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, RowDataTypeInfo 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,
                              RowDataTypeInfo 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