MessageController.java

/*
 * Copyright 2012 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 sample.mvc;

import javax.validation.Valid;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import sample.data.Message;
import sample.data.MessageRepository;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

/**
 *
 * @author Rob Winch
 *
 */
@Controller
@RequestMapping("/messages/")
public class MessageController {
	private MessageRepository messageRepository;

	@Autowired
	public MessageController(MessageRepository messageRepository) {
		this.messageRepository = messageRepository;
	}

	@RequestMapping
	public ModelAndView list() {
		Iterable<Message> messages = messageRepository.findAll();
		return new ModelAndView("messages/list", "messages", messages);
	}

	@RequestMapping("{id}")
	public ModelAndView view(@PathVariable("id")
	Long id) {
		Message message = messageRepository.findOne(id);
		return new ModelAndView("messages/view", "message", message);
	}

	@RequestMapping(value = "form", method = RequestMethod.GET)
	public String createForm(@ModelAttribute
	Message message) {
		return "messages/form";
	}

	@RequestMapping(method = RequestMethod.POST)
	public ModelAndView create(@Valid
	Message message, BindingResult result, RedirectAttributes redirect) {
		if (result.hasErrors()) {
			return new ModelAndView("messages/form");
		}
		message = messageRepository.save(message);
		redirect.addFlashAttribute("globalMessage", "Successfully created a new message");
		return new ModelAndView("redirect:/messages/{message.id}", "message.id", message.getId());
	}
}