pub async fn load_queue<P, DB>(&self, source: P) -> Result<Queue<DB>, PersistenceError>
    where
        P: AsRef<Path>,
        DB: EventLog<Vec<Event<'static>>> + Serialize + DeserializeOwned,
    {
        let events = match self
            .load::<Event, _>(source.as_ref().join(QUEUE_FILE))
            .await
        {
            Ok(events) => events,
            Err(PersistenceError::FileOpenError(e)) => {
                error!("Log file not found: {}", e);
                Vec::new()
            }
            Err(e) => return Err(e),
        };

        let database = if self.config.compaction {
            let compaction_path = source.as_ref().join(QUEUE_COMPACTION_FILE);

            let inner_db = match self.get_snapshot().load::<DB, _>(&compaction_path).await {
                Ok(mut database) => {
                    database.apply_log(events);
                    database
                }
                Err(PersistenceError::FileOpenError(e)) => {
                    error!("Compaction file not found: {}", e);
                    DB::from_log(events)
                }
                Err(e) => return Err(e),
            };

            self.get_snapshot()
                .persist(&inner_db, &compaction_path)
                .await?;

            match self.prune(&source).await {
                Err(PersistenceError::FileOpenError(_)) | Ok(_) => (),
                Err(e) => return Err(e),
            };

            inner_db
        } else {
            DB::from_log(events)
        };

        cfg_if! {
            if #[cfg(feature = "replication")] {
                // Thanks to GC threshold, it's currently impossible to use log driver
                let replication_storage = match self.get_snapshot().load(source.as_ref().join(SNAPSHOT_REPLICATION_FILE)).await {
                    Ok(storage) => storage,
                    Err(PersistenceError::FileOpenError(e)) => {
                        error!("{}", e);
                        None
                    },
                    Err(e) => return Err(e)
                };

                let queue = Queue::new(database, replication_storage);
            } else {
                let queue = Queue::new(database);
            }
        }

        Ok(queue)
    }
/// Restore database events from `source` log file (usually queue name)
///
/// If specified in [`PersistenceConfig`], compaction will be executed after successful loading.
Restore database events from `source` log file (usually queue name)
If specified in [`PersistenceConfig`], compaction will be executed after successful loading.
Restore database events from ` source ` log file ( usually queue name ) If specified in [ ` PersistenceConfig ` ] compaction will be executed after successful loading .
pub async fn load_queue<P, DB>(&self, source: P) -> Result<Queue<DB>, PersistenceError>
    where
        P: AsRef<Path>,
        DB: EventLog<Vec<Event<'static>>> + Serialize + DeserializeOwned,
    {
        let events = match self
            .load::<Event, _>(source.as_ref().join(QUEUE_FILE))
            .await
        {
            Ok(events) => events,
            Err(PersistenceError::FileOpenError(e)) => {
                error!("Log file not found: {}", e);
                Vec::new()
            }
            Err(e) => return Err(e),
        };
        let database = if self.config.compaction {
            let compaction_path = source.as_ref().join(QUEUE_COMPACTION_FILE);
            let inner_db = match self.get_snapshot().load::<DB, _>(&compaction_path).await {
                Ok(mut database) => {
                    database.apply_log(events);
                    database
                }
                Err(PersistenceError::FileOpenError(e)) => {
                    error!("Compaction file not found: {}", e);
                    DB::from_log(events)
                }
                Err(e) => return Err(e),
            };
            self.get_snapshot()
                .persist(&inner_db, &compaction_path)
                .await?;
            match self.prune(&source).await {
                Err(PersistenceError::FileOpenError(_)) | Ok(_) => (),
                Err(e) => return Err(e),
            };
            inner_db
        } else {
            DB::from_log(events)
        };
        cfg_if! {
            if #[cfg(feature = "replication")] {
                // Thanks to GC threshold, it's currently impossible to use log driver
                let replication_storage = match self.get_snapshot().load(source.as_ref().join(SNAPSHOT_REPLICATION_FILE)).await {
                    Ok(storage) => storage,
                    Err(PersistenceError::FileOpenError(e)) => {
                        error!("{}", e);
                        None
                    },
                    Err(e) => return Err(e)
                };
                let queue = Queue::new(database, replication_storage);
            } else {
                let queue = Queue::new(database);
            }
        }
        Ok(queue)
    }
pub async fn load_queue < P , DB > ( & self , source : P ) -> Result < Queue < DB > , PersistenceError > where P : AsRef < Path > , DB : EventLog < Vec < Event < ' static > > > + Serialize + DeserializeOwned , { let events = match self . load :: < Event , _ > ( source . as_ref ( ) . join ( QUEUE_FILE ) ) . await { Ok ( events ) => events , Err ( PersistenceError :: FileOpenError ( e ) ) => { error ! ( " " e ) ; Vec :: new ( ) } Err ( e ) => return Err ( e ) , } ; let database = if self . config . compaction { let compaction_path = source . as_ref ( ) . join ( QUEUE_COMPACTION_FILE ) ; let inner_db = match self . get_snapshot ( ) . load :: < DB , _ > ( & compaction_path ) . await { Ok ( mut database ) => { database . apply_log ( events ) ; database } Err ( PersistenceError :: FileOpenError ( e ) ) => { error ! ( " " e ) ; DB :: from_log ( events ) } Err ( e ) => return Err ( e ) , } ; self . get_snapshot ( ) . persist ( & inner_db , & compaction_path ) . await ? ; match self . prune ( & source ) . await { Err ( PersistenceError :: FileOpenError ( _ ) ) | Ok ( _ ) => ( ) , Err ( e ) => return Err ( e ) , } ; inner_db } else { DB :: from_log ( events ) } ; cfg_if ! { if [ cfg ( feature " " ) ] { // Thanks to GC threshold, it's currently impossible to use log driver let replication_storage match self get_snapshot ( ) load ( source as_ref ( ) join ( SNAPSHOT_REPLICATION_FILE ) ) await { Ok ( storage ) storage Err ( PersistenceError FileOpenError ( e ) ) { error ( " " e ) None } Err ( e ) return Err ( e ) } let queue Queue new ( database replication_storage ) } else { let queue Queue new ( database ) } } Ok ( queue ) }
Restore database events from `source` log file (usually queue name)
If specified in [`PersistenceConfig`], compaction will be executed after successful loading.
Restore database events from ` source ` log file ( usually queue name ) If specified in [ ` PersistenceConfig ` ] compaction will be executed after successful loading .
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