Package org.apache.flink.streaming.examples.dsv2.windowing

Class CountProductSalesWindowing

java.lang.Object

org.apache.flink.streaming.examples.dsv2.windowing.CountProductSalesWindowing

public class CountProductSalesWindowing
extends Object

Example illustrating how to use Window to count the sales of each product in each hour by DataStream API V2.

The input is a list of orders, each order is a consist of productId and orderTimestamp.

Usage:

• --output <path>The output directory where the Job will write the results. If no output path is provided, the Job will print the results to stdout .

This example shows how to:

• Usage of Window extension in DataStream API V2

Please note that if you intend to run this example in an IDE, you must first add the following VM options: "--add-opens=java.base/java.util=ALL-UNNAMED". This is necessary because the module system in JDK 17+ restricts some reflection operations.

Please note that the DataStream API V2 is a new set of APIs, to gradually replace the original DataStream API. It is currently in the experimental stage and is not fully available for production.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	CountProductSalesWindowing.CountSalesQuantity	Count sales quantity per product.
static class	CountProductSalesWindowing.Order	Pojo class for order.
static class	CountProductSalesWindowing.ProductSales	The CountProductSalesWindowing.ProductSales class represents the count of product sales within one hour.

Constructor Summary

Constructors

Constructor	Description
CountProductSalesWindowing()

Method Summary

Modifier and Type	Method	Description
static void	main(String[] args)

Methods inherited from class java.lang.Object

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

Constructor Detail

CountProductSalesWindowing

public CountProductSalesWindowing()

Method Detail

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception