com.terheyden.event.ModifiableEventRouterImpl Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of event-router Show documentation

Simple, fast, flexible event router / event bus for Java

The newest version!

package com.terheyden.event;

import java.util.Collection;
import java.util.UUID;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.stream.Collectors;

/**
 * EventRouter class.
 * Not static, so you can have multiple event routers.
 * You can always make it static if they want.
 */
public class ModifiableEventRouterImpl extends BaseEventRouter implements ModifiableEventRouter {

    ModifiableEventRouterImpl(SubscriberExceptionHandler eventHandler, ThreadPoolExecutor threadPoolExecutor) {
        super(threadPoolExecutor, new ModifiableEventSendStrategy<>(eventHandler));
    }

    @Override
    public UUID subscribe(CheckedFunction eventHandler) {
        ModifiableEventSubscription subscription = new ModifiableEventSubscription<>(eventHandler);
        getSubscriberManager().subscribe(subscription);
        return subscription.getSubscriptionId();
    }

    @Override
    public UUID subscribeReadOnly(CheckedConsumer eventHandler) {

        ModifiableEventSubscription subscription = new ModifiableEventSubscription<>(eventObj -> {
            eventHandler.accept(eventObj);
            return eventObj;
        });

        getSubscriberManager().subscribe(subscription);
        return subscription.getSubscriptionId();
    }

    @Override
    public void unsubscribe(UUID subscriptionId) {
        getSubscriberManager().unsubscribe(subscriptionId);
    }

    @Override
    public void publish(T eventObj) {
        publishInternal(new EventRequest<>(eventObj));
    }

    @Override
    public ThreadPoolExecutor getThreadPool() {
        return super.getThreadPool();
    }

    @Override
    public Collection getSubscriptions() {
        return getSubscribers()
            .stream()
            .map(EventSubscription::getSubscriptionId)
            .collect(Collectors.toList());
    }
}