Package com.twilio.kudu.sql

Class ScannerCallback

java.lang.Object

com.twilio.kudu.sql.ScannerCallback

All Implemented Interfaces:

com.stumbleupon.async.Callback<com.stumbleupon.async.Deferred<Void>,org.apache.kudu.client.RowResultIterator>

public final class ScannerCallback
extends Object
implements com.stumbleupon.async.Callback<com.stumbleupon.async.Deferred<Void>,org.apache.kudu.client.RowResultIterator>

Scanner Callback that produces CalciteScannerMessage into a BlockingQueue. This will contain rows from Kudu in Scanner order which is different from sorted order. To get sorted order out of this Callback it needs to be used on a AsyncKuduScanner over exactly one Partition

Field Summary

Fields inherited from interface com.stumbleupon.async.Callback

PASSTHROUGH

Constructor Summary

Constructors

Constructor

Description

ScannerCallback(CalciteKuduTable calciteKuduTable, org.apache.kudu.client.AsyncKuduScanner scanner, BlockingQueue<CalciteScannerMessage<CalciteRow>> rowResults, AtomicBoolean scansShouldStop, AtomicBoolean cancelFlag, org.apache.kudu.Schema projectedSchema, KuduScanStats scanStats, boolean isScannerSorted, org.apache.calcite.linq4j.function.Function1<Object,Object> projectionMapper, org.apache.calcite.linq4j.function.Predicate1<Object> filterFunction, boolean isSingleObject, List<Integer> sortPkColumns)

Method Summary

Modifier and Type	Method	Description
com.stumbleupon.async.Deferred<Void>	call(org.apache.kudu.client.RowResultIterator nextBatch)
void	nextBatch()	After an Batch is completed, this method should be called to fetch the next

Methods inherited from class java.lang.Object

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

Constructor Details

ScannerCallback

public ScannerCallback(CalciteKuduTable calciteKuduTable,
 org.apache.kudu.client.AsyncKuduScanner scanner,
 BlockingQueue<CalciteScannerMessage<CalciteRow>> rowResults,
 AtomicBoolean scansShouldStop,
 AtomicBoolean cancelFlag,
 org.apache.kudu.Schema projectedSchema,
 KuduScanStats scanStats,
 boolean isScannerSorted,
 org.apache.calcite.linq4j.function.Function1<Object,Object> projectionMapper,
 org.apache.calcite.linq4j.function.Predicate1<Object> filterFunction,
 boolean isSingleObject,
 List<Integer> sortPkColumns)

Method Details

nextBatch

public void nextBatch()

After an Batch is completed, this method should be called to fetch the next

call

public com.stumbleupon.async.Deferred<Void> call(org.apache.kudu.client.RowResultIterator nextBatch)

Specified by:

call in interface com.stumbleupon.async.Callback<com.stumbleupon.async.Deferred<Void>,org.apache.kudu.client.RowResultIterator>