org.cloudfoundry.practical.demo.web.controller.TimeoutController.java Source code

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Here is the source code for org.cloudfoundry.practical.demo.web.controller.TimeoutController.java

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/*
 * Copyright 2010-2012 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 org.cloudfoundry.practical.demo.web.controller;

import java.io.IOException;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

/**
 * MVC Controller to demonstrate timeouts.
 * 
 * @author Phillip Webb
 */
@Controller
public class TimeoutController {

    private Log logger = LogFactory.getLog(getClass());

    private static final int TOTAL_SECONDS_DELAY = 30;

    private static final long ONE_SECOND = 1000;

    @RequestMapping("/timeout/default")
    public ModelAndView timeoutDefault() {
        ModelAndView modelAndView = new ModelAndView("timeout");
        modelAndView.addObject("name", "Default");
        modelAndView.addObject("useshim", false);
        modelAndView.addObject("ajaxcall", "ajaxrequest");
        return modelAndView;
    }

    @RequestMapping("/timeout/drip")
    public ModelAndView timeouDrip() {
        ModelAndView modelAndView = new ModelAndView("timeout");
        modelAndView.addObject("name", "Drip");
        modelAndView.addObject("useshim", false);
        modelAndView.addObject("ajaxcall", "ajaxdrip");
        return modelAndView;
    }

    @RequestMapping("/timeout/shim")
    public ModelAndView timeoutShim() {
        ModelAndView modelAndView = new ModelAndView("timeout");
        modelAndView.addObject("name", "Shim");
        modelAndView.addObject("useshim", true);
        modelAndView.addObject("ajaxcall", "ajaxrequest");
        return modelAndView;
    }

    @RequestMapping("/timeout/ajaxrequest")
    @ResponseBody
    public String ajaxRequest() {
        this.logger.info("Long running task...");
        try {
            for (int i = 1; i <= TOTAL_SECONDS_DELAY; i++) {
                Thread.sleep(ONE_SECOND);
                this.logger.info(" Thinking..." + i);
            }
        } catch (InterruptedException e) {
        }
        return "Hello from the server";
    }

    @RequestMapping("/timeout/ajaxdrip")
    public void ajax(HttpServletResponse response) throws IOException {
        ServletOutputStream outputStream = response.getOutputStream();
        this.logger.info("Long running task...");
        try {
            for (int i = 1; i <= TOTAL_SECONDS_DELAY; i++) {
                Thread.sleep(ONE_SECOND);
                this.logger.info(" Thinking..." + i);
                outputStream.write('.');
                response.flushBuffer();
            }
        } catch (InterruptedException e) {
        }
        outputStream.write("Hello from the server".getBytes());
    }

}