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

Class AsyncStateFastTop1Function

java.lang.Object

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

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>

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

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

org.apache.flink.table.runtime.operators.rank.async.AsyncStateFastTop1Function

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.common.functions.RichFunction, org.apache.flink.streaming.api.checkpoint.CheckpointedFunction

public class AsyncStateFastTop1Function
extends AbstractAsyncStateTopNFunction
implements org.apache.flink.streaming.api.checkpoint.CheckpointedFunction

A more concise implementation for AppendOnlyTopNFunction and UpdatableTopNFunction when only Top-1 is desired. This function can handle updating stream because the RankProcessStrategy is inferred as UpdateFastStrategy, i.e., 1) the upsert key of input steam contains partition key; 2) the sort field is updated monotonely under the upsert key.

Different with FastTop1Function, this function is used with async state api.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.table.runtime.operators.rank.AbstractTopNFunction

AbstractTopNFunction.AbstractTopNHelper

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

constantRankEnd, hitCount, inputRowType, invalidCounter, isConstantRankEnd, keyContext, outputRankNumber, rankEndFetcher, rankStart, requestCount, sortKeyComparator, sortKeySelector, ttlConfig

Constructor Summary

Constructors

Constructor	Description
AsyncStateFastTop1Function(org.apache.flink.api.common.state.StateTtlConfig ttlConfig, InternalTypeInfo<org.apache.flink.table.data.RowData> inputRowType, GeneratedRecordComparator generatedSortKeyComparator, RowDataKeySelector sortKeySelector, RankType rankType, RankRange rankRange, boolean generateUpdateBefore, boolean outputRankNumber, long cacheSize)

Method Summary

Modifier and Type	Method	Description
void	initializeState(org.apache.flink.runtime.state.FunctionInitializationContext context)
void	open(org.apache.flink.api.common.functions.OpenContext openContext)
void	processElement(org.apache.flink.table.data.RowData input, org.apache.flink.streaming.api.functions.KeyedProcessFunction.Context ctx, org.apache.flink.util.Collector<org.apache.flink.table.data.RowData> out)
void	snapshotState(org.apache.flink.runtime.state.FunctionSnapshotContext context)

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

initRankEnd

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

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

Methods inherited from class org.apache.flink.streaming.api.functions.KeyedProcessFunction

onTimer

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

Constructor Detail

AsyncStateFastTop1Function

public AsyncStateFastTop1Function(org.apache.flink.api.common.state.StateTtlConfig ttlConfig,
                                  InternalTypeInfo<org.apache.flink.table.data.RowData> inputRowType,
                                  GeneratedRecordComparator generatedSortKeyComparator,
                                  RowDataKeySelector sortKeySelector,
                                  RankType rankType,
                                  RankRange rankRange,
                                  boolean generateUpdateBefore,
                                  boolean outputRankNumber,
                                  long cacheSize)

Method Detail

open

public void open(org.apache.flink.api.common.functions.OpenContext openContext)
          throws Exception

Specified by:

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

Overrides:

open in class AbstractAsyncStateTopNFunction

Throws:

Exception

processElement

public void processElement(org.apache.flink.table.data.RowData input,
                           org.apache.flink.streaming.api.functions.KeyedProcessFunction.Context ctx,
                           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

snapshotState

public void snapshotState(org.apache.flink.runtime.state.FunctionSnapshotContext context)
                   throws Exception

Specified by:

snapshotState in interface org.apache.flink.streaming.api.checkpoint.CheckpointedFunction

Throws:

Exception

initializeState

public void initializeState(org.apache.flink.runtime.state.FunctionInitializationContext context)
                     throws Exception

Specified by:

initializeState in interface org.apache.flink.streaming.api.checkpoint.CheckpointedFunction

Throws:

Exception