Merge changes I9369c39f,I03d7eeb4

* changes:
  ChangeNoteUtil: Support PersonIdent creation by account ID
  FromAddressGeneratorProvider: Use AccountCache#maybeGet instead of AccountCache#get

java/com/google/gerrit/server/mail/send/FromAddressGeneratorProvider.java

@@ -20,6 +20,7 @@ import com.google.gerrit.common.data.ParameterizedString;
 import com.google.gerrit.reviewdb.client.Account;
 import com.google.gerrit.server.GerritPersonIdent;
 import com.google.gerrit.server.account.AccountCache;
+import com.google.gerrit.server.account.AccountState;
 import com.google.gerrit.server.config.AnonymousCowardName;
 import com.google.gerrit.server.config.GerritServerConfig;
 import com.google.gerrit.server.mail.Address;
@@ -29,6 +30,7 @@ import com.google.inject.Provider;
 import com.google.inject.Singleton;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
+import java.util.Optional;
 import java.util.regex.Pattern;
 import org.apache.commons.codec.binary.Base64;
 import org.eclipse.jgit.lib.Config;
@@ -121,9 +123,9 @@ public class FromAddressGeneratorProvider implements Provider<FromAddressGenerat
     public Address from(Account.Id fromId) {
       String senderName;
       if (fromId != null) {
-        Account a = accountCache.get(fromId).getAccount();
-        String fullName = a.getFullName();
-        String userEmail = a.getPreferredEmail();
+        Optional<Account> a = accountCache.maybeGet(fromId).map(AccountState::getAccount);
+        String fullName = a.map(Account::getFullName).orElse(null);
+        String userEmail = a.map(Account::getPreferredEmail).orElse(null);
         if (canRelay(userEmail)) {
           return new Address(fullName, userEmail);
         }
@@ -206,8 +208,8 @@ public class FromAddressGeneratorProvider implements Provider<FromAddressGenerat
       final String senderName;
 
       if (fromId != null) {
-        final Account account = accountCache.get(fromId).getAccount();
-        String fullName = account.getFullName();
+        String fullName =
+            accountCache.maybeGet(fromId).map(a -> a.getAccount().getFullName()).orElse(null);
         if (fullName == null || "".equals(fullName)) {
           fullName = anonymousCowardName;
         }

java/com/google/gerrit/server/notedb/AbstractChangeUpdate.java

@@ -174,8 +174,8 @@ public abstract class AbstractChangeUpdate {
     return accountId;
   }
 
-  protected PersonIdent newIdent(Account author, Date when) {
-    return noteUtil.newIdent(author, when, serverIdent);
+  protected PersonIdent newIdent(Account.Id authorId, Date when) {
+    return noteUtil.newIdent(authorId, when, serverIdent);
   }
 
   /** Whether no updates have been done. */

java/com/google/gerrit/server/notedb/ChangeNoteUtil.java

@@ -129,6 +129,12 @@ public class ChangeNoteUtil {
     this.writeJson = config.getBoolean("notedb", "writeJson", true);
   }
 
+  public PersonIdent newIdent(Account.Id authorId, Date when, PersonIdent serverIdent) {
+    Account author = accountCache.get(authorId).getAccount();
+    return new PersonIdent(
+        author.getName(), author.getId().get() + "@" + serverId, when, serverIdent.getTimeZone());
+  }
+
   @VisibleForTesting
   public PersonIdent newIdent(Account author, Date when, PersonIdent serverIdent) {
     return new PersonIdent(
@@ -609,7 +615,7 @@ public class ChangeNoteUtil {
   }
 
   private void appendIdent(PrintWriter writer, String header, Account.Id id, Timestamp ts) {
-    PersonIdent ident = newIdent(accountCache.get(id).getAccount(), ts, serverIdent);
+    PersonIdent ident = newIdent(id, ts, serverIdent);
     StringBuilder name = new StringBuilder();
     PersonIdent.appendSanitized(name, ident.getName());
     name.append(" <");

java/com/google/gerrit/server/notedb/ChangeUpdate.java

@@ -61,7 +61,6 @@ import com.google.gerrit.reviewdb.client.RevId;
 import com.google.gerrit.reviewdb.client.RobotComment;
 import com.google.gerrit.server.CurrentUser;
 import com.google.gerrit.server.GerritPersonIdent;
-import com.google.gerrit.server.account.AccountCache;
 import com.google.gerrit.server.config.GerritServerConfig;
 import com.google.gerrit.server.mail.Address;
 import com.google.gerrit.server.project.ProjectCache;
@@ -124,7 +123,6 @@ public class ChangeUpdate extends AbstractChangeUpdate {
         ChangeNotes notes, CurrentUser user, Date when, Comparator<String> labelNameComparator);
   }
 
-  private final AccountCache accountCache;
   private final NoteDbUpdateManager.Factory updateManagerFactory;
   private final ChangeDraftUpdate.Factory draftUpdateFactory;
   private final RobotCommentUpdate.Factory robotCommentUpdateFactory;
@@ -168,7 +166,6 @@ public class ChangeUpdate extends AbstractChangeUpdate {
       @GerritServerConfig Config cfg,
       @GerritPersonIdent PersonIdent serverIdent,
       NotesMigration migration,
-      AccountCache accountCache,
       NoteDbUpdateManager.Factory updateManagerFactory,
       ChangeDraftUpdate.Factory draftUpdateFactory,
       RobotCommentUpdate.Factory robotCommentUpdateFactory,
@@ -181,7 +178,6 @@ public class ChangeUpdate extends AbstractChangeUpdate {
         cfg,
         serverIdent,
         migration,
-        accountCache,
         updateManagerFactory,
         draftUpdateFactory,
         robotCommentUpdateFactory,
@@ -198,7 +194,6 @@ public class ChangeUpdate extends AbstractChangeUpdate {
       @GerritServerConfig Config cfg,
       @GerritPersonIdent PersonIdent serverIdent,
       NotesMigration migration,
-      AccountCache accountCache,
       NoteDbUpdateManager.Factory updateManagerFactory,
       ChangeDraftUpdate.Factory draftUpdateFactory,
       RobotCommentUpdate.Factory robotCommentUpdateFactory,
@@ -212,7 +207,6 @@ public class ChangeUpdate extends AbstractChangeUpdate {
         cfg,
         serverIdent,
         migration,
-        accountCache,
         updateManagerFactory,
         draftUpdateFactory,
         robotCommentUpdateFactory,
@@ -234,7 +228,6 @@ public class ChangeUpdate extends AbstractChangeUpdate {
       @GerritServerConfig Config cfg,
       @GerritPersonIdent PersonIdent serverIdent,
       NotesMigration migration,
-      AccountCache accountCache,
       NoteDbUpdateManager.Factory updateManagerFactory,
       ChangeDraftUpdate.Factory draftUpdateFactory,
       RobotCommentUpdate.Factory robotCommentUpdateFactory,
@@ -245,7 +238,6 @@ public class ChangeUpdate extends AbstractChangeUpdate {
       @Assisted Comparator<String> labelNameComparator,
       ChangeNoteUtil noteUtil) {
     super(cfg, migration, notes, user, serverIdent, noteUtil, when);
-    this.accountCache = accountCache;
     this.updateManagerFactory = updateManagerFactory;
     this.draftUpdateFactory = draftUpdateFactory;
     this.robotCommentUpdateFactory = robotCommentUpdateFactory;
@@ -258,7 +250,6 @@ public class ChangeUpdate extends AbstractChangeUpdate {
       @GerritServerConfig Config cfg,
       @GerritPersonIdent PersonIdent serverIdent,
       NotesMigration migration,
-      AccountCache accountCache,
       NoteDbUpdateManager.Factory updateManagerFactory,
       ChangeDraftUpdate.Factory draftUpdateFactory,
       RobotCommentUpdate.Factory robotCommentUpdateFactory,
@@ -281,7 +272,6 @@ public class ChangeUpdate extends AbstractChangeUpdate {
         realAccountId,
         authorIdent,
         when);
-    this.accountCache = accountCache;
     this.draftUpdateFactory = draftUpdateFactory;
     this.robotCommentUpdateFactory = robotCommentUpdateFactory;
     this.updateManagerFactory = updateManagerFactory;
@@ -861,8 +851,7 @@ public class ChangeUpdate extends AbstractChangeUpdate {
   }
 
   private StringBuilder addIdent(StringBuilder sb, Account.Id accountId) {
-    Account account = accountCache.get(accountId).getAccount();
-    PersonIdent ident = newIdent(account, when);
+    PersonIdent ident = newIdent(accountId, when);
 
     PersonIdent.appendSanitized(sb, ident.getName());
     sb.append(" <");

java/com/google/gerrit/server/notedb/rebuild/ChangeRebuilderImpl.java

@@ -49,7 +49,6 @@ import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.reviewdb.server.ReviewDbUtil;
 import com.google.gerrit.server.CommentsUtil;
 import com.google.gerrit.server.GerritPersonIdent;
-import com.google.gerrit.server.account.AccountCache;
 import com.google.gerrit.server.config.GerritServerConfig;
 import com.google.gerrit.server.config.GerritServerId;
 import com.google.gerrit.server.notedb.ChangeBundle;
@@ -113,7 +112,6 @@ public class ChangeRebuilderImpl extends ChangeRebuilder {
    */
   static final long MAX_DELTA_MS = SECONDS.toMillis(1);
 
-  private final AccountCache accountCache;
   private final ChangeBundleReader bundleReader;
   private final ChangeDraftUpdate.Factory draftUpdateFactory;
   private final ChangeNoteUtil changeNoteUtil;
@@ -132,7 +130,6 @@ public class ChangeRebuilderImpl extends ChangeRebuilder {
   ChangeRebuilderImpl(
       @GerritServerConfig Config cfg,
       SchemaFactory<ReviewDb> schemaFactory,
-      AccountCache accountCache,
       ChangeBundleReader bundleReader,
       ChangeDraftUpdate.Factory draftUpdateFactory,
       ChangeNoteUtil changeNoteUtil,
@@ -146,7 +143,6 @@ public class ChangeRebuilderImpl extends ChangeRebuilder {
       @Nullable ProjectCache projectCache,
       @GerritServerId String serverId) {
     super(schemaFactory);
-    this.accountCache = accountCache;
     this.bundleReader = bundleReader;
     this.draftUpdateFactory = draftUpdateFactory;
     this.changeNoteUtil = changeNoteUtil;
@@ -551,8 +547,7 @@ public class ChangeRebuilderImpl extends ChangeRebuilder {
     if (id == null) {
       return new PersonIdent(serverIdent, events.getWhen());
     }
-    return changeNoteUtil.newIdent(
-        accountCache.get(id).getAccount(), events.getWhen(), serverIdent);
+    return changeNoteUtil.newIdent(id, events.getWhen(), serverIdent);
   }
 
   private List<HashtagsEvent> getHashtagsEvents(Change change, NoteDbUpdateManager manager)