public abstract class AbstractTopNFunction extends KeyedProcessFunction<RowData,RowData,RowData>
KeyedProcessFunction.Context, KeyedProcessFunction.OnTimerContext
Modifier and Type | Field and Description |
---|---|
protected long |
hitCount |
protected InternalTypeInfo<RowData> |
inputRowType |
protected KeyContext |
keyContext |
protected boolean |
outputRankNumber |
protected long |
rankEnd |
protected long |
requestCount |
protected Comparator<RowData> |
sortKeyComparator |
protected KeySelector<RowData,RowData> |
sortKeySelector |
protected StateTtlConfig |
ttlConfig |
Modifier and Type | Method and Description |
---|---|
protected boolean |
checkSortKeyInBufferRange(RowData sortKey,
TopNBuffer buffer)
Checks whether the record should be put into the buffer.
|
protected void |
collectDelete(Collector<RowData> out,
RowData inputRow) |
protected void |
collectDelete(Collector<RowData> out,
RowData inputRow,
long rank) |
protected void |
collectInsert(Collector<RowData> out,
RowData inputRow) |
protected void |
collectInsert(Collector<RowData> out,
RowData inputRow,
long rank) |
protected void |
collectUpdateAfter(Collector<RowData> out,
RowData inputRow) |
protected void |
collectUpdateAfter(Collector<RowData> out,
RowData inputRow,
long rank) |
protected void |
collectUpdateBefore(Collector<RowData> out,
RowData inputRow) |
protected void |
collectUpdateBefore(Collector<RowData> out,
RowData inputRow,
long rank) |
protected long |
getDefaultTopNSize()
Gets default topN size.
|
protected boolean |
hasOffset() |
protected long |
initRankEnd(RowData row)
Initialize rank end.
|
protected boolean |
isInRankEnd(long rank) |
protected boolean |
isInRankRange(long rank) |
void |
open(OpenContext openContext)
Initialization method for the function.
|
protected void |
registerMetric(long heapSize) |
void |
setKeyContext(KeyContext keyContext)
Sets keyContext to RankFunction.
|
onTimer, processElement
close, getIterationRuntimeContext, getRuntimeContext, open, setRuntimeContext
protected final StateTtlConfig ttlConfig
protected Comparator<RowData> sortKeyComparator
protected final boolean outputRankNumber
protected final InternalTypeInfo<RowData> inputRowType
protected final KeySelector<RowData,RowData> sortKeySelector
protected KeyContext keyContext
protected long rankEnd
protected long hitCount
protected long requestCount
public void open(OpenContext openContext) throws Exception
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)
.
openContext
- The context containing information about the context in which the function
is opened.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.protected long getDefaultTopNSize()
protected long initRankEnd(RowData row) throws Exception
row
- input recordException
protected boolean checkSortKeyInBufferRange(RowData sortKey, TopNBuffer buffer)
sortKey
- sortKey to testbuffer
- buffer to addprotected void registerMetric(long heapSize)
protected void collectUpdateAfter(Collector<RowData> out, RowData inputRow, long rank)
protected void collectUpdateBefore(Collector<RowData> out, RowData inputRow, long rank)
protected boolean isInRankEnd(long rank)
protected boolean isInRankRange(long rank)
protected boolean hasOffset()
public void setKeyContext(KeyContext keyContext)
keyContext
- keyContext of current function.Copyright © 2014–2024 The Apache Software Foundation. All rights reserved.