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Using Camel with Spring Boot

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/*
 * 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.camel.spring.boot;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Map;
import java.util.Set;
import org.apache.camel.CamelContext;
import org.apache.camel.main.DefaultRoutesCollector;
import org.apache.camel.support.DefaultRegistry;
import org.springframework.context.ApplicationContext;

public class CamelSpringBootRoutesCollector extends DefaultRoutesCollector {

    private final ApplicationContext applicationContext;
    private final boolean includeNonSingletons;

    public CamelSpringBootRoutesCollector(ApplicationContext applicationContext, boolean includeNonSingletons) {
        this.applicationContext = applicationContext;
        this.includeNonSingletons = includeNonSingletons;
    }

    @Override
    protected  Collection findByType(CamelContext camelContext, Class type) {
        // only spring-boot knows about non-singleton beans
        Map beans = applicationContext.getBeansOfType(type, includeNonSingletons, true);
        Collection answer = new ArrayList<>(beans.values());
        // there may be additional routes from fallback registry
        DefaultRegistry dr = camelContext.getRegistry(DefaultRegistry.class);
        if (dr != null) {
            Set extra = dr.getFallbackRegistry().findByType(type);
            answer.addAll(extra);
        }
        return answer;
    }
}