pomfrit

Prometheus metrics exporter with hot reload

Example:

```rust use pomfrit::formatter::*;

/// Your metrics as a struct struct MyMetrics<'a> { ctx: &'a str, somediff: u32, sometime: u32, }

/// Describe how your metrics will be displayed impl std::fmt::Display for MyMetrics<'> { fn fmt(&self, f: &mut std::fmt::Formatter<'>) -> std::fmt::Result { f.beginmetric("somediff") .label("label1", self.ctx) .label("label2", "some value") .value(self.some_diff)?;

    f.begin_metric("some_time")
        .label("label1", self.ctx)
        .value(self.some_time)
}

}

async fn myapp() { // Create inactive exporter let (exporter, writer) = pomfrit::createexporter(None).await.unwrap();

// Spawn task that will run in the background and write metrics
writer.spawn(|buf| {
    buf.write(MyMetrics {
        ctx: "asd",
        some_diff: 123,
        some_time: 456,
    }).write(MyMetrics {
        ctx: "qwe",
        some_diff: 111,
        some_time: 444,
    });
});

// ...

// Reload exporter config
exporter.reload(Some(pomfrit::Config {
    collection_interval_sec: 10,
    ..Default::default()
})).await.unwrap();

} ```