class InMemoryFanoutBuffer extends NamedLogging
The in-memory fan-out buffer.
This buffer stores the last ingested maxBufferSize accepted and rejected submission updates as
com.digitalasset.canton.platform.store.interfaces.TransactionLogUpdate and allows bypassing
IndexDB persistence fetches for recent updates for:
- update streams
- command completion streams
- by-offset and by-update-id update lookups
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- new InMemoryFanoutBuffer(maxBufferSize: Int, metrics: LedgerApiServerMetrics, maxBufferedChunkSize: Int, loggerFactory: NamedLoggerFactory)
- maxBufferSize
The maximum buffer size.
- metrics
The Daml metrics.
- maxBufferedChunkSize
The maximum size of buffered chunks returned by
slice.
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- def flush(): Unit
Remove all buffered entries
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- def logger: TracedLogger
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- val loggerFactory: NamedLoggerFactory
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- InMemoryFanoutBuffer → NamedLogging
- def lookup(lookupKey: LookupKey): Option[TransactionLogUpdate]
Lookup the accepted transaction log update by the lookup key.
- def lookupTransaction(offset: Offset): Option[TransactionAccepted]
Lookup the accepted transaction update by transaction offset.
- def lookupTransaction(updateId: InMemoryFanoutBuffer.UpdateId): Option[TransactionAccepted]
Lookup the accepted transaction update by transaction id.
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- def prune(endInclusive: Offset): Unit
Removes entries starting from the buffer head up until
endInclusive.Removes entries starting from the buffer head up until
endInclusive.- endInclusive
The last inclusive (highest) buffer offset to be pruned.
- def push(entry: TransactionLogUpdate): Unit
Appends a new event to the buffer.
Appends a new event to the buffer.
Starts evicting from the tail when
maxBufferSizeis reached.- entry
The buffer entry.
- def slice[FILTER_RESULT](startInclusive: Offset, endInclusive: Offset, filter: (TransactionLogUpdate) => Option[FILTER_RESULT]): BufferSlice[(Offset, FILTER_RESULT)]
Returns a slice of events from the buffer.
Returns a slice of events from the buffer.
- startInclusive
The start inclusive bound of the requested range.
- endInclusive
The end inclusive bound of the requested range.
- filter
A lambda function that allows pre-filtering the buffered elements before assembling
maxBufferedChunkSize-sized slices.- returns
A slice of the series of events as an ordered vector satisfying the input bounds.
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