SlidingProcessingTimeWindows (Flink : Streaming Java 1.20.1 API)

java.lang.Object
- org.apache.flink.streaming.api.windowing.assigners.WindowAssigner<Object,TimeWindow>
- - org.apache.flink.streaming.api.windowing.assigners.SlidingProcessingTimeWindows

All Implemented Interfaces:: Serializable

@PublicEvolving
public class SlidingProcessingTimeWindows
extends WindowAssigner<Object,TimeWindow>

A WindowAssigner that windows elements into sliding windows based on the current system time of the machine the operation is running on. Windows can possibly overlap.

For example, in order to window into windows of 1 minute, every 10 seconds:


 DataStream<Tuple2<String, Integer>> in = ...;
 KeyedStream<String, Tuple2<String, Integer>> keyed = in.keyBy(...);
 WindowedStream<Tuple2<String, Integer>, String, TimeWindows> windowed =
   keyed.window(SlidingProcessingTimeWindows.of(Time.of(1, MINUTES), Time.of(10, SECONDS));

See Also:: Serialized Form

Nested Class Summary
- Nested classes/interfaces inherited from class org.apache.flink.streaming.api.windowing.assigners.WindowAssigner
  WindowAssigner.WindowAssignerContext

Method Summary

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`Collection<TimeWindow>`	`assignWindows(Object element, long timestamp, WindowAssigner.WindowAssignerContext context)` Returns a `Collection` of windows that should be assigned to the element.
`Trigger<Object,TimeWindow>`	`getDefaultTrigger()` Returns the default trigger associated with this `WindowAssigner`.
`Trigger<Object,TimeWindow>`	`getDefaultTrigger(StreamExecutionEnvironment env)` Returns the default trigger associated with this `WindowAssigner`.
`long`	`getSize()`
`long`	`getSlide()`
`org.apache.flink.api.common.typeutils.TypeSerializer<TimeWindow>`	`getWindowSerializer(org.apache.flink.api.common.ExecutionConfig executionConfig)` Returns a `TypeSerializer` for serializing windows that are assigned by this `WindowAssigner`.
`boolean`	`isEventTime()` Returns `true` if elements are assigned to windows based on event time, `false` otherwise.
`static SlidingProcessingTimeWindows`	`of(Duration size, Duration slide)` Creates a new `SlidingProcessingTimeWindows` `WindowAssigner` that assigns elements to sliding time windows based on the element timestamp.
`static SlidingProcessingTimeWindows`	`of(Duration size, Duration slide, Duration offset)` Creates a new `SlidingProcessingTimeWindows` `WindowAssigner` that assigns elements to time windows based on the element timestamp and offset.
`static SlidingProcessingTimeWindows`	`of(Time size, Time slide)` Deprecated. `of(Duration, Duration)`
`static SlidingProcessingTimeWindows`	`of(Time size, Time slide, Time offset)` Deprecated. Use `of(Duration, Duration, Duration)`
`String`	`toString()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Method Detail
  - assignWindows
```
public Collection<TimeWindow> assignWindows(Object element,
                                            long timestamp,
                                            WindowAssigner.WindowAssignerContext context)
```
    Description copied from class: WindowAssigner
    
    Returns a Collection of windows that should be assigned to the element.
    
    Specified by:
    
    assignWindows in class WindowAssigner<Object,TimeWindow>
    
    Parameters:
    
    element - The element to which windows should be assigned.
    
    timestamp - The timestamp of the element.
    
    context - The WindowAssigner.WindowAssignerContext in which the assigner operates.
  - getSize
```
public long getSize()
```
  - getSlide
```
public long getSlide()
```
  - getDefaultTrigger
```
public Trigger<Object,TimeWindow> getDefaultTrigger(StreamExecutionEnvironment env)
```
    Description copied from class: WindowAssigner
    
    Returns the default trigger associated with this WindowAssigner.
    
    Specified by:
    
    getDefaultTrigger in class WindowAssigner<Object,TimeWindow>
    
    See Also:
    
    FLIP-343: Remove parameter in WindowAssigner#getDefaultTrigger()
  - getDefaultTrigger
```
public Trigger<Object,TimeWindow> getDefaultTrigger()
```
    Description copied from class: WindowAssigner
    
    Returns the default trigger associated with this WindowAssigner.
    1. If you override getDefaultTrigger(), the getDefaultTrigger() will be invoked and the getDefaultTrigger(StreamExecutionEnvironment env) won't be invoked. 2. If you don't override getDefaultTrigger(), the getDefaultTrigger(StreamExecutionEnvironment env) will be invoked in the default implementation of the getDefaultTrigger().
    
    Overrides:
    
    getDefaultTrigger in class WindowAssigner<Object,TimeWindow>
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object
  - of
```
@Deprecated
public static SlidingProcessingTimeWindows of(Time size,
                                                          Time slide)
```
    Deprecated. of(Duration, Duration)
    
    Creates a new SlidingProcessingTimeWindows WindowAssigner that assigns elements to sliding time windows based on the element timestamp.
    
    Parameters:
    
    size - The size of the generated windows.
    
    slide - The slide interval of the generated windows.
    
    Returns:
    
    The time policy.
  - of
```
public static SlidingProcessingTimeWindows of(Duration size,
                                              Duration slide)
```
    Creates a new SlidingProcessingTimeWindows WindowAssigner that assigns elements to sliding time windows based on the element timestamp.
    
    Parameters:
    
    size - The size of the generated windows.
    
    slide - The slide interval of the generated windows.
    
    Returns:
    
    The time policy.
  - of
```
@Deprecated
public static SlidingProcessingTimeWindows of(Time size,
                                                          Time slide,
                                                          Time offset)
```
    Deprecated. Use of(Duration, Duration, Duration)
    
    Creates a new SlidingProcessingTimeWindows WindowAssigner that assigns elements to time windows based on the element timestamp and offset.
    For example, if you want window a stream by hour,but window begins at the 15th minutes of each hour, you can use of(Time.hours(1),Time.minutes(15)),then you will get time windows start at 0:15:00,1:15:00,2:15:00,etc.
    Rather than that,if you are living in somewhere which is not using UTC±00:00 time, such as China which is using UTC+08:00,and you want a time window with size of one day, and window begins at every 00:00:00 of local time,you may use of(Time.days(1),Time.hours(-8)). The parameter of offset is Time.hours(-8)) since UTC+08:00 is 8 hours earlier than UTC time.
    
    Parameters:
    
    size - The size of the generated windows.
    
    slide - The slide interval of the generated windows.
    
    offset - The offset which window start would be shifted by.
    
    Returns:
    
    The time policy.
  - of
```
public static SlidingProcessingTimeWindows of(Duration size,
                                              Duration slide,
                                              Duration offset)
```
    Creates a new SlidingProcessingTimeWindows WindowAssigner that assigns elements to time windows based on the element timestamp and offset.
    For example, if you want window a stream by hour,but window begins at the 15th minutes of each hour, you can use of(Duration.ofHours(1), Duration.ofMinutes(15)), then you will get time windows start at 0:15:00,1:15:00,2:15:00,etc.
    Rather than that,if you are living in somewhere which is not using UTC±00:00 time, such as China which is using UTC+08:00,and you want a time window with size of one day, and window begins at every 00:00:00 of local time,you may use of(Duration.ofDays(1), Duration.ofHours(-8)). The parameter of offset is Duration.ofHours(-8)) since UTC+08:00 is 8 hours earlier than UTC time.
    
    Parameters:
    
    size - The size of the generated windows.
    
    slide - The slide interval of the generated windows.
    
    offset - The offset which window start would be shifted by.
    
    Returns:
    
    The time policy.
  - getWindowSerializer
```
public org.apache.flink.api.common.typeutils.TypeSerializer<TimeWindow> getWindowSerializer(org.apache.flink.api.common.ExecutionConfig executionConfig)
```
    Description copied from class: WindowAssigner
    
    Returns a TypeSerializer for serializing windows that are assigned by this WindowAssigner.
    
    Specified by:
    
    getWindowSerializer in class WindowAssigner<Object,TimeWindow>
  - isEventTime
```
public boolean isEventTime()
```
    Description copied from class: WindowAssigner
    
    Returns true if elements are assigned to windows based on event time, false otherwise.
    
    Specified by:
    
    isEventTime in class WindowAssigner<Object,TimeWindow>

Class SlidingProcessingTimeWindows

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.streaming.api.windowing.assigners.WindowAssigner

Method Summary

Methods inherited from class java.lang.Object

Method Detail

assignWindows

getSize

getSlide

getDefaultTrigger

getDefaultTrigger

toString

of

of

of

of

getWindowSerializer

isEventTime