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

Class Join

java.lang.Object

org.apache.flink.streaming.examples.dsv2.join.Join

public class Join
extends Object

Example illustrating a join between two data streams. The example works on two input streams with pairs (name, grade) and (name, salary) respectively. It joins the streams based on "name".

The example uses a built-in sample data as inputs, which can be found in the resources directory.

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 Join 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	Join.GradeAndSalaryPojo	POJO class for grade and salary.
static class	Join.GradePojo	POJO class for grades.
static class	Join.SalaryPojo	POJO class for salaries.

Constructor Summary

Constructors

Constructor	Description
Join()

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 Details

Join

public Join()

Method Details

main

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

Throws:

Exception