Package io.debezium.connector.oracle.logminer.processor.ehcache

Class EhcacheLogMinerEventProcessor

java.lang.Object

io.debezium.connector.oracle.logminer.processor.AbstractLogMinerEventProcessor<EhcacheTransaction>

io.debezium.connector.oracle.logminer.processor.ehcache.EhcacheLogMinerEventProcessor

All Implemented Interfaces:

CacheProvider<EhcacheTransaction>, LogMinerEventProcessor, AutoCloseable

public class EhcacheLogMinerEventProcessor
extends AbstractLogMinerEventProcessor<EhcacheTransaction>

An AbstractLogMinerEventProcessor implementation for storing buffer details off-heap in a set of Ehcache-backed caches.

Author:

Chris Cranford

Nested Class Summary

Nested classes/interfaces inherited from class io.debezium.connector.oracle.logminer.processor.AbstractLogMinerEventProcessor

AbstractLogMinerEventProcessor.Counters

Field Summary

Fields

Modifier and Type	Field	Description
private final org.ehcache.CacheManager	cacheManager
private final LogMinerCache<String,LogMinerEvent>	eventCache
private static final org.slf4j.Logger	LOGGER
private final LogMinerCache<String,String>	processedTransactionsCache
private final LogMinerCache<String,String>	schemaChangesCache
private final LogMinerCache<String,EhcacheTransaction>	transactionsCache

Fields inherited from class io.debezium.connector.oracle.logminer.processor.AbstractLogMinerEventProcessor

counters, sqlQuery

Fields inherited from interface io.debezium.connector.oracle.logminer.processor.CacheProvider

EVENTS_CACHE_NAME, PROCESSED_TRANSACTIONS_CACHE_NAME, SCHEMA_CHANGES_CACHE_NAME, TRANSACTIONS_CACHE_NAME

Constructor Summary

Constructors

Constructor	Description
EhcacheLogMinerEventProcessor(ChangeEventSource.ChangeEventSourceContext context, OracleConnectorConfig connectorConfig, OracleConnection jdbcConnection, EventDispatcher<OraclePartition,TableId> dispatcher, OraclePartition partition, OracleOffsetContext offsetContext, OracleDatabaseSchema schema, LogMinerStreamingChangeEventSourceMetrics metrics)

Method Summary

Modifier and Type	Method	Description
void	close()
private org.ehcache.CacheManager	createCacheManager(OracleConnectorConfig connectorConfig)
protected EhcacheTransaction	createTransaction(LogMinerEventRow row)	Creates a new transaction based on the supplied START event.
private String	getConfigurationWithSubstitutions(Configuration configuration)
LogMinerCache<String,LogMinerEvent>	getEventCache()	Get the LogMiner events cache Key - The event id, in the format of transactionId-eventSequence Value - The raw LogMinerEvent object instance
LogMinerCache<String,String>	getProcessedTransactionsCache()	Get the processed transactions cache Key - The unique transaction id Value - The transaction's commit or rollback system change number
LogMinerCache<String,String>	getSchemaChangesCache()	Get the Schema Changes cache Key - The system change number of the schema change Value - The table the schema change is related to
LogMinerCache<String,EhcacheTransaction>	getTransactionCache()	Get the transaction cache Key - The unique transaction id Value - The transaction instance
private String	readConfigurationTemplate()

Methods inherited from class io.debezium.connector.oracle.logminer.processor.AbstractLogMinerEventProcessor

abandonTransactionOverEventThreshold, abandonTransactions, addToTransaction, calculateNewStartScn, cleanupAfterTransactionRemovedFromCache, compareStartScn, createQueryStatement, dispatchSchemaChangeEventAndGetTableForNewCapturedTable, displayCacheStatistics, finalizeTransactionCommit, finalizeTransactionRollback, getAbandonedTransactionsCache, getAndRemoveTransactionFromCache, getConfig, getFirstActiveTransactionKey, getLastProcessedScn, getLastProcessedScnChangeTime, getLastScnToAbandon, getLoggedAbandonedTransactionTableNames, getOldestTransactionInCache, getQueryString, getSchema, getTableMetadataDdl, getTransactionCacheMinimumScn, getTransactionEventCount, getTransactionEventIterator, getTransactionIdPrefix, getTransactionKeysWithPrefix, handleCommit, handleCommitNotFoundInBuffer, handleDataEvent, handleLobWrite, handleMissingScn, handleRollback, handleRollbackNotFoundInBuffer, handleSchemaChange, handleSelectLobLocator, handleStart, handleUnsupportedEvent, hasSchemaChangeBeenSeen, isRecentlyProcessed, isTransactionIdWithNoSequence, isTransactionOverEventThreshold, isTransactionUserExcluded, isTrxIdRawValue, oldestTransactionComparison, process, processResults, processRow, purgeCache, reCreateInMemoryCache, removeEventWithRowId, resetTransactionToStart, warnPotentiallyStuckScn

Methods inherited from class java.lang.Object

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

Field Details

LOGGER

private static final org.slf4j.Logger LOGGER

cacheManager

private final org.ehcache.CacheManager cacheManager

transactionsCache

private final LogMinerCache<String,EhcacheTransaction> transactionsCache

eventCache

private final LogMinerCache<String,LogMinerEvent> eventCache

processedTransactionsCache

private final LogMinerCache<String,String> processedTransactionsCache

schemaChangesCache

private final LogMinerCache<String,String> schemaChangesCache

Constructor Details

EhcacheLogMinerEventProcessor

public EhcacheLogMinerEventProcessor(ChangeEventSource.ChangeEventSourceContext context,
 OracleConnectorConfig connectorConfig,
 OracleConnection jdbcConnection,
 EventDispatcher<OraclePartition,TableId> dispatcher,
 OraclePartition partition,
 OracleOffsetContext offsetContext,
 OracleDatabaseSchema schema,
 LogMinerStreamingChangeEventSourceMetrics metrics)

Method Details

createTransaction

protected EhcacheTransaction createTransaction(LogMinerEventRow row)

Description copied from class: AbstractLogMinerEventProcessor

Creates a new transaction based on the supplied START event.

Specified by:

createTransaction in class AbstractLogMinerEventProcessor<EhcacheTransaction>

Parameters:

row - the event row, must not be null

Returns:

the implementation-specific Transaction instance

getTransactionCache

public LogMinerCache<String,EhcacheTransaction> getTransactionCache()

Description copied from interface: CacheProvider

Get the transaction cache

• Key - The unique transaction id
• Value - The transaction instance

Returns:

the transaction cache, never null

getEventCache

public LogMinerCache<String,LogMinerEvent> getEventCache()

Description copied from interface: CacheProvider

Get the LogMiner events cache

• Key - The event id, in the format of transactionId-eventSequence
• Value - The raw LogMinerEvent object instance

Returns:

the evnts cache, never null

getSchemaChangesCache

public LogMinerCache<String,String> getSchemaChangesCache()

Description copied from interface: CacheProvider

Get the Schema Changes cache

• Key - The system change number of the schema change
• Value - The table the schema change is related to

Returns:

the schema changes cache, never null

getProcessedTransactionsCache

public LogMinerCache<String,String> getProcessedTransactionsCache()

Description copied from interface: CacheProvider

Get the processed transactions cache

• Key - The unique transaction id
• Value - The transaction's commit or rollback system change number

Returns:

the processed transactions cache, never null

close

public void close()
           throws Exception

Throws:

Exception

createCacheManager

private org.ehcache.CacheManager createCacheManager(OracleConnectorConfig connectorConfig)

getConfigurationWithSubstitutions

private String getConfigurationWithSubstitutions(Configuration configuration)

readConfigurationTemplate

private String readConfigurationTemplate()