public static function getInstance()

in consumer/proxy/ProxyFactory.php [178:240]
52 lines of code
8 McCabe index (conditional complexity)

    public static function getInstance($consumerInterface, $ioTimeOut = 3, $version = null, $group = null)
    {
    	$ret = NULL;
        $route = '';
        $addressList = 'null';

		//app级组和版本信息
		$group = self::$appGroup;
		$versionList = self::$appVersion;

		if (array_key_exists($consumerInterface, self::$serviceConsumers))
		{
            $serviceProperty = self::$serviceConsumers[$consumerInterface];
			if(isset($serviceProperty['group']))
			{
				$group = $serviceProperty['group'];
			}
			if(isset($serviceProperty['version']))
			{
				$versionList = $serviceProperty['version'];
			}
		}

		try
		{

			//依据配置权重选取版本号
			$version = FSOFCommonUtil::getVersionByWeight($versionList);

			//p2p模式
			if (self::$p2pMode)
			{
				$ret = self::getInstanceByP2P($consumerInterface, $ioTimeOut, $version, $group);
				$route = 'p2p';
			}

			if (empty($ret))
			{
				//registry 模式
				$ret = self::getInstancByRedis($consumerInterface, $ioTimeOut, $version, $group);
				$route = 'auto registry';
			}

			if (empty($ret))
			{
				$errMsg = "current_address:".FSOFSystemUtil::getLocalIP()."|".$consumerInterface;
                throw new ConsumerException($errMsg);
			}
			else
			{
                $addressList = $ret->getAddressStr();
			}
            self::$logger->debug('consumer_app:'.self::$appName.'|app_config_file:'.self::$appConfigFile.
                '|version:'.$version.'|group:'.$group.'|provider_service:'.$consumerInterface.'|route:'.$route.'|addr_list:'.$addressList.'|timeout:'.$ioTimeOut);
        }
        catch (\Exception $e)
        {
            self::$logger->error('consumer_app:'.self::$appName.'|app_config_file:'.self::$appConfigFile.
                '|version:'.$version.'|group:'.$group.'|provider_service:'.$consumerInterface.'|errmsg:'. $e->getMessage().'|exceptionmsg:'.$e);
            throw new ConsumerException($e->getMessage(), $e);
        }
    	return $ret;
    }