mirror of
https://github.com/meilisearch/MeiliSearch
synced 2024-06-07 05:17:48 +02:00
194 lines
5.7 KiB
Rust
194 lines
5.7 KiB
Rust
use super::{DumpError, DumpInfo, DumpMsg, DumpResult, DumpStatus};
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use crate::helpers::compression;
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use crate::index_controller::{update_actor, uuid_resolver};
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use async_stream::stream;
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use chrono::Utc;
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use futures::stream::StreamExt;
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use log::{error, info};
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use std::{
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path::{Path, PathBuf},
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sync::Arc,
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};
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use tokio::{fs::create_dir_all, sync::{mpsc, oneshot, RwLock}};
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pub const CONCURRENT_DUMP_MSG: usize = 10;
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pub struct DumpActor<UuidResolver, Update> {
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inbox: Option<mpsc::Receiver<DumpMsg>>,
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uuid_resolver: UuidResolver,
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update: Update,
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dump_path: PathBuf,
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dump_info: Arc<RwLock<Option<DumpInfo>>>,
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_update_db_size: u64,
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_index_db_size: u64,
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}
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/// Generate uid from creation date
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fn generate_uid() -> String {
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Utc::now().format("%Y%m%d-%H%M%S%3f").to_string()
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}
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impl<UuidResolver, Update> DumpActor<UuidResolver, Update>
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where
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UuidResolver: uuid_resolver::UuidResolverHandle + Send + Sync + Clone + 'static,
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Update: update_actor::UpdateActorHandle + Send + Sync + Clone + 'static,
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{
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pub fn new(
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inbox: mpsc::Receiver<DumpMsg>,
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uuid_resolver: UuidResolver,
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update: Update,
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dump_path: impl AsRef<Path>,
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_index_db_size: u64,
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_update_db_size: u64,
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) -> Self {
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Self {
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inbox: Some(inbox),
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uuid_resolver,
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update,
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dump_path: dump_path.as_ref().into(),
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dump_info: Arc::new(RwLock::new(None)),
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_index_db_size,
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_update_db_size,
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}
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}
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pub async fn run(mut self) {
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info!("Started dump actor.");
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let mut inbox = self
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.inbox
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.take()
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.expect("Dump Actor must have a inbox at this point.");
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let stream = stream! {
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loop {
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match inbox.recv().await {
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Some(msg) => yield msg,
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None => break,
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}
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}
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};
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stream
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.for_each_concurrent(Some(CONCURRENT_DUMP_MSG), |msg| self.handle_message(msg))
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.await;
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error!("Dump actor stopped.");
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}
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async fn handle_message(&self, msg: DumpMsg) {
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use DumpMsg::*;
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match msg {
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CreateDump { ret } => {
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let _ = self.handle_create_dump(ret).await;
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}
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DumpInfo { ret, uid } => {
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let _ = ret.send(self.handle_dump_info(uid).await);
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}
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}
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}
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async fn handle_create_dump(&self, ret: oneshot::Sender<DumpResult<DumpInfo>>) {
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if self.is_running().await {
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ret.send(Err(DumpError::DumpAlreadyRunning))
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.expect("Dump actor is dead");
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return;
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}
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let uid = generate_uid();
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let info = DumpInfo::new(uid.clone(), DumpStatus::InProgress);
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*self.dump_info.write().await = Some(info.clone());
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ret.send(Ok(info)).expect("Dump actor is dead");
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let dump_info = self.dump_info.clone();
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let task_result = tokio::task::spawn(perform_dump(
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self.dump_path.clone(),
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self.uuid_resolver.clone(),
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self.update.clone(),
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uid.clone(),
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))
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.await;
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match task_result {
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Ok(Ok(())) => {
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(*dump_info.write().await).as_mut().expect("Inconsistent dump service state").done();
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info!("Dump succeed");
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}
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Ok(Err(e)) => {
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(*dump_info.write().await).as_mut().expect("Inconsistent dump service state").with_error(e.to_string());
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error!("Dump failed: {}", e);
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}
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Err(_) => {
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error!("Dump panicked. Dump status set to failed");
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*dump_info.write().await = Some(DumpInfo::new(uid, DumpStatus::Failed));
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}
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};
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}
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async fn handle_dump_info(&self, uid: String) -> DumpResult<DumpInfo> {
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match &*self.dump_info.read().await {
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None => self.dump_from_fs(uid).await,
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Some(DumpInfo { uid: ref s, .. }) if &uid != s => self.dump_from_fs(uid).await,
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Some(info) => Ok(info.clone()),
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}
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}
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async fn dump_from_fs(&self, uid: String) -> DumpResult<DumpInfo> {
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self.dump_path
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.join(format!("{}.dump", &uid))
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.exists()
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.then(|| DumpInfo::new(uid.clone(), DumpStatus::Done))
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.ok_or(DumpError::DumpDoesNotExist(uid))
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}
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async fn is_running(&self) -> bool {
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matches!(
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*self.dump_info.read().await,
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Some(DumpInfo {
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status: DumpStatus::InProgress,
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..
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})
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)
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}
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}
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async fn perform_dump<UuidResolver, Update>(
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path: PathBuf,
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uuid_resolver: UuidResolver,
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update_handle: Update,
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uid: String,
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) -> anyhow::Result<()>
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where
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UuidResolver: uuid_resolver::UuidResolverHandle + Send + Sync + Clone + 'static,
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Update: update_actor::UpdateActorHandle + Send + Sync + Clone + 'static,
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{
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info!("Performing dump.");
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create_dir_all(&path).await?;
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let path_clone = path.clone();
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let temp_dump_dir = tokio::task::spawn_blocking(|| tempfile::TempDir::new_in(path_clone)).await??;
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let temp_dump_path = temp_dump_dir.path().to_owned();
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let uuids = uuid_resolver.dump(temp_dump_path.clone()).await?;
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update_handle.dump(uuids, temp_dump_path.clone()).await?;
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let dump_path = tokio::task::spawn_blocking(move || -> anyhow::Result<PathBuf> {
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let temp_dump_file = tempfile::NamedTempFile::new_in(&path)?;
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compression::to_tar_gz(temp_dump_path, temp_dump_file.path())?;
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let dump_path = path.join(format!("{}.dump", uid));
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temp_dump_file.persist(&dump_path)?;
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Ok(dump_path)
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})
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.await??;
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info!("Created dump in {:?}.", dump_path);
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Ok(())
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}
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