reintroduce "get existing store" behavior for create_or_load

Author: lucasfernog

plugins/store/guest-js/index.ts

@@ -46,7 +46,11 @@ export async function create(
 }
 
 /**
- * Create a new Store or load the existing store with the path
+ * Create a new Store or load the existing store with the path.
+ *
+ * If the store at the given path is already loaded,
+ * its instance is returned regardless of the options object.
+ * If the settings to not match an error is returned.
  *
  * @param path Path to save the store in `app_data_dir`
  * @param options Store configuration options

plugins/store/src/lib.rs

@@ -299,7 +299,9 @@ pub trait StoreExt<R: Runtime> {
     /// Get a handle of an already loaded store.
     ///
     /// If the store is not loaded or does not exist, it returns `None`.
-    /// In this case, you should initialize it with [`Self::store`].
+    ///
+    /// Note that using this function can cause race conditions if you fallback to creating or loading the store,
+    /// so you should consider using [`Self::store`] if you are not sure if the store is loaded or not.
     ///
     /// # Examples
     ///
@@ -312,6 +314,9 @@ pub trait StoreExt<R: Runtime> {
     ///     let store = if let Some(s) = app.get_store("store.json") {
     ///       s
     ///     } else {
+    ///       // this is not thread safe; if another thread is doing the same load/create,
+    ///       // there will be a race condition; in this case we could remove the get_store
+    ///       // and only run app.store() as it will return the existing store if it has been loaded
     ///       app.store("store.json")?
     ///     };
     ///     Ok(())
@@ -323,9 +328,6 @@ pub trait StoreExt<R: Runtime> {
 impl<R: Runtime, T: Manager<R>> StoreExt<R> for T {
     fn store(&self, path: impl AsRef<Path>) -> Result<Arc<Store<R>>> {
         let path = path.as_ref();
-        if let Some(store) = self.get_store(path) {
-            return Ok(store);
-        }
         StoreBuilder::new(self.app_handle(), path).create_or_load()
     }
 

plugins/store/src/store.rs

@@ -230,7 +230,11 @@ impl<R: Runtime> StoreBuilder<R> {
         self.build_inner(false)
     }
 
-    /// Get the existing store with the same path or creates a new [`Store`], also see [`create`](Self::create).
+    /// Get the existing store with the same path or creates a new [`Store`].
+    ///
+    /// If a store with the same path has already been loaded its instance is returned.
+    ///
+    /// See [`create`](Self::create) if you want to force create a new store in the path.
     ///
     /// # Examples
     /// ```
@@ -247,6 +251,13 @@ impl<R: Runtime> StoreBuilder<R> {
     }
 
     pub(crate) fn create_or_load_inner(self) -> crate::Result<(Arc<Store<R>>, ResourceId)> {
+        {
+            let state = self.app.state::<StoreState>();
+            let stores = state.stores.lock().unwrap();
+            if let Some(rid) = stores.get(&self.path) {
+                return Ok((self.app.resources_table().get(*rid).unwrap(), *rid));
+            }
+        }
         self.build_inner(true)
     }
 }