93 lines
2.5 KiB
Rust
93 lines
2.5 KiB
Rust
use crate::async_queue::AsyncQueueError;
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use crate::asynk::async_queue::AsyncQueueable;
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use crate::FangError;
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use crate::Scheduled;
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use async_trait::async_trait;
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use bb8_postgres::bb8::RunError;
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use bb8_postgres::tokio_postgres::Error as TokioPostgresError;
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use serde_json::Error as SerdeError;
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const COMMON_TYPE: &str = "common";
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pub const RETRIES_NUMBER: i32 = 20;
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impl From<AsyncQueueError> for FangError {
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fn from(error: AsyncQueueError) -> Self {
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let message = format!("{error:?}");
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FangError {
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description: message,
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}
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}
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}
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impl From<TokioPostgresError> for FangError {
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fn from(error: TokioPostgresError) -> Self {
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Self::from(AsyncQueueError::PgError(error))
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}
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}
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impl From<RunError<TokioPostgresError>> for FangError {
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fn from(error: RunError<TokioPostgresError>) -> Self {
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Self::from(AsyncQueueError::PoolError(error))
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}
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}
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impl From<SerdeError> for FangError {
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fn from(error: SerdeError) -> Self {
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Self::from(AsyncQueueError::SerdeError(error))
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}
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}
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/// Implement this trait to run your custom tasks.
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#[typetag::serde(tag = "type")]
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#[async_trait]
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pub trait AsyncRunnable: Send + Sync {
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/// Execute the task. This method should define its logic
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async fn run(&self, client: &mut dyn AsyncQueueable) -> Result<(), FangError>;
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/// Define the type of the task.
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/// The `common` task type is used by default
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fn task_type(&self) -> String {
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COMMON_TYPE.to_string()
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}
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/// If set to true, no new tasks with the same metadata will be inserted
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/// By default it is set to false.
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fn uniq(&self) -> bool {
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false
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}
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/// This method defines if a task is periodic or it should be executed once in the future.
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///
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/// Be careful it works only with the UTC timezone.
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///
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///
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/// Example:
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///
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///
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/**
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```rust
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fn cron(&self) -> Option<Scheduled> {
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let expression = "0/20 * * * Aug-Sep * 2022/1";
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Some(Scheduled::CronPattern(expression.to_string()))
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}
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```
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*/
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/// In order to schedule a task once, use the `Scheduled::ScheduleOnce` enum variant.
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fn cron(&self) -> Option<Scheduled> {
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None
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}
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/// Define the maximum number of retries the task will be retried.
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/// By default the number of retries is 20.
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fn max_retries(&self) -> i32 {
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RETRIES_NUMBER
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}
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/// Define the backoff mode
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/// By default, it is exponential, 2^(attempt)
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fn backoff(&self, attempt: u32) -> u32 {
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u32::pow(2, attempt)
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}
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}
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