| /* |
| * 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.policy.loadbalancing; |
| |
| import org.apache.brooklyn.api.entity.Entity; |
| import org.apache.brooklyn.api.entity.Group; |
| import org.apache.brooklyn.api.entity.ImplementedBy; |
| import org.apache.brooklyn.config.ConfigKey; |
| import org.apache.brooklyn.core.config.BasicConfigKey; |
| import org.apache.brooklyn.entity.group.DynamicGroup; |
| import org.apache.brooklyn.util.core.flags.SetFromFlag; |
| |
| import com.google.common.base.Predicate; |
| import com.google.common.base.Predicates; |
| |
| /** |
| * A group of items that are contained within a given (dynamically changing) set of containers. |
| * |
| * The {@link setContainers(Group)} sets the group of containers. The membership of that group |
| * is dynamically tracked. |
| * |
| * When containers are added/removed, or when an items is added/removed, or when an {@link Moveable} item |
| * is moved then the membership of this group of items is automatically updated accordingly. |
| * |
| * For example: in Monterey, this could be used to track the actors that are within a given cluster of venues. |
| */ |
| @ImplementedBy(ItemsInContainersGroupImpl.class) |
| public interface ItemsInContainersGroup extends DynamicGroup { |
| |
| @SetFromFlag("itemFilter") |
| public static final ConfigKey<Predicate<? super Entity>> ITEM_FILTER = new BasicConfigKey( |
| Predicate.class, "itemsInContainerGroup.itemFilter", "Filter for which items within the containers will automatically be in group", Predicates.alwaysTrue()); |
| |
| public void setContainers(Group containerGroup); |
| } |