HBASE-28770 Support partial results in AggregateImplementation and As…

…yncAggregationClient (addendum)

This addendum is only for branch-2.6. It is intended to enable binary compatibility for an
existing client that implements its own AsyncTable, when upgrading from 2.6.0 to 2.6.1.

hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncTable.java

@@ -36,6 +36,7 @@
 import org.apache.hadoop.hbase.io.TimeRange;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.yetus.audience.InterfaceAudience;
+import org.slf4j.LoggerFactory;
 
 import org.apache.hbase.thirdparty.com.google.common.base.Preconditions;
 
@@ -792,6 +793,12 @@ <S, R> CoprocessorServiceBuilder<S, R> coprocessorService(Function<RpcChannel, S
  * server does not offer partial results, it is still safe to use this, assuming you implement
  * your {@link PartialResultCoprocessorCallback#getNextCallable(Object, RegionInfo)} correctly.
  */
- <S, R> CoprocessorServiceBuilder<S, R> coprocessorService(Function<RpcChannel, S> stubMaker,
- ServiceCaller<S, R> callable, PartialResultCoprocessorCallback<S, R> callback);
+ default <S, R> CoprocessorServiceBuilder<S, R> coprocessorService(
+ Function<RpcChannel, S> stubMaker, ServiceCaller<S, R> callable,
+ PartialResultCoprocessorCallback<S, R> callback) {
+ LoggerFactory.getLogger(AsyncTable.class).warn(
+ "Calling coprocessorService with default implementation that does not fully implement the"
+ + " PartialResultCoprocessorCallback interface.");
+ return coprocessorService(stubMaker, callable, (CoprocessorCallback<R>) callback);
+ }
 }