no.ntnu.okse.web.controller.TopicController.java Source code

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Here is the source code for no.ntnu.okse.web.controller.TopicController.java

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/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 Norwegian Defence Research Establishment / NTNU
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package no.ntnu.okse.web.controller;

import no.ntnu.okse.core.subscription.SubscriptionService;
import no.ntnu.okse.core.topic.Topic;
import no.ntnu.okse.core.topic.TopicService;
import org.apache.log4j.Logger;
import org.springframework.web.bind.annotation.*;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;

/**
 * Created by Hkon degrd Lvdal (hakloev) on 13/03/15.
 * <p>
 * okse is licenced under the MIT licence.
 */
@RestController
@RequestMapping("/api/topic")
public class TopicController {

    private static final String GET_ALL_TOPICS = "/get/all";
    private static final String DELETE_ALL_TOPICS = "/delete/all";
    private static final String DELETE_SINGLE_TOPIC = "/delete/single";

    private static Logger log = Logger.getLogger(TopicController.class.getName());

    /**
     * This method returns all topics registered in the TopicService
     *
     * @return A JSON serialization of all registered topics
     */
    @RequestMapping(method = RequestMethod.GET, value = GET_ALL_TOPICS)
    public @ResponseBody List<HashMap<String, Object>> getAlltopics() {
        TopicService ts = TopicService.getInstance();
        SubscriptionService ss = SubscriptionService.getInstance();
        HashSet<Topic> allTopics = ts.getAllTopics();

        List<HashMap<String, Object>> results = new ArrayList<>();

        allTopics.stream().forEach(t -> {
            int subscribers = ss.getAllSubscribersForTopic(t.getFullTopicString()).size();
            HashMap<String, Object> topicInfo = new HashMap<String, Object>() {
                {
                    put("subscribers", subscribers);
                    put("topic", t);
                }
            };
            results.add(topicInfo);
        });

        results.sort((t1, t2) -> ((Topic) t1.get("topic")).getFullTopicString()
                .compareTo(((Topic) t2.get("topic")).getFullTopicString()));

        return results;
    }

    /**
     * This method deletes all topics registered in the TopicService
     *
     * @return A JSON serialized string
     */
    @RequestMapping(method = RequestMethod.DELETE, value = DELETE_ALL_TOPICS)
    public @ResponseBody String deleteAllTopics() {
        log.info("Deleting all topics");
        TopicService ts = TopicService.getInstance();
        HashSet<Topic> allRootTopics = ts.getAllRootTopics();
        allRootTopics.forEach(t -> ts.deleteTopic(t.getFullTopicString()));

        return "{ \"messages\" :\"The topic were successfully deleted\" }";
    }

    /**
     * This method returns a single topic registered in the TopicService, represented by a string id
     *
     * @param id The topic id to search for
     * @return A JSON serialized Topic
     */
    @RequestMapping(method = RequestMethod.DELETE, value = DELETE_SINGLE_TOPIC)
    public @ResponseBody HashMap<String, Object> deleteSingleTopic(@RequestParam(value = "topicID") String id) {
        log.info("Deleting Topic with ID: " + id);
        TopicService ts = TopicService.getInstance();
        Topic t = ts.getTopicByID(id.trim());
        ts.deleteTopic(t.getFullTopicString());
        HashMap<String, Object> result = new HashMap<String, Object>() {
            {
                put("topicID", t.getTopicID());
                /*put("children", t.getChildren());*/
            }
        };

        return result;
    }

}