添加等待监控

git-svn-id: http://code.alibabatech.com/svn/druid/trunk@654 b9813039-fb51-4c41-a8b9-e21c2acb5095

src/main/java/com/alibaba/druid/pool/DruidDataSource.java

@@ -857,7 +857,12 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
     }
     
     public int getWaitThreadCount() {
-        return lock.getWaitQueueLength(notEmpty);
+        lock.lock();
+        try {
+            return lock.getWaitQueueLength(notEmpty);
+        } finally {
+            lock.unlock();
+        }
     }
     
     public int getLockQueueLength() {