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use std::time::Instant;
use instruments::{Instrument, Update, Updates};
use snapshot::Snapshot;
use util;
use {Descriptive, PutsSnapshot};
pub struct LastOccurrenceTracker {
name: String,
title: Option<String>,
description: Option<String>,
happened_last: Option<Instant>,
invert: bool,
make_none_zero: bool,
}
impl LastOccurrenceTracker {
pub fn new_with_defaults<T: Into<String>>(name: T) -> LastOccurrenceTracker {
LastOccurrenceTracker {
name: name.into(),
title: None,
description: None,
happened_last: None,
invert: false,
make_none_zero: false,
}
}
pub fn name(&self) -> &str {
&self.name
}
pub fn set_name<T: Into<String>>(&mut self, name: T) {
self.name = name.into();
}
pub fn set_title<T: Into<String>>(&mut self, title: T) {
self.title = Some(title.into())
}
pub fn set_description<T: Into<String>>(&mut self, description: T) {
self.description = Some(description.into())
}
pub fn set_invert(&mut self, invert: bool) {
self.invert = invert
}
pub fn enable_invert(&mut self) {
self.invert = true
}
pub fn set_make_none_zero(&mut self, make_zero: bool) {
self.make_none_zero = make_zero
}
pub fn make_none_zero(&self) -> bool {
self.make_none_zero
}
pub fn elapsed_since_last_occurrence(&self) -> Option<u64> {
self.happened_last
.map(|last| (Instant::now() - last).as_secs())
}
}
impl Instrument for LastOccurrenceTracker {}
impl PutsSnapshot for LastOccurrenceTracker {
fn put_snapshot(&self, into: &mut Snapshot, descriptive: bool) {
util::put_postfixed_descriptives(self, &self.name, into, descriptive);
if let Some(v) = self.elapsed_since_last_occurrence() {
into.items.push((self.name.clone(), v.into()));
} else {
if self.make_none_zero() {
into.items.push((self.name.clone(), 0.into()));
}
}
}
}
impl Updates for LastOccurrenceTracker {
fn update(&mut self, _: &Update) {
self.happened_last = Some(Instant::now())
}
}
impl Descriptive for LastOccurrenceTracker {
fn title(&self) -> Option<&str> {
self.title.as_ref().map(|n| &**n)
}
fn description(&self) -> Option<&str> {
self.description.as_ref().map(|n| &**n)
}
}