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OnDiskDurabilityBackend

Struct OnDiskDurabilityBackend 

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pub struct OnDiskDurabilityBackend { /* private fields */ }
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On-Disk-Durability-Backend (DurabilityKind::Persistent).

Layout: <root>/<topic>/<hex(instance_key)>/<sequence>.bin enthaelt den Encoded-Payload; <root>/<topic>/<hex(instance_key)>/.unregistered markiert den Instance-Cleanup-Zeitpunkt (Unix-Nanos als ASCII).

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impl OnDiskDurabilityBackend

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pub fn new<P: Into<PathBuf>>( root: P, qos: DurabilityServiceQosPolicy, ) -> Result<Self>

Konstruktor — erzeugt den Root-Pfad falls nicht vorhanden.

§Errors

Filesystem-Fehler beim Anlegen des Roots.

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impl DurabilityBackend for OnDiskDurabilityBackend

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fn store(&self, sample: DurabilitySample) -> Result<()>

Persistiert ein Sample. Read more
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fn replay_for_topic(&self, topic: &str) -> Result<Vec<DurabilitySample>>

Liefert alle gespeicherten Samples fuer ein Topic in der Reihenfolge ihrer Sequence-Number (sortiert pro Instance). Read more
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fn unregister_instance( &self, topic: &str, instance_key: [u8; 16], now: SystemTime, ) -> Result<()>

Markiert eine Instance als unregister, sodass nach service_cleanup_delay die zugehoerigen Samples entfernt werden. now ist die aktuelle Wall-Clock; das eigentliche Loeschen passiert spaeter via Self::cleanup. Read more
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fn cleanup(&self, now: SystemTime) -> Result<usize>

Loescht alle Instanzen, deren unregister-Zeitpunkt + Cleanup- Delay vor now liegt. Liefert die Anzahl entfernter Instanzen. Read more

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.