From 3d167a359d5043e5ade2ac2388b19d0aca1f7af4 Mon Sep 17 00:00:00 2001
From: wenshao <szujobs@hotmail.com>
Date: Wed, 29 Jun 2011 09:20:40 +0000
Subject: [PATCH] =?UTF-8?q?=E4=BB=A3=E7=A0=81=E9=87=8D=E6=9E=84?=
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git-svn-id: http://code.alibabatech.com/svn/druid/trunk@311 b9813039-fb51-4c41-a8b9-e21c2acb5095
---
 .../vendor/MySqlValidConnectionChecker.java   | 26 +++++++++----------
 1 file changed, 12 insertions(+), 14 deletions(-)

diff --git a/src/main/java/com/alibaba/druid/pool/vendor/MySqlValidConnectionChecker.java b/src/main/java/com/alibaba/druid/pool/vendor/MySqlValidConnectionChecker.java
index 3bbda732ea..62752d3095 100644
--- a/src/main/java/com/alibaba/druid/pool/vendor/MySqlValidConnectionChecker.java
+++ b/src/main/java/com/alibaba/druid/pool/vendor/MySqlValidConnectionChecker.java
@@ -10,6 +10,7 @@ import java.sql.Statement;
 import com.alibaba.druid.logging.Log;
 import com.alibaba.druid.logging.LogFactory;
 import com.alibaba.druid.pool.ValidConnectionChecker;
+import com.alibaba.druid.util.DruidLoaderUtils;
 import com.alibaba.druid.util.JdbcUtils;
 
 public class MySqlValidConnectionChecker implements ValidConnectionChecker, Serializable {
@@ -21,13 +22,10 @@ public class MySqlValidConnectionChecker implements ValidConnectionChecker, Seri
     private Method            ping;
     private boolean           driverHasPingMethod = false;
 
-    // The timeout (apparently the timeout is ignored?)
-    private static Object[]   params              = new Object[] {};
-
     public MySqlValidConnectionChecker(){
         try {
-            clazz = Thread.currentThread().getContextClassLoader().loadClass("com.mysql.jdbc.Connection");
-            ping = clazz.getMethod("ping", new Class[] {});
+            clazz = DruidLoaderUtils.loadClass("com.mysql.jdbc.Connection");
+            ping = clazz.getMethod("ping");
             if (ping != null) {
                 driverHasPingMethod = true;
             }
@@ -39,18 +37,18 @@ public class MySqlValidConnectionChecker implements ValidConnectionChecker, Seri
     public boolean isValidConnection(Connection c) {
         try {
             Connection conn = (Connection) c.unwrap(clazz);
-           if (conn != null) {
-               c = conn;
-           }
-       } catch (SQLException e) {
-           LOG.warn("Unexpected error in ping", e);
-           return false;
-       }
-       
+            if (conn != null) {
+                c = conn;
+            }
+        } catch (SQLException e) {
+            LOG.warn("Unexpected error in ping", e);
+            return false;
+        }
+
         // if there is a ping method then use it, otherwise just use a 'SELECT 1' statement
         if (driverHasPingMethod) {
             try {
-                ping.invoke(c, params);
+                ping.invoke(c);
                 return true;
             } catch (Exception e) {
                 LOG.warn("Unexpected error in ping", e);