Package io.camunda.zeebe.journal

Interface JournalMetaStore

All Known Implementing Classes:

JournalMetaStore.InMemory

public interface JournalMetaStore

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static class	JournalMetaStore.InMemory

Method Summary

Modifier and Type	Method	Description
boolean	hasLastFlushedIndex()	Returns true if there is no known last flushed index.
long	loadLastFlushedIndex()	Read last flushed index from the metastore.
void	resetLastFlushedIndex()	Nulls the last flushed index.
void	storeLastFlushedIndex(long index)	Update lastFlushedIndex in metastore.

Method Details

storeLastFlushedIndex

void storeLastFlushedIndex(long index)

Update lastFlushedIndex in metastore. This method can be expensive and blocking as the implementations of this may have to write to a database or a file.

Parameters:

index - last flushed index

loadLastFlushedIndex

long loadLastFlushedIndex()

Read last flushed index from the metastore. This method might be expensive and blocking as the implementations of this may have to read from a database or file. It is recommended for the callers of this method to cache lastFlushedIndex and call this method only when necessary.

Returns:

last flushed index

resetLastFlushedIndex

void resetLastFlushedIndex()

Nulls the last flushed index. After calling this, hasLastFlushedIndex() will return true.The actual value is implementation specific; to check if it was reset, call hasLastFlushedIndex().

hasLastFlushedIndex

boolean hasLastFlushedIndex()

Returns true if there is no known last flushed index.