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PATTERN: EVENT-DRIVEN COMMUNICATION

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Pragya Keshap answered on February 15, 2023 Popularity 1/10 Helpfulness 1/10

answer PATTERN: EVENT-DRIVEN COMMUNICATION

PATTERN: EVENT-DRIVEN COMMUNICATION

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we see an event being broadcast from

the Customer microservice, informing

interested parties that a new customer

has registered with the system.

• Two of the downstream

microservices, Loyalty and Notifications

• The Loyalty microservice reacts to

receiving the event by setting up an

account for the new customer so that they

can start earning points

• The Notifications microservice sends an

email to the newly registered customer

welcoming them to the wondrous delights

of MusicCorp

@Component
public class AuditListener {
	
	@Async
	@EventListener
	public void handler(AuditEvent event) {
		
		System.out.println("Auditing the event "+event.getName());
	}
}
Main class:

package com.example.spring.event;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableAsync;
@EnableAsync
@SpringBootApplication
public class EventdrivenApplication {
	public static void main(String[] args) {
		SpringApplication.run(EventdrivenApplication.class, args);
	}
}
That’s it!


Here is the link to the entire code:

https://github.com/vijaysrj/eventdriven

Handling multiple events:
You can also use the same event listener to listen for multiple events.

To do this , just pass the event classes as parameter to the @EventListener annotation:

@EventListener(classes = UserEvent.class,OrderEvent.class)
	public void handler() {
		
		System.out.println("Auditing the event "+event.getName());
	}

https://microservices.io/patterns/data/event-driven-architecture.html

Popularity 1/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: communication event-driven java

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Contributed on Feb 15 2023

Pragya Keshap

0 Answers Avg Quality 2/10

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