];
+ }
+
+ if ( isset( $this->groupLoadsBySection[$section] ) ) {
+ $groupLoads = array_merge_recursive(
+ $groupLoads, $this->groupLoadsBySection[$section] );
+ }
+
+ $readOnlyReason = $this->readOnlyReason;
+ // Use the LB-specific read-only reason if everything isn't already read-only
+ if ( $readOnlyReason === false && isset( $this->readOnlyBySection[$section] ) ) {
+ $readOnlyReason = $this->readOnlyBySection[$section];
+ }
+
+ $template = $this->serverTemplate;
+ if ( isset( $this->templateOverridesBySection[$section] ) ) {
+ $template = $this->templateOverridesBySection[$section] + $template;
+ }
+
+ return $this->newLoadBalancer(
+ $template,
+ $this->sectionLoads[$section],
+ $groupLoads,
+ $readOnlyReason
+ );
+ }
+
+ /**
+ * @param DatabaseDomain|string|bool $domain Domain ID, or false for the current domain
+ * @return LoadBalancer
+ */
+ public function getMainLB( $domain = false ) {
+ $section = $this->getSectionForDomain( $domain );
+ if ( !isset( $this->mainLBs[$section] ) ) {
+ $lb = $this->newMainLB( $domain );
+ $this->getChronologyProtector()->initLB( $lb );
+ $this->mainLBs[$section] = $lb;
+ }
+
+ return $this->mainLBs[$section];
+ }
+
+ /**
+ * @param string $cluster
+ * @param DatabaseDomain|string|bool $domain Domain ID, or false for the current domain
+ * @throws InvalidArgumentException
+ * @return LoadBalancer
+ */
+ protected function newExternalLB( $cluster, $domain = false ) {
+ if ( !isset( $this->externalLoads[$cluster] ) ) {
+ throw new InvalidArgumentException( __METHOD__ . ": Unknown cluster \"$cluster\"" );
+ }
+ $template = $this->serverTemplate;
+ if ( isset( $this->externalTemplateOverrides ) ) {
+ $template = $this->externalTemplateOverrides + $template;
+ }
+ if ( isset( $this->templateOverridesByCluster[$cluster] ) ) {
+ $template = $this->templateOverridesByCluster[$cluster] + $template;
+ }
+
+ return $this->newLoadBalancer(
+ $template,
+ $this->externalLoads[$cluster],
+ [],
+ $this->readOnlyReason
+ );
+ }
+
+ /**
+ * @param string $cluster External storage cluster, or false for core
+ * @param DatabaseDomain|string|bool $domain Domain ID, or false for the current domain
+ * @return LoadBalancer
+ */
+ public function getExternalLB( $cluster, $domain = false ) {
+ if ( !isset( $this->extLBs[$cluster] ) ) {
+ $this->extLBs[$cluster] = $this->newExternalLB( $cluster, $domain );
+ $this->getChronologyProtector()->initLB( $this->extLBs[$cluster] );
+ }
+
+ return $this->extLBs[$cluster];
+ }
+
+ /**
+ * Make a new load balancer object based on template and load array
+ *
+ * @param array $template
+ * @param array $loads
+ * @param array $groupLoads
+ * @param string|bool $readOnlyReason
+ * @return LoadBalancer
+ */
+ private function newLoadBalancer( $template, $loads, $groupLoads, $readOnlyReason ) {
+ $lb = new LoadBalancer( array_merge(
+ $this->baseLoadBalancerParams(),
+ [
+ 'servers' => $this->makeServerArray( $template, $loads, $groupLoads ),
+ 'loadMonitor' => $this->loadMonitorClass,
+ 'readOnlyReason' => $readOnlyReason
+ ]
+ ) );
+ $this->initLoadBalancer( $lb );
+
+ return $lb;
+ }
+
+ /**
+ * Make a server array as expected by LoadBalancer::__construct, using a template and load array
+ *
+ * @param array $template
+ * @param array $loads
+ * @param array $groupLoads
+ * @return array
+ */
+ private function makeServerArray( $template, $loads, $groupLoads ) {
+ $servers = [];
+ $master = true;
+ $groupLoadsByServer = $this->reindexGroupLoads( $groupLoads );
+ foreach ( $groupLoadsByServer as $server => $stuff ) {
+ if ( !isset( $loads[$server] ) ) {
+ $loads[$server] = 0;
+ }
+ }
+ foreach ( $loads as $serverName => $load ) {
+ $serverInfo = $template;
+ if ( $master ) {
+ $serverInfo['master'] = true;
+ if ( isset( $this->masterTemplateOverrides ) ) {
+ $serverInfo = $this->masterTemplateOverrides + $serverInfo;
+ }
+ $master = false;
+ } else {
+ $serverInfo['replica'] = true;
+ }
+ if ( isset( $this->templateOverridesByServer[$serverName] ) ) {
+ $serverInfo = $this->templateOverridesByServer[$serverName] + $serverInfo;
+ }
+ if ( isset( $groupLoadsByServer[$serverName] ) ) {
+ $serverInfo['groupLoads'] = $groupLoadsByServer[$serverName];
+ }
+ if ( isset( $this->hostsByName[$serverName] ) ) {
+ $serverInfo['host'] = $this->hostsByName[$serverName];
+ } else {
+ $serverInfo['host'] = $serverName;
+ }
+ $serverInfo['hostName'] = $serverName;
+ $serverInfo['load'] = $load;
+ $serverInfo += [ 'flags' => DBO_DEFAULT ];
+
+ $servers[] = $serverInfo;
+ }
+
+ return $servers;
+ }
+
+ /**
+ * Take a group load array indexed by group then server, and reindex it by server then group
+ * @param array $groupLoads
+ * @return array
+ */
+ private function reindexGroupLoads( $groupLoads ) {
+ $reindexed = [];
+ foreach ( $groupLoads as $group => $loads ) {
+ foreach ( $loads as $server => $load ) {
+ $reindexed[$server][$group] = $load;
+ }
+ }
+
+ return $reindexed;
+ }
+
+ /**
+ * @param DatabaseDomain|string|bool $domain Domain ID, or false for the current domain
+ * @return array [database name, table prefix]
+ */
+ private function getDBNameAndPrefix( $domain = false ) {
+ $domain = ( $domain === false )
+ ? $this->localDomain
+ : DatabaseDomain::newFromId( $domain );
+
+ return [ $domain->getDatabase(), $domain->getTablePrefix() ];
+ }
+
+ /**
+ * Execute a function for each tracked load balancer
+ * The callback is called with the load balancer as the first parameter,
+ * and $params passed as the subsequent parameters.
+ * @param callable $callback
+ * @param array $params
+ */
+ public function forEachLB( $callback, array $params = [] ) {
+ foreach ( $this->mainLBs as $lb ) {
+ call_user_func_array( $callback, array_merge( [ $lb ], $params ) );
+ }
+ foreach ( $this->extLBs as $lb ) {
+ call_user_func_array( $callback, array_merge( [ $lb ], $params ) );
+ }
+ }
+}
dépôts / lhc / web / wiklou.git / commitdiff