diff --git a/src/main/java/com/alibaba/druid/pool/ha/HADataSource.java b/src/main/java/com/alibaba/druid/pool/ha/HADataSource.java
index a3d3d23818..a4f166ab95 100644
--- a/src/main/java/com/alibaba/druid/pool/ha/HADataSource.java
+++ b/src/main/java/com/alibaba/druid/pool/ha/HADataSource.java
@@ -54,10 +54,7 @@ public class HADataSource extends MultiDataSource implements DataSource {
             assert dataSource != null;
 
             if (!dataSource.isEnable()) {
-                boolean removed = dataSources.remove(dataSource);
-                if (removed) {
-                    notAvailableDatasources.add(dataSource);
-                }
+                handleNotAwailableDatasource(dataSource);
                 continue;
             }
 
@@ -79,6 +76,13 @@ public class HADataSource extends MultiDataSource implements DataSource {
             return conn;
         }
     }
+    
+    void handleNotAwailableDatasource(DruidDataSource dataSource) {
+        boolean removed = dataSources.remove(dataSource);
+        if (removed) {
+            notAvailableDatasources.add(dataSource);
+        }
+    }
 
     public long getIndexErrorCount() {
         return indexErrorCount.get();
diff --git a/src/main/java/com/alibaba/druid/pool/ha/MultiDataSource.java b/src/main/java/com/alibaba/druid/pool/ha/MultiDataSource.java
index 58904e272d..10ab7c6144 100644
--- a/src/main/java/com/alibaba/druid/pool/ha/MultiDataSource.java
+++ b/src/main/java/com/alibaba/druid/pool/ha/MultiDataSource.java
@@ -3,6 +3,8 @@ package com.alibaba.druid.pool.ha;
 import java.sql.Connection;
 import java.sql.SQLException;
 import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
 
 import com.alibaba.druid.pool.DataSourceAdapter;
 import com.alibaba.druid.pool.DruidDataSource;
@@ -15,8 +17,14 @@ public abstract class MultiDataSource extends DataSourceAdapter {
         dataSources = new ArrayList<DruidDataSource>();
     }
 
-    @Override
-    public Connection getConnection() throws SQLException {
-        throw new UnsupportedOperationException();
+    public List<DruidDataSource> getDataSources() {
+        return Collections.unmodifiableList(dataSources);
     }
+
+    public void setDataSources(List<DruidDataSource> dataSources) {
+        this.dataSources = new ArrayList<DruidDataSource>(dataSources);;
+    }
+
+    @Override
+    public abstract Connection getConnection() throws SQLException;
 }