org.apache.flink.runtime.io.network.buffer

枚举 Buffer.DataType

java.lang.Object

java.lang.Enum<Buffer.DataType>

org.apache.flink.runtime.io.network.buffer.Buffer.DataType

所有已实现的接口:

Serializable, Comparable<Buffer.DataType>

封闭接口:

Buffer

public static enum Buffer.DataType
extends Enum<Buffer.DataType>

Used to identify the type of data contained in the Buffer so that we can get the information without deserializing the serialized data.

Notes: Currently, one byte is used to serialize the ordinal of Buffer.DataType in NettyMessage.BufferResponse, so the maximum number of supported data types is 128.

枚举常量概要

枚举常量

枚举常量和说明
ALIGNED_CHECKPOINT_BARRIER ALIGNED_CHECKPOINT_BARRIER indicates that this buffer represents a serialized checkpoint barrier of aligned exactly-once checkpoint mode.
DATA_BUFFER DATA_BUFFER indicates that this buffer represents a non-event data buffer.
EVENT_BUFFER EVENT_BUFFER indicates that this buffer represents serialized data of an event.
NONE NONE indicates that there is no buffer.
PRIORITIZED_EVENT_BUFFER Same as EVENT_BUFFER, but the event has been prioritized (e.g. it skipped buffers).
RECOVERY_COMPLETION Indicates that this subpartition state is fully recovered (emitted).
TIMEOUTABLE_ALIGNED_CHECKPOINT_BARRIER TIMEOUTABLE_ALIGNED_CHECKPOINT_BARRIER indicates that this buffer represents a serialized checkpoint barrier of aligned exactly-once checkpoint mode, that can be time-out'ed to an unaligned checkpoint barrier.

方法概要

限定符和类型	方法和说明
static Buffer.DataType	getDataType(AbstractEvent event, boolean hasPriority)
boolean	hasPriority()
boolean	isBlockingUpstream()
boolean	isBuffer()
boolean	isEvent()
boolean	requiresAnnouncement()
static Buffer.DataType	valueOf(String name) 返回带有指定名称的该类型的枚举常量。
static Buffer.DataType[]	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

NONE

public static final Buffer.DataType NONE

NONE indicates that there is no buffer.

DATA_BUFFER

public static final Buffer.DataType DATA_BUFFER

DATA_BUFFER indicates that this buffer represents a non-event data buffer.

EVENT_BUFFER

public static final Buffer.DataType EVENT_BUFFER

EVENT_BUFFER indicates that this buffer represents serialized data of an event. Note that this type can be further divided into more fine-grained event types like ALIGNED_CHECKPOINT_BARRIER and etc.

PRIORITIZED_EVENT_BUFFER

public static final Buffer.DataType PRIORITIZED_EVENT_BUFFER

Same as EVENT_BUFFER, but the event has been prioritized (e.g. it skipped buffers).

ALIGNED_CHECKPOINT_BARRIER

public static final Buffer.DataType ALIGNED_CHECKPOINT_BARRIER

ALIGNED_CHECKPOINT_BARRIER indicates that this buffer represents a serialized checkpoint barrier of aligned exactly-once checkpoint mode.

TIMEOUTABLE_ALIGNED_CHECKPOINT_BARRIER

public static final Buffer.DataType TIMEOUTABLE_ALIGNED_CHECKPOINT_BARRIER

TIMEOUTABLE_ALIGNED_CHECKPOINT_BARRIER indicates that this buffer represents a serialized checkpoint barrier of aligned exactly-once checkpoint mode, that can be time-out'ed to an unaligned checkpoint barrier.

RECOVERY_COMPLETION

public static final Buffer.DataType RECOVERY_COMPLETION

Indicates that this subpartition state is fully recovered (emitted). Further data can be consumed after unblocking.

方法详细资料

values

public static Buffer.DataType[] 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 (Buffer.DataType c : Buffer.DataType.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 Buffer.DataType 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

isBuffer

public boolean isBuffer()

isEvent

public boolean isEvent()

hasPriority

public boolean hasPriority()

isBlockingUpstream

public boolean isBlockingUpstream()

requiresAnnouncement

public boolean requiresAnnouncement()

getDataType

public static Buffer.DataType getDataType(AbstractEvent event,
                                          boolean hasPriority)