org.apache.flink.streaming.api.functions.query

类 QueryableAppendingStateOperator<IN>

java.lang.Object

org.apache.flink.streaming.api.operators.AbstractStreamOperator<IN>

org.apache.flink.streaming.api.functions.query.QueryableAppendingStateOperator<IN>

类型参数:

IN - Input type

所有已实现的接口:

Serializable, org.apache.flink.api.common.state.CheckpointListener, Input<IN>, KeyContext, OneInputStreamOperator<IN,IN>, SetupableStreamOperator<IN>, StreamOperator<IN>, StreamOperatorStateHandler.CheckpointedStreamOperator

@Internal
public class QueryableAppendingStateOperator<IN>
extends AbstractStreamOperator<IN>

Internal operator handling queryable AppendingState instances.

另请参阅:

序列化表格

字段概要

字段

限定符和类型	字段和说明
protected String	registrationName Name under which the queryable state is registered.
protected S	state The state instance created on open.
protected org.apache.flink.api.common.state.StateDescriptor<? extends S,?>	stateDescriptor State descriptor for the queryable state instance.

从类继承的字段 org.apache.flink.streaming.api.operators.AbstractStreamOperator

chainingStrategy, config, latencyStats, LOG, metrics, output, processingTimeService

构造器概要

构造器

构造器和说明
QueryableAppendingStateOperator(String registrationName, org.apache.flink.api.common.state.StateDescriptor<? extends org.apache.flink.api.common.state.AppendingState<IN,?>,?> stateDescriptor)

方法概要

限定符和类型	方法和说明
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	processElement(StreamRecord<IN> element) Processes one element that arrived on this input of the MultipleInputStreamOperator.

从类继承的方法 org.apache.flink.streaming.api.operators.AbstractStreamOperator

close, finish, getChainingStrategy, getContainingTask, getCurrentKey, getExecutionConfig, getInternalTimerService, getKeyedStateBackend, getKeyedStateStore, getMetricGroup, getOperatorConfig, getOperatorID, getOperatorName, getOperatorStateBackend, getOrCreateKeyedState, getPartitionedState, getPartitionedState, getProcessingTimeService, getRuntimeContext, getTimeServiceManager, getUserCodeClassloader, initializeState, initializeState, isUsingCustomRawKeyedState, notifyCheckpointAborted, notifyCheckpointComplete, prepareSnapshotPreBarrier, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processWatermark, processWatermark1, processWatermark2, processWatermarkStatus, processWatermarkStatus1, processWatermarkStatus2, registerCounterOnOutput, reportOrForwardLatencyMarker, setChainingStrategy, setCurrentKey, setKeyContextElement1, setKeyContextElement2, setProcessingTimeService, setup, snapshotState, snapshotState

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 org.apache.flink.streaming.api.operators.OneInputStreamOperator

setKeyContextElement

从接口继承的方法 org.apache.flink.streaming.api.operators.StreamOperator

close, finish, getMetricGroup, getOperatorID, initializeState, prepareSnapshotPreBarrier, setKeyContextElement1, setKeyContextElement2, snapshotState

从接口继承的方法 org.apache.flink.api.common.state.CheckpointListener

notifyCheckpointAborted, notifyCheckpointComplete

从接口继承的方法 org.apache.flink.streaming.api.operators.KeyContext

getCurrentKey, setCurrentKey

从接口继承的方法 org.apache.flink.streaming.api.operators.Input

processLatencyMarker, processWatermark, processWatermarkStatus

字段详细资料

stateDescriptor

protected final org.apache.flink.api.common.state.StateDescriptor<? extends S extends org.apache.flink.api.common.state.State,?> stateDescriptor

State descriptor for the queryable state instance.

registrationName

protected final String registrationName

Name under which the queryable state is registered.

state

protected transient S extends org.apache.flink.api.common.state.State state

The state instance created on open. This is updated by the subclasses of this class, because the state update interface depends on the state type (e.g. AppendingState#add(IN) vs. ValueState#update(OUT)).

构造器详细资料

QueryableAppendingStateOperator

public QueryableAppendingStateOperator(String registrationName,
                                       org.apache.flink.api.common.state.StateDescriptor<? extends org.apache.flink.api.common.state.AppendingState<IN,?>,?> stateDescriptor)

方法详细资料

processElement

public void processElement(StreamRecord<IN> element)
                    throws Exception

从接口复制的说明: Input

Processes one element that arrived on this input of the MultipleInputStreamOperator. This method is guaranteed to not be called concurrently with other methods of the operator.

抛出:

Exception

open

public void open()
          throws Exception

从类复制的说明: AbstractStreamOperator

This method is called immediately before any elements are processed, it should contain the operator's initialization logic, e.g. state initialization.

The default implementation does nothing.

指定者:

open 在接口中 StreamOperator<IN>

覆盖:

open 在类中 AbstractStreamOperator<IN>

抛出:

Exception - An exception in this method causes the operator to fail.