/*
* 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.core.entity.trait;
import org.apache.brooklyn.api.entity.Entity;
import org.apache.brooklyn.api.sensor.AttributeSensor;
import org.apache.brooklyn.core.sensor.BasicNotificationSensor;
import org.apache.brooklyn.core.sensor.Sensors;
/**
* A collection of entities that can change.
*/
public interface Changeable {
AttributeSensor<Integer> GROUP_SIZE = Sensors.newIntegerSensor("group.members.count", "Number of members");
BasicNotificationSensor<Entity> MEMBER_ADDED = new BasicNotificationSensor<Entity>(Entity.class, "group.members.added", "Entity added to group members");
BasicNotificationSensor<Entity> MEMBER_REMOVED = new BasicNotificationSensor<Entity>(Entity.class, "group.members.removed", "Entity removed from group members");
}