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.Arrays;
020import java.util.Collections;
021import java.util.List;
022import java.util.stream.Collectors;
023
024import org.apache.camel.cloud.ServiceDefinition;
025import org.apache.camel.cloud.ServiceDiscovery;
026
027public class CombinedServiceDiscovery implements ServiceDiscovery {
028    private final List<ServiceDiscovery> delegates;
029
030    public CombinedServiceDiscovery(List<ServiceDiscovery> delegates) {
031        this.delegates = Collections.unmodifiableList(delegates);
032    }
033
034    public List<ServiceDiscovery> getDelegates() {
035        return this.delegates;
036    }
037
038    @Override
039    public List<ServiceDefinition> getServices(String name) {
040        return delegates.stream()
041            .flatMap(d -> d.getServices(name).stream())
042            .collect(Collectors.toList());
043    }
044
045    // **********************
046    // Helpers
047    // **********************
048
049    public static CombinedServiceDiscovery wrap(ServiceDiscovery... delegates) {
050        return new CombinedServiceDiscovery(Arrays.asList(delegates));
051    }
052}