Add `ldb multi_get_entity` subcommand (#12593)

Summary:
Mixed code from `MultiGetCommand` and `GetEntityCommand` to introduce `MultiGetEntityCommand`. Some minor fixes for the related subcommands are included.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/12593

Reviewed By: jaykorean

Differential Revision: D56687147

Pulled By: ajkr

fbshipit-source-id: 2ad7b7ba8e05e990b43f2d1eb4990f746ce5f1ea

1 files changed, 16 insertions, 0 deletions

diff --git a/tools/ldb_cmd_impl.h b/tools/ldb_cmd_impl.h
index e5d0d1fe9..15ff571b2 100644
--- a/tools/ldb_cmd_impl.h
+++ b/tools/ldb_cmd_impl.h
@@ -435,6 +435,22 @@ class GetEntityCommand : public LDBCommand {
   std::string key_;
 };
 
+class MultiGetEntityCommand : public LDBCommand {
+ public:
+  static std::string Name() { return "multi_get_entity"; }
+
+  MultiGetEntityCommand(const std::vector<std::string>& params,
+                        const std::map<std::string, std::string>& options,
+                        const std::vector<std::string>& flags);
+
+  void DoCommand() override;
+
+  static void Help(std::string& ret);
+
+ private:
+  std::vector<std::string> keys_;
+};
+
 class ApproxSizeCommand : public LDBCommand {
  public:
   static std::string Name() { return "approxsize"; }