ha

src/main/java/com/alibaba/druid/pool/ha/DataSourceHolder.java

@@ -22,6 +22,16 @@ public class DataSourceHolder implements Closeable {
 
     private transient int         weightRegionEnd;
 
+    private boolean               writable          = true;
+
+    public boolean isWritable() {
+        return writable;
+    }
+
+    public void setWritable(boolean writable) {
+        this.writable = writable;
+    }
+
     public int getWeightRegionBegin() {
         return weightRegionBegin;
     }
@@ -93,7 +103,7 @@ public class DataSourceHolder implements Closeable {
         connectCount.incrementAndGet();
         try {
             Connection conn = dataSource.getConnection();
-            
+
             return new MultiConnectionHolder(this, conn);
         } catch (SQLException ex) {
             connectErrorCount.incrementAndGet();

src/main/java/com/alibaba/druid/pool/ha/HADataSource.java

@@ -24,6 +24,14 @@ public class HADataSource extends MultiDataSource implements HADataSourceMBean,
         master.resetState();
         slave.resetState();
     }
+    
+    public boolean isMasterWritable() {
+        return master != null && master.isWritable();
+    }
+    
+    public boolean isSlaveWritable() {
+        return slave != null && slave.isWritable();
+    }
 
     public long getMasterConnectCount() {
         return master.getConnectCount();
@@ -45,8 +53,10 @@ public class HADataSource extends MultiDataSource implements HADataSourceMBean,
         this.restartDataSource("slave");
     }
 
-    public void setMaster(DruidDataSource master) {
-        this.setMaster(new DataSourceHolder(master));
+    public DataSourceHolder setMaster(DruidDataSource master) {
+        DataSourceHolder holder = new DataSourceHolder(master);
+        this.setMaster(holder);
+        return holder;
     }
 
     public void setMaster(DataSourceHolder master) {
@@ -58,8 +68,10 @@ public class HADataSource extends MultiDataSource implements HADataSourceMBean,
         return slave;
     }
 
-    public void setSlave(DruidDataSource slave) {
-        this.setSlave(new DataSourceHolder(slave));
+    public DataSourceHolder setSlave(DruidDataSource slave) {
+        DataSourceHolder holder = new DataSourceHolder(slave);
+        this.setSlave(holder);
+        return holder;
     }
 
     public void setSlave(DataSourceHolder slave) {

src/main/java/com/alibaba/druid/pool/ha/config/HAConfigLoader.java

@@ -0,0 +1,22 @@
+package com.alibaba.druid.pool.ha.config;
+
+import java.net.URL;
+import java.sql.SQLException;
+
+import com.alibaba.fastjson.JSON;
+import com.alibaba.fastjson.JSONObject;
+
+
+public class HAConfigLoader extends URLConnectionConfigLoader {
+
+    public HAConfigLoader(URL configServerURL){
+        super(configServerURL);
+    }
+
+    @Override
+    protected void handleResponseMessage() throws SQLException {
+        JSONObject json = JSON.parseObject(this.getResponseMessage());
+        json.get("serverList");
+    }
+
+}