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/*
* ============LICENSE_START=======================================================
* ONAP : DataLake
* ================================================================================
* Copyright 2019 China Mobile
*=================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.datalake.feeder.controller;
import java.io.IOException;
import java.util.List;
import java.util.Set;
import javax.servlet.http.HttpServletResponse;
import org.onap.datalake.feeder.domain.Db;
import org.onap.datalake.feeder.domain.Topic;
import org.onap.datalake.feeder.repository.TopicRepository;
import org.onap.datalake.feeder.service.DbService;
import org.onap.datalake.feeder.service.DmaapService;
import org.onap.datalake.feeder.service.TopicService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
/**
* This controller manages topic settings.
*
* Topic "_DL_DEFAULT_" acts as the default. For example, if a topic's enabled=null, _DL_DEFAULT_.enabled is used for that topic.
* All the settings are saved in database.
* topic "_DL_DEFAULT_" is populated at setup by a DB script.
*
* @author Guobiao Mo
*
*/
@RestController
@RequestMapping(value = "/topics", produces = { MediaType.APPLICATION_JSON_VALUE })//, consumes= {MediaType.APPLICATION_JSON_UTF8_VALUE})
public class TopicController {
private final Logger log = LoggerFactory.getLogger(this.getClass());
@Autowired
private DmaapService dmaapService;
@Autowired
private TopicRepository topicRepository;
@Autowired
private TopicService topicService;
@Autowired
private DbService dbService;
//list all topics in DMaaP
@GetMapping("/dmaap/")
@ResponseBody
public List<String> listDmaapTopics() throws IOException {
return dmaapService.getTopics();
}
//list all topics
@GetMapping("/")
@ResponseBody
public Iterable<Topic> list() throws IOException {
Iterable<Topic> ret = topicRepository.findAll();
return ret;
}
//Read a topic
@GetMapping("/{topicname}")
@ResponseBody
public Topic getTopic(@PathVariable("topicname") String topicName) throws IOException {
Topic topic = topicService.getTopic(topicName);
return topic;
}
//Read DBs in a topic
@GetMapping("/{topicname}/dbs")
@ResponseBody
public Set<Db> getTopicDbs(@PathVariable("topicname") String topicName) throws IOException {
Topic topic = topicService.getTopic(topicName);
Set<Db> dbs = topic.getDbs();
return dbs;
}
//Update Topic
//This is not a partial update: old topic is wiped out, and new topic is created base on the input json.
//One exception is that old DBs are kept
@PutMapping("/")
@ResponseBody
public Topic updateTopic(@RequestBody Topic topic, BindingResult result, HttpServletResponse response) throws IOException {
if (result.hasErrors()) {
sendError(response, 400, "Error parsing Topic: "+result.toString());
return null;
}
Topic oldTopic = getTopic(topic.getName());
if (oldTopic == null) {
sendError(response, 404, "Topic not found "+topic.getName());
return null;
} else {
if(!topic.isDefault()) {
Topic defaultTopic = topicService.getDefaultTopic();
topic.setDefaultTopic(defaultTopic);
}
topic.setDbs(oldTopic.getDbs());
topicRepository.save(topic);
return topic;
}
}
//create a new Topic
@PostMapping("/")
@ResponseBody
public Topic createTopic(@RequestBody Topic topic, BindingResult result, HttpServletResponse response) throws IOException {
if (result.hasErrors()) {
sendError(response, 400, "Error parsing Topic: "+result.toString());
return null;
}
Topic oldTopic = getTopic(topic.getName());
if (oldTopic != null) {
sendError(response, 400, "Topic already exists "+topic.getName());
return null;
} else {
if(!topic.isDefault()) {
Topic defaultTopic = topicService.getDefaultTopic();
topic.setDefaultTopic(defaultTopic);
}
topicRepository.save(topic);
return topic;
}
}
//delete a db from the topic
@DeleteMapping("/{topicname}/db/{dbname}")
@ResponseBody
public Set<Db> deleteDb(@PathVariable("topicname") String topicName, @PathVariable("dbname") String dbName, HttpServletResponse response) throws IOException {
Topic topic = topicService.getTopic(topicName);
Set<Db> dbs = topic.getDbs();
dbs.remove(new Db(dbName));
topicRepository.save(topic);
return topic.getDbs();
}
//add a db to the topic
@PutMapping("/{topicname}/db/{dbname}")
@ResponseBody
public Set<Db> addDb(@PathVariable("topicname") String topicName, @PathVariable("dbname") String dbName, HttpServletResponse response) throws IOException {
Topic topic = topicService.getTopic(topicName);
Set<Db> dbs = topic.getDbs();
Db db = dbService.getDb(dbName);
dbs.add(db);
topicRepository.save(topic);
return topic.getDbs();
}
private void sendError(HttpServletResponse response, int sc, String msg) throws IOException {
log.info(msg);
response.sendError(sc, msg);
}
}
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