MemoryDatabaseHistory (Debezium Core 1.7.0.Alpha1 API)

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 a local file.

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

All Methods Instance Methods Concrete Methods
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