Skip to main content

Google App Engine Hello world

By
In this article,I am going to show how to deploy J2EE Google Web Application in Google App Engine

 Step 1: Install Google App Engine in Eclipse Market Place.

Step 2: Create Google Web Application in Eclipse and Create  Google Web Application Name from Google App Engine Dashboard Page https://appengine.google.com/

Screen Shots


Project Folder Explorer Screen Shot
 


App Engine Xml Configuration
<?xml version="1.0" encoding="utf-8"?>
<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
  <application>jspexample123</application>
  <version>1</version>

  <!--
    Allows App Engine to send multiple requests to one instance in parallel:
  -->
  <threadsafe>true</threadsafe>

  <!-- Configure java.util.logging -->
  <system-properties>
    <property name="java.util.logging.config.file" value="WEB-INF/logging.properties"/>
  </system-properties>

  <!--
    HTTP Sessions are disabled by default. To enable HTTP sessions specify:

      <sessions-enabled>true</sessions-enabled>

    It's possible to reduce request latency by configuring your application to
    asynchronously write HTTP session data to the datastore:

      <async-session-persistence enabled="true" />

    With this feature enabled, there is a very small chance your app will see
    stale session data. For details, see
    http://code.google.com/appengine/docs/java/config/appconfig.html#Enabling_Sessions
  -->

</appengine-web-app>

Here,

<application>jspexample123</application>
  Web application has to be given the same name that I have given in the Google App Engine page 

In Web.xml
<?xml version="1.0" encoding="utf-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
<servlet>
<servlet-name>JspExampleinGAE</servlet-name>
<servlet-class>com.kumaran.jsp.JspExampleinGAEServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>JspExampleinGAE</servlet-name>
<url-pattern>/jspexampleingae</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
</web-app>

Servlet Coding

package com.kumaran.jsp;

import java.io.IOException;
import javax.servlet.http.*;

@SuppressWarnings("serial")
public class JspExampleinGAEServlet extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws IOException {
resp.setContentType("text/html");
resp.getWriter().println("<h1>Hello, world<h1>");
}
}


Html Page

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<!-- The HTML 4.01 Transitional DOCTYPE declaration-->
<!-- above set at the top of the file will set     -->
<!-- the browser's rendering engine into           -->
<!-- "Quirks Mode". Replacing this declaration     -->
<!-- with a "Standards Mode" doctype is supported, -->
<!-- but may lead to some differences in layout.   -->

<html>
  <head>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    <title>Hello App Engine</title>
  </head>

  <body>
    <h1>Hello App Engine!</h1>
    <table>
      <tr>
        <td colspan="2" style="font-weight:bold;">Available Servlets:</td>        
      </tr>
      <tr>
        <td><a href="jspexampleingae">JspExampleinGAE</a></td>
      </tr>
    </table>
  </body>
</html>


Deploy this web application into google app engine







Labels:

Comments

  1. BloggerWednesday, 26 February 2020 at 10:24:00 GMT+5:30

    Use this diet hack to drop 2 lb of fat in just 8 hours

    More than 160 thousand women and men are trying a simple and SECRET "water hack" to burn 1-2lbs each night while they sleep.

    It is painless and works with everybody.

    Just follow these easy step:

    1) Get a clear glass and fill it half full

    2) And now do this strange HACK

    and become 1-2lbs thinner the next day!

    ReplyDelete

Post a Comment

Share this to your friends

Popular posts from this blog

Guidewire Rating detailed explanations

By
Guidewire Rating is a critical component of Guidewire PolicyCenter that handles the calculation of insurance premiums based on various factors, such as risk characteristics, coverage options, and discounts. Here's a detailed explanation of how Guidewire Rating works, its components, and how it can be configured and extended. 1. Overview of Guidewire Rating Guidewire Rating is responsible for determining the price of an insurance policy by applying rating logic, rules, and algorithms to the insured's data. The rating process involves evaluating factors like the type of coverage, the insured risk (e.g., the driver’s record, vehicle type in auto insurance), and the chosen limits and deductibles. The output is a premium amount that the policyholder must pay. 2. Key Components of Guidewire Rating a. Rating Engine The Rating Engine is the core system within PolicyCenter that processes rating inputs and outputs premium calculations. It interprets rating formulas, applies them to speci...
Post a Comment
Read more

Java Swing MySql JDBC: insert data into database

By
Program import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.sql.*; public class insertswing implements ActionListener {   JFrame fr;JPanel po;   JLabel l1,l2,main;   JTextField tf1,tf2;   GridBagConstraints gbc;   GridBagLayout go;   JButton ok,exit; public insertswing(){ fr=new JFrame("New User Data "); Font f=new Font("Verdana",Font.BOLD,24); po=new JPanel(); fr.getContentPane().add(po); fr.setVisible(true); fr.setSize(1024,768); fr.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); po.setBackground(Color.WHITE); go=new GridBagLayout(); gbc=new GridBagConstraints(); po.setLayout(go); main=new JLabel("Enter User Details "); main.setFont(f); l1=new JLabel("Name  :");tf1=new JTextField(20); l2=new JLabel("User Name  :");tf2=new JTextField(20); ok=new JButton("Accept"); exit=new JButton("Exit"); gbc.anchor=GridBagConstraints.NORTH;gbc.gridx=5;gbc.gridy=0; go.s...
Post a Comment
Read more

JSP and Servlet Form Submission without page refresh show results on the same page using Jquery AJAX

By
Code Snippet HTML Form  <form id='ajaxform' name='ajaxform' action='ajaxformexample' method='post'>  First Name: <input type='text' id='firstname' name='firstname' size='30' required/><br/>  Last Name: <input type='text' id='lastname' name='lastname' size='30'required/><br/>  Email:  <input type='email' id='emailid' name='emailid' size='30'required/><br/>  Password:  <input type='password' id='pwd' name='pwd' size='30'required/><br/>  <input type='Submit'/>   <div id='content'> </div> </form> the above HTML Form uses post method and url servlet redirect to " ajaxformexample " Javascript Code  var form = $('#ajaxform'); // id of form tag  form.submit(function () {  $.ajax({  ...
46 comments
Read more