Scalr_Db_Msr_Info::init PHP Méthode

    public static function init(DBFarmRole $dbFarmRole, DBServer $dbServer, $dbType)
    {
        switch ($dbType) {
            /*
            case Scalr_Db_Msr::DB_TYPE_MYSQL:
                return new Scalr_Db_Msr_Mysql_Info($dbFarmRole, $dbServer);
                break;
            */
            case Scalr_Db_Msr::DB_TYPE_PERCONA:
            case Scalr_Db_Msr::DB_TYPE_MARIADB:
            case Scalr_Db_Msr::DB_TYPE_MYSQL2:
                return new Scalr_Db_Msr_Mysql2_Info($dbFarmRole, $dbServer, $dbType);
                break;
            case Scalr_Db_Msr::DB_TYPE_POSTGRESQL:
                return new Scalr_Db_Msr_Postgresql_Info($dbFarmRole, $dbServer);
                break;
            case Scalr_Db_Msr::DB_TYPE_REDIS:
                return new Scalr_Db_Msr_Redis_Info($dbFarmRole, $dbServer);
                break;
            default:
                throw new Exception("{$dbType} not supported by DbMsr system");
                break;
        }
    }

 public function ListFarmRoleParamsJson()
 {
     $farmRoleId = $this->GetArg("farm-role-id");
     if (!$farmRoleId) {
         throw new Exception("'farm-role-id' required");
     }
     $dbFarmRole = DBFarmRole::LoadByID($farmRoleId);
     if ($dbFarmRole->FarmID != $this->DBServer->farmId) {
         throw new Exception("You can request this information ONLY for roles within server farm");
     }
     $result = new stdClass();
     // Base configuration
     if ($this->DBServer->farmRoleId == $farmRoleId) {
         $data = Scalr_Role_Behavior::loadByName(ROLE_BEHAVIORS::BASE)->getBaseConfiguration($this->DBServer);
         foreach ((array) $data as $k => $v) {
             $result->{$k} = $v;
         }
     }
     $role = $dbFarmRole->GetRoleObject();
     $behaviors = $role->getBehaviors();
     foreach ($behaviors as $behavior) {
         $data = null;
         if ($behavior == ROLE_BEHAVIORS::MONGODB || $behavior == ROLE_BEHAVIORS::CHEF || $behavior == ROLE_BEHAVIORS::HAPROXY || $behavior == ROLE_BEHAVIORS::NGINX || $behavior == ROLE_BEHAVIORS::RABBITMQ || $behavior == ROLE_BEHAVIORS::APACHE || $behavior == ROLE_BEHAVIORS::VPC_ROUTER) {
             $data = Scalr_Role_Behavior::loadByName($behavior)->getConfiguration($this->DBServer);
         }
         if ($data === null) {
             if ($behavior == ROLE_BEHAVIORS::MYSQL) {
                 $data = new stdClass();
                 $data->logFile = $dbFarmRole->GetSetting(DBFarmRole::SETTING_MYSQL_LOG_FILE);
                 $data->logPos = $dbFarmRole->GetSetting(DBFarmRole::SETTING_MYSQL_LOG_POS);
                 $data->rootPassword = $dbFarmRole->GetSetting(DBFarmRole::SETTING_MYSQL_ROOT_PASSWORD);
                 $data->replPassword = $dbFarmRole->GetSetting(DBFarmRole::SETTING_MYSQL_REPL_PASSWORD);
                 $data->statPassword = $dbFarmRole->GetSetting(DBFarmRole::SETTING_MYSQL_STAT_PASSWORD);
                 $data->replicationMaster = (int) $this->DBServer->GetProperty(SERVER_PROPERTIES::DB_MYSQL_MASTER);
             } else {
                 try {
                     $dbMsrInfo = Scalr_Db_Msr_Info::init($dbFarmRole, $this->DBServer, $behavior);
                     $data = $dbMsrInfo->getMessageProperties();
                 } catch (Exception $e) {
                 }
             }
         }
         if ($data) {
             $result->{$behavior} = $data;
         }
     }
     return $result;
 }