Do not provide response body when apply-object is successful When `replication.maxApiPayloadSize` is set to a significant value(for example 100mb) returning full json payload as a part of the HTTP response can impact the performance. To avoid sending the payload back to the client skip response body and return just the http status code. Bug: Issue 289700653 Change-Id: Ic0c343c1971cb9cefbcbf067033338b953d05bef

diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/api/ApplyObjectAction.java b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/api/ApplyObjectAction.java
index b3379f2..72f0266 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/api/ApplyObjectAction.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/api/ApplyObjectAction.java

@@ -102,7 +102,7 @@
           input.getRevisionData(),
           input.getLabel(),
           input.getEventCreatedOn());
-      return Response.created(input);
+      return Response.created();
     } catch (MissingParentObjectException e) {
       repLog.error(
           "Apply object API *FAILED* from {} for {}:{} - {}",

diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/api/ApplyObjectsAction.java b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/api/ApplyObjectsAction.java
index dd155d4..817ea00 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/api/ApplyObjectsAction.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/api/ApplyObjectsAction.java

@@ -102,7 +102,7 @@
           input.getRevisionsData(),
           input.getLabel(),
           input.getEventCreatedOn());
-      return Response.created(input);
+      return Response.created();
     } catch (MissingParentObjectException e) {
       repLog.error(
           "Apply object API *FAILED* from {} for {}:{} - {}",

diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/api/PullReplicationFilter.java b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/api/PullReplicationFilter.java
index d18ebc0..d646cfb 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/api/PullReplicationFilter.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/api/PullReplicationFilter.java

@@ -182,23 +182,23 @@
   }
 
   @SuppressWarnings("unchecked")
-  private Response<Map<String, Object>> doApplyObject(HttpServletRequest httpRequest)
+  private Response<String> doApplyObject(HttpServletRequest httpRequest)
       throws RestApiException, IOException, PermissionBackendException {
     RevisionInput input = readJson(httpRequest, TypeLiteral.get(RevisionInput.class));
     IdString id = getProjectName(httpRequest).get();
     ProjectResource projectResource = projectsCollection.parse(TopLevelResource.INSTANCE, id);
 
-    return (Response<Map<String, Object>>) applyObjectAction.apply(projectResource, input);
+    return (Response<String>) applyObjectAction.apply(projectResource, input);
   }
 
   @SuppressWarnings("unchecked")
-  private Response<Map<String, Object>> doApplyObjects(HttpServletRequest httpRequest)
+  private Response<String> doApplyObjects(HttpServletRequest httpRequest)
       throws RestApiException, IOException, PermissionBackendException {
     RevisionsInput input = readJson(httpRequest, TypeLiteral.get(RevisionsInput.class));
     IdString id = getProjectName(httpRequest).get();
     ProjectResource projectResource = projectsCollection.parse(TopLevelResource.INSTANCE, id);
 
-    return (Response<Map<String, Object>>) applyObjectsAction.apply(projectResource, input);
+    return (Response<String>) applyObjectsAction.apply(projectResource, input);
   }
 
   @SuppressWarnings("unchecked")

diff --git a/src/test/java/com/googlesource/gerrit/plugins/replication/pull/api/ApplyObjectActionTest.java b/src/test/java/com/googlesource/gerrit/plugins/replication/pull/api/ApplyObjectActionTest.java
index 6ef5b2a..7ae3a78 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/replication/pull/api/ApplyObjectActionTest.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/replication/pull/api/ApplyObjectActionTest.java

@@ -124,12 +124,12 @@
 
   @SuppressWarnings("cast")
   @Test
-  public void shouldReturnSourceUrlAndrefNameAsAResponseBody() throws Exception {
+  public void shouldReturnEmptyResponseBody() throws Exception {
     RevisionInput inputParams =
         new RevisionInput(label, refName, DUMMY_EVENT_TIMESTAMP, createSampleRevisionData());
     Response<?> response = applyObjectAction.apply(projectResource, inputParams);
 
-    assertThat((RevisionInput) response.value()).isEqualTo(inputParams);
+    assertThat((String) response.value()).isEmpty();
   }
 
   @Test(expected = BadRequestException.class)