parent::__construct();
$this->mDescription = "Send SQL queries to a MediaWiki database";
$this->addOption( 'cluster', 'Use an external cluster by name', false, true );
+ $this->addOption( 'slave', 'Use a slave server (either "any" or by name)', false, true );
}
public function execute() {
- // Get a DB handle (with this wiki's DB select) from the appropriate load balancer
+ // Get the appropriate load balancer (for this wiki)
if ( $this->hasOption( 'cluster' ) ) {
$lb = wfGetLBFactory()->getExternalLB( $this->getOption( 'cluster' ) );
- $dbw = $lb->getConnection( DB_MASTER ); // master for external LB
} else {
- $dbw = wfGetDB( DB_MASTER ); // master for primary LB for this wiki
+ $lb = wfGetLB();
}
+ // Figure out which server to use
+ if ( $this->hasOption( 'slave' ) ) {
+ $server = $this->getOption( 'slave' );
+ if ( $server === 'any' ) {
+ $index = DB_SLAVE;
+ } else {
+ $index = null;
+ for ( $i = 0; $i < $lb->getServerCount(); ++$i ) {
+ if ( $lb->getServerName( $i ) === $server ) {
+ $index = $i;
+ break;
+ }
+ }
+ if ( $index === null ) {
+ $this->error( "No slave server configured with the name '$server'.", 1 );
+ }
+ }
+ } else {
+ $index = DB_MASTER;
+ }
+ // Get a DB handle (with this wiki's DB selected) from the appropriate load balancer
+ $dbw = $lb->getConnection( $index );
+ if ( $this->hasOption( 'slave' ) && $dbw->getLBInfo( 'master' ) !== null ) {
+ $this->error( "The server selected ({$dbw->getServer()}) is not a slave.", 1 );
+ }
+
if ( $this->hasArg( 0 ) ) {
$file = fopen( $this->getArg( 0 ), 'r' );
if ( !$file ) {