wip: split out layout management from System into separate LayoutManager

src/model/k2v/rpc.rs

@@ -131,7 +131,7 @@ impl K2VRpcHandler {
 		who.sort();
 
 		self.system
-			.rpc
+			.rpc_helper()
 			.try_call_many(
 				&self.endpoint,
 				&who[..],
@@ -187,7 +187,7 @@ impl K2VRpcHandler {
 		let call_futures = call_list.into_iter().map(|(nodes, items)| async move {
 			let resp = self
 				.system
-				.rpc
+				.rpc_helper()
 				.try_call_many(
 					&self.endpoint,
 					&nodes[..],
@@ -229,7 +229,7 @@ impl K2VRpcHandler {
 			.replication
 			.write_nodes(&poll_key.partition.hash());
 
-		let rpc = self.system.rpc.try_call_many(
+		let rpc = self.system.rpc_helper().try_call_many(
 			&self.endpoint,
 			&nodes[..],
 			K2VRpc::PollItem {
@@ -241,7 +241,8 @@ impl K2VRpcHandler {
 				.with_quorum(self.item_table.data.replication.read_quorum())
 				.without_timeout(),
 		);
-		let timeout_duration = Duration::from_millis(timeout_msec) + self.system.rpc.rpc_timeout();
+		let timeout_duration =
+			Duration::from_millis(timeout_msec) + self.system.rpc_helper().rpc_timeout();
 		let resps = select! {
 			r = rpc => r?,
 			_ = tokio::time::sleep(timeout_duration) => return Ok(None),
@@ -300,7 +301,11 @@ impl K2VRpcHandler {
 		let rs = RequestStrategy::with_priority(PRIO_NORMAL).without_timeout();
 		let mut requests = nodes
 			.iter()
-			.map(|node| self.system.rpc.call(&self.endpoint, *node, msg.clone(), rs))
+			.map(|node| {
+				self.system
+					.rpc_helper()
+					.call(&self.endpoint, *node, msg.clone(), rs)
+			})
 			.collect::<FuturesUnordered<_>>();
 
 		// Fetch responses. This procedure stops fetching responses when any of the following
@@ -316,8 +321,9 @@ impl K2VRpcHandler {
 		// kind: all items produced by that node until time ts have been returned, so we can
 		// bump the entry in the global vector clock and possibly remove some item-specific
 		// vector clocks)
-		let mut deadline =
-			Instant::now() + Duration::from_millis(timeout_msec) + self.system.rpc.rpc_timeout();
+		let mut deadline = Instant::now()
+			+ Duration::from_millis(timeout_msec)
+			+ self.system.rpc_helper().rpc_timeout();
 		let mut resps = vec![];
 		let mut errors = vec![];
 		loop {