mirror of https://github.com/fralalonde/dipstick
51 lines
1.6 KiB
Rust
51 lines
1.6 KiB
Rust
//! An app demonstrating the basics of the metrics front-end.
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//! Defines metrics of each kind and use them to print values to the console in multiple ways.
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use dipstick::{time, Input, InputScope, Prefixed, Stream};
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use std::io;
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use std::thread::sleep;
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use std::time::Duration;
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fn main() {
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// for this demo, print metric values to the console
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let app_metrics = Stream::write_to(io::stdout()).metrics();
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// metrics can be predefined by type and name
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let counter = app_metrics.counter("counter_a");
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let level = app_metrics.level("level_a");
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let timer = app_metrics.timer("timer_b");
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// metrics can also be declared and used ad-hoc (use output.cache() if this happens often)
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app_metrics.counter("just_once").count(4);
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// metric names can be prepended with a common prefix
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let prefixed_metrics = app_metrics.named("subsystem");
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let event = prefixed_metrics.marker("event_c");
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let gauge = prefixed_metrics.gauge("gauge_d");
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// each kind of metric has a different method name to prevent errors
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counter.count(11);
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level.adjust(-4);
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level.adjust(5);
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gauge.value(22);
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gauge.value(-24);
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event.mark();
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// time can be measured multiple equivalent ways:
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// in microseconds (used internally)
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timer.interval_us(35573);
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// using the time! macro
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time!(timer, sleep(Duration::from_millis(5)));
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// using a closure
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timer.time(|| sleep(Duration::from_millis(5)));
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// using a "time handle"
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let start_time = timer.start();
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sleep(Duration::from_millis(5));
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timer.stop(start_time);
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}
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