core/api/src/main/java/org/onosproject/event/ListenerService.java

/*
 * Copyright 2015-present Open Networking Foundation
 *
 * 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
 * distributed 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 the specific language governing permissions and
 * limitations under the License.
 */
package org.onosproject.event;

/**
 * Abstraction of a service capable of asynchronously notifying listeners.
 */
public interface ListenerService<E extends Event, L extends EventListener<E>> {

    /**
     * Adds the specified listener.
     *
     * @param listener listener to be added
     */
    void addListener(L listener);

    /**
     * Removes the specified listener.
     *
     * @param listener listener to be removed
     */
    void removeListener(L listener);


}