move main engine in worker

src/database/client.rs

@@ -5,6 +5,8 @@ use diesel::r2d2::ConnectionManager;
 use lazy_static::lazy_static;
 
 type Pool = r2d2::Pool<ConnectionManager<PgConnection>>;
+
+#[allow(dead_code)]
 pub type DbConnection = r2d2::PooledConnection<ConnectionManager<PgConnection>>;
 
 lazy_static! {
@@ -19,6 +21,7 @@ pub fn init_database_pool() {
     lazy_static::initialize(&POOL);
 }
 
+#[allow(dead_code)]
 pub fn get_connection() -> Result<DbConnection, String> {
     match POOL.get() {
         Ok(conn) => Ok(conn),

src/database/mod.rs

@@ -1,3 +1,3 @@
 mod client;
 
-pub use client::{get_connection, init_database_pool};
+pub use client::init_database_pool;