CleanupSubscriber.java

// Copyright 2015 The Project Buendia Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License.  You may obtain a copy
// of the License at: http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software distrib-
// uted under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES
// OR CONDITIONS OF ANY KIND, either express or implied.  See the License for
// specific language governing permissions and limitations under the License.

package org.projectbuendia.client.events;

import de.greenrobot.event.NoSubscriberEvent;

/** A {@link CrudEventBus} subscriber that gets invoked when all subscribers have been unregistered. */
public interface CleanupSubscriber {

    /** Called when an event is posted but no subscribers are registered for that event. */
    void onEvent(NoSubscriberEvent event);

    /** Called when all subscribers on a {@link CrudEventBus} have been unregistered. */
    void onAllUnregistered();
}