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.cloud;
018
019import java.util.Optional;
020import java.util.Set;
021
022import org.apache.camel.CamelContext;
023import org.apache.camel.cloud.ServiceRegistry;
024import org.apache.camel.util.ObjectHelper;
025
026public final class ServiceRegistryHelper {
027    private ServiceRegistryHelper() {
028    }
029
030    public static Optional<ServiceRegistry> lookupService(CamelContext context) {
031        return lookupService(context, ServiceRegistrySelectors.DEFAULT_SELECTOR);
032    }
033
034    public static Optional<ServiceRegistry> lookupService(CamelContext context, ServiceRegistry.Selector selector) {
035        ObjectHelper.notNull(context, "Camel Context");
036        ObjectHelper.notNull(selector, "ServiceRegistry selector");
037
038        Set<ServiceRegistry> services = context.hasServices(ServiceRegistry.class);
039
040        if (ObjectHelper.isNotEmpty(services)) {
041            return selector.select(services);
042        }
043
044        return Optional.empty();
045    }
046
047    public static ServiceRegistry mandatoryLookupService(CamelContext context) {
048        return lookupService(context).orElseThrow(() -> new IllegalStateException("ServiceRegistry service not found"));
049    }
050
051    public static ServiceRegistry mandatoryLookupService(CamelContext context, ServiceRegistry.Selector selector) {
052        return lookupService(context, selector).orElseThrow(() -> new IllegalStateException("ServiceRegistry service not found"));
053    }
054}