MessageController.java

/*
 * Copyright 2002-2014 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 sample.ui.web;

import java.util.Collection;

import javax.validation.Valid;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
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;

import sample.ui.model.Message;
import sample.ui.repository.MessageRepository;

/**
 * @author Rob Winch
 * @author Arnaldo Piccinelli
 */
@Controller
@RequestMapping("/messages")
public class MessageController {

	@Autowired
	private MessageRepository messageRepository;

	@RequestMapping
	public String list(Model model) {
		Collection<Message> messages = this.messageRepository.findAll();
		model.addAttribute("messages", messages);

		return "messages/messageList";
	}

	@RequestMapping("{id}")
	public ModelAndView view(@PathVariable("id") Message message) {
		return new ModelAndView("messages/messageView", "message", message);
	}

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

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

	@RequestMapping("foo")
	public String foo() {
		throw new RuntimeException("Expected exception in controller");
	}
}