1 files changed, 125 insertions, 0 deletions
diff --git a/java/com/google/gerrit/server/notedb/TestChangeRebuilderWrapper.java b/java/com/google/gerrit/server/notedb/TestChangeRebuilderWrapper.java
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+++ b/java/com/google/gerrit/server/notedb/TestChangeRebuilderWrapper.java
@@ -0,0 +1,125 @@
+// Copyright (C) 2016 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.google.gerrit.server.notedb;
+
+import com.google.common.annotations.VisibleForTesting;
+import com.google.gerrit.reviewdb.client.Change;
+import com.google.gerrit.reviewdb.client.Change.Id;
+import com.google.gerrit.reviewdb.client.Project;
+import com.google.gerrit.reviewdb.server.ReviewDb;
+import com.google.gerrit.server.notedb.NoteDbUpdateManager.Result;
+import com.google.gerrit.server.notedb.rebuild.ChangeRebuilder;
+import com.google.gerrit.server.notedb.rebuild.ChangeRebuilderImpl;
+import com.google.gwtorm.server.OrmException;
+import com.google.gwtorm.server.SchemaFactory;
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
+import java.io.IOException;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+@VisibleForTesting
+@Singleton
+public class TestChangeRebuilderWrapper extends ChangeRebuilder {
+  private final ChangeRebuilderImpl delegate;
+  private final AtomicBoolean failNextUpdate;
+  private final AtomicBoolean stealNextUpdate;
+
+  @Inject
+  TestChangeRebuilderWrapper(SchemaFactory<ReviewDb> schemaFactory, ChangeRebuilderImpl rebuilder) {
+    super(schemaFactory);
+    this.delegate = rebuilder;
+    this.failNextUpdate = new AtomicBoolean();
+    this.stealNextUpdate = new AtomicBoolean();
+  }
+
+  public void failNextUpdate() {
+    failNextUpdate.set(true);
+  }
+
+  public void stealNextUpdate() {
+    stealNextUpdate.set(true);
+  }
+
+  @Override
+  public Result rebuild(ReviewDb db, Change.Id changeId) throws IOException, OrmException {
+    return rebuild(db, changeId, true);
+  }
+
+  @Override
+  public Result rebuildEvenIfReadOnly(ReviewDb db, Change.Id changeId)
+      throws IOException, OrmException {
+    return rebuild(db, changeId, false);
+  }
+
+  private Result rebuild(ReviewDb db, Change.Id changeId, boolean checkReadOnly)
+      throws IOException, OrmException {
+    if (failNextUpdate.getAndSet(false)) {
+      throw new IOException("Update failed");
+    }
+    Result result =
+        checkReadOnly
+            ? delegate.rebuild(db, changeId)
+            : delegate.rebuildEvenIfReadOnly(db, changeId);
+    if (stealNextUpdate.getAndSet(false)) {
+      throw new IOException("Update stolen");
+    }
+    return result;
+  }
+
+  @Override
+  public Result rebuild(NoteDbUpdateManager manager, ChangeBundle bundle)
+      throws IOException, OrmException {
+    // stealNextUpdate doesn't really apply in this case because the IOException
+    // would normally come from the manager.execute() method, which isn't called
+    // here.
+    return delegate.rebuild(manager, bundle);
+  }
+
+  @Override
+  public NoteDbUpdateManager stage(ReviewDb db, Change.Id changeId)
+      throws IOException, OrmException {
+    // Don't inspect stealNextUpdate; that happens in execute() below.
+    return delegate.stage(db, changeId);
+  }
+
+  @Override
+  public Result execute(ReviewDb db, Change.Id changeId, NoteDbUpdateManager manager)
+      throws OrmException, IOException {
+    if (failNextUpdate.getAndSet(false)) {
+      throw new IOException("Update failed");
+    }
+    Result result = delegate.execute(db, changeId, manager);
+    if (stealNextUpdate.getAndSet(false)) {
+      throw new IOException("Update stolen");
+    }
+    return result;
+  }
+
+  @Override
+  public void buildUpdates(NoteDbUpdateManager manager, ChangeBundle bundle)
+      throws IOException, OrmException {
+    // Don't check for manual failure; that happens in execute().
+    delegate.buildUpdates(manager, bundle);
+  }
+
+  @Override
+  public void rebuildReviewDb(ReviewDb db, Project.NameKey project, Id changeId)
+      throws OrmException {
+    if (failNextUpdate.getAndSet(false)) {
+      throw new OrmException("Update failed");
+    }
+    delegate.rebuildReviewDb(db, project, changeId);
+  }
+}