SubmitStrategy: Eagerly evaluate server ident

Calling get() multiple times may return skewed results, and can
clutter code. Running submit strategies is already pretty expensive;
don't worry about the cost of one more eager allocation.

Change-Id: I7b0b74ab376656f7e48d6343162af0a86765201a

gerrit-server/src/main/java/com/google/gerrit/server/git/strategy/CherryPick.java

@@ -150,7 +150,7 @@ public class CherryPick extends SubmitStrategy {
           args.mergeUtil.createCherryPickCommitMessage(toMerge);
 
       PersonIdent committer = args.caller.newCommitterIdent(
-          ctx.getWhen(), args.serverIdent.get().getTimeZone());
+          ctx.getWhen(), args.serverIdent.getTimeZone());
       try {
         newCommit = args.mergeUtil.createCherryPickFromCommit(
             args.repo, args.inserter, mergeTip.getCurrentTip(), toMerge,
@@ -230,8 +230,7 @@ public class CherryPick extends SubmitStrategy {
       if (args.rw.isMergedInto(mergeTip.getCurrentTip(), toMerge)) {
         mergeTip.moveTipTo(toMerge, toMerge);
       } else {
-        PersonIdent myIdent =
-            new PersonIdent(args.serverIdent.get(), ctx.getWhen());
+        PersonIdent myIdent = new PersonIdent(args.serverIdent, ctx.getWhen());
         CodeReviewCommit result = args.mergeUtil.mergeOneCommit(myIdent,
             myIdent, args.repo, args.rw, args.inserter,
             args.canMergeFlag, args.destBranch, mergeTip.getCurrentTip(),

gerrit-server/src/main/java/com/google/gerrit/server/git/strategy/MergeAlways.java

@@ -43,11 +43,10 @@ public class MergeAlways extends SubmitStrategy {
     }
     while (!sorted.isEmpty()) {
       CodeReviewCommit mergedFrom = sorted.remove(0);
-      PersonIdent serverIdent = args.serverIdent.get();
       PersonIdent caller = args.caller.newCommitterIdent(
-          serverIdent.getWhen(), serverIdent.getTimeZone());
+          args.serverIdent.getWhen(), args.serverIdent.getTimeZone());
       CodeReviewCommit newTip =
-          args.mergeUtil.mergeOneCommit(caller, serverIdent,
+          args.mergeUtil.mergeOneCommit(caller, args.serverIdent,
               args.repo, args.rw, args.inserter, args.canMergeFlag,
               args.destBranch, mergeTip.getCurrentTip(), mergedFrom);
       mergeTip.moveTipTo(newTip, mergedFrom);

gerrit-server/src/main/java/com/google/gerrit/server/git/strategy/MergeIfNecessary.java

@@ -49,11 +49,10 @@ public class MergeIfNecessary extends SubmitStrategy {
     // For every other commit do a pair-wise merge.
     while (!sorted.isEmpty()) {
       CodeReviewCommit mergedFrom = sorted.remove(0);
-      PersonIdent serverIdent = args.serverIdent.get();
       PersonIdent caller = args.caller.newCommitterIdent(
-          serverIdent.getWhen(), serverIdent.getTimeZone());
+          args.serverIdent.getWhen(), args.serverIdent.getTimeZone());
       branchTip =
-          args.mergeUtil.mergeOneCommit(caller, serverIdent,
+          args.mergeUtil.mergeOneCommit(caller, args.serverIdent,
               args.repo, args.rw, args.inserter, args.canMergeFlag,
               args.destBranch, branchTip, mergedFrom);
       mergeTip.moveTipTo(branchTip, mergedFrom);

gerrit-server/src/main/java/com/google/gerrit/server/git/strategy/RebaseIfNecessary.java

@@ -38,7 +38,6 @@ import com.google.gerrit.server.project.NoSuchChangeException;
 import com.google.gwtorm.server.OrmException;
 
 import org.eclipse.jgit.lib.ObjectId;
-import org.eclipse.jgit.lib.PersonIdent;
 
 import java.io.IOException;
 import java.util.Collection;
@@ -164,7 +163,7 @@ public class RebaseIfNecessary extends SubmitStrategy {
             // Racy read of patch set is ok; see comments in RebaseChangeOp.
             args.db.patchSets().get(toMerge.getPatchsetId()),
             mergeTip.getCurrentTip().name())
-          .setCommitterIdent(args.serverIdent.get())
+          .setCommitterIdent(args.serverIdent)
           .setRunHooks(false)
           .setValidatePolicy(CommitValidators.Policy.NONE);
       try {
@@ -243,12 +242,11 @@ public class RebaseIfNecessary extends SubmitStrategy {
         mergeTip.moveTipTo(toMerge, toMerge);
         acceptMergeTip(mergeTip);
       } else {
-        PersonIdent myIdent = args.serverIdent.get();
         // TODO(dborowitz): Can't use repo from ctx due to canMergeFlag.
         CodeReviewCommit newTip = args.mergeUtil.mergeOneCommit(
-            myIdent, myIdent, args.repo, args.rw, args.inserter,
-            args.canMergeFlag, args.destBranch, mergeTip.getCurrentTip(),
-            toMerge);
+            args.serverIdent, args.serverIdent, args.repo, args.rw,
+            args.inserter, args.canMergeFlag, args.destBranch,
+            mergeTip.getCurrentTip(), toMerge);
         mergeTip.moveTipTo(newTip, toMerge);
       }
       args.mergeUtil.markCleanMerges(args.rw, args.canMergeFlag,

gerrit-server/src/main/java/com/google/gerrit/server/git/strategy/SubmitStrategy.java

@@ -30,7 +30,6 @@ import com.google.gerrit.server.git.MergeSorter;
 import com.google.gerrit.server.git.MergeTip;
 import com.google.gerrit.server.git.MergeUtil;
 import com.google.gerrit.server.project.ChangeControl;
-import com.google.inject.Provider;
 
 import org.eclipse.jgit.lib.ObjectInserter;
 import org.eclipse.jgit.lib.PersonIdent;
@@ -52,7 +51,7 @@ import java.util.Set;
  */
 public abstract class SubmitStrategy {
   static class Arguments {
-    protected final Provider<PersonIdent> serverIdent;
+    protected final PersonIdent serverIdent;
     protected final ReviewDb db;
     protected final BatchUpdate.Factory batchUpdateFactory;
     protected final ChangeControl.GenericFactory changeControlFactory;
@@ -68,7 +67,7 @@ public abstract class SubmitStrategy {
     protected final MergeSorter mergeSorter;
     protected final IdentifiedUser caller;
 
-    Arguments(Provider<PersonIdent> serverIdent, ReviewDb db,
+    Arguments(PersonIdent serverIdent, ReviewDb db,
         BatchUpdate.Factory batchUpdateFactory,
         ChangeControl.GenericFactory changeControlFactory, Repository repo,
         CodeReviewRevWalk rw, ObjectInserter inserter, RevFlag canMergeFlag,

gerrit-server/src/main/java/com/google/gerrit/server/git/strategy/SubmitStrategyFactory.java

@@ -86,7 +86,7 @@ public class SubmitStrategyFactory {
       throws IntegrationException, NoSuchProjectException {
     ProjectState project = getProject(destBranch);
     SubmitStrategy.Arguments args = new SubmitStrategy.Arguments(
-        myIdent, db, batchUpdateFactory, changeControlFactory,
+        myIdent.get(), db, batchUpdateFactory, changeControlFactory,
         repo, rw, inserter, canMergeFlag, alreadyAccepted,
         destBranch,approvalsUtil, mergeUtilFactory.create(project), caller);
     switch (submitType) {