io.github.sinri.keel.maids.pleiades.Pleiades Maven / Gradle / Ivy

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package io.github.sinri.keel.maids.pleiades;

import io.github.sinri.keel.core.TechnicalPreview;
import io.github.sinri.keel.verticles.KeelVerticleImplWithEventLogger;
import io.vertx.core.Promise;
import io.vertx.core.eventbus.DeliveryOptions;
import io.vertx.core.eventbus.Message;
import io.vertx.core.eventbus.MessageConsumer;
import io.vertx.core.eventbus.MessageProducer;

import static io.github.sinri.keel.facade.KeelInstance.Keel;

/**
 * A queue impl based on EventBus and Messages.
 * Pleiades (戦闘メイド) is the combat maid squad of the Great Tomb of Nazarick [REF: Overlord].
 *
 * @since 3.2.19
 */
@TechnicalPreview(since = "3.2.19")
public abstract class Pleiades extends KeelVerticleImplWithEventLogger {
    private MessageConsumer consumer;

    public static  MessageProducer generateMessageProducer(String address) {
        return generateMessageProducer(address, new DeliveryOptions());
    }

    public static  MessageProducer generateMessageProducer(String address, DeliveryOptions deliveryOptions) {
        return Keel.getVertx().eventBus().sender(address, deliveryOptions);
    }

    abstract public String getAddress();

    abstract protected void handleMessage(Message message);

    @Override
    protected void startAsKeelVerticle(Promise startPromise) {
        // register
        consumer = Keel.getVertx().eventBus().consumer(getAddress(), this::handleMessage);

        // ready!
        startPromise.complete();
    }

    @Override
    protected void stopAsKeelVerticle(Promise stopPromise) {
        if (consumer != null) {
            consumer.unregister()
                    .onSuccess(unused -> stopPromise.complete())
                    .onFailure(stopPromise::fail);
        }
    }
}