import org.springframework.context.ApplicationEvent;

​

public class EmailRegistrationEvent extends ApplicationEvent {

    private final String email;

​

    public EmailRegistrationEvent(Object source, String email) {

        super(source);

        this.email = email;

    }

​

    public String getEmail() {

        return email;

    }

}

​

​

import org.springframework.context.ApplicationEvent;

​

public class PromotionEvent extends ApplicationEvent {

    private final String promotionMessage;

​

    public PromotionEvent(Object source, String promotionMessage) {

        super(source);

        this.promotionMessage = promotionMessage;

    }

​

    public String getPromotionMessage() {

        return promotionMessage;

    }

}

​

​

import org.springframework.context.ApplicationEventPublisher;

import org.springframework.stereotype.Component;

​

@Component

public class EventPublisher {

    private final ApplicationEventPublisher eventPublisher;

​

    public EventPublisher(ApplicationEventPublisher eventPublisher) {

        this.eventPublisher = eventPublisher;

    }

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    public void publishEmailRegistrationEvent(String email) {

        EmailRegistrationEvent event = new EmailRegistrationEvent(this, email);

        eventPublisher.publishEvent(event);

    }

​

    public void publishPromotionEvent(String promotionMessage) {

        PromotionEvent event = new PromotionEvent(this, promotionMessage);

        eventPublisher.publishEvent(event);

    }

}

​

​

​

import org.springframework.context.ApplicationListener;

import org.springframework.stereotype.Component;

​

@Component

public class EmailRegistrationEventListener implements ApplicationListener<EmailRegistrationEvent> {

    @Override

    public void onApplicationEvent(EmailRegistrationEvent event) {

        String email = event.getEmail();

        System.out.println("Email Registration Event Received: " + email);

        // Add your email registration handling logic here (e.g., send a confirmation email)

    }

}

​

​

​

import org.springframework.context.ApplicationListener;

import org.springframework.stereotype.Component;

​

@Component

public class PromotionEventListener implements ApplicationListener<PromotionEvent> {

    @Override

    public void onApplicationEvent(PromotionEvent event) {

        String promotionMessage = event.getPromotionMessage();

        System.out.println("Promotion Event Received: " + promotionMessage);

        // Add your promotion handling logic here (e.g., send promotion notifications)

    }

}

​

​

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.context.ConfigurableApplicationContext;

​

@SpringBootApplication

public class GenericEventApplication {

    public static void main(String[] args) {

        ConfigurableApplicationContext context = SpringApplication.run(GenericEventApplication.class, args);

​

        // Simulate email registration event

        EventPublisher eventPublisher = context.getBean(EventPublisher.class);

        eventPublisher.publishEmailRegistrationEvent("user@example.com");

​

        // Simulate promotion event

        eventPublisher.publishPromotionEvent("50% off on selected items!");

​

        // Close the application context

        context.close();

    }

}

​