rdbms: move "maxLag" parameter up to LBFactory and add comments

[lhc/web/wiklou.git] / includes / libs / rdbms / lbfactory / LBFactory.php

diff --git a/includes/libs/rdbms/lbfactory/LBFactory.php b/includes/libs/rdbms/lbfactory/LBFactory.php
index 9a6c224..9ec1ce1 100644 (file)
--- a/includes/libs/rdbms/lbfactory/LBFactory.php
+++ b/includes/libs/rdbms/lbfactory/LBFactory.php
@@ -95,6 +95,9 @@ abstract class LBFactory implements ILBFactory {
        /** @var string|null */
        private $defaultGroup = null;
 
+       /** @var int|null */
+       protected $maxLag;
+
        const ROUND_CURSORY = 'cursory';
        const ROUND_BEGINNING = 'within-begin';
        const ROUND_COMMITTING = 'within-commit';
@@ -110,6 +113,7 @@ abstract class LBFactory implements ILBFactory {
                        ? DatabaseDomain::newFromId( $conf['localDomain'] )
                        : DatabaseDomain::newUnspecified();
 
+               $this->maxLag = $conf['maxLag'] ?? null;
                if ( isset( $conf['readOnlyReason'] ) && is_string( $conf['readOnlyReason'] ) ) {
                        $this->readOnlyReason = $conf['readOnlyReason'];
                }
@@ -588,6 +592,7 @@ abstract class LBFactory implements ILBFactory {
                        'hostname' => $this->hostname,
                        'cliMode' => $this->cliMode,
                        'agent' => $this->agent,
+                       'maxLag' => $this->maxLag,
                        'defaultGroup' => $this->defaultGroup,
                        'chronologyCallback' => function ( ILoadBalancer $lb ) {
                                // Defer ChronologyProtector construction in case setRequestInfo() ends up