Update review idea

Signed-off-by: Manjusaka <[email protected]>

core/src/services/sqlite/backend.rs

@@ -21,6 +21,7 @@ use std::fmt::Formatter;
 
 use async_trait::async_trait;
 use rusqlite::{params, Connection};
+use tokio::task;
 
 use crate::raw::adapters::kv;
 use crate::raw::*;
@@ -56,12 +57,11 @@ impl SqliteBuilder {
     ///
     /// ## Url
     ///
-    /// This format resembles the url format of the sqlite client. The format is: [scheme://][user[:[password]]@]host[:port][/schema][?attribute1=value1&attribute2=value2...
+    /// This format resembles the url format of the sqlite client. The format is: file://[path]?flag
     ///
     /// - `file://data.db`
     ///
     /// For more information, please refer to [Opening A New Database Connection](http://www.sqlite.org/c3ref/open.html)
-    ///
     pub fn connection_string(&mut self, v: &str) -> &mut Self {
         if !v.is_empty() {
             self.connection_string = Some(v.to_string());
@@ -204,54 +204,68 @@ impl kv::Adapter for Adapter {
     }
 
     async fn get(&self, path: &str) -> Result<Option<Vec<u8>>> {
+        task::spawn_blocking(move || {
+            self.blocking_get(path);
+        })
+        .await
+        .unwrap();
+    }
+
+    fn blocking_get(&self, path: &str) -> Result<Option<Vec<u8>>> {
         let query = format!(
             "SELECT {} FROM {} WHERE `{}` = $1 LIMIT 1",
             self.value_field, self.table, self.key_field
         );
-        let conn = Connection::open(self.connection_string.clone()).map_err(|err| {
-            Error::new(ErrorKind::Unexpected, "Sqlite open error").set_source(err)
-        })?;
-        let mut statement = conn.prepare(&query).map_err(|err| {
-            Error::new(ErrorKind::Unexpected, "Sqlite prepared query error").set_source(err)
-        })?;
+        let conn = Connection::open(self.connection_string.clone()).map_err(|err| Error::from)?;
+        let mut statement = conn.prepare(&query).map_err(|err| Error::from)?;
         let result = statement.query_row(&[path], |row| Ok(row.get(0)?));
         match result {
             Ok(v) => Ok(Some(v)),
             Err(rusqlite::Error::QueryReturnedNoRows) => Ok(None),
-            Err(err) => {
-                Err(Error::new(ErrorKind::Unexpected, "Sqlite query error").set_source(err))
-            }
+            Err(err) => Error::from,
         }
     }
 
     async fn set(&self, path: &str, value: &[u8]) -> Result<()> {
+        task::spawn_blocking(move || {
+            self.blocking_set(path, value);
+        })
+        .await
+        .unwrap();
+    }
+
+    fn blocking_set(&self, path: &str, value: &[u8]) -> Result<()> {
         let query = format!(
             "INSERT OR REPLACE INTO `{}` (`{}`, `{}`) VALUES ($1, $2)",
             self.table, self.key_field, self.value_field
         );
-        let conn = Connection::open(self.connection_string.clone()).map_err(|err| {
-            Error::new(ErrorKind::Unexpected, "Sqlite open error").set_source(err)
-        })?;
-        let mut statement = conn.prepare(&query).map_err(|err| {
-            Error::new(ErrorKind::Unexpected, "Sqlite prepared query error").set_source(err)
-        })?;
-        statement.execute(params![path, value]).map_err(|err| {
-            Error::new(ErrorKind::Unexpected, "Sqlite qupdate error").set_source(err)
-        })?;
+        let conn = Connection::open(self.connection_string.clone()).map_err(|err| Error::from)?;
+        let mut statement = conn.prepare(&query).map_err(|err| Error::from)?;
+        statement
+            .execute(params![path, value])
+            .map_err(|err| Error::from)?;
         Ok(())
     }
 
     async fn delete(&self, path: &str) -> Result<()> {
-        let conn = Connection::open(self.connection_string.clone()).map_err(|err| {
-            Error::new(ErrorKind::Unexpected, "Sqlite open error").set_source(err)
-        })?;
+        task::spawn_blocking(move || {
+            self.blocking_delete(path);
+        })
+        .await
+        .unwrap();
+    }
+
+    fn blocking_delete(&self, path: &str) -> Result<()> {
+        let conn = Connection::open(self.connection_string.clone()).map_err(|err| Error::from)?;
         let query = format!("DELETE FROM {} WHERE `{}` = $1", self.table, self.key_field);
-        let mut statement = conn.prepare(&query).map_err(|err| {
-            Error::new(ErrorKind::Unexpected, "Sqlite prepared error").set_source(err)
-        })?;
-        statement.execute(&[path]).map_err(|err| {
-            Error::new(ErrorKind::Unexpected, "Sqlite delete error").set_source(err)
-        })?;
+        let mut statement = conn.prepare(&query).map_err(|err| Error::from)?;
+        statement.execute(&[path]).map_err(|err| Error::from)?;
         Ok(())
     }
 }
+
+impl From<rusqlite::Error> for Error {
+    fn from(err: rusqlite::Error) -> Self {
+        Error::new(ErrorKind::Unexpected, "Sqlite error").set_source(err)
+    }
+}