public class PatternProcessFunctionRunner extends PatternProcessFunction<RowData,RowData>
PatternProcessFunction
wrapper to delegate invocation to the code generated PatternProcessFunction
.PatternProcessFunction.Context
Constructor and Description |
---|
PatternProcessFunctionRunner(GeneratedFunction<PatternProcessFunction<RowData,RowData>> generatedFunction) |
Modifier and Type | Method and Description |
---|---|
void |
close()
Tear-down method for the user code.
|
void |
open(Configuration parameters)
Initialization method for the function.
|
void |
processMatch(Map<String,List<RowData>> match,
PatternProcessFunction.Context ctx,
Collector<RowData> out)
Generates resulting elements given a map of detected pattern events.
|
getIterationRuntimeContext, getRuntimeContext, setRuntimeContext
public PatternProcessFunctionRunner(GeneratedFunction<PatternProcessFunction<RowData,RowData>> generatedFunction)
public void open(Configuration parameters) throws Exception
RichFunction
The configuration object passed to the function can be used for configuration and initialization. The configuration contains all parameters that were configured on the function in the program composition.
public class MyFilter extends RichFilterFunction<String> {
private String searchString;
public void open(Configuration parameters) {
this.searchString = parameters.getString("foo");
}
public boolean filter(String value) {
return value.equals(searchString);
}
}
By default, this method does nothing.
open
in interface RichFunction
open
in class AbstractRichFunction
parameters
- The configuration containing the parameters attached to the contract.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.Configuration
public void processMatch(Map<String,List<RowData>> match, PatternProcessFunction.Context ctx, Collector<RowData> out) throws Exception
PatternProcessFunction
TimeContext.timestamp()
in this case returns the time of the
last element that was assigned to the match, resulting in this partial match being finished.
processMatch
in class PatternProcessFunction<RowData,RowData>
match
- map containing the found pattern. Events are identified by their names.ctx
- enables access to time features and emitting results through side outputsout
- Collector used to output the generated elementsException
- This method may throw exceptions. Throwing an exception will cause the
operation to fail and may trigger recovery.public void close() throws Exception
RichFunction
This method can be used for clean up work.
close
in interface RichFunction
close
in class AbstractRichFunction
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.Copyright © 2014–2024 The Apache Software Foundation. All rights reserved.