| /* |
| * 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.sling.discovery.base.commons; |
| |
| import java.util.Collection; |
| |
| import org.apache.sling.discovery.ClusterView; |
| import org.apache.sling.discovery.InstanceDescription; |
| |
| /** |
| * Contains some static helper methods around ClusterView |
| */ |
| public class ClusterViewHelper { |
| |
| /** checks whether the cluster view contains a particular sling id **/ |
| public static boolean contains(ClusterView clusterView, String slingId) throws UndefinedClusterViewException { |
| InstanceDescription found = null; |
| for (InstanceDescription i : clusterView.getInstances()) { |
| if (i.getSlingId().equals(slingId)) { |
| if (found!=null) { |
| throw new IllegalStateException("multiple instances with slingId found: "+slingId); |
| } |
| found = i; |
| } |
| } |
| return found!=null; |
| } |
| |
| /** checks whether the cluster contains any of the provided instances **/ |
| public static boolean containsAny(ClusterView clusterView, Collection<InstanceDescription> listInstances) |
| throws UndefinedClusterViewException { |
| for (InstanceDescription i : listInstances) { |
| if (contains(clusterView, i.getSlingId())) { |
| return true; |
| } |
| } |
| return false; |
| } |
| } |