pub struct ExactlyOnceProcessor { /* private fields */ }Expand description
Wraps a state backend and deduplication log to provide exactly-once processing guarantees.
Implementations§
Source§impl ExactlyOnceProcessor
impl ExactlyOnceProcessor
Sourcepub fn new(config: DeduplicationConfig, backend: Arc<dyn StateBackend>) -> Self
pub fn new(config: DeduplicationConfig, backend: Arc<dyn StateBackend>) -> Self
Create a new processor.
Sourcepub fn process<R, F>(
&mut self,
id: MessageId,
processor: F,
) -> Result<Option<R>, StreamError>
pub fn process<R, F>( &mut self, id: MessageId, processor: F, ) -> Result<Option<R>, StreamError>
Process a message exactly once.
If id has already been processed within the deduplication window the
closure is NOT invoked and Ok(None) is returned.
Otherwise the closure is called with a fresh transaction. The closure
is expected to add state changes to the transaction; this method then
commits it and returns Ok(Some(result)).
Sourcepub fn maintenance(&mut self) -> usize
pub fn maintenance(&mut self) -> usize
Perform maintenance: evict expired dedup entries.
Sourcepub fn stats(&self) -> ExactlyOnceStats
pub fn stats(&self) -> ExactlyOnceStats
Statistics about this processor.
Auto Trait Implementations§
impl Freeze for ExactlyOnceProcessor
impl !RefUnwindSafe for ExactlyOnceProcessor
impl Send for ExactlyOnceProcessor
impl Sync for ExactlyOnceProcessor
impl Unpin for ExactlyOnceProcessor
impl UnsafeUnpin for ExactlyOnceProcessor
impl !UnwindSafe for ExactlyOnceProcessor
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