[GitHub] [hbase] Apache9 commented on a change in pull request #1991: HBASE-24650 Change the return types of the new CheckAndMutate methods…

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Apache9 commented on a change in pull request #1991:
URL: https://github.com/apache/hbase/pull/1991#discussion_r446586775



##########
File path: hbase-client/src/main/java/org/apache/hadoop/hbase/client/CheckAndMutateResult.java
##########
@@ -0,0 +1,50 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.hbase.client;
+
+import org.apache.yetus.audience.InterfaceAudience;
+import org.apache.yetus.audience.InterfaceStability;
+
+/**
+ * Represents a result of a CheckAndMutate operation
+ */
+@InterfaceAudience.Public
+@InterfaceStability.Evolving

Review comment:
       For IA.Public, we do not use the IS annotation since it should always be Stable.

##########
File path: hbase-client/src/main/java/org/apache/hadoop/hbase/client/RawAsyncTableImpl.java
##########
@@ -431,49 +431,49 @@ public CheckAndMutateWithFilterBuilder checkAndMutate(byte[] row, Filter filter)
       if (mutation instanceof Put) {
         validatePut((Put) mutation, conn.connConf.getMaxKeyValueSize());
       }
-      return RawAsyncTableImpl.this.<Boolean> newCaller(checkAndMutate.getRow(),
+      return RawAsyncTableImpl.this.<CheckAndMutateResult> newCaller(checkAndMutate.getRow(),
         mutation.getPriority(), rpcTimeoutNs)
         .action((controller, loc, stub) -> RawAsyncTableImpl.mutate(controller,
           loc, stub, mutation,
           (rn, m) -> RequestConverter.buildMutateRequest(rn, checkAndMutate.getRow(),
             checkAndMutate.getFamily(), checkAndMutate.getQualifier(),
             checkAndMutate.getCompareOp(), checkAndMutate.getValue(), checkAndMutate.getFilter(),
             checkAndMutate.getTimeRange(), m),
-          (c, r) -> r.getProcessed()))
+          (c, r) -> ResponseConverter.getCheckAndMutateResult(r)))
         .call();
     } else if (checkAndMutate.getAction() instanceof RowMutations) {
       RowMutations rowMutations = (RowMutations) checkAndMutate.getAction();
-      return RawAsyncTableImpl.this.<Boolean> newCaller(checkAndMutate.getRow(),
+      return RawAsyncTableImpl.this.<CheckAndMutateResult> newCaller(checkAndMutate.getRow(),
         rowMutations.getMaxPriority(), rpcTimeoutNs)
         .action((controller, loc, stub) -> RawAsyncTableImpl.this.mutateRow(controller,
           loc, stub, rowMutations,
           (rn, rm) -> RequestConverter.buildMutateRequest(rn, checkAndMutate.getRow(),
             checkAndMutate.getFamily(), checkAndMutate.getQualifier(),
             checkAndMutate.getCompareOp(), checkAndMutate.getValue(), checkAndMutate.getFilter(),
             checkAndMutate.getTimeRange(), rm),
-          resp -> resp.getExists()))
+          resp -> (CheckAndMutateResult) resp))
         .call();
     } else {
-      CompletableFuture<Boolean> future = new CompletableFuture<>();
+      CompletableFuture<CheckAndMutateResult> future = new CompletableFuture<>();
       future.completeExceptionally(new DoNotRetryIOException(
         "CheckAndMutate doesn't support " + checkAndMutate.getAction().getClass().getName()));
       return future;
     }
   }
 
   @Override
-  public List<CompletableFuture<Boolean>> checkAndMutate(List<CheckAndMutate> checkAndMutates) {
+  public List<CompletableFuture<CheckAndMutateResult>> checkAndMutate(
+    List<CheckAndMutate> checkAndMutates) {
     return batch(checkAndMutates, rpcTimeoutNs).stream()
-      .map(f -> f.thenApply(r -> ((Result)r).getExists()))
-      .collect(toList());
+      .map(f -> f.thenApply(r -> (CheckAndMutateResult) r)).collect(toList());
   }
 
   // We need the MultiRequest when constructing the org.apache.hadoop.hbase.client.MultiResponse,
   // so here I write a new method as I do not want to change the abstraction of call method.
   private <RESP> CompletableFuture<RESP> mutateRow(HBaseRpcController controller,
       HRegionLocation loc, ClientService.Interface stub, RowMutations mutation,
       Converter<MultiRequest, byte[], RowMutations> reqConvert,
-      Function<Result, RESP> respConverter) {
+      Function<Object, RESP> respConverter) {

Review comment:
       Object is too generic. Please explain why we need to do this change?

##########
File path: hbase-client/src/main/java/org/apache/hadoop/hbase/client/RawAsyncTableImpl.java
##########
@@ -349,7 +349,7 @@ private void preCheck() {
           loc, stub, mutation,
           (rn, rm) -> RequestConverter.buildMutateRequest(rn, row, family, qualifier, op, value,
             null, timeRange, rm),
-          resp -> resp.getExists()))
+          resp -> ((CheckAndMutateResult) resp).isSuccess()))

Review comment:
       We have already make use of generic type so why here we still need to cast?




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