176 lines
4.3 KiB
Rust
176 lines
4.3 KiB
Rust
use serde::{Serialize, Serializer};
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use std::{
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collections::HashMap,
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sync::{Arc, RwLock},
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};
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use tracing::warn;
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use uuid::Uuid;
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#[derive(Default, Serialize, Clone)]
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pub struct Job {
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pub job_type: Option<JobType>,
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pub title: String,
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pub progress: Option<f32>,
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pub state: JobState,
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}
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pub type JobType = String;
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#[derive(Default, Serialize, Clone, Copy, PartialEq)]
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pub enum JobState {
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#[default]
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InProgress,
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Done,
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Failed,
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}
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#[derive(Default)]
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pub struct JobContainerData {
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jobs: HashMap<JobId, Job>,
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}
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#[derive(Debug, Clone)]
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pub enum JobError {
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JobInProgessError(String),
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JobNotFound,
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Unknown(String),
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}
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impl std::fmt::Display for JobError {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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match self {
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JobError::JobInProgessError(msg) => {
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write!(f, "job of type {} is already in progress", self.0)
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}
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JobError::Unknown(msg) => write!(f, "Unknown: {}", msg),
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}
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}
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}
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#[derive(Clone)]
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pub struct JobContainer(Arc<RwLock<JobContainerData>>);
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impl JobContainer {
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pub fn new() -> Self {
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JobContainer(Arc::new(RwLock::new(JobContainerData::default())))
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}
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pub fn add_job<S, IS>(&mut self, job_type: IS, title: S) -> Result<JobHandle, JobError>
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where
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S: AsRef<str>,
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IS: Into<Option<S>>,
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{
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let jobs = &mut self
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.0
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.write()
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.map_err(|err| {
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JobError::Unknown(format!("Couldn't lock job container for writing! {err:?}"))
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})?
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.jobs;
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let job = Job {
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job_type: job_type.into().map(|jt| String::from(jt.as_ref())),
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title: String::from(title.as_ref()),
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..Default::default()
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};
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if let Some(job_type) = &job.job_type {
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if jobs
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.iter()
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.any(|(_, j)| j.state == JobState::InProgress && j.job_type == job.job_type)
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{
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return Err(JobError::JobInProgessError(job_type).into());
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}
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}
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let job_id = JobId(Uuid::new_v4());
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jobs.insert(job_id, job);
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Ok(JobHandle {
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job_id,
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container: self.0.clone(),
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})
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}
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pub fn get_jobs(&self) -> Result<HashMap<JobId, Job>, JobError> {
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let jobs = &self
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.0
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.read()
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.map_err(|err| {
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JobError::Unknown(format!("Couldn't lock job container for writing! {err:?}"))
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})?
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.jobs;
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Ok(jobs.clone())
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}
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}
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impl Default for JobContainer {
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fn default() -> Self {
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Self::new()
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}
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}
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#[derive(Clone, Hash, PartialEq, Eq, Copy)]
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pub struct JobId(Uuid);
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impl Serialize for JobId {
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fn serialize<S>(&self, serializer: S) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
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where
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S: Serializer,
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{
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serializer.serialize_str(format!("{}", self.0).as_str())
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}
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}
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pub struct JobHandle {
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job_id: JobId,
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container: Arc<RwLock<JobContainerData>>,
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}
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impl JobHandle {
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pub fn update_progress(&mut self, progress: f32) -> Result<(), JobError> {
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let jobs = &mut self
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.container
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.write()
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.map_err(|err| {
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JobError::Unknown(format!("Couldn't lock job container for writing! {err:?}"))
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})?
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.jobs;
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if let Some(job) = jobs.get_mut(&self.job_id) {
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job.progress = Some(progress);
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if progress >= 100.0 {
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job.state = JobState::Done;
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}
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Ok(())
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} else {
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Err(JobError::JobNotFound)
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}
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}
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pub fn update_state(&mut self, state: JobState) -> Result<(), JobError> {
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let jobs = &mut self
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.container
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.write()
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.map_err(|err| {
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JobError::Unknown(format!("Couldn't lock job container for writing! {err:?}"))
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})?
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.jobs;
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if let Some(job) = jobs.get_mut(&self.job_id) {
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job.state = state;
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Ok(())
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} else {
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Err(JobError::JobNotFound)
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}
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}
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}
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impl Drop for JobHandle {
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fn drop(&mut self) {
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let update_result = self.update_state(JobState::Failed);
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if let Err(err) = update_result {
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warn!("Handle dropped, but couldn't set self as failed! {:?}", err);
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}
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}
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}
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