pub struct PostgresConsensus { /* private fields */ }
Expand description

Implementation of Consensus over a Postgres database.

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impl PostgresConsensus

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pub async fn open( config: PostgresConsensusConfig ) -> Result<Self, ExternalError>

Open a Postgres Consensus instance with config, for the collection named shard.

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pub async fn drop_and_recreate(&self) -> Result<(), ExternalError>

Drops and recreates the consensus table in Postgres

ONLY FOR TESTING

Trait Implementations§

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impl Consensus for PostgresConsensus

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fn list_keys(&self) -> ResultStream<'_, String>

Returns all the keys ever created in the consensus store.
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fn head<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 str ) -> Pin<Box<dyn Future<Output = Result<Option<VersionedData>, ExternalError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Returns a recent version of data, and the corresponding sequence number, if one exists at this location.
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fn compare_and_set<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 str, expected: Option<SeqNo>, new: VersionedData ) -> Pin<Box<dyn Future<Output = Result<CaSResult, ExternalError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Update the VersionedData stored at this location to new, iff the current sequence number is exactly expected and new’s sequence number > the current sequence number. Read more
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fn scan<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 str, from: SeqNo, limit: usize ) -> Pin<Box<dyn Future<Output = Result<Vec<VersionedData>, ExternalError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Return limit versions of data stored for this key at sequence numbers >= from, in ascending order of sequence number. Read more
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fn truncate<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 str, seqno: SeqNo ) -> Pin<Box<dyn Future<Output = Result<usize, ExternalError>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Deletes all historical versions of the data stored at key that are < seqno, iff seqno <= the current sequence number. Read more
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impl Debug for PostgresConsensus

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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

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fn type_id(&self) -> TypeId

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where T: ?Sized,

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

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fn with_context(self, otel_cx: Context) -> WithContext<Self>

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impl<Unshared, Shared> IntoShared<Shared> for Unshared
where Shared: FromUnshared<Unshared>,

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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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