Package io.camunda.zeebe.journal

Class JournalMetaStore.InMemory

java.lang.Object

io.camunda.zeebe.journal.JournalMetaStore.InMemory

All Implemented Interfaces:

JournalMetaStore

Enclosing interface:

JournalMetaStore

public static class JournalMetaStore.InMemory
extends Object
implements JournalMetaStore

Nested Class Summary

Nested classes/interfaces inherited from interface io.camunda.zeebe.journal.JournalMetaStore

JournalMetaStore.InMemory

Constructor Summary

Constructors

Constructor	Description
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.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

InMemory

public InMemory()

Method Details

storeLastFlushedIndex

public void storeLastFlushedIndex(long index)

Description copied from interface: JournalMetaStore

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.

Specified by:

storeLastFlushedIndex in interface JournalMetaStore

Parameters:

index - last flushed index

loadLastFlushedIndex

public long loadLastFlushedIndex()

Description copied from interface: JournalMetaStore

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.

Specified by:

loadLastFlushedIndex in interface JournalMetaStore

Returns:

last flushed index

resetLastFlushedIndex

public void resetLastFlushedIndex()

Description copied from interface: JournalMetaStore

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

Specified by:

resetLastFlushedIndex in interface JournalMetaStore

hasLastFlushedIndex

public boolean hasLastFlushedIndex()

Description copied from interface: JournalMetaStore

Returns true if there is no known last flushed index.

Specified by:

hasLastFlushedIndex in interface JournalMetaStore