com.ecsteam.subservices.SubserviceDiscoveryManager.java Source code

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Here is the source code for com.ecsteam.subservices.SubserviceDiscoveryManager.java

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/*
 * Copyright 2015 ECS Team, Inc.
 *
 * Licensed 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 com.ecsteam.subservices;

import static org.springframework.hateoas.mvc.ControllerLinkBuilder.linkTo;

import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.hateoas.Link;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Controller;

@Component
public class SubserviceDiscoveryManager {

    @Autowired
    private ApplicationContext applicationContext;

    public Iterable<Link> getLinks() {
        Map<String, Object> beans = applicationContext.getBeansWithAnnotation(Controller.class);

        List<Link> links = new LinkedList<Link>();

        for (Map.Entry<String, Object> entry : beans.entrySet()) {
            String beanName = entry.getKey();
            Object bean = entry.getValue();

            Class<?> beanClass = bean.getClass();

            if (AnnotationUtils.findAnnotation(beanClass, DiscoverableSubservice.class) != null) {
                links.add(linkTo(bean.getClass()).withRel(beanName));
            }
        }

        return links;
    }
}