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extend/app_alipay/lotusphp_runtime/Cache/CacheConnectionManager.php

@@ -0,0 +1,52 @@
+<?php
+class LtCacheConnectionManager
+{
+	public $configHandle;
+	protected $connectionAdapter;
+
+	public function getConnection($group, $node, $role)
+	{
+		if ($connection = $this->getNewConnection($group, $node, $role))
+		{
+			return array(
+				"connectionAdapter" => $this->connectionAdapter,
+				"connectionResource" => $connection
+			);
+		}
+		else
+		{
+			trigger_error("no cache server can be connected");
+			return false;
+		}
+	}
+
+	protected function getNewConnection($group, $node, $role)
+	{
+		$servers = $this->configHandle->get("cache.servers");
+		$hostTotal = count($servers[$group][$node][$role]);
+		$hostIndexArray = array_keys($servers[$group][$node][$role]);
+		while ($hostTotal)
+		{
+			$hashNumber = substr(microtime(),7,1) % $hostTotal;
+			$hostConfig = $servers[$group][$node][$role][$hostIndexArray[$hashNumber]];
+			$cacheFactory = new LtCacheAdapterFactory;
+			$this->connectionAdapter = $cacheFactory->getConnectionAdapter($hostConfig["adapter"]);
+			if ($connection = $this->connectionAdapter->connect($hostConfig))
+			{
+				return $connection;
+			}
+			else
+			{
+				//trigger_error('connection fail', E_USER_WARNING);
+				//delete the unavailable server
+				for ($i = $hashNumber; $i < $hostTotal - 1; $i ++)
+				{
+					$hostIndexArray[$i] = $hostIndexArray[$i+1];
+				}
+				unset($hostIndexArray[$hostTotal-1]);
+				$hostTotal --;
+			}//end else
+		}//end while
+		return false;
+	}
+}