forceSwitch support to create null config dataSource

Author: taochen

dal-client/pom.xml

@@ -4,7 +4,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.ctrip.platform</groupId>
     <artifactId>dal-client</artifactId>
-    <version>1.17.6</version>
+    <version>1.17.7</version>
     <properties>
         <ver.version>${project.version}</ver.version>
         <javax-persistence-version>1.0.2</javax-persistence-version>

dal-client/src/main/java/com/ctrip/platform/dal/dao/configure/IDataSourceConfigureProvider.java

@@ -2,7 +2,7 @@
 
 public interface IDataSourceConfigureProvider {
 //    get datasource configure from local cache
-    IDataSourceConfigure getDataSourceConfigure() throws Exception;
+    IDataSourceConfigure getDataSourceConfigure();
 
 //    load datasource configure from configure center
     IDataSourceConfigure forceLoadDataSourceConfigure();

dal-client/src/main/java/com/ctrip/platform/dal/dao/datasource/DataSourceLocator.java

@@ -25,10 +25,17 @@ public class DataSourceLocator {
 
     private DataSourceConfigureProvider provider;
 
+    private boolean isForceSwitch = false;
+
     public DataSourceLocator(DataSourceConfigureProvider provider) {
         this.provider = provider;
     }
 
+    public DataSourceLocator(DataSourceConfigureProvider provider, boolean isForceSwitch) {
+        this.provider = provider;
+        this.isForceSwitch = isForceSwitch;
+    }
+
     // to be refactored
     public static boolean containsKey(String name) {
         return cache.containsKey(name);
@@ -75,7 +82,7 @@ public DataSource getDataSource(String name) throws Exception {
 
     private DataSource createDataSource(String name) throws SQLException {
         IDataSourceConfigure config = provider.getDataSourceConfigure(name);
-        if (config == null) {
+        if (config == null && !isForceSwitch) {
             throw new SQLException("Can not find connection configure for " + name);
         }
 

dal-client/src/test/java/com/ctrip/platform/dal/dao/datasource/ModifyDataSourceConfigureProvider.java

@@ -9,8 +9,8 @@
  */
 public class ModifyDataSourceConfigureProvider implements IDataSourceConfigureProvider {
     @Override
-    public IDataSourceConfigure getDataSourceConfigure() throws Exception {
-        throw new Exception();
+    public IDataSourceConfigure getDataSourceConfigure() {
+        throw new RuntimeException();
     }
 
     @Override