Index start/activate commands: fix Elastic support

Before this fix, the IndexStartCommand and IndexActivateCommand worked
only for the Lucene index-type case. Replace the latter hard-coded case
with support for it but also the Elastic case as well. Meaning, use
AbstractVersionManager rather than its LuceneVersionManager sub-type, so
that ElasticVersionManager can also be (seamlessly) supported for those
commands. Hence bind AbstractVersionManager to the configured sub-type
class, in order for it to be used that way.

This change can be fully tested through using the --force option of the
gerrit index start command [1]. The gerrit index activate command [2]
does not have such an option.

[1] https://gerrit-review.googlesource.com/Documentation/cmd-index-start.html
[2] https://gerrit-review.googlesource.com/Documentation/cmd-index-activate.html

Bug: Issue 8584, Issue 8585
Change-Id: Ibd8d22dca3a94e8b6a81db2935d1c34b1e80401d

gerrit-elasticsearch/src/main/java/com/google/gerrit/elasticsearch/ElasticIndexModule.java

@@ -16,6 +16,7 @@ package com.google.gerrit.elasticsearch;
 
 import com.google.gerrit.lifecycle.LifecycleModule;
 import com.google.gerrit.server.config.GerritServerConfig;
+import com.google.gerrit.server.index.AbstractVersionManager;
 import com.google.gerrit.server.index.IndexConfig;
 import com.google.gerrit.server.index.IndexModule;
 import com.google.gerrit.server.index.SingleVersionModule;
@@ -67,6 +68,7 @@ public class ElasticIndexModule extends LifecycleModule {
     } else {
       install(new SingleVersionModule(singleVersions));
     }
+    bind(AbstractVersionManager.class).to(ElasticVersionManager.class);
   }
 
   @Provides

gerrit-lucene/src/main/java/com/google/gerrit/lucene/LuceneIndexModule.java

@@ -17,6 +17,7 @@ package com.google.gerrit.lucene;
 import com.google.common.collect.ImmutableMap;
 import com.google.gerrit.lifecycle.LifecycleModule;
 import com.google.gerrit.server.config.GerritServerConfig;
+import com.google.gerrit.server.index.AbstractVersionManager;
 import com.google.gerrit.server.index.IndexConfig;
 import com.google.gerrit.server.index.IndexModule;
 import com.google.gerrit.server.index.SingleVersionModule;
@@ -77,6 +78,7 @@ public class LuceneIndexModule extends LifecycleModule {
     } else {
       install(new SingleVersionModule(singleVersions));
     }
+    bind(AbstractVersionManager.class).to(LuceneVersionManager.class);
   }
 
   @Provides

gerrit-sshd/src/main/java/com/google/gerrit/sshd/commands/IndexActivateCommand.java

@@ -16,7 +16,7 @@ package com.google.gerrit.sshd.commands;
 
 import com.google.gerrit.common.data.GlobalCapability;
 import com.google.gerrit.extensions.annotations.RequiresCapability;
-import com.google.gerrit.lucene.LuceneVersionManager;
+import com.google.gerrit.server.index.AbstractVersionManager;
 import com.google.gerrit.server.index.ReindexerAlreadyRunningException;
 import com.google.gerrit.sshd.CommandMetaData;
 import com.google.gerrit.sshd.SshCommand;
@@ -30,12 +30,12 @@ public class IndexActivateCommand extends SshCommand {
   @Argument(index = 0, required = true, metaVar = "INDEX", usage = "index name to activate")
   private String name;
 
-  @Inject private LuceneVersionManager luceneVersionManager;
+  @Inject private AbstractVersionManager versionManager;
 
   @Override
   protected void run() throws UnloggedFailure {
     try {
-      if (luceneVersionManager.activateLatestIndex(name)) {
+      if (versionManager.activateLatestIndex(name)) {
         stdout.println("Activated latest index version");
       } else {
         stdout.println("Not activating index, already using latest version");

gerrit-sshd/src/main/java/com/google/gerrit/sshd/commands/IndexStartCommand.java

@@ -16,7 +16,7 @@ package com.google.gerrit.sshd.commands;
 
 import com.google.gerrit.common.data.GlobalCapability;
 import com.google.gerrit.extensions.annotations.RequiresCapability;
-import com.google.gerrit.lucene.LuceneVersionManager;
+import com.google.gerrit.server.index.AbstractVersionManager;
 import com.google.gerrit.server.index.ReindexerAlreadyRunningException;
 import com.google.gerrit.sshd.CommandMetaData;
 import com.google.gerrit.sshd.SshCommand;
@@ -34,12 +34,12 @@ public class IndexStartCommand extends SshCommand {
   @Argument(index = 0, required = true, metaVar = "INDEX", usage = "index name to start")
   private String name;
 
-  @Inject private LuceneVersionManager luceneVersionManager;
+  @Inject private AbstractVersionManager versionManager;
 
   @Override
   protected void run() throws UnloggedFailure {
     try {
-      if (luceneVersionManager.startReindexer(name, force)) {
+      if (versionManager.startReindexer(name, force)) {
         stdout.println("Reindexer started");
       } else {
         stdout.println("Nothing to reindex, index is already the latest version");