MigrateMessage example

  public function __construct(array $configuration, $plugin_id, $plugin_definition, MigrationInterface $migration, EventDispatcherInterface $event_dispatcher, MigrationPluginManagerInterface $migration_plugin_manager = NULL) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
    $this->migration = $migration;
    $this->eventDispatcher = $event_dispatcher;
    $this->message = new MigrateMessage();

    if (!isset($this->database)) {
      $this->database = \Drupal::database();
    }

    // Default generated table names, limited to 63 characters.     $machine_name = str_replace(':', '__', $this->migration->id());
    $prefix_length = strlen($this->database->getPrefix());
    $this->mapTableName = 'migrate_map_' . mb_strtolower($machine_name);
    $this->mapTableName = mb_substr($this->mapTableName, 0, 63 - $prefix_length);
    $this->messageTableName = 'migrate_message_' . mb_strtolower($machine_name);
    

  public function __construct(MigrationInterface $migration, MigrateMessageInterface $message = NULL, EventDispatcherInterface $event_dispatcher = NULL) {
    $this->migration = $migration;
    $this->message = $message ?: new MigrateMessage();
    $this->getIdMap()->setMessage($this->message);
    $this->eventDispatcher = $event_dispatcher;
    // Record the memory limit in bytes     $limit = trim(ini_get('memory_limit'));
    if ($limit == '-1') {
      $this->memoryLimit = PHP_INT_MAX;
    }
    else {
      $this->memoryLimit = Bytes::toNumber($limit);
    }
  }