org.apache.flink.runtime.io.network

枚举 DataExchangeMode

java.lang.Object

java.lang.Enum<DataExchangeMode>

org.apache.flink.runtime.io.network.DataExchangeMode

所有已实现的接口:

Serializable, Comparable<DataExchangeMode>

public enum DataExchangeMode
extends Enum<DataExchangeMode>

Defines how the data exchange between two specific operators happens.

枚举常量概要

枚举常量

枚举常量和说明
BATCH The data exchange is decoupled.
PIPELINE_WITH_BATCH_FALLBACK The data exchange starts like in PIPELINED and falls back to BATCH for recovery runs.
PIPELINED The data exchange is streamed, sender and receiver are online at the same time, and the receiver back-pressures the sender.

方法概要

限定符和类型	方法和说明
static DataExchangeMode	getForForwardExchange(org.apache.flink.api.common.ExecutionMode mode)
static DataExchangeMode	getForShuffleOrBroadcast(org.apache.flink.api.common.ExecutionMode mode)
static DataExchangeMode	getPipelineBreakingExchange(org.apache.flink.api.common.ExecutionMode mode)
static DataExchangeMode	select(org.apache.flink.api.common.ExecutionMode executionMode, ShipStrategyType shipStrategy, boolean breakPipeline) Computes the mode of data exchange to be used for a given execution mode and ship strategy.
static DataExchangeMode	valueOf(String name) 返回带有指定名称的该类型的枚举常量。
static DataExchangeMode[]	values() 按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。

从类继承的方法 java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

从类继承的方法 java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

枚举常量详细资料

PIPELINED

public static final DataExchangeMode PIPELINED

The data exchange is streamed, sender and receiver are online at the same time, and the receiver back-pressures the sender.

BATCH

public static final DataExchangeMode BATCH

The data exchange is decoupled. The sender first produces its entire result and finishes. After that, the receiver is started and may consume the data.

PIPELINE_WITH_BATCH_FALLBACK

public static final DataExchangeMode PIPELINE_WITH_BATCH_FALLBACK

The data exchange starts like in PIPELINED and falls back to BATCH for recovery runs.

方法详细资料

values

public static DataExchangeMode[] values()

按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。该方法可用于迭代 常量, 如下所示:

for (DataExchangeMode c : DataExchangeMode.values())
    System.out.println(c);

返回:

按照声明该枚举类型的常量的顺序返回的包含这些常量的数组

valueOf

public static DataExchangeMode valueOf(String name)

返回带有指定名称的该类型的枚举常量。 字符串必须与用于声明该类型的枚举常量的 标识符完全匹配。(不允许有多余 的空格字符。)

参数:

name - 要返回的枚举常量的名称。

返回:

返回带有指定名称的枚举常量

抛出:

IllegalArgumentException - 如果该枚举类型没有带有指定名称的常量

NullPointerException - 如果参数为空值

getForForwardExchange

public static DataExchangeMode getForForwardExchange(org.apache.flink.api.common.ExecutionMode mode)

getForShuffleOrBroadcast

public static DataExchangeMode getForShuffleOrBroadcast(org.apache.flink.api.common.ExecutionMode mode)

getPipelineBreakingExchange

public static DataExchangeMode getPipelineBreakingExchange(org.apache.flink.api.common.ExecutionMode mode)

select

public static DataExchangeMode select(org.apache.flink.api.common.ExecutionMode executionMode,
                                      ShipStrategyType shipStrategy,
                                      boolean breakPipeline)

Computes the mode of data exchange to be used for a given execution mode and ship strategy. The type of the data exchange depends also on whether this connection has been identified to require pipeline breaking for deadlock avoidance.

• If the connection is set to be pipeline breaking, this returns the pipeline breaking variant of the execution mode getPipelineBreakingExchange(org.apache.flink.api.common.ExecutionMode).
• If the data exchange is a simple FORWARD (one-to-one communication), this returns getForForwardExchange(org.apache.flink.api.common.ExecutionMode).
• If otherwise, this returns getForShuffleOrBroadcast(org.apache.flink.api.common.ExecutionMode).

参数:

shipStrategy - The ship strategy (FORWARD, PARTITION, BROADCAST, ...) of the runtime data exchange.

返回:

The data exchange mode for the connection, given the concrete ship strategy.