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<?php |
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/** |
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* This class does a full resync of the database by |
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* enqueuing an outbound action for every single object |
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* that we care about. |
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* |
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* This class contains a few non-obvious optimisations that should be explained: |
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* - we fire an action called jetpack_full_sync_start so that WPCOM can erase the contents of the cached database |
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* - for each object type, we obtain a full list of object IDs to sync via a single API call (hoping that since they're ints, they can all fit in RAM) |
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* - we load the full objects for those IDs in chunks of Jetpack_Sync_Full::ARRAY_CHUNK_SIZE (to reduce the number of MySQL calls) |
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* - we fire a trigger for the entire array which the Jetpack_Sync_Sender then serializes and queues. |
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*/ |
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require_once 'class.jetpack-sync-wp-replicastore.php'; |
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class Jetpack_Sync_Module_Full_Sync extends Jetpack_Sync_Module { |
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static $status_option = 'jetpack_full_sync_status'; |
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static $transient_timeout = 3600; // an hour |
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private $sender; |
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public function name() { |
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return 'full-sync'; |
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} |
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function init_listeners( $callable ) { |
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// synthetic actions for full sync |
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add_action( 'jetpack_full_sync_start', $callable ); |
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add_action( 'jetpack_full_sync_end', $callable ); |
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} |
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function init_before_send() { |
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// this is triggered after actions have been processed on the server |
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add_action( 'jetpack_sync_processed_actions', array( $this, 'update_sent_progress_action' ) ); |
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} |
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function start() { |
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if( ! $this->should_start_full_sync() ) { |
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return false; |
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} |
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/** |
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* Fires when a full sync begins. This action is serialized |
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* and sent to the server so that it can clear the replica storage, |
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* and/or reset other data. |
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* |
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* @since 4.2.0 |
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*/ |
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do_action( 'jetpack_full_sync_start' ); |
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$this->set_status_queuing_started(); |
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foreach( Jetpack_Sync_Modules::get_modules() as $module ) { |
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$module->full_sync(); |
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} |
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$this->set_status_queuing_finished(); |
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$store = new Jetpack_Sync_WP_Replicastore(); |
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do_action( 'jetpack_full_sync_end', $store->checksum_all() ); |
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return true; |
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} |
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private function should_start_full_sync() { |
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$status = $this->get_status(); |
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// We should try sync if we haven't started it yet or if we have finished it. |
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if( is_null( $status['started'] ) || is_integer( $status['finished'] ) ) { |
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return true; |
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} |
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return false; |
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} |
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function update_sent_progress_action( $actions ) { |
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// quick way to map to first items with an array of arrays |
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$actions_with_counts = array_count_values( array_map( 'reset', $actions ) ); |
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$status = $this->get_status(); |
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if ( is_null( $status['started'] ) || $status['finished'] ) { |
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return; |
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} |
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if ( isset( $actions_with_counts[ 'jetpack_full_sync_start' ] ) ) { |
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$status['sent_started'] = time(); |
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} |
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foreach( Jetpack_Sync_Modules::get_modules() as $module ) { |
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$module_name = $module->name(); |
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$module_actions = $module->get_full_sync_actions(); |
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foreach( $module_actions as $module_action ) { |
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if ( isset( $actions_with_counts[ $module_action ] ) ) { |
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if ( ! isset( $status[ 'sent' ][ $module_name ] ) ) { |
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$status['sent'][ $module_name ] = 0; |
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} |
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$status['sent'][ $module_name ] += $actions_with_counts[ $module_action ]; |
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} |
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} |
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} |
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if ( isset( $actions_with_counts[ 'jetpack_full_sync_end' ] ) ) { |
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$status['finished'] = time(); |
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} |
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$this->update_status( $status ); |
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} |
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private function set_status_queuing_started() { |
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$status = $this->initial_status; |
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$status[ 'started' ] = time(); |
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$this->update_status( $status ); |
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} |
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private function set_status_queuing_finished() { |
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$this->update_status( array( 'queue_finished' => time() ) ); |
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} |
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private $initial_status = array( |
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'started' => null, |
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'queue_finished' => null, |
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'sent_started' => null, |
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'finished' => null, |
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'sent' => array(), |
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'queue' => array(), |
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); |
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public function get_status() { |
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return get_option( self::$status_option, $this->initial_status ); |
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} |
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public function update_status( $status ) { |
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return update_option( |
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self::$status_option, |
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array_merge( $this->get_status(), $status ) |
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); |
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} |
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private function clear_status() { |
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delete_option( self::$status_option ); |
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} |
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} |
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Automattic /
jetpack
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The PSR-2 coding standard requires that all properties in a class have their visibility explicitly declared. If you declare a property using
the property is implicitly global.
To learn more about the PSR-2, please see the PHP-FIG site on the PSR-2.