public static class BulkIterationBase.TerminationCriterionMapper<X> extends AbstractRichFunction implements FlatMapFunction<X,X>
Constructor and Description |
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TerminationCriterionMapper() |
Modifier and Type | Method and Description |
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void |
flatMap(X in,
Collector<X> out)
The core method of the FlatMapFunction.
|
void |
open(OpenContext openContext)
Initialization method for the function.
|
close, getIterationRuntimeContext, getRuntimeContext, open, setRuntimeContext
public void open(OpenContext openContext)
RichFunction
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)
.
open
in interface RichFunction
openContext
- The context containing information about the context in which the function
is opened.public void flatMap(X in, Collector<X> out)
FlatMapFunction
flatMap
in interface FlatMapFunction<X,X>
in
- The input value.out
- The collector for returning result values.Copyright © 2014–2024 The Apache Software Foundation. All rights reserved.