add key abstraction and prepare for MVCC (#28)

* add key abstraction and prepare for MVCC Signed-off-by: Alex Chi <iskyzh@gmail.com> * a little bit type exercise Signed-off-by: Alex Chi <iskyzh@gmail.com> * refactor tests Signed-off-by: Alex Chi <iskyzh@gmail.com> * fix clippy warnings Signed-off-by: Alex Chi <iskyzh@gmail.com> * refactor starter code Signed-off-by: Alex Chi <iskyzh@gmail.com> * final touch docs Signed-off-by: Alex Chi <iskyzh@gmail.com> --------- Signed-off-by: Alex Chi <iskyzh@gmail.com>
2024-01-25 10:59:08 +08:00
parent 2fefe3e505
commit a3a92359e1
42 changed files with 824 additions and 281 deletions
--- a/mini-lsm-starter/src/mem_table.rs
+++ b/mini-lsm-starter/src/mem_table.rs
@@ -11,6 +11,7 @@ use crossbeam_skiplist::SkipMap;
 use ouroboros::self_referencing;

 use crate::iterators::StorageIterator;
+use crate::key::KeySlice;
 use crate::table::SsTableBuilder;
 use crate::wal::Wal;

@@ -115,11 +116,13 @@ pub struct MemTableIterator {
 }

 impl StorageIterator for MemTableIterator {
+    type KeyType<'a> = KeySlice<'a>;
+
    fn value(&self) -> &[u8] {
        unimplemented!()
    }

-    fn key(&self) -> &[u8] {
+    fn key(&self) -> KeySlice {
        unimplemented!()
    }