com.sambrannen.samples.events.web.RestEventController.java Source code

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Here is the source code for com.sambrannen.samples.events.web.RestEventController.java

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/*
 * Copyright 2010-2014 the original author or authors.
 *
 * 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.sambrannen.samples.events.web;

import static org.springframework.web.bind.annotation.RequestMethod.*;

import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.dao.DataIntegrityViolationException;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.ExceptionHandler;
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.ResponseStatus;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.util.UriTemplate;

import com.sambrannen.samples.events.domain.Event;
import com.sambrannen.samples.events.repository.EventRepository;

/**
 * RESTful controller for {@link Event events}.
 *
 * @author Sam Brannen
 * @since 1.0
 */
@RestController
@RequestMapping("/events")
public class RestEventController {

    private final EventRepository repository;

    @Autowired
    public RestEventController(EventRepository eventRepository) {
        this.repository = eventRepository;
    }

    @RequestMapping(method = GET)
    public List<Event> retrieveAllEvents() {
        return repository.findAll();
    }

    @RequestMapping(method = POST)
    @ResponseStatus(HttpStatus.CREATED)
    public void createEvent(@RequestBody Event postedEvent, HttpServletRequest request,
            HttpServletResponse response) {
        Event savedEvent = repository.save(postedEvent);
        String newLocation = buildNewLocation(request, savedEvent.getId());
        response.setHeader("Location", newLocation);
    }

    @RequestMapping(value = "/{id}", method = GET)
    public Event retrieveEvent(@PathVariable Long id) {
        return repository.findOne(id);
    }

    @RequestMapping(value = "/{id}", method = DELETE)
    @ResponseStatus(HttpStatus.NO_CONTENT)
    public void deleteEvent(@PathVariable Long id) {
        repository.delete(id);
    }

    @ResponseStatus(HttpStatus.CONFLICT)
    @ExceptionHandler(DataIntegrityViolationException.class)
    public void handleDatabaseConstraintViolation() {
        /* no-op */
    }

    private String buildNewLocation(HttpServletRequest request, Long id) {
        String url = request.getRequestURL().append("/{id}").toString();
        UriTemplate uriTemplate = new UriTemplate(url);
        return uriTemplate.expand(id).toASCIIString();
    }

}