1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
use std::sync::Arc;
use std::task::{Context, Poll};
use derive_builder::Builder;
use futures::{FutureExt, TryFutureExt};
use hyper::{Body, Request, Response};
use metriki_core::metrics::TimerContextArc;
use metriki_core::MetricsRegistry;
use tower_layer::Layer;
use tower_service::Service;
use crate::common::ResultFuture;
#[cfg_attr(docsrs, doc(cfg(feature = "macros")))]
#[derive(Debug, Clone)]
pub struct HyperMetricsService<S> {
registry: Arc<MetricsRegistry>,
base_metric_name: String,
inner: S,
}
impl<S, RespBody> Service<Request<Body>> for HyperMetricsService<S>
where
S: Service<Request<Body>, Response = Response<RespBody>> + Send,
S::Future: Send + 'static,
{
type Response = Response<RespBody>;
type Error = S::Error;
type Future = ResultFuture<Self::Response, Self::Error>;
fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
self.inner.poll_ready(cx)
}
fn call(&mut self, req: Request<Body>) -> Self::Future {
let registry = self.registry.clone();
let name = Arc::new(self.base_metric_name.clone());
let request_timer = registry.timer(&format!("{}.all", name));
let method_timer = registry.timer(&format!("{}.{}", name, req.method().as_str()));
let request_timer_ctx = TimerContextArc::start(request_timer);
let method_timer_ctx = TimerContextArc::start(method_timer);
registry.counter(&format!("{}.inflight", name)).inc(1);
let inner_registry_err = registry.clone();
let inner_name_err = name.clone();
let f = self
.inner
.call(req)
.map(move |resp| {
request_timer_ctx.stop();
method_timer_ctx.stop();
registry.counter(&format!("{}.inflight", name)).dec(1);
if let Ok(ref resp) = resp {
let status_family = resp.status().as_u16() / 100;
registry
.meter(&format!("{}.{}xx", name, status_family))
.mark();
}
resp
})
.map_err(move |e| {
inner_registry_err
.meter(&format!("{}.error", inner_name_err))
.mark();
inner_registry_err
.counter(&format!("{}.inflight", inner_name_err))
.dec(1);
e
});
Box::pin(f)
}
}
#[cfg_attr(docsrs, doc(cfg(feature = "macros")))]
#[derive(Builder, Debug, Clone)]
pub struct HyperMetricsLayer {
registry: Arc<MetricsRegistry>,
#[builder(setter(into), default = "\"requests\".to_owned()")]
base_metric_name: String,
}
impl<S> Layer<S> for HyperMetricsLayer {
type Service = HyperMetricsService<S>;
fn layer(&self, service: S) -> Self::Service {
HyperMetricsService {
registry: self.registry.clone(),
inner: service,
base_metric_name: self.base_metric_name.clone(),
}
}
}