use a trait object for the server, for dynamic dispatch

sync-server/src/api/add_version.rs

@@ -1,8 +1,7 @@
-use crate::server::SyncServer;
+use crate::api::ServerState;
 use crate::types::{ClientId, HistorySegment, VersionId};
 use actix_web::{error, http::StatusCode, post, web, HttpResponse, Responder, Result};
 use serde::{Deserialize, Serialize};
-use std::sync::Arc;
 
 /// Request body to add_version
 #[derive(Serialize, Deserialize)]
@@ -14,7 +13,7 @@ pub(crate) struct AddVersionRequest {
 
 #[post("/client/{client_id}/add-version/{parent_version_id}")]
 pub(crate) async fn service(
-    data: web::Data<Arc<SyncServer>>,
+    data: web::Data<ServerState>,
     web::Path((client_id, parent_version_id)): web::Path<(ClientId, VersionId)>,
     body: web::Json<AddVersionRequest>,
 ) -> Result<impl Responder> {

sync-server/src/api/get_child_version.rs

@@ -1,11 +1,10 @@
-use crate::server::SyncServer;
+use crate::api::ServerState;
 use crate::types::{ClientId, VersionId};
 use actix_web::{error, get, http::StatusCode, web, HttpResponse, Result};
-use std::sync::Arc;
 
 #[get("/client/{client_id}/get-child-version/{parent_version_id}")]
 pub(crate) async fn service(
-    data: web::Data<Arc<SyncServer>>,
+    data: web::Data<ServerState>,
     web::Path((client_id, parent_version_id)): web::Path<(ClientId, VersionId)>,
 ) -> Result<HttpResponse> {
     let result = data

sync-server/src/api/mod.rs

@@ -1,2 +1,8 @@
+use crate::server::SyncServer;
+use std::sync::Arc;
+
 pub(crate) mod add_version;
 pub(crate) mod get_child_version;
+
+/// The type containing a reference to the SyncServer object in the Actix state.
+pub(crate) type ServerState = Arc<Box<dyn SyncServer>>;