CollectSinkOperator (Flink : Runtime 2.1.0 API)

java.lang.Object
- org.apache.flink.streaming.api.operators.AbstractStreamOperator<OUT>
- - org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator<Object,SinkFunction<IN>>
  - - org.apache.flink.streaming.api.operators.StreamSink<IN>
    - - org.apache.flink.streaming.api.operators.collect.CollectSinkOperator<IN>

Type Parameters:

IN - type of results to be written into the sink.

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.state.CheckpointListener, OperatorEventHandler, Input<IN>, KeyContext, KeyContextHandler, OneInputStreamOperator<IN,Object>, org.apache.flink.streaming.api.operators.OutputTypeConfigurable<Object>, StreamOperator<Object>, StreamOperatorStateHandler.CheckpointedStreamOperator, UserFunctionProvider<SinkFunction<IN>>, YieldingOperator<Object>
```
public class CollectSinkOperator<IN>
extends StreamSink<IN>
implements OperatorEventHandler
```
A StreamSink that collects query results and sends them back to the client.

See Also:

Serialized Form

Field Summary
- Fields inherited from class org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator
  userFunction
- Fields inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator
  combinedWatermark, config, lastRecordAttributes1, lastRecordAttributes2, latencyStats, LOG, metrics, output, processingTimeService, stateHandler, stateKeySelector1, stateKeySelector2, timeServiceManager

Constructor Summary

Constructors
Constructor	Description
`CollectSinkOperator(org.apache.flink.api.common.typeutils.TypeSerializer<IN> serializer, long maxBytesPerBatch, String accumulatorName)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`close()`	This method is called at the very end of the operator's life, both in the case of a successful completion of the operation, and in the case of a failure and canceling.
`void`	`handleOperatorEvent(OperatorEvent evt)`

Methods inherited from class org.apache.flink.streaming.api.operators.StreamSink
open, processElement, processWatermark, reportOrForwardLatencyMarker

Methods inherited from class org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator
finish, getUserFunction, getUserFunctionParameters, initializeState, notifyCheckpointAborted, notifyCheckpointComplete, setOutputType, setup, snapshotState

Methods inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator
beforeInitializeStateHandler, getContainingTask, getCurrentKey, getExecutionConfig, getInternalTimerService, getKeyedStateBackend, getKeyedStateStore, getMetricGroup, getOperatorConfig, getOperatorID, getOperatorName, getOperatorStateBackend, getOrCreateKeyedState, getPartitionedState, getPartitionedState, getProcessingTimeService, getRuntimeContext, getStateKeySelector1, getStateKeySelector2, getTimeServiceManager, getUserCodeClassloader, hasKeyContext1, hasKeyContext2, initializeState, isAsyncKeyOrderedProcessingEnabled, isUsingCustomRawKeyedState, prepareSnapshotPreBarrier, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processRecordAttributes, processRecordAttributes1, processRecordAttributes2, processWatermark, processWatermark1, processWatermark1, processWatermark2, processWatermark2, processWatermarkStatus, processWatermarkStatus, processWatermarkStatus1, processWatermarkStatus2, setCurrentKey, setKeyContextElement1, setKeyContextElement2, setMailboxExecutor, setProcessingTimeService, snapshotState, useSplittableTimers

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.flink.api.common.state.CheckpointListener
notifyCheckpointAborted, notifyCheckpointComplete

Methods inherited from interface org.apache.flink.streaming.api.operators.Input
processLatencyMarker, processRecordAttributes, processWatermark, processWatermarkStatus

Methods inherited from interface org.apache.flink.streaming.api.operators.KeyContext
getCurrentKey, setCurrentKey

Methods inherited from interface org.apache.flink.streaming.api.operators.KeyContextHandler
hasKeyContext

Methods inherited from interface org.apache.flink.streaming.api.operators.OneInputStreamOperator
setKeyContextElement

Methods inherited from interface org.apache.flink.streaming.api.operators.StreamOperator
finish, getMetricGroup, getOperatorAttributes, getOperatorID, initializeState, prepareSnapshotPreBarrier, setKeyContextElement1, setKeyContextElement2, snapshotState

- Constructor Detail
  - CollectSinkOperator
```
public CollectSinkOperator(org.apache.flink.api.common.typeutils.TypeSerializer<IN> serializer,
                           long maxBytesPerBatch,
                           String accumulatorName)
```
- Method Detail
  - handleOperatorEvent
```
public void handleOperatorEvent(OperatorEvent evt)
```
    Specified by:
    
    handleOperatorEvent in interface OperatorEventHandler
  - close
```
public void close()
           throws Exception
```
    Description copied from interface: StreamOperator
    
    This method is called at the very end of the operator's life, both in the case of a successful completion of the operation, and in the case of a failure and canceling.
    This method is expected to make a thorough effort to release all resources that the operator has acquired.
    NOTE:It can not emit any records! If you need to emit records at the end of processing, do so in the StreamOperator.finish() method.
    
    Specified by:
    
    close in interface StreamOperator<IN>
    
    Overrides:
    
    close in class AbstractUdfStreamOperator<Object,SinkFunction<IN>>
    
    Throws:
    
    Exception