SERVER-49907 Unroll applyOps entry and do resharding CRUD application.

Introduces a ReshardingOplogBatchPreparer class for creating writer
vectors. Also splits batch application in resharding's oplog application
into a first phase of CRUD application and a second phase of session
application.

1 files changed, 7 insertions, 1 deletions

diff --git a/src/mongo/db/repl/oplog_entry.h b/src/mongo/db/repl/oplog_entry.h
index b901c4ae291..e093b526a3c 100644
--- a/src/mongo/db/repl/oplog_entry.h
+++ b/src/mongo/db/repl/oplog_entry.h
@@ -491,6 +491,9 @@ public:
     void setPostImageOp(std::shared_ptr<DurableOplogEntry> postImageOp);
     void setPostImageOp(const BSONObj& postImageOp);
 
+    bool isForReshardingSessionApplication() const;
+    void setIsForReshardingSessionApplication(bool isForReshardingSessionApplication = true);
+
     std::string toStringForLogging() const;
 
     /**
@@ -543,12 +546,15 @@ public:
 private:
     DurableOplogEntry _entry;
 
-    boost::optional<bool> _isForCappedCollection;
 
     // We use std::shared_ptr<DurableOplogEntry> rather than boost::optional<DurableOplogEntry> here
     // so that OplogEntries are cheaper to copy.
     std::shared_ptr<DurableOplogEntry> _preImageOp;
     std::shared_ptr<DurableOplogEntry> _postImageOp;
+
+    bool _isForCappedCollection = false;
+
+    bool _isForReshardingSessionApplication = false;
 };
 
 std::ostream& operator<<(std::ostream& s, const DurableOplogEntry& o);