OUT
- The output type of the operatorF
- The type of the user function@PublicEvolving public abstract class AbstractUdfStreamOperator<OUT,F extends org.apache.flink.api.common.functions.Function> extends AbstractStreamOperator<OUT> implements OutputTypeConfigurable<OUT>
AbstractStreamOperator.CountingOutput<OUT>
限定符和类型 | 字段和说明 |
---|---|
protected F |
userFunction
The user function.
|
chainingStrategy, config, latencyStats, LOG, metrics, output, timeServiceManager
构造器和说明 |
---|
AbstractUdfStreamOperator(F userFunction) |
限定符和类型 | 方法和说明 |
---|---|
void |
close()
This method is called after all records have been added to the operators via the methods
OneInputStreamOperator.processElement(StreamRecord) , or
TwoInputStreamOperator.processElement1(StreamRecord) and
TwoInputStreamOperator.processElement2(StreamRecord) . |
void |
dispose()
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.
|
F |
getUserFunction()
Gets the user function executed in this operator.
|
org.apache.flink.configuration.Configuration |
getUserFunctionParameters()
Since the streaming API does not implement any parametrization of functions via a
configuration, the config returned here is actually empty.
|
void |
initializeState(org.apache.flink.runtime.state.StateInitializationContext context)
Stream operators with state which can be restored need to override this hook method.
|
void |
notifyCheckpointComplete(long checkpointId) |
void |
open()
This method is called immediately before any elements are processed, it should contain the
operator's initialization logic, e.g. state initialization.
|
void |
setOutputType(org.apache.flink.api.common.typeinfo.TypeInformation<OUT> outTypeInfo,
org.apache.flink.api.common.ExecutionConfig executionConfig)
Is called by the
org.apache.flink.streaming.api.graph.StreamGraph#addOperator(Integer, String, StreamOperator, TypeInformation, TypeInformation, String)
method when the StreamGraph is generated. |
void |
setup(StreamTask<?,?> containingTask,
StreamConfig config,
Output<StreamRecord<OUT>> output)
Initializes the operator.
|
void |
snapshotState(org.apache.flink.runtime.state.StateSnapshotContext context)
Stream operators with state, which want to participate in a snapshot need to override this hook method.
|
getChainingStrategy, getContainingTask, getCurrentKey, getExecutionConfig, getInternalTimerService, getKeyedStateBackend, getKeyedStateStore, getMetricGroup, getOperatorConfig, getOperatorID, getOperatorName, getOperatorStateBackend, getOrCreateKeyedState, getPartitionedState, getPartitionedState, getProcessingTimeService, getRuntimeContext, getUserCodeClassloader, initializeState, numEventTimeTimers, numProcessingTimeTimers, prepareSnapshotPreBarrier, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processWatermark, processWatermark1, processWatermark2, reportOrForwardLatencyMarker, setChainingStrategy, setCurrentKey, setKeyContextElement1, setKeyContextElement2, snapshotState
protected final F extends org.apache.flink.api.common.functions.Function userFunction
public AbstractUdfStreamOperator(F userFunction)
public F getUserFunction()
public void setup(StreamTask<?,?> containingTask, StreamConfig config, Output<StreamRecord<OUT>> output)
StreamOperator
setup
在接口中 StreamOperator<OUT>
setup
在类中 AbstractStreamOperator<OUT>
public void snapshotState(org.apache.flink.runtime.state.StateSnapshotContext context) throws Exception
AbstractStreamOperator
snapshotState
在类中 AbstractStreamOperator<OUT>
context
- context that provides information and means required for taking a snapshotException
public void initializeState(org.apache.flink.runtime.state.StateInitializationContext context) throws Exception
AbstractStreamOperator
initializeState
在类中 AbstractStreamOperator<OUT>
context
- context that allows to register different states.Exception
public void open() throws Exception
AbstractStreamOperator
The default implementation does nothing.
open
在接口中 StreamOperator<OUT>
open
在类中 AbstractStreamOperator<OUT>
Exception
- An exception in this method causes the operator to fail.public void close() throws Exception
AbstractStreamOperator
OneInputStreamOperator.processElement(StreamRecord)
, or
TwoInputStreamOperator.processElement1(StreamRecord)
and
TwoInputStreamOperator.processElement2(StreamRecord)
.
The method is expected to flush all remaining buffered data. Exceptions during this flushing of buffered should be propagated, in order to cause the operation to be recognized asa failed, because the last data items are not processed properly.
close
在接口中 StreamOperator<OUT>
close
在类中 AbstractStreamOperator<OUT>
Exception
- An exception in this method causes the operator to fail.public void dispose() throws Exception
AbstractStreamOperator
This method is expected to make a thorough effort to release all resources that the operator has acquired.
dispose
在接口中 StreamOperator<OUT>
dispose
在接口中 org.apache.flink.util.Disposable
dispose
在类中 AbstractStreamOperator<OUT>
Exception
public void notifyCheckpointComplete(long checkpointId) throws Exception
notifyCheckpointComplete
在接口中 org.apache.flink.runtime.state.CheckpointListener
notifyCheckpointComplete
在类中 AbstractStreamOperator<OUT>
Exception
public void setOutputType(org.apache.flink.api.common.typeinfo.TypeInformation<OUT> outTypeInfo, org.apache.flink.api.common.ExecutionConfig executionConfig)
OutputTypeConfigurable
org.apache.flink.streaming.api.graph.StreamGraph#addOperator(Integer, String, StreamOperator, TypeInformation, TypeInformation, String)
method when the StreamGraph
is generated. The
method is called with the output TypeInformation
which is also used for the
StreamTask
output serializer.setOutputType
在接口中 OutputTypeConfigurable<OUT>
outTypeInfo
- Output type information of the StreamTask
executionConfig
- Execution configurationpublic org.apache.flink.configuration.Configuration getUserFunctionParameters()
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