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// Copyright 2019 TiKV Project Authors. Licensed under Apache-2.0.
use std::thread;
use std::time::Duration;
use prometheus::{Counter, CounterVec, Encoder, Gauge, GaugeVec, Opts, Registry, TextEncoder};
fn main() {
let r = Registry::new();
let counter_opts = Opts::new("test_counter", "test counter help")
.const_label("a", "1")
.const_label("b", "2");
let counter = Counter::with_opts(counter_opts).unwrap();
let counter_vec_opts = Opts::new("test_counter_vec", "test counter vector help")
.const_label("a", "1")
.const_label("b", "2");
let counter_vec = CounterVec::new(counter_vec_opts, &["c", "d"]).unwrap();
r.register(Box::new(counter.clone())).unwrap();
r.register(Box::new(counter_vec.clone())).unwrap();
let gauge_opts = Opts::new("test_gauge", "test gauge help")
.const_label("a", "1")
.const_label("b", "2");
let gauge = Gauge::with_opts(gauge_opts).unwrap();
let gauge_vec_opts = Opts::new("test_gauge_vec", "test gauge vector help")
.const_label("a", "1")
.const_label("b", "2");
let gauge_vec = GaugeVec::new(gauge_vec_opts, &["c", "d"]).unwrap();
r.register(Box::new(gauge.clone())).unwrap();
r.register(Box::new(gauge_vec.clone())).unwrap();
counter.inc();
assert_eq!(counter.get() as u64, 1);
counter.inc_by(42.0);
assert_eq!(counter.get() as u64, 43);
counter_vec.with_label_values(&["3", "4"]).inc();
assert_eq!(counter_vec.with_label_values(&["3", "4"]).get() as u64, 1);
counter_vec.with_label_values(&["3", "4"]).inc_by(42.0);
assert_eq!(counter_vec.with_label_values(&["3", "4"]).get() as u64, 43);
gauge.inc();
assert_eq!(gauge.get() as u64, 1);
gauge.add(42.0);
assert_eq!(gauge.get() as u64, 43);
gauge_vec.with_label_values(&["3", "4"]).inc();
assert_eq!(gauge_vec.with_label_values(&["3", "4"]).get() as u64, 1);
gauge_vec.with_label_values(&["3", "4"]).set(42.0);
assert_eq!(gauge_vec.with_label_values(&["3", "4"]).get() as u64, 42);
let c2 = counter.clone();
let cv2 = counter_vec.clone();
let g2 = gauge.clone();
let gv2 = gauge_vec.clone();
thread::spawn(move || {
for _ in 0..10 {
thread::sleep(Duration::from_millis(500));
c2.inc();
cv2.with_label_values(&["3", "4"]).inc();
g2.inc();
gv2.with_label_values(&["3", "4"]).inc();
}
});
thread::spawn(move || {
for _ in 0..5 {
thread::sleep(Duration::from_secs(1));
counter.inc();
counter_vec.with_label_values(&["3", "4"]).inc();
gauge.dec();
gauge_vec.with_label_values(&["3", "4"]).set(42.0);
}
});
// Choose your writer and encoder.
let mut buffer = Vec::<u8>::new();
let encoder = TextEncoder::new();
for _ in 0..5 {
let metric_families = r.gather();
encoder.encode(&metric_families, &mut buffer).unwrap();
// Output to the standard output.
println!("{}", String::from_utf8(buffer.clone()).unwrap());
buffer.clear();
thread::sleep(Duration::from_secs(1));
}
}
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