org.apache.flink.table.runtime.operators.join.lookup

Class LookupJoinWithCalcRunner

java.lang.Object

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

org.apache.flink.streaming.api.functions.ProcessFunction<RowData,RowData>

org.apache.flink.table.runtime.operators.join.lookup.LookupJoinRunner

org.apache.flink.table.runtime.operators.join.lookup.LookupJoinWithCalcRunner

All Implemented Interfaces:

Serializable, Function, RichFunction

public class LookupJoinWithCalcRunner
extends LookupJoinRunner

The join runner with an additional calculate function on the dimension table.

See Also:

Serialized Form

Nested Class Summary

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

ProcessFunction.Context, ProcessFunction.OnTimerContext

Field Summary

Fields inherited from class org.apache.flink.table.runtime.operators.join.lookup.LookupJoinRunner

collector, isLeftOuterJoin, nullRow, outRow, preFilterCondition, tableFieldsCount

Constructor Summary

Constructors

Constructor and Description
LookupJoinWithCalcRunner(GeneratedFunction<FlatMapFunction<RowData,RowData>> generatedFetcher, GeneratedFunction<FlatMapFunction<RowData,RowData>> generatedCalc, GeneratedCollector<ListenableCollector<RowData>> generatedCollector, GeneratedFunction<FilterCondition> generatedFilterCondition, boolean isLeftOuterJoin, int tableFieldsCount)

Method Summary

Modifier and Type	Method and Description
void	close() Tear-down method for the user code.
Collector<RowData>	getFetcherCollector()
void	open(OpenContext openContext) Initialization method for the function.

Methods inherited from class org.apache.flink.table.runtime.operators.join.lookup.LookupJoinRunner

doFetch, padNullForLeftJoin, preFilter, prepareCollector, processElement

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

onTimer

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

getIterationRuntimeContext, getRuntimeContext, open, setRuntimeContext

Methods inherited from class java.lang.Object

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

Constructor Detail

LookupJoinWithCalcRunner

public LookupJoinWithCalcRunner(GeneratedFunction<FlatMapFunction<RowData,RowData>> generatedFetcher,
                                GeneratedFunction<FlatMapFunction<RowData,RowData>> generatedCalc,
                                GeneratedCollector<ListenableCollector<RowData>> generatedCollector,
                                GeneratedFunction<FilterCondition> generatedFilterCondition,
                                boolean isLeftOuterJoin,
                                int tableFieldsCount)

Method Detail

open

public void open(OpenContext openContext)
          throws Exception

Description copied from interface: RichFunction

Initialization method for the function. It is called before the actual working methods (like map or join) and thus suitable for one time setup work. For functions that are part of an iteration, this method will be invoked at the beginning of each iteration superstep.

The openContext object passed to the function can be used for configuration and initialization. The openContext contains some necessary information that were configured on the function in the program composition.

 public class MyFilter extends RichFilterFunction<String> {

     private String searchString;

     public void open(OpenContext openContext) {
         // initialize the value of searchString
     }

     public boolean filter(String value) {
         return value.equals(searchString);
     }
 }
 

By default, this method does nothing.

1. If you implement open(OpenContext openContext), the open(OpenContext openContext) will be invoked and the open(Configuration parameters) won't be invoked. 2. If you don't implement open(OpenContext openContext), the open(Configuration parameters) will be invoked in the default implementation of the open(OpenContext openContext).

Specified by:

open in interface RichFunction

Overrides:

open in class LookupJoinRunner

Parameters:

openContext - The context containing information about the context in which the function is opened.

Throws:

Exception - Implementations may forward exceptions, which are caught by the runtime. When the runtime catches an exception, it aborts the task and lets the fail-over logic decide whether to retry the task execution.

close

public void close()
           throws Exception

Description copied from interface: RichFunction

Tear-down method for the user code. It is called after the last call to the main working methods (e.g. map or join). For functions that are part of an iteration, this method will be invoked after each iteration superstep.

This method can be used for clean up work.

Specified by:

close in interface RichFunction

Overrides:

close in class LookupJoinRunner

Throws:

Exception - Implementations may forward exceptions, which are caught by the runtime. When the runtime catches an exception, it aborts the task and lets the fail-over logic decide whether to retry the task execution.

getFetcherCollector

public Collector<RowData> getFetcherCollector()

Overrides:

getFetcherCollector in class LookupJoinRunner