Jackie-Jiang commented on code in PR #13195:
URL: https://github.com/apache/pinot/pull/13195#discussion_r1614054911


##########
pinot-broker/src/main/java/org/apache/pinot/broker/api/AccessControl.java:
##########
@@ -42,21 +46,58 @@ default boolean hasAccess(RequesterIdentity 
requesterIdentity) {
 
   /**
    * Fine-grained access control on parsed broker request. May check table, 
column, permissions, etc.
-   *
+   * The default implementation is kept to have backward compatibility with 
the existing implementations
    * @param requesterIdentity requester identity
    * @param brokerRequest broker request (incl query)
    *
    * @return {@code true} if authorized, {@code false} otherwise
    */
-  boolean hasAccess(RequesterIdentity requesterIdentity, BrokerRequest 
brokerRequest);
+
+  default boolean hasAccess(RequesterIdentity requesterIdentity, BrokerRequest 
brokerRequest) {
+    return true;

Review Comment:
   I just realized that `BasicAuthAccessControlFactory` and 
`ZkBasicAuthAccessControlFactory` override both the methods, thus the problem I 
described won't happen.
   I like the idea of making the default `hasAccess()` throw 
`UnsupportedOperationException` (we usually use this to represent unimplemented 
method) which can force caller to switch to the new API if there are any. In 
that case we might also want to remove the override in 
`BasicAuthAccessControlFactory` and `ZkBasicAuthAccessControlFactory`



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