api/src/main/java/org/apache/brooklyn/api/sensor/SensorEventListener.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.brooklyn.api.sensor;

import org.apache.brooklyn.api.entity.Entity;

/**
 * A listener for {@link SensorEvent}s on an {@link Entity}.
 */
public interface SensorEventListener<T> {
    
    public static final SensorEventListener<Object> NOOP = new SensorEventListener<Object>() {
        @Override public void onEvent(SensorEvent<Object> event) {
        }
    };
    
    /**
     * The {@link SensorEvent} handler method.
     */
    void onEvent(SensorEvent<T> event);
}