001/** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.camel.impl.cluster; 018 019import java.util.Optional; 020import java.util.Set; 021 022import org.apache.camel.CamelContext; 023import org.apache.camel.cluster.CamelClusterService; 024import org.apache.camel.util.ObjectHelper; 025 026public final class ClusterServiceHelper { 027 private ClusterServiceHelper() { 028 } 029 030 public static Optional<CamelClusterService> lookupService(CamelContext context) { 031 return lookupService(context, ClusterServiceSelectors.DEFAULT_SELECTOR); 032 } 033 034 public static Optional<CamelClusterService> lookupService(CamelContext context, CamelClusterService.Selector selector) { 035 ObjectHelper.notNull(context, "Camel Context"); 036 ObjectHelper.notNull(selector, "ClusterService selector"); 037 038 Set<CamelClusterService> services = context.hasServices(CamelClusterService.class); 039 040 if (ObjectHelper.isNotEmpty(services)) { 041 return selector.select(services); 042 } 043 044 return Optional.empty(); 045 } 046 047 public static CamelClusterService mandatoryLookupService(CamelContext context) { 048 return lookupService(context).orElseThrow(() -> new IllegalStateException("CamelCluster service not found")); 049 } 050 051 public static CamelClusterService mandatoryLookupService(CamelContext context, CamelClusterService.Selector selector) { 052 return lookupService(context, selector).orElseThrow(() -> new IllegalStateException("CamelCluster service not found")); 053 } 054}