feat: manual compact api (#1912)

* merge develop

* chore: merge develop

* fix: some cr commentx

* fix: cr comments

src/store-api/src/storage.rs

@@ -37,7 +37,9 @@ pub use self::engine::{
     TwcsOptions,
 };
 pub use self::metadata::RegionMeta;
-pub use self::region::{CloseContext, FlushContext, FlushReason, Region, RegionStat, WriteContext};
+pub use self::region::{
+    CloseContext, CompactContext, FlushContext, FlushReason, Region, RegionStat, WriteContext,
+};
 pub use self::requests::{
     AddColumn, AlterOperation, AlterRequest, GetRequest, ScanRequest, WriteRequest,
 };

src/store-api/src/storage/region.rs

@@ -86,6 +86,8 @@ pub trait Region: Send + Sync + Clone + std::fmt::Debug + 'static {
 
     /// Flush memtable of the region to disk.
     async fn flush(&self, ctx: &FlushContext) -> Result<(), Self::Error>;
+
+    async fn compact(&self, ctx: &CompactContext) -> Result<(), Self::Error>;
 }
 
 #[derive(Default, Debug)]
@@ -132,6 +134,18 @@ impl Default for FlushContext {
     }
 }
 
+#[derive(Debug, Copy, Clone)]
+pub struct CompactContext {
+    /// Whether to wait the compaction result.
+    pub wait: bool,
+}
+
+impl Default for CompactContext {
+    fn default() -> CompactContext {
+        CompactContext { wait: true }
+    }
+}
+
 /// Reason of flush operation.
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum FlushReason {