org.apache.flink.api.java.operators

类 Operator<OUT,O extends Operator<OUT,O>>

java.lang.Object

org.apache.flink.api.java.DataSet<OUT>

org.apache.flink.api.java.operators.Operator<OUT,O>

类型参数:

OUT - The type of the data set produced by this operator.

O - The type of the operator, so that we can return it.

直接已知子类:

DataSource, SingleInputOperator, TwoInputOperator

@Public
public abstract class Operator<OUT,O extends Operator<OUT,O>>
extends DataSet<OUT>

Base class of all operators in the Java API.

字段概要

字段

限定符和类型	字段和说明
protected org.apache.flink.api.common.operators.ResourceSpec	minResources
protected String	name
protected int	parallelism
protected org.apache.flink.api.common.operators.ResourceSpec	preferredResources

从类继承的字段 org.apache.flink.api.java.DataSet

context

构造器概要

构造器

限定符	构造器和说明
protected	Operator(ExecutionEnvironment context, org.apache.flink.api.common.typeinfo.TypeInformation<OUT> resultType)

方法概要

限定符和类型	方法和说明
org.apache.flink.api.common.operators.ResourceSpec	getMinResources() Returns the minimum resource of this operator.
String	getName() Returns the name of the operator.
int	getParallelism() Returns the parallelism of this operator.
org.apache.flink.api.common.operators.ResourceSpec	getPreferredResources() Returns the preferred resource of this operator.
org.apache.flink.api.common.typeinfo.TypeInformation<OUT>	getResultType() Returns the type of the result of this operator.
O	name(String newName) Sets the name of this operator.
O	setParallelism(int parallelism) Sets the parallelism for this operator.

从类继承的方法 org.apache.flink.api.java.DataSet

aggregate, checkSameExecutionContext, clean, coGroup, collect, combineGroup, count, cross, crossWithHuge, crossWithTiny, distinct, distinct, distinct, distinct, fillInType, filter, first, flatMap, fullOuterJoin, fullOuterJoin, getExecutionEnvironment, getType, groupBy, groupBy, groupBy, iterate, iterateDelta, join, join, joinWithHuge, joinWithTiny, leftOuterJoin, leftOuterJoin, map, mapPartition, max, maxBy, min, minBy, output, partitionByHash, partitionByHash, partitionByHash, partitionByRange, partitionByRange, partitionByRange, partitionCustom, partitionCustom, partitionCustom, print, print, printOnTaskManager, printToErr, printToErr, project, rebalance, reduce, reduceGroup, rightOuterJoin, rightOuterJoin, runOperation, sortPartition, sortPartition, sortPartition, sum, union, write, write, writeAsCsv, writeAsCsv, writeAsCsv, writeAsCsv, writeAsFormattedText, writeAsFormattedText, writeAsText, writeAsText

从类继承的方法 java.lang.Object

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

字段详细资料

name

protected String name

parallelism

protected int parallelism

minResources

protected org.apache.flink.api.common.operators.ResourceSpec minResources

preferredResources

protected org.apache.flink.api.common.operators.ResourceSpec preferredResources

构造器详细资料

Operator

protected Operator(ExecutionEnvironment context,
                   org.apache.flink.api.common.typeinfo.TypeInformation<OUT> resultType)

方法详细资料

getResultType

public org.apache.flink.api.common.typeinfo.TypeInformation<OUT> getResultType()

Returns the type of the result of this operator.

返回:

The result type of the operator.

getName

public String getName()

Returns the name of the operator. If no name has been set, it returns the name of the operation, or the name of the class implementing the function of this operator.

返回:

The name of the operator.

getParallelism

public int getParallelism()

Returns the parallelism of this operator.

返回:

The parallelism of this operator.

getMinResources

public org.apache.flink.api.common.operators.ResourceSpec getMinResources()

Returns the minimum resource of this operator. If no minimum resource has been set, it returns the default empty resource.

返回:

The minimum resource of this operator.

getPreferredResources

public org.apache.flink.api.common.operators.ResourceSpec getPreferredResources()

Returns the preferred resource of this operator. If no preferred resource has been set, it returns the default empty resource.

返回:

The preferred resource of this operator.

name

public O name(String newName)

Sets the name of this operator. This overrides the default name, which is either a generated description of the operation (such as for example "Aggregate(1:SUM, 2:MIN)") or the name the user-defined function or input/output format executed by the operator.

参数:

newName - The name for this operator.

返回:

The operator with a new name.

setParallelism

public O setParallelism(int parallelism)

Sets the parallelism for this operator. The parallelism must be 1 or more.

参数:

parallelism - The parallelism for this operator. A value equal to ExecutionConfig.PARALLELISM_DEFAULT will use the system default.

返回:

The operator with set parallelism.