添加错误次数监控

git-svn-id: http://code.alibabatech.com/svn/druid/trunk@905 b9813039-fb51-4c41-a8b9-e21c2acb5095

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

@@ -139,6 +139,7 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
             lock.unlock();
         }
 
+        errorCount.set(0);
         commitCount.set(0);
         rollbackCount.set(0);
         startTransactionCount.set(0);
@@ -1089,6 +1090,10 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
             lock.unlock();
         }
     }
+    
+    public long getErrorCount() {
+        return this.errorCount.get();
+    }
 
     public String toString() {
         StringBuilder buf = new StringBuilder();

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

@@ -68,4 +68,6 @@ public interface DruidDataSourceMBean extends DruidAbstractDataSourceMBean {
     Date getActivePeakTime();
     
     Date getPoolingPeakTime();
+    
+    long getErrorCount();
 }