Package io.debezium.relational.history

Class MemoryDatabaseHistory

java.lang.Object

io.debezium.relational.history.AbstractDatabaseHistory

io.debezium.relational.history.MemoryDatabaseHistory

All Implemented Interfaces:

DatabaseHistory

@ThreadSafe
public final class MemoryDatabaseHistory
extends AbstractDatabaseHistory

A DatabaseHistory implementation that stores the schema history in memory.

Author:

Randall Hauch

Field Summary

Fields

Modifier and Type	Field	Description
private FunctionalReadWriteLock	lock
private List<HistoryRecord>	records

Fields inherited from class io.debezium.relational.history.AbstractDatabaseHistory

config, INTERNAL_PREFER_DDL, logger

Fields inherited from interface io.debezium.relational.history.DatabaseHistory

CONFIGURATION_FIELD_PREFIX_STRING, DDL_FILTER, NAME, SKIP_UNPARSEABLE_DDL_STATEMENTS, STORE_ONLY_CAPTURED_TABLES_DDL, STORE_ONLY_MONITORED_TABLES_DDL

Constructor Summary

Constructors

Constructor	Description
MemoryDatabaseHistory()	Create an instance that keeps the history in memory.

Method Summary

Modifier and Type	Method	Description
boolean	exists()	Determines if the database history entity exists; i.e.
protected void	recoverRecords(Consumer<HistoryRecord> records)
boolean	storageExists()	Determines if the underlying storage exists (e.g.
protected void	storeRecord(HistoryRecord record)
String	toString()

Methods inherited from class io.debezium.relational.history.AbstractDatabaseHistory

configure, initializeStorage, record, record, recover, skipUnparseableDdlStatements, start, stop, storeOnlyCapturedTables

Methods inherited from class java.lang.Object

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

Field Detail

records

private final List<HistoryRecord> records

lock

private final FunctionalReadWriteLock lock

Constructor Detail

MemoryDatabaseHistory

public MemoryDatabaseHistory()

Create an instance that keeps the history in memory.

Method Detail

storeRecord

protected void storeRecord(HistoryRecord record)

Specified by:

storeRecord in class AbstractDatabaseHistory

recoverRecords

protected void recoverRecords(Consumer<HistoryRecord> records)

Specified by:

recoverRecords in class AbstractDatabaseHistory

storageExists

public boolean storageExists()

Description copied from interface: DatabaseHistory

Determines if the underlying storage exists (e.g. a Kafka topic, file or similar). Note: storage may exist while history entities not yet written, see DatabaseHistory.exists()

exists

public boolean exists()

Description copied from interface: DatabaseHistory

Determines if the database history entity exists; i.e. the storage must have been initialized and the history must have been populated.

toString

public String toString()

Overrides:

toString in class Object