io.debezium.pipeline.txmetadata

Class TransactionContext

java.lang.Object

io.debezium.pipeline.txmetadata.TransactionContext

@NotThreadSafe
public class TransactionContext
extends Object

The context holds internal state necessary for book-keeping of events in active transaction. The main data tracked are

• active transaction id
• the total event number seen from the transaction
• the number of events per table/collection seen in the transaction

The state of this context is stored in offsets and is recovered upon restart.

Author:

Jiri Pechanec

Field Summary

Fields

Modifier and Type	Field and Description
private static String	OFFSET_TABLE_COUNT_PREFIX
private static int	OFFSET_TABLE_COUNT_PREFIX_LENGTH
private static String	OFFSET_TRANSACTION_ID
private Map<String,Long>	perTableEventCount
private long	totalEventCount
private String	transactionId
private Map<String,Long>	viewPerTableEventCount

Constructor Summary

Constructors

Constructor and Description
TransactionContext()

Method Summary

Modifier and Type	Method and Description
void	beginTransaction(String txId)
void	endTransaction()
long	event(DataCollectionId source)
Map<String,Long>	getPerTableEventCount()
long	getTotalEventCount()
String	getTransactionId()
boolean	isTransactionInProgress()
static TransactionContext	load(Map<String,?> offsets)
private void	reset()
Map<String,Object>	store(Map<String,Object> offset)
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

OFFSET_TRANSACTION_ID

private static final String OFFSET_TRANSACTION_ID

See Also:

Constant Field Values

OFFSET_TABLE_COUNT_PREFIX

private static final String OFFSET_TABLE_COUNT_PREFIX

See Also:

Constant Field Values

OFFSET_TABLE_COUNT_PREFIX_LENGTH

private static final int OFFSET_TABLE_COUNT_PREFIX_LENGTH

transactionId

private String transactionId

perTableEventCount

private final Map<String,Long> perTableEventCount

viewPerTableEventCount

private final Map<String,Long> viewPerTableEventCount

totalEventCount

private long totalEventCount

Constructor Detail

TransactionContext

public TransactionContext()

Method Detail

reset

private void reset()

store

public Map<String,Object> store(Map<String,Object> offset)

load

public static TransactionContext load(Map<String,?> offsets)

isTransactionInProgress

public boolean isTransactionInProgress()

getTransactionId

public String getTransactionId()

getTotalEventCount

public long getTotalEventCount()

beginTransaction

public void beginTransaction(String txId)

endTransaction

public void endTransaction()

event

public long event(DataCollectionId source)

getPerTableEventCount

public Map<String,Long> getPerTableEventCount()

toString

public String toString()

Overrides:

toString in class Object