layou: implement ack locking

src/table/replication/parameters.rs

@@ -3,6 +3,8 @@ use garage_util::data::*;
 
 /// Trait to describe how a table shall be replicated
 pub trait TableReplication: Send + Sync + 'static {
+	type WriteSets: AsRef<Vec<Vec<Uuid>>> + Send + Sync + 'static;
+
 	// See examples in table_sharded.rs and table_fullcopy.rs
 	// To understand various replication methods
 
@@ -15,7 +17,7 @@ pub trait TableReplication: Send + Sync + 'static {
 	fn read_quorum(&self) -> usize;
 
 	/// Which nodes to send writes to
-	fn write_sets(&self, hash: &Hash) -> Vec<Vec<Uuid>>;
+	fn write_sets(&self, hash: &Hash) -> Self::WriteSets;
 	/// Responses needed to consider a write succesfull in each set
 	fn write_quorum(&self) -> usize;
 	fn max_write_errors(&self) -> usize;