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#![cfg(all(test, feature = "future"))]
use std::sync::{
atomic::{AtomicUsize, Ordering},
Arc,
};
use actix_rt::Runtime;
use async_lock::Barrier;
use moka::future::Cache;
const NUM_THREADS: u8 = 16;
#[test]
fn test_get_with() -> Result<(), Box<dyn std::error::Error>> {
const TEN_MIB: usize = 10 * 1024 * 1024; // 10MiB
let cache = Cache::new(100);
let call_counter = Arc::new(AtomicUsize::default());
let barrier = Arc::new(Barrier::new(NUM_THREADS as usize));
let rt = Runtime::new()?;
let tasks: Vec<_> = (0..NUM_THREADS)
.map(|task_id| {
let my_cache = cache.clone();
let my_call_counter = Arc::clone(&call_counter);
let my_barrier = Arc::clone(&barrier);
rt.spawn(async move {
my_barrier.wait().await;
println!("Task {task_id} started.");
let key = "key1".to_string();
let value = match task_id % 4 {
0 => {
my_cache
.get_with(key.clone(), async move {
println!("Task {task_id} inserting a value.");
my_call_counter.fetch_add(1, Ordering::AcqRel);
Arc::new(vec![0u8; TEN_MIB])
})
.await
}
1 => {
my_cache
.get_with_by_ref(key.as_str(), async move {
println!("Task {task_id} inserting a value.");
my_call_counter.fetch_add(1, Ordering::AcqRel);
Arc::new(vec![0u8; TEN_MIB])
})
.await
}
2 => my_cache
.entry(key.clone())
.or_insert_with(async move {
println!("Task {task_id} inserting a value.");
my_call_counter.fetch_add(1, Ordering::AcqRel);
Arc::new(vec![0u8; TEN_MIB])
})
.await
.into_value(),
3 => my_cache
.entry_by_ref(key.as_str())
.or_insert_with(async move {
println!("Task {task_id} inserting a value.");
my_call_counter.fetch_add(1, Ordering::AcqRel);
Arc::new(vec![0u8; TEN_MIB])
})
.await
.into_value(),
_ => unreachable!(),
};
assert_eq!(value.len(), TEN_MIB);
assert!(my_cache.get(key.as_str()).await.is_some());
println!("Task {task_id} got the value. (len: {})", value.len());
})
})
.collect();
rt.block_on(futures_util::future::join_all(tasks));
assert_eq!(call_counter.load(Ordering::Acquire), 1);
Ok(())
}
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