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pub mod builder;
mod time;
mod state;
use serde::{Deserialize, Serialize};
pub use state::{State, Status};
pub use time::{Offset, Time, Timeout};
use uuid::Uuid;
use crate::core::payload::{Dispatchable, Identifiable, Sortable, Status as StatusPayload};
#[derive(Serialize, Deserialize, Debug, Clone)]
pub struct Message {
id: Uuid,
body: Box<str>,
state: State,
time: Time,
}
impl Message {
fn new(
body: Box<str>,
delay: Option<u32>,
offset: Offset,
max_tries: u32,
timeout: u32,
) -> Self {
Message {
id: Message::generate_id(),
body,
state: State::new(max_tries),
time: Time::new(offset, delay, timeout),
}
}
fn generate_id() -> Uuid {
Uuid::new_v4()
}
pub fn state(&self) -> &State {
&self.state
}
pub fn time(&self) -> &Time {
&self.time
}
}
impl Identifiable for Message {
type Id = Uuid;
fn id(&self) -> Uuid {
self.id
}
}
impl Dispatchable for Message {
type Body = str;
fn obtainable(&self) -> bool {
self.time.check_delay() && !self.time.expired()
}
fn body(&self) -> &Self::Body {
&self.body
}
fn gc(&self) -> bool {
self.state.requires_gc() || (self.state.requeueable() && self.time.expired())
}
}
impl StatusPayload for Message {
fn requeue(&mut self) {
self.state.requeue();
}
fn reserve(&mut self) {
self.state.reserve();
self.time.obtain();
}
fn requeueable(&self) -> bool {
self.state.requeueable()
}
fn reservable(&self) -> bool {
self.state.reservable()
}
fn has_tries(&self) -> bool {
self.state.has_tries()
}
}
impl Sortable for Message {
type Sort = Option<i64>;
fn sort(&self) -> Self::Sort {
self.time.get_raw_delay()
}
}
#[cfg(test)]
mod tests {
use super::builder::MessageBuilder;
use crate::core::payload::Sortable;
macro_rules! delayed_message {
($time:expr) => {
MessageBuilder::default()
.delay($time)
.body("Hello world")
.compose()
.unwrap()
};
}
#[test]
fn test_sort() {
let message1 = delayed_message!(2);
let message2 = delayed_message!(3);
let message3 = delayed_message!(1);
let mut vec = vec![message1.clone(), message2.clone(), message3.clone()];
vec.sort_by_key(|msg| msg.sort());
assert_eq!(vec.pop().unwrap().id, message2.id);
assert_eq!(vec.pop().unwrap().id, message1.id);
assert_eq!(vec.pop().unwrap().id, message3.id);
}
}