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Revert "use lru_time_cache to improve cache expiry"

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This reverts commit 063d418747.
This commit is contained in:
Sam Rijs 2018-02-24 14:44:22 +11:00
parent 063d418747
commit fec6f12a48
4 changed files with 34 additions and 18 deletions
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17
Cargo.lock generated
View file

@ -273,6 +273,11 @@ name = "libc"
version = "0.2.36"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "linked-hash-map"
version = "0.4.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "literalext"
version = "0.1.1"
@ -295,9 +300,12 @@ dependencies = [
]
[[package]]
name = "lru_time_cache"
version = "0.8.0"
name = "lru-cache"
version = "0.1.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"linked-hash-map 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "maud"
@ -680,7 +688,7 @@ dependencies = [
"hyper-tls 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
"indexmap 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
"lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
"lru_time_cache 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
"lru-cache 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
"maud 0.17.2 (registry+https://github.com/rust-lang/crates.io-index)",
"relative-path 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
"route-recognizer 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
@ -966,10 +974,11 @@ dependencies = [
"checksum lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c8f31047daa365f19be14b47c29df4f7c3b581832407daabe6ae77397619237d"
"checksum lazycell 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a6f08839bc70ef4a3fe1d566d5350f519c5912ea86be0df1740a7d247c7fc0ef"
"checksum libc 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)" = "1e5d97d6708edaa407429faa671b942dc0f2727222fb6b6539bf1db936e4b121"
"checksum linked-hash-map 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7860ec297f7008ff7a1e3382d7f7e1dcd69efc94751a2284bafc3d013c2aa939"
"checksum literalext 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2f42dd699527975a1e0d722e0707998671188a0125f2051d2d192fc201184a81"
"checksum log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)" = "e19e8d5c34a3e0e2223db8e060f9e8264aeeb5c5fc64a4ee9965c062211c024b"
"checksum log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "89f010e843f2b1a31dbd316b3b8d443758bc634bed37aabade59c686d644e0a2"
"checksum lru_time_cache 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d151f6ddf993d99d1f3fa84530f8a91287497606559e6792ac5453268c17455b"
"checksum lru-cache 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "4d06ff7ff06f729ce5f4e227876cb88d10bc59cd4ae1e09fbb2bde15c850dc21"
"checksum maud 0.17.2 (registry+https://github.com/rust-lang/crates.io-index)" = "c0023c814f4a545946ab612ad64a4edce8126d4fe4f0abc5f319b80877112048"
"checksum maud_htmlescape 0.17.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d0fb85bccffc42302ad1e1ed8679f6a39d1317f775a37fbc3f79bdfbe054bfb7"
"checksum maud_macros 0.17.2 (registry+https://github.com/rust-lang/crates.io-index)" = "0d8377d77c1995044b8ad67a59d15b434c8b7de470ac743de4916ee2bd9fce55"

2
Cargo.toml
View file

@ -10,7 +10,7 @@ hyper = "0.11.15"
hyper-tls = "0.1.2"
indexmap = { version = "0.4.1", features = ["serde-1"] }
lazy_static = "1.0.0"
lru_time_cache = "0.8.0"
lru-cache = "0.1.1"
maud = "0.17.2"
relative-path = { version = "0.3.7", features = ["serde"] }
route-recognizer = "0.1.12"

2
src/main.rs
View file

@ -10,7 +10,7 @@ extern crate hyper;
extern crate hyper_tls;
extern crate indexmap;
#[macro_use] extern crate lazy_static;
extern crate lru_time_cache;
extern crate lru_cache;
extern crate maud;
extern crate relative_path;
extern crate route_recognizer;

31
src/utils/cache.rs
View file

@ -1,49 +1,53 @@
use std::fmt::{Debug, Formatter, Result as FmtResult};
use std::time::Duration;
use std::hash::Hash;
use std::time::{Duration, Instant};
use std::ops::Deref;
use std::sync::Mutex;
use failure::Error;
use futures::{Future, Poll};
use futures::future::{FromErr, Shared, SharedItem};
use lru_time_cache::LruCache;
use lru_cache::LruCache;
use shared_failure::SharedFailure;
use tokio_service::Service;
pub struct Cache<S>
where S: Service<Error=Error>,
S::Request: Ord
S::Request: Hash + Eq
{
inner: S,
cache: Mutex<LruCache<S::Request, Shared<FromErr<S::Future, SharedFailure>>>>
duration: Duration,
cache: Mutex<LruCache<S::Request, (Instant, Shared<FromErr<S::Future, SharedFailure>>)>>
}
impl<S> Debug for Cache<S>
where S: Service<Error=Error> + Debug,
S::Request: Ord
S::Request: Hash + Eq
{
fn fmt(&self, fmt: &mut Formatter) -> FmtResult {
fmt.debug_struct("Cache")
.field("inner", &self.inner)
.field("duration", &self.duration)
.finish()
}
}
impl<S> Cache<S>
where S: Service<Error=Error>,
S::Request: Clone + Ord
S::Request: Hash + Eq
{
pub fn new(service: S, duration: Duration, capacity: usize) -> Cache<S> {
Cache {
inner: service,
cache: Mutex::new(LruCache::with_expiry_duration_and_capacity(duration, capacity))
duration: duration,
cache: Mutex::new(LruCache::new(capacity))
}
}
}
impl<S> Service for Cache<S>
where S: Service<Error=Error>,
S::Request: Clone + Ord
S::Request: Clone + Hash + Eq
{
type Request = S::Request;
type Response = CachedItem<S::Response>;
@ -51,14 +55,17 @@ impl<S> Service for Cache<S>
type Future = Cached<S::Future>;
fn call(&self, req: Self::Request) -> Self::Future {
let now = Instant::now();
let mut cache = self.cache.lock().expect("lock poisoned");
if let Some(shared_future) = cache.get_mut(&req) {
if let Some(Ok(_)) = shared_future.peek() {
return Cached(shared_future.clone());
if let Some(&mut (valid_until, ref shared_future)) = cache.get_mut(&req) {
if valid_until > now {
if let Some(Ok(_)) = shared_future.peek() {
return Cached(shared_future.clone());
}
}
}
let shared_future = self.inner.call(req.clone()).from_err().shared();
cache.insert(req, shared_future.clone());
cache.insert(req, (now + self.duration, shared_future.clone()));
Cached(shared_future)
}
}