public class LookupJoinRunner extends ProcessFunction<BaseRow,BaseRow>
ProcessFunction.Context, ProcessFunction.OnTimerContext
Modifier and Type | Field and Description |
---|---|
protected TableFunctionCollector<BaseRow> |
collector |
Constructor and Description |
---|
LookupJoinRunner(GeneratedFunction<FlatMapFunction<BaseRow,BaseRow>> generatedFetcher,
GeneratedCollector<TableFunctionCollector<BaseRow>> generatedCollector,
boolean isLeftOuterJoin,
int tableFieldsCount) |
Modifier and Type | Method and Description |
---|---|
void |
close()
Tear-down method for the user code.
|
Collector<BaseRow> |
getFetcherCollector() |
void |
open(Configuration parameters)
Initialization method for the function.
|
void |
processElement(BaseRow in,
ProcessFunction.Context ctx,
Collector<BaseRow> out)
Process one element from the input stream.
|
onTimer
getIterationRuntimeContext, getRuntimeContext, setRuntimeContext
protected transient TableFunctionCollector<BaseRow> collector
public LookupJoinRunner(GeneratedFunction<FlatMapFunction<BaseRow,BaseRow>> generatedFetcher, GeneratedCollector<TableFunctionCollector<BaseRow>> generatedCollector, boolean isLeftOuterJoin, int tableFieldsCount)
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 processElement(BaseRow in, ProcessFunction.Context ctx, Collector<BaseRow> out) throws Exception
ProcessFunction
This function can output zero or more elements using the Collector
parameter
and also update internal state or set timers using the ProcessFunction.Context
parameter.
processElement
in class ProcessFunction<BaseRow,BaseRow>
in
- The input value.ctx
- A ProcessFunction.Context
that allows querying the timestamp of the element and getting
a TimerService
for registering timers and querying the time. The
context is only valid during the invocation of this method, do not store it.out
- The collector for returning result values.Exception
- 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 © 2014–2020 The Apache Software Foundation. All rights reserved.