org.apache.flink.table.runtime.operators.rank

Class AppendOnlyTopNFunction

java.lang.Object

org.apache.flink.api.common.functions.AbstractRichFunction

org.apache.flink.streaming.api.functions.KeyedProcessFunction<K,IN,OUT>

org.apache.flink.table.runtime.functions.KeyedProcessFunctionWithCleanupState<org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData>

org.apache.flink.table.runtime.operators.rank.AbstractTopNFunction

org.apache.flink.table.runtime.operators.rank.AppendOnlyTopNFunction

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.common.functions.RichFunction, CleanupState

public class AppendOnlyTopNFunction
extends AbstractTopNFunction

A TopN function could handle insert-only stream.

The input stream should only contain INSERT messages.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.streaming.api.functions.KeyedProcessFunction

org.apache.flink.streaming.api.functions.KeyedProcessFunction.Context, org.apache.flink.streaming.api.functions.KeyedProcessFunction.OnTimerContext

Field Summary

Fields inherited from class org.apache.flink.table.runtime.operators.rank.AbstractTopNFunction

hitCount, inputRowType, keyContext, outputRankNumber, rankEnd, requestCount, sortKeyComparator, sortKeySelector

Fields inherited from class org.apache.flink.table.runtime.functions.KeyedProcessFunctionWithCleanupState

stateCleaningEnabled

Constructor Summary

Constructors

Constructor and Description
AppendOnlyTopNFunction(long minRetentionTime, long maxRetentionTime, InternalTypeInfo<org.apache.flink.table.data.RowData> inputRowType, GeneratedRecordComparator sortKeyGeneratedRecordComparator, RowDataKeySelector sortKeySelector, RankType rankType, RankRange rankRange, boolean generateUpdateBefore, boolean outputRankNumber, long cacheSize)

Method Summary

Modifier and Type	Method and Description
void	onTimer(long timestamp, org.apache.flink.streaming.api.functions.KeyedProcessFunction.OnTimerContext ctx, org.apache.flink.util.Collector<org.apache.flink.table.data.RowData> out)
void	open(org.apache.flink.configuration.Configuration parameters)
void	processElement(org.apache.flink.table.data.RowData input, org.apache.flink.streaming.api.functions.KeyedProcessFunction.Context context, org.apache.flink.util.Collector<org.apache.flink.table.data.RowData> out)

Methods inherited from class org.apache.flink.table.runtime.operators.rank.AbstractTopNFunction

checkSortKeyInBufferRange, collectDelete, collectDelete, collectInsert, collectInsert, collectUpdateAfter, collectUpdateAfter, collectUpdateBefore, collectUpdateBefore, getDefaultTopNSize, hasOffset, initRankEnd, isInRankEnd, isInRankRange, registerMetric, setKeyContext

Methods inherited from class org.apache.flink.table.runtime.functions.KeyedProcessFunctionWithCleanupState

cleanupState, initCleanupTimeState, isProcessingTimeTimer, needToCleanupState, registerProcessingCleanupTimer

Methods inherited from class org.apache.flink.api.common.functions.AbstractRichFunction

close, getIterationRuntimeContext, getRuntimeContext, setRuntimeContext

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.table.runtime.functions.CleanupState

registerProcessingCleanupTimer

Constructor Detail

AppendOnlyTopNFunction

public AppendOnlyTopNFunction(long minRetentionTime,
                              long maxRetentionTime,
                              InternalTypeInfo<org.apache.flink.table.data.RowData> inputRowType,
                              GeneratedRecordComparator sortKeyGeneratedRecordComparator,
                              RowDataKeySelector sortKeySelector,
                              RankType rankType,
                              RankRange rankRange,
                              boolean generateUpdateBefore,
                              boolean outputRankNumber,
                              long cacheSize)

Method Detail

open

public void open(org.apache.flink.configuration.Configuration parameters)
          throws Exception

Specified by:

open in interface org.apache.flink.api.common.functions.RichFunction

Overrides:

open in class AbstractTopNFunction

Throws:

Exception

processElement

public void processElement(org.apache.flink.table.data.RowData input,
                           org.apache.flink.streaming.api.functions.KeyedProcessFunction.Context context,
                           org.apache.flink.util.Collector<org.apache.flink.table.data.RowData> out)
                    throws Exception

Specified by:

processElement in class org.apache.flink.streaming.api.functions.KeyedProcessFunction<org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData>

Throws:

Exception

onTimer

public void onTimer(long timestamp,
                    org.apache.flink.streaming.api.functions.KeyedProcessFunction.OnTimerContext ctx,
                    org.apache.flink.util.Collector<org.apache.flink.table.data.RowData> out)
             throws Exception

Overrides:

onTimer in class org.apache.flink.streaming.api.functions.KeyedProcessFunction<org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData>

Throws:

Exception