org.apache.flink.streaming.api.functions.timestamps

类 AscendingTimestampExtractor<T>

java.lang.Object

org.apache.flink.streaming.api.functions.timestamps.AscendingTimestampExtractor<T>

类型参数:

T - The type of the elements that this function can extract timestamps from

所有已实现的接口:

Serializable, org.apache.flink.api.common.eventtime.TimestampAssigner<T>, org.apache.flink.api.common.functions.Function, AssignerWithPeriodicWatermarks<T>

直接已知子类:

AscendingTimestampExtractor

已过时。

@Deprecated
 @PublicEvolving
public abstract class AscendingTimestampExtractor<T>
extends Object
implements AssignerWithPeriodicWatermarks<T>

A timestamp assigner and watermark generator for streams where timestamps are monotonously ascending. In this case, the local watermarks for the streams are easy to generate, because they strictly follow the timestamps.

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	AscendingTimestampExtractor.FailingHandler 已过时。 Handler that fails the program when timestamp monotony is violated.
static class	AscendingTimestampExtractor.IgnoringHandler 已过时。 Handler that does nothing when timestamp monotony is violated.
static class	AscendingTimestampExtractor.LoggingHandler 已过时。 Handler that only logs violations of timestamp monotony, on WARN log level.
static interface	AscendingTimestampExtractor.MonotonyViolationHandler 已过时。 Interface for handlers that handle violations of the monotonous ascending timestamps property.

字段概要

从接口继承的字段 org.apache.flink.api.common.eventtime.TimestampAssigner

NO_TIMESTAMP

构造器概要

构造器

构造器和说明
AscendingTimestampExtractor() 已过时。

方法概要

限定符和类型	方法和说明
abstract long	extractAscendingTimestamp(T element) 已过时。 Extracts the timestamp from the given element.
long	extractTimestamp(T element, long elementPrevTimestamp) 已过时。 Assigns a timestamp to an element, in milliseconds since the Epoch.
Watermark	getCurrentWatermark() 已过时。 Returns the current watermark.
AscendingTimestampExtractor<T>	withViolationHandler(AscendingTimestampExtractor.MonotonyViolationHandler handler) 已过时。 Sets the handler for violations to the ascending timestamp order.

从类继承的方法 java.lang.Object

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

构造器详细资料

AscendingTimestampExtractor

public AscendingTimestampExtractor()

已过时。

方法详细资料

extractAscendingTimestamp

public abstract long extractAscendingTimestamp(T element)

已过时。

Extracts the timestamp from the given element. The timestamp must be monotonically increasing.

参数:

element - The element that the timestamp is extracted from.

返回:

The new timestamp.

withViolationHandler

public AscendingTimestampExtractor<T> withViolationHandler(AscendingTimestampExtractor.MonotonyViolationHandler handler)

已过时。

Sets the handler for violations to the ascending timestamp order.

参数:

handler - The violation handler to use.

返回:

This extractor.

extractTimestamp

public final long extractTimestamp(T element,
                                   long elementPrevTimestamp)

已过时。

从接口复制的说明: TimestampAssigner

Assigns a timestamp to an element, in milliseconds since the Epoch.

The method is passed the previously assigned timestamp of the element. That previous timestamp may have been assigned from a previous assigner, by ingestion time. If the element did not carry a timestamp before, this value is Long.MIN_VALUE.

指定者:

extractTimestamp 在接口中 org.apache.flink.api.common.eventtime.TimestampAssigner<T>

参数:

element - The element that the timestamp will be assigned to.

elementPrevTimestamp - The previous internal timestamp of the element, or a negative value, if no timestamp has been assigned yet.

返回:

The new timestamp.

getCurrentWatermark

public final Watermark getCurrentWatermark()

已过时。

从接口复制的说明: AssignerWithPeriodicWatermarks

Returns the current watermark. This method is periodically called by the system to retrieve the current watermark. The method may return null to indicate that no new Watermark is available.

The returned watermark will be emitted only if it is non-null and its timestamp is larger than that of the previously emitted watermark (to preserve the contract of ascending watermarks). If the current watermark is still identical to the previous one, no progress in event time has happened since the previous call to this method. If a null value is returned, or the timestamp of the returned watermark is smaller than that of the last emitted one, then no new watermark will be generated.

The interval in which this method is called and Watermarks are generated depends on ExecutionConfig.getAutoWatermarkInterval().

指定者:

getCurrentWatermark 在接口中 AssignerWithPeriodicWatermarks<T>

返回:

Null, if no watermark should be emitted, or the next watermark to emit.

另请参阅:

Watermark, ExecutionConfig.getAutoWatermarkInterval()