RaigorJiang commented on a change in pull request #15415:
URL: https://github.com/apache/shardingsphere/pull/15415#discussion_r806707736
##########
File path:
shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/text/distsql/ral/RALBackendHandlerFactory.java
##########
@@ -50,18 +70,39 @@
* @throws SQLException SQL exception
*/
public static TextProtocolBackendHandler newInstance(final DatabaseType
databaseType, final RALStatement sqlStatement, final ConnectionSession
connectionSession) throws SQLException {
+ TextProtocolBackendHandler result = null;
if (sqlStatement instanceof QueryableRALStatement) {
- return
QueryableRALBackendHandlerFactory.newInstance((QueryableRALStatement)
sqlStatement, connectionSession);
+ result =
ScalingQueryableRALBackendHandlerFactory.newInstance((QueryableRALStatement)
sqlStatement, connectionSession);
}
if (sqlStatement instanceof UpdatableRALStatement) {
- return
UpdatableRALBackendHandlerFactory.newInstance((UpdatableRALStatement)
sqlStatement);
+ result =
ScalingUpdatableRALBackendHandlerFactory.newInstance((UpdatableRALStatement)
sqlStatement);
}
if (sqlStatement instanceof CommonDistSQLStatement) {
- return
CommonDistSQLBackendHandlerFactory.newInstance((CommonDistSQLStatement)
sqlStatement, connectionSession);
+ result =
CommonDistSQLBackendHandlerFactory.newInstance((CommonDistSQLStatement)
sqlStatement, connectionSession);
}
if (sqlStatement instanceof AdvancedDistSQLStatement) {
- return
AdvancedDistSQLBackendHandlerFactory.newInstance(databaseType,
(AdvancedDistSQLStatement) sqlStatement, connectionSession);
+ result =
AdvancedDistSQLBackendHandlerFactory.newInstance(databaseType,
(AdvancedDistSQLStatement) sqlStatement, connectionSession);
+ }
+ if (result == null) {
+ HandlerParameter parameter = new
HandlerParameter().setStatement(sqlStatement).setConnectionSession(connectionSession).setDatabaseType(databaseType);
+ result = getHandler(sqlStatement, parameter);
+ }
+ return result;
+ }
+
+ private static RALBackendHandler newInstance(final Class<? extends
RALBackendHandler> clazz) {
+ try {
+ return clazz.newInstance();
+ } catch (final InstantiationException | IllegalAccessException ex) {
+ throw new UnsupportedOperationException(String.format("Can not
find public constructor for class `%s`", clazz.getName()));
+ }
+ }
+
+ private static RALBackendHandler getHandler(final RALStatement
sqlStatement, final HandlerParameter<RALStatement> parameter) {
+ Class<? extends RALBackendHandler> clz =
handlerClz.get(sqlStatement.getClass().getName());
+ if (null == clz) {
Review comment:
`clazz` may be a more common name
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
