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use core::Flush;
use core::attributes::{Attributes, WithAttributes, Prefixed};
use core::name::MetricName;
use core::input::InputKind;
use core::output::{Output, OutputMetric, OutputScope, OutputDyn};
use core::error;
use std::rc::Rc;
use std::sync::Arc;
#[derive(Clone)]
pub struct MultiOutput {
attributes: Attributes,
outputs: Vec<Arc<OutputDyn + Send + Sync + 'static>>,
}
impl Output for MultiOutput {
type SCOPE = MultiOutputScope;
fn output(&self) -> Self::SCOPE {
let scopes = self.outputs.iter().map(|out| out.output_dyn()).collect();
MultiOutputScope {
attributes: self.attributes.clone(),
scopes,
}
}
}
impl MultiOutput {
pub fn output() -> MultiOutput {
MultiOutput {
attributes: Attributes::default(),
outputs: vec![],
}
}
pub fn add_target<OUT: Output + Send + Sync + 'static>(&self, out: OUT) -> Self {
let mut cloned = self.clone();
cloned.outputs.push(Arc::new(out));
cloned
}
}
impl WithAttributes for MultiOutput {
fn get_attributes(&self) -> &Attributes { &self.attributes }
fn mut_attributes(&mut self) -> &mut Attributes { &mut self.attributes }
}
#[derive(Clone, Default)]
pub struct MultiOutputScope {
attributes: Attributes,
scopes: Vec<Rc<OutputScope>>,
}
impl MultiOutputScope {
pub fn new() -> Self {
MultiOutputScope {
attributes: Attributes::default(),
scopes: vec![],
}
}
pub fn add_target<IN: OutputScope + 'static>(&self, scope: IN) -> Self {
let mut cloned = self.clone();
cloned.scopes.push(Rc::new(scope));
cloned
}
}
impl OutputScope for MultiOutputScope {
fn new_metric(&self, name: MetricName, kind: InputKind) -> OutputMetric {
let name = &self.prefix_append(name);
let metrics: Vec<OutputMetric> = self.scopes.iter()
.map(move |scope| scope.new_metric(name.clone(), kind))
.collect();
OutputMetric::new(move |value, labels| for metric in &metrics {
metric.write(value, labels.clone())
})
}
}
impl Flush for MultiOutputScope {
fn flush(&self) -> error::Result<()> {
for w in &self.scopes {
w.flush()?;
}
Ok(())
}
}
impl WithAttributes for MultiOutputScope {
fn get_attributes(&self) -> &Attributes { &self.attributes }
fn mut_attributes(&mut self) -> &mut Attributes { &mut self.attributes }
}