com.swcguild.addressbookwebapp.controller.ErrorController.java Source code

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Here is the source code for com.swcguild.addressbookwebapp.controller.ErrorController.java

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package com.swcguild.addressbookwebapp.controller;

import java.text.MessageFormat;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
class ErrorController {

    // #1 - map this end point to /spring/error
    @RequestMapping("error")
    // #2 - note the use of the Spring Model object rather than a Map
    public String customError(HttpServletRequest request, HttpServletResponse response, Model model) {
        // #3 - retrieve some useful information from the request
        Integer statusCode = (Integer) request.getAttribute("javax.servlet.error.status_code");
        HttpStatus httpStatus = HttpStatus.valueOf(statusCode);
        Throwable throwable = (Throwable) request.getAttribute("javax.servlet.error.exception");
        String exceptionMessage = null;
        exceptionMessage = httpStatus.getReasonPhrase();

        String requestUri = (String) request.getAttribute("javax.servlet.error.request_uri");
        if (requestUri == null) {
            requestUri = "Unknown";
        }

        // #4 - format the message for the View
        String message = MessageFormat.format("{0} returned for {1}: {2}", statusCode, requestUri,
                exceptionMessage);

        // #5 - put the message in the model object
        model.addAttribute("errorMessage", message);
        return "customError";
    }
}