Allow to schedule tasks directly with pg connection

src/queries.rs

@@ -7,7 +7,10 @@ use chrono::Duration;
 use chrono::Utc;
 use diesel::prelude::*;
 use diesel::ExpressionMethods;
-use diesel_async::{pg::AsyncPgConnection, RunQueryDsl};
+use diesel::query_builder::{Query, QueryFragment, QueryId};
+use diesel::sql_types::{HasSqlType, SingleValue};
+use diesel_async::return_futures::GetResult;
+use diesel_async::{pg::AsyncPgConnection, AsyncConnection, RunQueryDsl};
 
 impl Task {
     pub(crate) async fn remove(

src/queue.rs

@@ -25,7 +25,7 @@ where
     {
         // TODO: Add option to specify the timeout of a task
         self.task_store
-            .create_task(NewTask::new(background_task, Duration::from_secs(10))?)
+            .create_task(NewTask::with_timeout(background_task, Duration::from_secs(10))?)
             .await?;
         Ok(())
     }

src/store.rs

@@ -1,5 +1,7 @@
 use crate::errors::AsyncQueueError;
 use crate::task::{NewTask, Task, TaskId, TaskState};
+use crate::BackgroundTask;
+use async_trait::async_trait;
 use diesel::result::Error::QueryBuilderError;
 use diesel_async::scoped_futures::ScopedFutureExt;
 use diesel_async::AsyncConnection;
@@ -17,6 +19,23 @@ impl PgTaskStore {
     }
 }
 
+/// A trait that is used to enqueue tasks for the PostgreSQL backend.
+#[async_trait::async_trait]
+pub trait PgQueueTask {
+    async fn enqueue(self, connection: &mut AsyncPgConnection) -> Result<(), AsyncQueueError>;
+}
+
+impl<T> PgQueueTask for T
+where
+    T: BackgroundTask,
+{
+    async fn enqueue(self, connection: &mut AsyncPgConnection) -> Result<(), AsyncQueueError> {
+        let new_task = NewTask::new::<T>(self)?;
+        Task::insert(connection, new_task).await?;
+        Ok(())
+    }
+}
+
 #[async_trait::async_trait]
 impl TaskStore for PgTaskStore {
     async fn pull_next_task(

src/task.rs

@@ -117,7 +117,7 @@ pub struct NewTask {
 }
 
 impl NewTask {
-    pub(crate) fn new<T>(background_task: T, timeout: Duration) -> Result<Self, serde_json::Error>
+    pub(crate) fn with_timeout<T>(background_task: T, timeout: Duration) -> Result<Self, serde_json::Error>
         where
             T: BackgroundTask,
     {
@@ -134,6 +134,13 @@ impl NewTask {
             max_retries,
         })
     }
+
+    pub(crate) fn new<T>(background_task: T) -> Result<Self, serde_json::Error>
+    where
+        T: BackgroundTask,
+    {
+        Self::with_timeout(background_task, Duration::from_secs(120))
+    }
 }
 
 #[cfg(test)]