com.sleepycat.je.rep.stream

Interface FeederFilter

public interface FeederFilter

The FeederFilter is used by the Feeder to determine whether a record should be sent to the Replica. The filter object is created at the replica and is transmitted to the Feeder as part of the syncup process. The filter thus represents replica code that is running inside the Feeder, that is, the computation has been moved closer to the data and can be used to eliminate unnecessary network communication overheads.

Method Summary

Modifier and Type	Method and Description
OutputWireRecord	execute(OutputWireRecord record, RepImpl repImpl) The execute method that invoked before a record is sent to the replica.
String[]	getTableIds() Gets arrays of subscribed table ids.
void	setLogger(Logger logger) Sets the logger for classes that implement the interface

Method Detail

execute

OutputWireRecord execute(OutputWireRecord record,
                         RepImpl repImpl)

The execute method that invoked before a record is sent to the replica. If the filter returns null, the feeder will not send the record to the replica as part of the replication stream, since it's not of interest to the replica. It can for example be used to filter out tables that are not of interest to the replica.

Parameters:

record - the record to be filtered

repImpl - repImpl of the RN where the filter is executed

Returns:

the original input record if it is to be sent to the replica. null if it's to be skipped.

getTableIds

String[] getTableIds()

Gets arrays of subscribed table ids. If null or array length is 0, that means the subscriber would subscribe all tables in the store.

Returns:

arrays of subscribed table ids

setLogger

void setLogger(Logger logger)

Sets the logger for classes that implement the interface

Parameters:

logger - logger