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use std::path::PathBuf;
use std::sync::Arc;
use std::sync::RwLock;
use anyhow::Context;
use anyhow::Error;
use anyhow::Result;
use anyhow::anyhow;
use diesel::PgConnection;
use futures::FutureExt;
use indicatif::ProgressBar;
use itertools::Itertools;
use tokio::stream::StreamExt;
use tokio::sync::mpsc::UnboundedReceiver;
use tokio::sync::mpsc::UnboundedSender;
use uuid::Uuid;
use crate::endpoint::Endpoint;
use crate::endpoint::EndpointConfiguration;
use crate::filestore::StagingStore;
use crate::job::RunnableJob;
use crate::log::LogItem;
use crate::util::progress::ProgressBars;
pub struct EndpointScheduler {
endpoints: Vec<Arc<RwLock<Endpoint>>>,
staging_store: Arc<RwLock<StagingStore>>,
db: Arc<PgConnection>,
progressbars: ProgressBars,
multibar: indicatif::MultiProgress,
submit: crate::db::models::Submit,
}
impl EndpointScheduler {
pub async fn setup(endpoints: Vec<EndpointConfiguration>, staging_store: Arc<RwLock<StagingStore>>, db: Arc<PgConnection>, progressbars: ProgressBars, submit: crate::db::models::Submit) -> Result<Self> {
let endpoints = Self::setup_endpoints(endpoints).await?;
Ok(EndpointScheduler {
endpoints,
staging_store,
db,
progressbars,
multibar: indicatif::MultiProgress::new(),
submit,
})
}
async fn setup_endpoints(endpoints: Vec<EndpointConfiguration>) -> Result<Vec<Arc<RwLock<Endpoint>>>> {
let unordered = futures::stream::FuturesUnordered::new();
for cfg in endpoints.into_iter() {
unordered.push({
Endpoint::setup(cfg)
.map(|r_ep| {
r_ep.map(RwLock::new)
.map(Arc::new)
})
});
}
unordered.collect().await
}
/// Schedule a Job
///
/// # Warning
///
/// This function blocks as long as there is no free endpoint available!
pub async fn schedule_job(&self, job: RunnableJob) -> Result<JobHandle> {
let endpoint = self.select_free_endpoint().await?;
Ok(JobHandle {
bar: self.multibar.add(self.progressbars.job_bar(job.uuid())),
endpoint,
job,
staging_store: self.staging_store.clone(),
db: self.db.clone(),
submit: self.submit.clone(),
})
}
async fn select_free_endpoint(&self) -> Result<Arc<RwLock<Endpoint>>> {
loop {
let unordered = futures::stream::FuturesUnordered::new();
for ep in self.endpoints.iter().cloned() {
unordered.push(async move {
let wl = ep.write().map_err(|_| anyhow!("Lock poisoned"))?;
wl.number_of_running_containers().await.map(|u| (u, ep.clone()))
});
}
let endpoints = unordered.collect::<Result<Vec<_>>>().await?;
if let Some(endpoint) = endpoints
.iter()
.sorted_by(|tpla, tplb| tpla.0.cmp(&tplb.0))
.map(|tpl| tpl.1.clone())
.next()
{
return Ok(endpoint)
}
}
}
}
pub struct JobHandle {
endpoint: Arc<RwLock<Endpoint>>,
job: RunnableJob,
bar: ProgressBar,
db: Arc<PgConnection>,
staging_store: Arc<RwLock<StagingStore>>,
submit: crate::db::models::Submit,
}
impl std::fmt::Debug for JobHandle {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::result::Result<(), std::fmt::Error> {
write!(f, "JobHandle ( job: {} )", self.job.uuid())
}
}
impl JobHandle {
pub async fn run(self) -> Result<Vec<PathBuf>> {
let (log_sender, log_receiver) = tokio::sync::mpsc::unbounded_channel::<LogItem>();
let ep = self.endpoint
.read()
.map_err(|_| anyhow!("Lock poisoned"))?;
let job_id = self.job.uuid().clone();
trace!("Running on Job {} on Endpoint {}", job_id, ep.name());
let res = ep
.run_job(self.job, log_sender, self.staging_store);
let logres = LogReceiver {
job_id,
log_receiver,
bar: self.bar,
db: self.db,
}.join();
let (res, logres) = tokio::join!(res, logres);
trace!("Found result for job {}: {:?}", job_id, res);
logres.with_context(|| anyhow!("Collecting logs for job on '{}'", ep.name()))?;
let (paths, container_hash) = res.with_context(|| anyhow!("Running job on '{}'", ep.name()))?;
Ok(paths)
}
}
struct LogReceiver {
job_id: Uuid,
log_receiver: UnboundedReceiver<LogItem>,
bar: ProgressBar,
db: Arc<PgConnection>,
}
impl LogReceiver {
async fn join(mut self) -> Result<()> {
let mut success = None;
while let Some(logitem) = self.log_receiver.recv().await {
match logitem {
LogItem::Line(_) => {
// ignore
},
LogItem::Progress(u) => {
self.bar.set_position(u as u64);
},
LogItem::CurrentPhase(phasename) => {
self.bar.set_message(&format!("{} Phase: {}", self.job_id, phasename));
},
LogItem::State(Ok(s)) => {
self.bar.set_message(&format!("{} State Ok: {}", self.job_id, s));
success = Some(true);
},
LogItem::State(Err(e)) => {
self.bar.set_message(&format!("{} State Err: {}", self.job_id, e));
success = Some(false);
},
}
}
match success {
Some(true) => self.bar.finish_with_message(&format!("{} finished successfully", self.job_id)),
Some(false) => self.bar.finish_with_message(&format!("{} finished with error", self.job_id)),
None => self.bar.finish_with_message(&format!("{} finished", self.job_id)),
}
Ok(())
}
}
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