Merge branch 'stable-2.15' into stable-2.16

* stable-2.15:
  Removed redundant PLUGIN_DEPS from BUILD
  Format with GJF 1.7
  Add integration test for owners-autoassign
  Prevent infinite event processing with NoteDb
  Look for gerrit:/username: schemes for username
  Get rid of references to ReviewDb

Change-Id: Ia7769a54f6ecae8ce90ecd9f4cd9d231413f8e33
diff --git a/owners-autoassign/BUILD b/owners-autoassign/BUILD
index 13aabbe..463afcb 100644
--- a/owners-autoassign/BUILD
+++ b/owners-autoassign/BUILD
@@ -1,4 +1,5 @@
-load("//tools/bzl:plugin.bzl", "gerrit_plugin")
+load("//tools/bzl:junit.bzl", "junit_tests")
+load("//tools/bzl:plugin.bzl", "PLUGIN_DEPS", "PLUGIN_DEPS_NEVERLINK", "PLUGIN_TEST_DEPS", "gerrit_plugin")
 
 gerrit_plugin(
     name = "owners-autoassign",
@@ -18,3 +19,24 @@
         "//owners-common",
     ],
 )
+
+java_library(
+    name = "owners-autoassign_deps",
+    srcs = glob([
+        "src/main/java/**/*.java",
+    ]),
+    visibility = ["//visibility:public"],
+    deps = PLUGIN_DEPS_NEVERLINK + [
+        "//owners-common",
+    ],
+)
+
+junit_tests(
+    name = "owners_autoassign_tests",
+    testonly = 1,
+    srcs = glob(["src/test/java/**/*.java"]),
+    deps = PLUGIN_DEPS + PLUGIN_TEST_DEPS + [
+        "//owners-common",
+        ":owners-autoassign_deps",
+    ],
+)
diff --git a/owners-autoassign/src/main/java/com/googlesource/gerrit/owners/common/GitRefListener.java b/owners-autoassign/src/main/java/com/googlesource/gerrit/owners/common/GitRefListener.java
index e123534..3eb5754 100644
--- a/owners-autoassign/src/main/java/com/googlesource/gerrit/owners/common/GitRefListener.java
+++ b/owners-autoassign/src/main/java/com/googlesource/gerrit/owners/common/GitRefListener.java
@@ -20,19 +20,22 @@
 
 import com.google.common.collect.Sets;
 import com.google.gerrit.extensions.annotations.Listen;
+import com.google.gerrit.extensions.api.GerritApi;
+import com.google.gerrit.extensions.api.changes.ChangeApi;
+import com.google.gerrit.extensions.api.changes.Changes;
+import com.google.gerrit.extensions.common.ChangeInfo;
 import com.google.gerrit.extensions.events.GitReferenceUpdatedListener;
+import com.google.gerrit.extensions.restapi.RestApiException;
 import com.google.gerrit.reviewdb.client.Account;
 import com.google.gerrit.reviewdb.client.Change;
 import com.google.gerrit.reviewdb.client.Project;
-import com.google.gerrit.reviewdb.server.ReviewDb;
+import com.google.gerrit.reviewdb.client.RefNames;
 import com.google.gerrit.server.git.GitRepositoryManager;
 import com.google.gerrit.server.patch.PatchList;
 import com.google.gerrit.server.patch.PatchListCache;
 import com.google.gerrit.server.patch.PatchListKey;
 import com.google.gerrit.server.patch.PatchListNotAvailableException;
-import com.google.gwtorm.server.OrmException;
 import com.google.inject.Inject;
-import com.google.inject.Provider;
 import java.io.IOException;
 import java.util.Set;
 import org.eclipse.jgit.lib.ObjectId;
@@ -44,9 +47,7 @@
 public class GitRefListener implements GitReferenceUpdatedListener {
   private static final Logger logger = LoggerFactory.getLogger(GitRefListener.class);
 
-  private static final String CHANGES_REF = "refs/changes/";
-
-  private final Provider<ReviewDb> db;
+  private final GerritApi api;
 
   private final PatchListCache patchListCache;
 
@@ -58,12 +59,12 @@
 
   @Inject
   public GitRefListener(
-      Provider<ReviewDb> db,
+      GerritApi api,
       PatchListCache patchListCache,
       GitRepositoryManager repositoryManager,
       Accounts accounts,
       ReviewerManager reviewerManager) {
-    this.db = db;
+    this.api = api;
     this.patchListCache = patchListCache;
     this.repositoryManager = repositoryManager;
     this.accounts = accounts;
@@ -77,7 +78,10 @@
     try {
       repository = repositoryManager.openRepository(Project.NameKey.parse(projectName));
       try {
-        processEvent(repository, event);
+        String refName = event.getRefName();
+        if (refName.startsWith(RefNames.REFS_CHANGES) && !RefNames.isNoteDbMetaRef(refName)) {
+          processEvent(repository, event);
+        }
       } finally {
         repository.close();
       }
@@ -86,38 +90,36 @@
     }
   }
 
-  private void processEvent(Repository repository, Event event) {
-    if (event.getRefName().startsWith(CHANGES_REF)) {
-      Change.Id id = Change.Id.fromRef(event.getRefName());
-      ReviewDb reviewDb = db.get();
-      // The provider injected by Gerrit is shared with other workers on the
-      // same local thread and thus cannot be closed in this event listener.
-      try {
-        Change change = reviewDb.changes().get(id);
-        if (change == null) {
-          return;
-        }
-        PatchList patchList = getPatchList(event, change);
-        if (patchList != null) {
-          PathOwners owners =
-              new PathOwners(accounts, repository, change.getDest().get(), patchList);
-          Set<Account.Id> allReviewers = Sets.newHashSet();
-          allReviewers.addAll(owners.get().values());
-          for (Matcher matcher : owners.getMatchers().values()) {
-            allReviewers.addAll(matcher.getOwners());
-          }
-          logger.debug("Autoassigned reviewers are: {}", allReviewers.toString());
-          reviewerManager.addReviewers(change, allReviewers);
-        }
-      } catch (OrmException e) {
-        logger.warn("Could not open change: {}", id, e);
-      } catch (ReviewerManagerException e) {
-        logger.warn("Could not add reviewers for change: {}", id, e);
+  public void processEvent(Repository repository, Event event) {
+    Change.Id cId = Change.Id.fromRef(event.getRefName());
+    Changes changes = api.changes();
+    // The provider injected by Gerrit is shared with other workers on the
+    // same local thread and thus cannot be closed in this event listener.
+    try {
+      ChangeApi cApi = changes.id(cId.id);
+      ChangeInfo change = cApi.get();
+      if (change == null) {
+        return;
       }
+      PatchList patchList = getPatchList(event, change);
+      if (patchList != null) {
+        PathOwners owners = new PathOwners(accounts, repository, change.branch, patchList);
+        Set<Account.Id> allReviewers = Sets.newHashSet();
+        allReviewers.addAll(owners.get().values());
+        for (Matcher matcher : owners.getMatchers().values()) {
+          allReviewers.addAll(matcher.getOwners());
+        }
+        logger.debug("Autoassigned reviewers are: {}", allReviewers.toString());
+        reviewerManager.addReviewers(cApi, allReviewers);
+      }
+    } catch (RestApiException e) {
+      logger.warn("Could not open change: {}", cId, e);
+    } catch (ReviewerManagerException e) {
+      logger.warn("Could not add reviewers for change: {}", cId, e);
     }
   }
 
-  private PatchList getPatchList(Event event, Change change) {
+  private PatchList getPatchList(Event event, ChangeInfo change) {
     ObjectId newId = null;
     if (event.getNewObjectId() != null) {
       newId = ObjectId.fromString(event.getNewObjectId());
@@ -125,7 +127,7 @@
 
     PatchListKey plKey = PatchListKey.againstCommit(null, newId, IGNORE_NONE);
     try {
-      return patchListCache.get(plKey, change.getProject());
+      return patchListCache.get(plKey, new Project.NameKey(change.project));
     } catch (PatchListNotAvailableException e) {
       logger.warn("Could not load patch list: {}", plKey, e);
     }
diff --git a/owners-autoassign/src/main/java/com/googlesource/gerrit/owners/common/ReviewerManager.java b/owners-autoassign/src/main/java/com/googlesource/gerrit/owners/common/ReviewerManager.java
index f62b8c7..efb9910 100644
--- a/owners-autoassign/src/main/java/com/googlesource/gerrit/owners/common/ReviewerManager.java
+++ b/owners-autoassign/src/main/java/com/googlesource/gerrit/owners/common/ReviewerManager.java
@@ -18,10 +18,11 @@
 
 import com.google.gerrit.extensions.api.GerritApi;
 import com.google.gerrit.extensions.api.changes.AddReviewerInput;
+import com.google.gerrit.extensions.api.changes.ChangeApi;
 import com.google.gerrit.extensions.api.changes.ReviewInput;
+import com.google.gerrit.extensions.common.ChangeInfo;
 import com.google.gerrit.extensions.restapi.RestApiException;
 import com.google.gerrit.reviewdb.client.Account;
-import com.google.gerrit.reviewdb.client.Change;
 import com.google.gerrit.server.util.ManualRequestContext;
 import com.google.gerrit.server.util.OneOffRequestContext;
 import com.google.gwtorm.server.OrmException;
@@ -36,28 +37,32 @@
 public class ReviewerManager {
   private static final Logger log = LoggerFactory.getLogger(ReviewerManager.class);
 
-  private final GerritApi gApi;
   private final OneOffRequestContext requestContext;
+  private final GerritApi gApi;
 
   @Inject
-  public ReviewerManager(GerritApi gApi, OneOffRequestContext requestContext) {
-    this.gApi = gApi;
+  public ReviewerManager(OneOffRequestContext requestContext, GerritApi gApi) {
     this.requestContext = requestContext;
+    this.gApi = gApi;
   }
 
-  public void addReviewers(Change change, Collection<Account.Id> reviewers)
+  public void addReviewers(ChangeApi cApi, Collection<Account.Id> reviewers)
       throws ReviewerManagerException {
-    try (ManualRequestContext ctx = requestContext.openAs(change.getOwner())) {
-      // TODO(davido): Switch back to using changes API again,
-      // when it supports batch mode for adding reviewers
-      ReviewInput in = new ReviewInput();
-      in.reviewers = new ArrayList<>(reviewers.size());
-      for (Account.Id account : reviewers) {
-        AddReviewerInput addReviewerInput = new AddReviewerInput();
-        addReviewerInput.reviewer = account.toString();
-        in.reviewers.add(addReviewerInput);
+    try {
+      ChangeInfo changeInfo = cApi.get();
+      try (ManualRequestContext ctx =
+          requestContext.openAs(new Account.Id(changeInfo.owner._accountId))) {
+        // TODO(davido): Switch back to using changes API again,
+        // when it supports batch mode for adding reviewers
+        ReviewInput in = new ReviewInput();
+        in.reviewers = new ArrayList<>(reviewers.size());
+        for (Account.Id account : reviewers) {
+          AddReviewerInput addReviewerInput = new AddReviewerInput();
+          addReviewerInput.reviewer = account.toString();
+          in.reviewers.add(addReviewerInput);
+        }
+        gApi.changes().id(changeInfo.id).current().review(in);
       }
-      gApi.changes().id(change.getId().get()).current().review(in);
     } catch (RestApiException | OrmException e) {
       log.error("Couldn't add reviewers to the change", e);
       throw new ReviewerManagerException(e);
diff --git a/owners-autoassign/src/test/java/com/vmware/gerrit/owners/common/GitRefListenerIT.java b/owners-autoassign/src/test/java/com/vmware/gerrit/owners/common/GitRefListenerIT.java
new file mode 100644
index 0000000..aa6db4f
--- /dev/null
+++ b/owners-autoassign/src/test/java/com/vmware/gerrit/owners/common/GitRefListenerIT.java
@@ -0,0 +1,75 @@
+// Copyright (C) 2019 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.vmware.gerrit.owners.common;
+
+import static org.junit.Assert.assertEquals;
+
+import com.google.gerrit.acceptance.LightweightPluginDaemonTest;
+import com.google.gerrit.acceptance.TestPlugin;
+import com.google.gerrit.extensions.events.GitReferenceUpdatedListener;
+import com.google.gerrit.reviewdb.client.RefNames;
+import com.google.inject.AbstractModule;
+import org.eclipse.jgit.transport.ReceiveCommand.Type;
+import org.junit.Test;
+
+@TestPlugin(
+    name = "owners-autoassign",
+    sysModule = "com.vmware.gerrit.owners.common.GitRefListenerIT$TestModule")
+public class GitRefListenerIT extends LightweightPluginDaemonTest {
+
+  public static class TestModule extends AbstractModule {
+    @Override
+    protected void configure() {
+      bind(GitReferenceUpdatedListener.class).to(GitRefListenerTest.class);
+    }
+  }
+
+  @Test
+  public void shouldNotProcessNoteDbOnlyRefs() {
+    GitRefListenerTest gitRefListener = getPluginInstance(GitRefListenerTest.class);
+
+    String aRefChange = RefNames.REFS_CHANGES + "01/01" + RefNames.META_SUFFIX;
+    String anOldObjectId = "anOldRef";
+    String aNewObjectId = "aNewRef";
+
+    ReferenceUpdatedEventTest refUpdatedEvent =
+        new ReferenceUpdatedEventTest(
+            project, aRefChange, anOldObjectId, aNewObjectId, Type.CREATE);
+
+    gitRefListener.onGitReferenceUpdated(refUpdatedEvent);
+    assertEquals(0, gitRefListener.getProcessedEvents());
+  }
+
+  @Test
+  public void shouldProcessRefChanges() {
+    GitRefListenerTest gitRefListener = getPluginInstance(GitRefListenerTest.class);
+
+    String aRefChange = RefNames.REFS_CHANGES + "01/01/01";
+    String anOldObjectId = "anOldRef";
+    String aNewObjectId = "aNewRef";
+
+    ReferenceUpdatedEventTest refUpdatedEvent =
+        new ReferenceUpdatedEventTest(
+            project, aRefChange, anOldObjectId, aNewObjectId, Type.CREATE);
+
+    gitRefListener.onGitReferenceUpdated(refUpdatedEvent);
+    assertEquals(1, gitRefListener.getProcessedEvents());
+  }
+
+  private <T> T getPluginInstance(Class<T> clazz) {
+    return plugin.getSysInjector().getInstance(clazz);
+  }
+}
diff --git a/owners-autoassign/src/test/java/com/vmware/gerrit/owners/common/GitRefListenerTest.java b/owners-autoassign/src/test/java/com/vmware/gerrit/owners/common/GitRefListenerTest.java
new file mode 100644
index 0000000..dbeedd4
--- /dev/null
+++ b/owners-autoassign/src/test/java/com/vmware/gerrit/owners/common/GitRefListenerTest.java
@@ -0,0 +1,35 @@
+package com.vmware.gerrit.owners.common;
+
+import com.google.gerrit.extensions.api.GerritApi;
+import com.google.gerrit.server.git.GitRepositoryManager;
+import com.google.gerrit.server.patch.PatchListCache;
+import com.google.inject.Inject;
+import com.googlesource.gerrit.owners.common.Accounts;
+import com.googlesource.gerrit.owners.common.GitRefListener;
+import com.googlesource.gerrit.owners.common.ReviewerManager;
+import org.eclipse.jgit.lib.Repository;
+import org.junit.Ignore;
+
+@Ignore
+public class GitRefListenerTest extends GitRefListener {
+  int processedEvents = 0;
+
+  @Inject
+  public GitRefListenerTest(
+          GerritApi api,
+          PatchListCache patchListCache,
+          GitRepositoryManager repositoryManager,
+          Accounts accounts,
+          ReviewerManager reviewerManager) {
+    super(api, patchListCache, repositoryManager, accounts, reviewerManager);
+  }
+
+  @Override
+  public void processEvent(Repository repository, Event event) {
+    processedEvents++;
+  }
+
+  int getProcessedEvents() {
+    return processedEvents;
+  }
+}
diff --git a/owners-autoassign/src/test/java/com/vmware/gerrit/owners/common/ReferenceUpdatedEventTest.java b/owners-autoassign/src/test/java/com/vmware/gerrit/owners/common/ReferenceUpdatedEventTest.java
new file mode 100644
index 0000000..601ec8d
--- /dev/null
+++ b/owners-autoassign/src/test/java/com/vmware/gerrit/owners/common/ReferenceUpdatedEventTest.java
@@ -0,0 +1,76 @@
+package com.vmware.gerrit.owners.common;
+
+import com.google.gerrit.extensions.api.changes.NotifyHandling;
+import com.google.gerrit.extensions.common.AccountInfo;
+import com.google.gerrit.extensions.events.GitReferenceUpdatedListener;
+import com.google.gerrit.reviewdb.client.Project;
+import org.eclipse.jgit.transport.ReceiveCommand;
+import org.junit.Ignore;
+
+@Ignore
+public class ReferenceUpdatedEventTest implements GitReferenceUpdatedListener.Event {
+
+  private final String projectName;
+  private final String ref;
+  private final String oldObjectId;
+  private final String newObjectId;
+  private final ReceiveCommand.Type type;
+
+  public ReferenceUpdatedEventTest(
+      Project.NameKey project,
+      String ref,
+      String oldObjectId,
+      String newObjectId,
+      ReceiveCommand.Type type) {
+    this.projectName = project.get();
+    this.ref = ref;
+    this.oldObjectId = oldObjectId;
+    this.newObjectId = newObjectId;
+    this.type = type;
+  }
+
+  @Override
+  public String getProjectName() {
+    return projectName;
+  }
+
+  @Override
+  public String getRefName() {
+    return ref;
+  }
+
+  @Override
+  public String getOldObjectId() {
+    return oldObjectId;
+  }
+
+  @Override
+  public String getNewObjectId() {
+    return newObjectId;
+  }
+
+  @Override
+  public boolean isCreate() {
+    return type == ReceiveCommand.Type.CREATE;
+  }
+
+  @Override
+  public boolean isDelete() {
+    return type == ReceiveCommand.Type.DELETE;
+  }
+
+  @Override
+  public boolean isNonFastForward() {
+    return type == ReceiveCommand.Type.UPDATE_NONFASTFORWARD;
+  }
+
+  @Override
+  public AccountInfo getUpdater() {
+    return null;
+  }
+
+  @Override
+  public NotifyHandling getNotify() {
+    return NotifyHandling.NONE;
+  }
+}
diff --git a/owners-common/src/main/java/com/googlesource/gerrit/owners/common/AccountsImpl.java b/owners-common/src/main/java/com/googlesource/gerrit/owners/common/AccountsImpl.java
index 8a12871..106a91a 100644
--- a/owners-common/src/main/java/com/googlesource/gerrit/owners/common/AccountsImpl.java
+++ b/owners-common/src/main/java/com/googlesource/gerrit/owners/common/AccountsImpl.java
@@ -16,10 +16,13 @@
 
 import static com.google.gerrit.server.account.externalids.ExternalId.SCHEME_GERRIT;
 import static com.google.gerrit.server.account.externalids.ExternalId.SCHEME_MAILTO;
+import static com.google.gerrit.server.account.externalids.ExternalId.SCHEME_USERNAME;
 
+import com.google.gerrit.common.errors.NoSuchGroupException;
 import com.google.gerrit.reviewdb.client.Account;
 import com.google.gerrit.reviewdb.client.Account.Id;
 import com.google.gerrit.reviewdb.client.AccountGroup;
+import com.google.gerrit.server.IdentifiedUser;
 import com.google.gerrit.server.account.AccountCache;
 import com.google.gerrit.server.account.AccountResolver;
 import com.google.gerrit.server.account.AccountState;
@@ -48,6 +51,7 @@
   private final AccountCache byId;
   private final GroupCache groupCache;
   private final GroupMembers groupMembers;
+  private final IdentifiedUser adminUser;
   private final OneOffRequestContext oneOffRequestContext;
 
   @Inject
@@ -56,11 +60,13 @@
       AccountCache byId,
       GroupCache groupCache,
       GroupMembers groupMembers,
-      OneOffRequestContext oneOffRequestContext) {
+      OneOffRequestContext oneOffRequestContext,
+      IdentifiedUser.GenericFactory userFactory) {
     this.resolver = resolver;
     this.byId = byId;
     this.groupCache = groupCache;
     this.groupMembers = groupMembers;
+    this.adminUser = userFactory.create(new Account.Id(1000000));
     this.oneOffRequestContext = oneOffRequestContext;
   }
 
@@ -84,11 +90,12 @@
       return Collections.emptySet();
     }
 
-    try {
+    try (ManualRequestContext ctx = oneOffRequestContext.openAs(adminUser.getAccountId())) {
+
       return groupMembers.listAccounts(group.get().getGroupUUID(), null).stream()
           .map(Account::getId)
           .collect(Collectors.toSet());
-    } catch (NoSuchProjectException | IOException e) {
+    } catch (NoSuchProjectException | OrmException | IOException e) {
       log.error("Unable to list accounts in group " + group, e);
       return Collections.emptySet();
     }
@@ -153,7 +160,9 @@
   }
 
   private boolean isUsernameMatch(ExternalId externalId, String username) {
-    return keySchemeRest(SCHEME_GERRIT, externalId.key())
+    return OptionalUtils.combine(
+            keySchemeRest(SCHEME_GERRIT, externalId.key()),
+            keySchemeRest(SCHEME_USERNAME, externalId.key()))
         .filter(name -> name.equals(username))
         .isPresent();
   }
diff --git a/owners-common/src/test/java/com/googlesource/gerrit/owners/common/Config.java b/owners-common/src/test/java/com/googlesource/gerrit/owners/common/Config.java
index e6e1e91..a5df462 100644
--- a/owners-common/src/test/java/com/googlesource/gerrit/owners/common/Config.java
+++ b/owners-common/src/test/java/com/googlesource/gerrit/owners/common/Config.java
@@ -20,7 +20,6 @@
 
 import com.google.common.base.Charsets;
 import com.google.gerrit.reviewdb.client.Patch;
-import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.patch.PatchList;
 import com.google.gerrit.server.patch.PatchListEntry;
 import java.io.IOException;
@@ -34,7 +33,6 @@
 
 @Ignore
 public abstract class Config {
-  protected ReviewDb db;
   protected Repository repository;
   protected PatchList patchList;
   protected ConfigurationParser parser;