extend/alidayu/top/ClusterTopClient.php

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<?php
class ClusterTopClient extends TopClient {

	private static $dnsconfig;
	private static $syncDate = 0;
	private static $applicationVar ;
	private static $cfgDuration = 10;

	public function __construct($appkey = "",$secretKey = ""){
		ClusterTopClient::$applicationVar = new ApplicationVar;
		$this->appkey = $appkey;
		$this->secretKey = $secretKey ;
		$saveConfig = ClusterTopClient::$applicationVar->getValue();

		if($saveConfig){
			$tmpConfig = $saveConfig['dnsconfig'];
			ClusterTopClient::$dnsconfig = $this->object_to_array($tmpConfig);
			unset($tmpConfig);

			ClusterTopClient::$syncDate = $saveConfig['syncDate'];
			if(!ClusterTopClient::$syncDate)
				ClusterTopClient::$syncDate = 0;
		}
	}

	public function __destruct(){
		if(ClusterTopClient::$dnsconfig && ClusterTopClient::$syncDate){
			ClusterTopClient::$applicationVar->setValue("dnsconfig",ClusterTopClient::$dnsconfig);
			ClusterTopClient::$applicationVar->setValue("syncDate",ClusterTopClient::$syncDate);
			ClusterTopClient::$applicationVar->write();
		}
	}

	public function execute($request = null, $session = null,$bestUrl = null){
		$currentDate = date('U');
		$syncDuration = $this->getDnsConfigSyncDuration();
		$bestUrl = $this->getBestVipUrl($this->gatewayUrl,$request->getApiMethodName(),$session);
		if($currentDate - ClusterTopClient::$syncDate > $syncDuration * 60){
			$httpdns = new HttpdnsGetRequest;
			ClusterTopClient::$dnsconfig = json_decode(parent::execute($httpdns,null,$bestUrl)->result,true);
			$syncDate = date('U');
			ClusterTopClient::$syncDate = $syncDate ;
		}
		return parent::execute($request,$session,$bestUrl);
	}

	private function getDnsConfigSyncDuration(){
		if(ClusterTopClient::$cfgDuration){
			return ClusterTopClient::$cfgDuration;
		}
		if(!ClusterTopClient::$dnsconfig){
			return ClusterTopClient::$cfgDuration;
		}
		$config = json_encode(ClusterTopClient::$dnsconfig);
		if(!$config){
			return ClusterTopClient::$cfgDuration;
		}
		$config = ClusterTopClient::$dnsconfig['config'];
		$duration = $config['interval'];
		ClusterTopClient::$cfgDuration = $duration;