Revert "Properly propagate failure when ref deletion fails"

This reverts commit ced058a15a212b76dcd858cc5bdb6d883def88cb.

Reason for revert: Ref deletion upon fetches was not properly
implemented in stable-3.5 and therefore this fix should not be applied
in this branch.

Bug: Issue 288965464
Change-Id: I334812e07639ff4c6e4f89f9d3cce62a25b1246e
diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/FetchRefReplicatedEvent.java b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/FetchRefReplicatedEvent.java
index 2c18983..0eabf42 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/FetchRefReplicatedEvent.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/FetchRefReplicatedEvent.java
@@ -14,7 +14,6 @@
 
 package com.googlesource.gerrit.plugins.replication.pull;
 
-import com.google.common.annotations.VisibleForTesting;
 import com.google.gerrit.entities.Project;
 import com.googlesource.gerrit.plugins.replication.events.RemoteRefReplicationEvent;
 import java.util.Objects;
@@ -75,9 +74,4 @@
   public String getRefName() {
     return ref;
   }
-
-  @VisibleForTesting
-  public RefUpdate.Result getRefUpdateResult() {
-    return refUpdateResult;
-  }
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/api/DeleteRefCommand.java b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/api/DeleteRefCommand.java
index 6b2a0cf..949e032 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/api/DeleteRefCommand.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/api/DeleteRefCommand.java
@@ -35,7 +35,6 @@
 import com.googlesource.gerrit.plugins.replication.pull.ReplicationState;
 import com.googlesource.gerrit.plugins.replication.pull.Source;
 import com.googlesource.gerrit.plugins.replication.pull.SourcesCollection;
-import com.googlesource.gerrit.plugins.replication.pull.api.exception.DeleteRefException;
 import com.googlesource.gerrit.plugins.replication.pull.fetch.ApplyObject;
 import com.googlesource.gerrit.plugins.replication.pull.fetch.RefUpdateState;
 import java.io.IOException;
@@ -107,7 +106,7 @@
       try {
 
         Context.setLocalEvent(true);
-        RefUpdate.Result successResult = ensureSuccess(deleteRef(name, ref.get()));
+        deleteRef(name, ref.get());
 
         eventDispatcher
             .get()
@@ -117,17 +116,13 @@
                     refName,
                     sourceUri,
                     ReplicationState.RefFetchResult.SUCCEEDED,
-                    successResult));
+                    RefUpdate.Result.FORCED));
       } catch (PermissionBackendException e) {
         logger.atSevere().withCause(e).log(
             "Unexpected error while trying to delete ref '%s' on project %s and notifying it",
             refName, name);
         throw RestApiException.wrap(e.getMessage(), e);
       } catch (IOException e) {
-        RefUpdate.Result refUpdateResult =
-            e instanceof DeleteRefException
-                ? ((DeleteRefException) e).getResult()
-                : RefUpdate.Result.LOCK_FAILURE;
         eventDispatcher
             .get()
             .postEvent(
@@ -136,7 +131,7 @@
                     refName,
                     sourceUri,
                     ReplicationState.RefFetchResult.FAILED,
-                    refUpdateResult));
+                    RefUpdate.Result.LOCK_FAILURE));
         String message =
             String.format(
                 "RefUpdate lock failure for: sourceLabel=%s, project=%s, refName=%s",
@@ -175,19 +170,4 @@
       return new RefUpdateState(ref.getName(), result);
     }
   }
-
-  private static RefUpdate.Result ensureSuccess(RefUpdateState refUpdateState)
-      throws DeleteRefException {
-    switch (refUpdateState.getResult()) {
-      case NOT_ATTEMPTED:
-      case REJECTED:
-      case REJECTED_CURRENT_BRANCH:
-      case REJECTED_MISSING_OBJECT:
-      case LOCK_FAILURE:
-      case IO_FAILURE:
-      case REJECTED_OTHER_REASON:
-        throw new DeleteRefException("Failed ref deletion", refUpdateState.getResult());
-    }
-    return refUpdateState.getResult();
-  }
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/api/exception/DeleteRefException.java b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/api/exception/DeleteRefException.java
deleted file mode 100644
index a1d6876..0000000
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/api/exception/DeleteRefException.java
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright (C) 2024 The Android Open Source Project
-//
-// Licensed 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 com.googlesource.gerrit.plugins.replication.pull.api.exception;
-
-import java.io.IOException;
-import org.eclipse.jgit.lib.RefUpdate;
-
-public class DeleteRefException extends IOException {
-
-  private static final long serialVersionUID = 1L;
-  private final RefUpdate.Result result;
-
-  public DeleteRefException(String msg, RefUpdate.Result result) {
-    super(msg);
-    this.result = result;
-  }
-
-  public RefUpdate.Result getResult() {
-    return result;
-  }
-}
diff --git a/src/test/java/com/googlesource/gerrit/plugins/replication/pull/api/DeleteRefCommandTest.java b/src/test/java/com/googlesource/gerrit/plugins/replication/pull/api/DeleteRefCommandTest.java
index 213deec..9361a77 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/replication/pull/api/DeleteRefCommandTest.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/replication/pull/api/DeleteRefCommandTest.java
@@ -15,7 +15,6 @@
 package com.googlesource.gerrit.plugins.replication.pull.api;
 
 import static com.google.common.truth.Truth.assertThat;
-import static com.google.gerrit.testing.GerritJUnit.assertThrows;
 import static org.mockito.Mockito.any;
 import static org.mockito.Mockito.anyString;
 import static org.mockito.Mockito.never;
@@ -38,11 +37,9 @@
 import com.googlesource.gerrit.plugins.replication.pull.FetchRefReplicatedEvent;
 import com.googlesource.gerrit.plugins.replication.pull.LocalGitRepositoryManagerProvider;
 import com.googlesource.gerrit.plugins.replication.pull.PullReplicationStateLogger;
-import com.googlesource.gerrit.plugins.replication.pull.ReplicationState;
 import com.googlesource.gerrit.plugins.replication.pull.Source;
 import com.googlesource.gerrit.plugins.replication.pull.SourcesCollection;
 import com.googlesource.gerrit.plugins.replication.pull.fetch.ApplyObject;
-import java.io.IOException;
 import java.util.Optional;
 import org.eclipse.jgit.lib.Ref;
 import org.eclipse.jgit.lib.RefDatabase;
@@ -118,7 +115,12 @@
 
     objectUnderTest.deleteRef(TEST_PROJECT_NAME, TEST_REF_NAME, TEST_SOURCE_LABEL);
 
-    assertFetchReplicatedEvent(ReplicationState.RefFetchResult.SUCCEEDED, Result.FORCED);
+    verify(eventDispatcher).postEvent(eventCaptor.capture());
+    Event sentEvent = eventCaptor.getValue();
+    assertThat(sentEvent).isInstanceOf(FetchRefReplicatedEvent.class);
+    FetchRefReplicatedEvent fetchEvent = (FetchRefReplicatedEvent) sentEvent;
+    assertThat(fetchEvent.getProjectNameKey()).isEqualTo(TEST_PROJECT_NAME);
+    assertThat(fetchEvent.getRefName()).isEqualTo(TEST_REF_NAME);
   }
 
   @Test
@@ -139,28 +141,4 @@
 
     verify(eventDispatcher, never()).postEvent(any());
   }
-
-  @Test
-  public void shouldThrowWhenRefDeletionFails() throws Exception {
-    when(source.isMirror()).thenReturn(true);
-    when(refUpdate.delete()).thenReturn(Result.LOCK_FAILURE);
-
-    assertThrows(
-        IOException.class,
-        () -> objectUnderTest.deleteRef(TEST_PROJECT_NAME, TEST_REF_NAME, TEST_SOURCE_LABEL));
-
-    assertFetchReplicatedEvent(ReplicationState.RefFetchResult.FAILED, Result.LOCK_FAILURE);
-  }
-
-  private void assertFetchReplicatedEvent(
-      ReplicationState.RefFetchResult refFetchResult, RefUpdate.Result result) throws Exception {
-    verify(eventDispatcher).postEvent(eventCaptor.capture());
-    Event sentEvent = eventCaptor.getValue();
-    assertThat(sentEvent).isInstanceOf(FetchRefReplicatedEvent.class);
-    FetchRefReplicatedEvent fetchEvent = (FetchRefReplicatedEvent) sentEvent;
-    assertThat(fetchEvent.getProjectNameKey()).isEqualTo(TEST_PROJECT_NAME);
-    assertThat(fetchEvent.getRefName()).isEqualTo(TEST_REF_NAME);
-    assertThat(fetchEvent.getStatus()).isEqualTo(refFetchResult.toString());
-    assertThat(fetchEvent.getRefUpdateResult()).isEqualTo(result);
-  }
 }