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use microkv::namespace::NamespaceMicroKV;
use std::fmt::{Debug, Formatter};
#[derive(Clone)]
pub struct Tracker {
microkv: NamespaceMicroKV,
key_current: String,
key_planned: String,
key_running: String,
}
impl Debug for Tracker {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
f.write_str("Tracker {\n")?;
f.write_str(" microkv: ***,\n")?;
f.write_str(&format!(" key_current: {}\n", self.key_current))?;
f.write_str(&format!(" key_planned: {}\n", self.key_planned))?;
f.write_str(&format!(" key_running: {}\n", self.key_running))?;
f.write_str("}")?;
Ok(())
}
}
impl Tracker {
pub fn new(microkv: NamespaceMicroKV, key: impl AsRef<str>) -> Self {
let key = key.as_ref();
Self {
microkv,
key_current: format!("{}.current", key),
key_planned: format!("{}.planned", key),
key_running: format!("{}.running", key),
}
}
}
impl Tracker {
pub fn is_running(&self) -> color_eyre::Result<bool> {
self.read_bool(&self.key_running)
}
pub fn stop_running(&self) -> color_eyre::Result<()> {
self.microkv.put(&self.key_running, &false)?;
Ok(())
}
pub fn start_running(&self) -> color_eyre::Result<()> {
self.microkv.put(&self.key_running, &true)?;
Ok(())
}
pub async fn current(&self) -> color_eyre::Result<usize> {
let is_running = self.is_running()?;
if !is_running {
loop {
let secs = 3;
tracing::warn!(
target: "tracker",
"The track key [{}] isn't running (value is not `true`), wait {} seconds check again.",
&self.key_running,
secs
);
tokio::time::sleep(std::time::Duration::from_secs(secs)).await;
if self.is_running()? {
break;
}
}
}
match self.read_u64(&self.key_planned)? {
Some(planned) => {
self.microkv.put(&self.key_current, &planned)?;
self.microkv.delete(&self.key_planned)?;
Ok(planned as usize)
}
None => {
let current = self.read_u64(&self.key_current)?.unwrap_or(0);
Ok(current as usize)
}
}
}
pub async fn next(&self) -> color_eyre::Result<usize> {
self.current().await.map(|v| v + 1)
}
pub fn finish(&self, block: usize) -> color_eyre::Result<()> {
self.microkv.put(&self.key_current, &block)?;
Ok(())
}
pub fn planned(&self, block: usize) -> color_eyre::Result<()> {
self.microkv.put(&self.key_planned, &block)?;
Ok(())
}
}
impl Tracker {
fn read_bool(&self, key: impl AsRef<str>) -> color_eyre::Result<bool> {
let value = self
.microkv
.get(key.as_ref())?
.unwrap_or(serde_json::Value::Bool(false));
if value.is_boolean() {
return Ok(value.as_bool().unwrap_or(false));
}
if value.is_string() {
let text = value.as_str().unwrap_or("false");
return Ok(text == "true" || text == "1");
}
Ok(false)
}
fn read_u64(&self, key: impl AsRef<str>) -> color_eyre::Result<Option<u64>> {
let value = self.microkv.get(key.as_ref())?;
match value {
Some(v) => {
if v.is_number() {
return Ok(v.as_u64());
}
if v.is_boolean() {
return Ok(v.as_bool().map(|b| if b { 1 } else { 0 }));
}
if v.is_string() {
return match v.as_str() {
Some(t) => {
let t = t.trim();
Ok(Some(t.parse()?))
}
None => Ok(None),
};
}
Ok(None)
}
None => Ok(None),
}
}
}