Java tutorial
/* * Copyright 2012-2015 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.actuator; import java.util.Collections; import java.util.Date; import java.util.LinkedHashMap; import java.util.Map; import org.hibernate.validator.constraints.NotBlank; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Description; import org.springframework.stereotype.Controller; import org.springframework.validation.annotation.Validated; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.ResponseBody; @Controller @Description("A controller for handling requests for hello messages") public class SampleController { @Autowired private HelloWorldService helloWorldService; @RequestMapping(value = "/", method = RequestMethod.GET) @ResponseBody public Map<String, String> hello() { return Collections.singletonMap("message", this.helloWorldService.getHelloMessage()); } @RequestMapping(value = "/", method = RequestMethod.POST) @ResponseBody public Map<String, Object> olleh(@Validated Message message) { Map<String, Object> model = new LinkedHashMap<String, Object>(); model.put("message", message.getValue()); model.put("title", "Hello Home"); model.put("date", new Date()); return model; } @RequestMapping("/foo") @ResponseBody public String foo() { throw new IllegalArgumentException("Server error"); } protected static class Message { @NotBlank(message = "Message value cannot be empty") private String value; public String getValue() { return this.value; } public void setValue(String value) { this.value = value; } } }