mirror of
https://github.com/denoland/deno.git
synced 2024-12-30 11:16:38 -05:00
01d3e0f317
This PR adds unstable `Deno.cron` API to trigger execution of cron jobs. * State: All cron state is in memory. Cron jobs are scheduled according to the cron schedule expression and the current time. No state is persisted to disk. * Time zone: Cron expressions specify time in UTC. * Overlapping executions: not permitted. If the next scheduled execution time occurs while the same cron job is still executing, the scheduled execution is skipped. * Retries: failed jobs are automatically retried until they succeed or until retry threshold is reached. Retry policy can be optionally specified using `options.backoffSchedule`.
128 lines
2.8 KiB
Rust
128 lines
2.8 KiB
Rust
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
|
|
|
|
mod interface;
|
|
pub mod local;
|
|
mod time;
|
|
|
|
use std::borrow::Cow;
|
|
use std::cell::RefCell;
|
|
use std::rc::Rc;
|
|
|
|
use deno_core::error::get_custom_error_class;
|
|
use deno_core::error::type_error;
|
|
use deno_core::error::AnyError;
|
|
use deno_core::op2;
|
|
use deno_core::OpState;
|
|
use deno_core::Resource;
|
|
use deno_core::ResourceId;
|
|
|
|
pub use crate::interface::*;
|
|
|
|
pub const UNSTABLE_FEATURE_NAME: &str = "cron";
|
|
|
|
deno_core::extension!(deno_cron,
|
|
deps = [ deno_console ],
|
|
parameters = [ C: CronHandler ],
|
|
ops = [
|
|
op_cron_create<C>,
|
|
op_cron_next<C>,
|
|
],
|
|
esm = [ "01_cron.ts" ],
|
|
options = {
|
|
cron_handler: C,
|
|
},
|
|
state = |state, options| {
|
|
state.put(Rc::new(options.cron_handler));
|
|
}
|
|
);
|
|
|
|
struct CronResource<EH: CronHandle + 'static> {
|
|
handle: Rc<EH>,
|
|
}
|
|
|
|
impl<EH: CronHandle + 'static> Resource for CronResource<EH> {
|
|
fn name(&self) -> Cow<str> {
|
|
"cron".into()
|
|
}
|
|
|
|
fn close(self: Rc<Self>) {
|
|
self.handle.close();
|
|
}
|
|
}
|
|
|
|
#[op2]
|
|
#[smi]
|
|
fn op_cron_create<C>(
|
|
state: Rc<RefCell<OpState>>,
|
|
#[string] name: String,
|
|
#[string] cron_schedule: String,
|
|
#[serde] backoff_schedule: Option<Vec<u32>>,
|
|
) -> Result<ResourceId, AnyError>
|
|
where
|
|
C: CronHandler + 'static,
|
|
{
|
|
let cron_handler = {
|
|
let state = state.borrow();
|
|
// TODO(bartlomieju): replace with `state.feature_checker.check_or_exit`
|
|
// once we phase out `check_or_exit_with_legacy_fallback`
|
|
state
|
|
.feature_checker
|
|
.check_or_exit_with_legacy_fallback(UNSTABLE_FEATURE_NAME, "Deno.cron");
|
|
state.borrow::<Rc<C>>().clone()
|
|
};
|
|
|
|
validate_cron_name(&name)?;
|
|
|
|
let handle = cron_handler.create(CronSpec {
|
|
name,
|
|
cron_schedule,
|
|
backoff_schedule,
|
|
})?;
|
|
|
|
let handle_rid = {
|
|
let mut state = state.borrow_mut();
|
|
state.resource_table.add(CronResource {
|
|
handle: Rc::new(handle),
|
|
})
|
|
};
|
|
Ok(handle_rid)
|
|
}
|
|
|
|
#[op2(async)]
|
|
async fn op_cron_next<C>(
|
|
state: Rc<RefCell<OpState>>,
|
|
#[smi] rid: ResourceId,
|
|
prev_success: bool,
|
|
) -> Result<bool, AnyError>
|
|
where
|
|
C: CronHandler + 'static,
|
|
{
|
|
let cron_handler = {
|
|
let state = state.borrow();
|
|
let resource = match state.resource_table.get::<CronResource<C::EH>>(rid) {
|
|
Ok(resource) => resource,
|
|
Err(err) => {
|
|
if get_custom_error_class(&err) == Some("BadResource") {
|
|
return Ok(false);
|
|
} else {
|
|
return Err(err);
|
|
}
|
|
}
|
|
};
|
|
resource.handle.clone()
|
|
};
|
|
|
|
cron_handler.next(prev_success).await
|
|
}
|
|
|
|
fn validate_cron_name(name: &str) -> Result<(), AnyError> {
|
|
if name.len() > 64 {
|
|
return Err(type_error("Cron name is too long"));
|
|
}
|
|
if !name.chars().all(|c| {
|
|
c.is_ascii_whitespace() || c.is_ascii_alphanumeric() || c == '_' || c == '-'
|
|
}) {
|
|
return Err(type_error("Invalid cron name"));
|
|
}
|
|
Ok(())
|
|
}
|