org.lecture.controller.UserController.java Source code

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Here is the source code for org.lecture.controller.UserController.java

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package org.lecture.controller;

/*
* Copyright (c) 2015 .
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
*/

import nats.client.Nats;
import org.lecture.model.User;
import org.lecture.resource.UserResource;
import org.lecture.repository.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.web.PageableDefault;
import org.springframework.data.web.PagedResourcesAssembler;
import org.springframework.hateoas.ExposesResourceFor;
import org.springframework.hateoas.PagedResources;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

/**
 * A controller for User Routes.
 * @author Rene Richter
 */
@RestController
@RequestMapping("/users")
@ExposesResourceFor(User.class)
public class UserController extends BaseController {

    @Autowired
    UserRepository userRepository;

    @Autowired
    private Nats nats;

    /**
     * Returns a list of users.
     *
     * @param pageable  The number of items, gotten through the url
     * @return a Resource representing the page.
     */
    @RequestMapping(method = RequestMethod.GET)
    public Page<User> getAll(@PageableDefault(size = 20, page = 0) Pageable pageable) {

        return this.userRepository.findAll(pageable);
    }

    /**
     * Creates a new User
     * @param entity the user from the post-request. This user is deserialized by
     *              jackson.
     * @return A respoonse containing a link to the new resource.
     */
    @RequestMapping(method = RequestMethod.POST, consumes = "application/json;charset=UTF-8")
    public ResponseEntity<?> create(@RequestBody User entity) {
        User user = this.userRepository.findByUsername(entity.getUsername());
        if (user == null) {
            this.userRepository.save(entity);
            nats.publish("authentication-service.user-created", entity.getId());
            return ResponseEntity.noContent().build();
        }
        return ResponseEntity.status(HttpStatus.CONFLICT).build();
    }

    /**
     * Returns one User.
     *
     * @param id the id of the  user to return.
     * @return a response.
     */
    @RequestMapping(value = "/{id}", method = RequestMethod.GET)
    public UserResource getOne(@PathVariable String id) {
        return new UserResource(userRepository.findOne(id));
    }

    @RequestMapping(value = "/{id}", method = RequestMethod.DELETE)
    public ResponseEntity<?> delete(@PathVariable String id) {
        userRepository.delete(id);
        nats.publish("authentication-service.delete-user", id);
        return ResponseEntity.noContent().build();
    }

    @RequestMapping(value = "/{id}", method = RequestMethod.PUT)
    public ResponseEntity<?> update(@PathVariable String id, @RequestBody User newValues) {
        newValues.setId(id);
        userRepository.save(newValues);
        return ResponseEntity.noContent().build();
    }

}