fix: updating return types of ack/nack futures to be consistent with publish (#1204)

* fix: updating return types of ack/nack to be consistent with publish

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* reverting a README change

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Co-authored-by: Owl Bot 

Author: mmicatka

README.md

@@ -58,13 +58,13 @@ implementation 'com.google.cloud:google-cloud-pubsub'
 If you are using Gradle without BOM, add this to your dependencies:
 
 ```Groovy
-implementation 'com.google.cloud:google-cloud-pubsub:1.120.2'
+implementation 'com.google.cloud:google-cloud-pubsub:1.120.3'
 ```
 
 If you are using SBT, add this to your dependencies:
 
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-pubsub" % "1.120.2"
+libraryDependencies += "com.google.cloud" % "google-cloud-pubsub" % "1.120.3"
 ```
 
 ## Authentication

google-cloud-pubsub/clirr-ignored-differences.xml

@@ -17,4 +17,21 @@
     <className>com/google/cloud/pubsub/v1/MessageDispatcher$BuilderclassName>
     <method>com.google.cloud.pubsub.v1.MessageDispatcher$Builder setEnableExactlyOnceDelivery(boolean)method>
   difference>
+
+  <difference>
+    
+    <differenceType>7006differenceType>
+    <className>com/google/cloud/pubsub/v1/AckReplyConsumerWithResponseclassName>
+    <method>*ack()method>
+    <to>com.google.api.core.ApiFutureto>
+    <justification>Updating return types to be consistent with Publishjustification>
+  difference>
+  <difference>
+    
+    <differenceType>7006differenceType>
+    <className>com/google/cloud/pubsub/v1/AckReplyConsumerWithResponseImplclassName>
+    <method>*ack()method>
+    <to>com.google.api.core.ApiFutureto>
+    <justification>Updating return types to be consistent with Publishjustification>
+  difference>
 differences>

google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/AckReplyConsumerWithResponse.java

@@ -16,8 +16,8 @@
 
 package com.google.cloud.pubsub.v1;
 
+import com.google.api.core.ApiFuture;
 import com.google.api.core.BetaApi;
-import java.util.concurrent.Future;
 
 /**
  * Acknowledging a message in Pub/Sub means that you are done with it, and it will not be delivered
@@ -42,13 +42,13 @@ public interface AckReplyConsumerWithResponse {
    *
    * A future representing the server response is returned
    */
-  Future<AckResponse> ack();
+  ApiFuture<AckResponse> ack();
 
   /**
    * Signals that the message has not been successfully processed. The service should resend the
    * message.
    *
    * A future representing the server response is returned
    */
-  Future<AckResponse> nack();
+  ApiFuture<AckResponse> nack();
 }

google-cloud-pubsub/src/main/java/com/google/cloud/pubsub/v1/AckReplyConsumerWithResponseImpl.java

@@ -15,8 +15,8 @@
  */
 package com.google.cloud.pubsub.v1;
 
+import com.google.api.core.ApiFuture;
 import com.google.api.core.SettableApiFuture;
-import java.util.concurrent.Future;
 
 public class AckReplyConsumerWithResponseImpl implements AckReplyConsumerWithResponse {
   final SettableApiFuture<MessageDispatcher.AckReply> ackReplySettableApiFuture;
@@ -30,13 +30,13 @@ public AckReplyConsumerWithResponseImpl(
   }
 
   @Override
-  public Future<AckResponse> ack() {
+  public ApiFuture<AckResponse> ack() {
     ackReplySettableApiFuture.set(MessageDispatcher.AckReply.ACK);
     return messageFuture;
   }
 
   @Override
-  public Future<AckResponse> nack() {
+  public ApiFuture<AckResponse> nack() {
     ackReplySettableApiFuture.set(MessageDispatcher.AckReply.NACK);
     return messageFuture;
   }