feat: init and define database ops as interfaces to support multiple DBs

db/db-core/src/errors.rs

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2022  Aravinth Manivannan <realaravinth@batsense.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+//! represents all the ways a trait can fail using this crate
+use std::error::Error as StdError;
+
+//use derive_more::{error, Error as DeriveError};
+use thiserror::Error;
+
+/// Error data structure grouping various error subtypes
+#[derive(Debug, Error)]
+pub enum DBError {
+    /// errors that are specific to a database implementation
+    #[error("{0}")]
+    DBError(#[source] BoxDynError),
+}
+
+/// Convenience type alias for grouping driver-specific errors
+pub type BoxDynError = Box<dyn StdError + 'static + Send + Sync>;
+
+/// Generic result data structure
+pub type DBResult<V> = std::result::Result<V, DBError>;