Package org.apache.pulsar.functions.windowing

Class WindowImpl<T>

java.lang.Object

org.apache.pulsar.functions.windowing.WindowImpl<T>

All Implemented Interfaces:

Window<T>

public class WindowImpl<T>
extends Object
implements Window<T>

Holds the expired, new and current events in a window.

Constructor Summary

Constructors

Constructor	Description
WindowImpl(List<T> tuples, List<T> newTuples, List<T> expiredTuples, Long startTimestamp, Long endTimestamp)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
List<T>	get()	Gets the list of events in the window.
Long	getEndTimestamp()	If processing based on event time, returns the window end time based on watermark otherwise returns the window end time based on processing time.
List<T>	getExpired()	Get the list of events expired from the window since the last time the window was generated.
List<T>	getNew()	Get the list of newly added events in the window since the last time the window was generated.
Long	getStartTimestamp()	Returns the window start timestamp.
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

WindowImpl

public WindowImpl(List<T> tuples,
 List<T> newTuples,
 List<T> expiredTuples,
 Long startTimestamp,
 Long endTimestamp)

Method Details

get

public List<T> get()

Description copied from interface: Window

Gets the list of events in the window.

Note: If the number of tuples in windows is huge, invoking get would load all the tuples into memory and may throw an OOM exception. Use windowing with persistence

Specified by:

get in interface Window<T>

Returns:

the list of events in the window.

getNew

public List<T> getNew()

Description copied from interface: Window

Get the list of newly added events in the window since the last time the window was generated.

Specified by:

getNew in interface Window<T>

Returns:

the list of newly added events in the window.

getExpired

public List<T> getExpired()

Description copied from interface: Window

Get the list of events expired from the window since the last time the window was generated.

Specified by:

getExpired in interface Window<T>

Returns:

the list of events expired from the window.

getStartTimestamp

public Long getStartTimestamp()

Description copied from interface: Window

Returns the window start timestamp. Will return null if the window length is not based on time duration.

Specified by:

getStartTimestamp in interface Window<T>

Returns:

the window start timestamp or null if the window length is not time based

getEndTimestamp

public Long getEndTimestamp()

Description copied from interface: Window

If processing based on event time, returns the window end time based on watermark otherwise returns the window end time based on processing time.

Specified by:

getEndTimestamp in interface Window<T>

Returns:

the window end timestamp

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object