rdbms: make DBMasterPos implement Serializable

[lhc/web/wiklou.git] / includes / libs / rdbms / database / position / MySQLMasterPos.php

diff --git a/includes/libs/rdbms/database/position/MySQLMasterPos.php b/includes/libs/rdbms/database/position/MySQLMasterPos.php
index 2ee9068..cdcb79c 100644 (file)
--- a/includes/libs/rdbms/database/position/MySQLMasterPos.php
+++ b/includes/libs/rdbms/database/position/MySQLMasterPos.php
@@ -3,6 +3,7 @@
 namespace Wikimedia\Rdbms;
 
 use InvalidArgumentException;
+use UnexpectedValueException;
 
 /**
  * DBMasterPos class for MySQL/MariaDB
@@ -27,6 +28,14 @@ class MySQLMasterPos implements DBMasterPos {
         * @param float $asOfTime UNIX timestamp
         */
        public function __construct( $position, $asOfTime ) {
+               $this->init( $position, $asOfTime );
+       }
+
+       /**
+        * @param string $position
+        * @param float $asOfTime
+        */
+       protected function init( $position, $asOfTime ) {
                $m = [];
                if ( preg_match( '!^(.+)\.(\d+)/(\d+)$!', $position, $m ) ) {
                        $this->binlog = $m[1]; // ideally something like host name
@@ -34,7 +43,7 @@ class MySQLMasterPos implements DBMasterPos {
                } else {
                        $gtids = array_filter( array_map( 'trim', explode( ',', $position ) ) );
                        foreach ( $gtids as $gtid ) {
-                               if ( !$this->parseGTID( $gtid ) ) {
+                               if ( !self::parseGTID( $gtid ) ) {
                                        throw new InvalidArgumentException( "Invalid GTID '$gtid'." );
                                }
                                $this->gtids[] = $gtid;
@@ -192,4 +201,17 @@ class MySQLMasterPos implements DBMasterPos {
                        ? [ 'binlog' => $this->binlog, 'pos' => $this->pos ]
                        : false;
        }
+
+       public function serialize() {
+               return serialize( [ 'position' => $this->__toString(), 'asOfTime' => $this->asOfTime ] );
+       }
+
+       public function unserialize( $serialized ) {
+               $data = unserialize( $serialized );
+               if ( !is_array( $data ) ) {
+                       throw new UnexpectedValueException( __METHOD__ . ": cannot unserialize position" );
+               }
+
+               $this->init( $data['position'], $data['asOfTime'] );
+       }
 }