SERVER-18929: Compute available space for output docs in CommandReplyBuilder

1 files changed, 7 insertions, 0 deletions

diff --git a/src/mongo/rpc/legacy_reply_builder.cpp b/src/mongo/rpc/legacy_reply_builder.cpp
index e95c6ceff8b..0712c0d5fee 100644
--- a/src/mongo/rpc/legacy_reply_builder.cpp
+++ b/src/mongo/rpc/legacy_reply_builder.cpp
@@ -98,6 +98,7 @@ namespace rpc {
         _state = State::kMetadata;
     }
 
+
     std::unique_ptr<Message> LegacyReplyBuilder::done() {
         invariant(_state == State::kOutputDocs);
         std::unique_ptr<Message> message = stdx::make_unique<Message>();
@@ -117,5 +118,11 @@ namespace rpc {
         return std::move(message);
     }
 
+    std::size_t LegacyReplyBuilder::availableSpaceForOutputDocs() const {
+        invariant (State::kDone != _state);
+        // LegacyReplyBuilder currently does not support addOutputDoc(s)
+        return 0u;
+    }
+
 }  // namespace rpc
 }  // namespace mongo