DBServer::getServerHistory PHP Method

    public function getServerHistory()
    {
        $bSave = false;
        $mapping = ['envId' => 'envId', 'farmId' => 'farmId', 'farmRoleId' => 'farmRoleId', 'serverIndex' => 'index', 'cloudLocation' => 'cloudLocation'];
        if (!isset($this->serverHistory)) {
            $entity = Entity\Server\History::findPk($this->serverId);
            if (!$entity) {
                $this->serverHistory = new Entity\Server\History();
                $this->serverHistory->clientId = $this->clientId;
                $this->serverHistory->serverId = $this->serverId;
                $this->serverHistory->platform = $this->platform;
                $this->serverHistory->cloudLocation = $this->cloudLocation;
                $this->serverHistory->instanceTypeName = $this->instanceTypeName;
                $this->serverHistory->roleId = $this->GetProperty(SERVER_PROPERTIES::ROLE_ID);
                $this->serverHistory->farmCreatedById = $this->GetProperty(SERVER_PROPERTIES::FARM_CREATED_BY_ID);
                $this->serverHistory->osType = $this->osType;
                $this->serverHistory->type = $this->type;
                $bSave = true;
            } else {
                $this->serverHistory = $entity;
            }
            if ($this->GetEnvironmentObject()->analytics->enabled) {
                $this->serverHistory->projectId = $this->GetProperty(SERVER_PROPERTIES::FARM_PROJECT_ID);
                $this->serverHistory->ccId = $this->GetProperty(SERVER_PROPERTIES::ENV_CC_ID);
                $bSave = true;
            }
        }
        foreach ($mapping as $prop => $key) {
            if ($this->serverHistory->{$prop} != $this->{$key}) {
                $this->serverHistory->{$prop} = $this->{$key};
                $bSave = true;
            }
        }
        if (!empty($bSave)) {
            $this->serverHistory->save();
        }
        return $this->serverHistory;
    }

 public function __construct(DBServer $DBServer, $reasonId = 0, $reasonMsg = "")
 {
     parent::__construct();
     $this->DBServer = $DBServer;
     try {
         $history = $this->DBServer->getServerHistory();
         $this->launchReasonId = $history->launchReasonId;
         $this->launchReason = $history->launchReason;
     } catch (Exception $e) {
     }
 }