org.apache.flink.streaming.api.operators

类 InputSelection

java.lang.Object

org.apache.flink.streaming.api.operators.InputSelection

所有已实现的接口:

Serializable

@PublicEvolving
public final class InputSelection
extends Object
implements Serializable

Describe the input selection that stream operators want to read records.

另请参阅:

序列化表格

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	InputSelection.Builder Utility class for creating InputSelection.

字段概要

字段

限定符和类型	字段和说明
static InputSelection	ALL The InputSelection instance which indicates to select all inputs.
static InputSelection	FIRST The InputSelection instance which indicates to select the first input.
static InputSelection	SECOND The InputSelection instance which indicates to select the second input.

方法概要

限定符和类型	方法和说明
boolean	areAllInputsSelected() Tests if all inputs are selected.
boolean	equals(Object o)
int	fairSelectNextIndexOutOf2(int availableInputsMask, int lastReadInputIndex) Fairly select one of the two inputs for reading.
long	getInputMask()
boolean	isALLMaskOf2() Tells whether or not the input mask includes all of two inputs.
boolean	isInputSelected(int inputId) Tests if the input specified by inputId is selected.
String	toString()

从类继承的方法 java.lang.Object

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

字段详细资料

ALL

public static final InputSelection ALL

The InputSelection instance which indicates to select all inputs.

FIRST

public static final InputSelection FIRST

The InputSelection instance which indicates to select the first input.

SECOND

public static final InputSelection SECOND

The InputSelection instance which indicates to select the second input.

方法详细资料

getInputMask

public long getInputMask()

isInputSelected

public boolean isInputSelected(int inputId)

Tests if the input specified by inputId is selected.

参数:

inputId - The input id, see the description of inputId in InputSelection.Builder.select(int).

返回:

true if the input is selected, false otherwise.

areAllInputsSelected

public boolean areAllInputsSelected()

Tests if all inputs are selected.

返回:

true if the input mask equals -1, false otherwise.

isALLMaskOf2

public boolean isALLMaskOf2()

Tells whether or not the input mask includes all of two inputs.

返回:

true if the input mask includes all of two inputs, false otherwise.

fairSelectNextIndexOutOf2

public int fairSelectNextIndexOutOf2(int availableInputsMask,
                                     int lastReadInputIndex)

Fairly select one of the two inputs for reading. When inputMask includes two inputs and both inputs are available, alternately select one of them. Otherwise, select the available one of inputMask, or return -1 to indicate no input is selected.

Note that this supports only two inputs for performance reasons.

参数:

availableInputsMask - The mask of all available inputs.

lastReadInputIndex - The index of last read input.

返回:

the index of the input for reading or -1, and -1 indicates no input is selected ( inputMask is empty or the inputs in inputMask are unavailable).

equals

public boolean equals(Object o)

覆盖:

equals 在类中 Object

toString

public String toString()

覆盖:

toString 在类中 Object