Generic database

src/collection/mod.rs

@@ -56,15 +56,15 @@ pub trait CollectionManager {
 
 /// The collection manager. It is responsible for pulling information from both the library and the
 /// database, ensuring its consistent and writing back any changes.
-pub struct MhCollectionManager<L> {
+pub struct MhCollectionManager<L, D> {
     library: L,
-    database: Box<dyn Database + Send + Sync>,
+    database: D,
     collection: Collection,
 }
 
-impl<L: Library> MhCollectionManager<L> {
+impl<L: Library, D: Database> MhCollectionManager<L, D> {
     /// Create a new [`CollectionManager`] with the provided [`Library`] and [`Database`].
-    pub fn new(library: L, database: Box<dyn Database + Send + Sync>) -> Self {
+    pub fn new(library: L, database: D) -> Self {
         MhCollectionManager {
             library,
             database,
@@ -73,7 +73,7 @@ impl<L: Library> MhCollectionManager<L> {
     }
 }
 
-impl<L: Library> CollectionManager for MhCollectionManager<L> {
+impl<L: Library, D: Database> CollectionManager for MhCollectionManager<L, D> {
     fn rescan_library(&mut self) -> Result<(), Error> {
         self.collection = self.library.list(&Query::default())?;
         Ok(())
@@ -124,7 +124,7 @@ mod tests {
             .times(1)
             .return_once(|_| database_result);
 
-        let mut collection_manager = MhCollectionManager::new(library, Box::new(database));
+        let mut collection_manager = MhCollectionManager::new(library, database);
 
         collection_manager.rescan_library().unwrap();
         assert_eq!(collection_manager.get_collection(), &*COLLECTION);
@@ -143,7 +143,7 @@ mod tests {
             .times(1)
             .return_once(|_| library_result);
 
-        let mut collection_manager = MhCollectionManager::new(library, Box::new(database));
+        let mut collection_manager = MhCollectionManager::new(library, database);
 
         let actual_err = collection_manager.rescan_library().unwrap_err();
         let expected_err = Error::LibraryError(
@@ -166,7 +166,7 @@ mod tests {
             .times(1)
             .return_once(|_| database_result);
 
-        let mut collection_manager = MhCollectionManager::new(library, Box::new(database));
+        let mut collection_manager = MhCollectionManager::new(library, database);
 
         let actual_err = collection_manager.save_to_database().unwrap_err();
         let expected_err =

src/main.rs

@@ -49,7 +49,7 @@ fn main() {
         &opt.database_file_path,
     )));
 
-    let collection_manager = MhCollectionManager::new(beets, Box::new(database));
+    let collection_manager = MhCollectionManager::new(beets, database);
 
     // Initialize the terminal user interface.
     let backend = CrosstermBackend::new(io::stdout());