| /* |
| * 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.entity.proxy; |
| |
| import java.util.Map; |
| |
| import org.apache.brooklyn.api.entity.Entity; |
| import org.apache.brooklyn.entity.group.DynamicClusterImpl; |
| |
| /** |
| * A cluster of load balancers, where configuring the cluster (through the LoadBalancer interface) |
| * will configure all load balancers in the cluster. |
| * |
| * Config keys (such as LoadBalancer.serverPool and LoadBalancer.urlMappings) are automatically |
| * inherited by the children of the load balancer cluster. It is through that mechanism that |
| * configuration changes on the cluster will be applied to all child load balancers (i.e. by |
| * them all sharing the same serverPool and urlMappings etc). |
| * |
| * @author aled |
| */ |
| public class LoadBalancerClusterImpl extends DynamicClusterImpl implements LoadBalancerCluster { |
| |
| // TODO I suspect there are races with reconfiguring the load-balancers while |
| // the cluster is growing: there is no synchronization around the calls to reload |
| // and the resize, so presumably there's a race where a newly added load-balancer |
| // could miss the most recent reload call? |
| |
| public LoadBalancerClusterImpl() { |
| super(); |
| } |
| |
| /* NOTE The following methods come from {@link LoadBalancer} but are probably safe to ignore */ |
| |
| @Override |
| public void reload() { |
| for (Entity member : getMembers()) { |
| if (member instanceof LoadBalancer) { |
| ((LoadBalancer)member).reload(); |
| } |
| } |
| } |
| |
| @Override |
| public void update() { |
| for (Entity member : getMembers()) { |
| if (member instanceof LoadBalancer) { |
| ((LoadBalancer)member).update(); |
| } |
| } |
| } |
| |
| @Override |
| public void bind(Map<?,?> flags) { |
| for (Entity member : getMembers()) { |
| if (member instanceof LoadBalancer) { |
| ((LoadBalancer)member).bind(flags); |
| } |
| } |
| } |
| } |