"Welcome To Ashok IT"				
			                  "Spring Boot and MicroServices"
                                           Topic : SpringBootMVC Development
                                           Date  : 26/11/2024
                                              (Session - 75)                               
_____________________________________________________________________________________________________________________________

* We Will Complete First Spring Boot MVC Application with below concepts

1) Sending Request to Webapplication with out context-path(WebApplicationName)
==============================================================================
       
       http://localhost:1234/wishByUser?username=Mahesh
       
       http://localhost:1234/wishes

2) Sending Request to Webapplication with context-path
======================================================

application.properties
======================
#changing the port no
server.port=1234

# configure the prefix,suffix of view resolver
spring.mvc.view.prefix=/views/
spring.mvc.view.suffix=.jsp

#Configuring the context path for spring boot application
server.servlet.context-path=/30_SpringBootMVC_App

Request the Webpage with below URL
===================================
http://localhost:1234/30_SpringBootMVC_App/wishByUser?username=Ashok

http://localhost:1234/30_SpringBootMVC_App/wishes

3) Developing the Enquiry Form with BootStrap library
=====================================================
* BootStrap is Frontend framework which provides predefined the css class

      text-primary  >>>>>>>>>>>>>> Displays text as blue color

      text-danger   >>>>>>>>>>>>>> Displays text as red color

      text-success  >>>>>>>>>>>>>> Displays text as Greencolor

      container     >>>>>>>>>>>>>> Grouping the several html component into single block and all these Html elements are 				           organized into center of webpage.

* As programmer if we need to utilize the bootstrap library we just need to include bootstrap.css file into our webpage.

     bootstrap.css     >>>>>>>>>> Original File

     bootstrap-min.css >>>>>>>>>> Minified File(Compressed Version)

* We can link the css file into our JSP page by using html tag called <link>

      <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.2/dist/css/bootstrap.min.css"></link>

4) Developing the Request Processor Method For Handling Form Data.
==================================================================

Request Flow
=============
	       (1)                     (2)                           (3)                    (4)                     
Web Browser <----->DispatcherServlet<----------->EnquiryController <------>EnquiryService<------------> EnquiryDao<------>DB

Notes
===== 
(1) WebBrowser will send request through form submission to DispatcherServlet.
    
(2) DispatcherServlet will delegate the request to EnquiryController PostRequestProcessor Method and this method collects the     form data into EnquiryDTO object.

(3) EnquiryController will communicate with EnquiryService by passing the EnquiryDTO Object as parameter of EnquiryService        class method.

(4) In the Service Class Method we are doing below things

*** Here we are converting the EnquiryDTO Object into Enquiry Entity Object and Viceversa because as Service class will           receive the data in DTO Object but we need to pass Enquiry Entity object to DAO layer to persist the Data

			       Contains
         EnquiryDTO.java  <---------------> Form Submitted Data

         Enquiry.java     <---------------> Entity Class used for saving data into DB


*** Now Here we need to convert the object from one type(DTO) to another Type(Entity) this is can be achieved with below 
    approaches

         1) Manually

         2) ModelMapper API

*** In our Application we use ModelMapper API to convert the objects from one type to another type in very simple manner with     below approach.

pom.xml
=======
<dependency>
    <groupId>org.modelmapper</groupId>
    <artifactId>modelmapper</artifactId>
    <version>3.1.1</version>
</dependency>

Application.java
=================
* Mark the ModelMapper class as Spring bean with below configuration because we can consider as Singleton and easily can   autowire anywhere in application

	@Bean
	public ModelMapper getModelMapper() {
		return new ModelMapper();
	}


EnquiryServiceImpl.java
=======================
        @Override
	public EnquiryDTO createEnquiry(EnquiryDTO enquirydto) {
		
		//Converting from EnquiryDTO Object into Entity Class Object
		Enquiry enquiry = modelMapper.map(enquirydto,Enquiry.class);		
		enquiry.setCreatedDate(new java.util.Date());
		
                //Saving enquiry Information into database
		Enquiry savedEnquiry = enquiryDao.save(enquiry);
		
		//Converting from Entity Class Object into EnquiryDTO class Object		
		EnquiryDTO enqDto =  modelMapper.map(savedEnquiry, EnquiryDTO.class);

                return enqDto;
	}

* We need to following starters for existing Spring Boot MVC Application 

    1) MySQL Jdbc Driver

    2) Spring Data JPA

* Develop the following entity,service,dao classes as below
       
       com.ashokit.entity
              | -> Enquiry.java
       com.ashokit.beans
              | -> EnquiryDTO.java
       com.ashokit.dao
              | -> EnquiryDao.java
       com.ashokit.service
              | -> EnquiryService.java
	      | -> EnquiryServiceImpl.java
       com.ashokit.controller
              | -> EnquiryController.java

Enquiry.java
============
package com.ashokit.Entity;

import java.util.Date;

import jakarta.persistence.Column;
import jakarta.persistence.Entity;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.GenerationType;
import jakarta.persistence.Id;
import jakarta.persistence.Table;
import jakarta.persistence.Temporal;
import jakarta.persistence.TemporalType;

@Table
@Entity(name="ashokit_enquires")
public class Enquiry {

	@Id
	@Column(name="enquiry_id")
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	private Integer enquiryId;
	
	@Column(name="enquiry_name")
	private String name;

	@Column(name="contact_no")
	private String contactNo;

	@Column(name="email")
	private String emailId;

	@Column(name="course")
	private String courseName;
	
	@Column(name="created_dt")
	@Temporal(TemporalType.DATE)
	private Date createdDate;
	
	public Enquiry() {

	}
	
	public Enquiry(Integer enquiryId, String name, String contactNo, String emailId, String courseName) {
		super();
		this.enquiryId = enquiryId;
		this.name = name;
		this.contactNo = contactNo;
		this.emailId = emailId;
		this.courseName = courseName;
	}

	public Enquiry(String name, String contactNo, String emailId, String courseName) {
		super();
		this.name = name;
		this.contactNo = contactNo;
		this.emailId = emailId;
		this.courseName = courseName;
	}

	public void setEnquiryId(Integer enquiryId) {
		this.enquiryId = enquiryId;
	}
	
	public Integer getEnquiryId() {
		return enquiryId;
	}
	
	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getContactNo() {
		return contactNo;
	}

	public void setContactNo(String contactNo) {
		this.contactNo = contactNo;
	}

	public String getEmailId() {
		return emailId;
	}

	public void setEmailId(String emailId) {
		this.emailId = emailId;
	}

	public String getCourseName() {
		return courseName;
	}

	public void setCourseName(String courseName) {
		this.courseName = courseName;
	}
	
	public void setCreatedDate(Date createdDate) {
		this.createdDate = createdDate;
	}
	
	public Date getCreatedDate() {
		return createdDate;
	}

	@Override
	public String toString() {
		return "Enquiry [enquiryId=" + enquiryId + ", name=" + name + ", contactNo=" + contactNo + ", emailId="
				+ emailId + ", courseName=" + courseName + "]";
	}
}


EnquiryService.java
===================
package com.ashokit.service;

import com.ashokit.beans.EnquiryDTO;

public interface EnquiryService {
	
	public EnquiryDTO createEnquiry(EnquiryDTO enquiry);

}


EnquiryServiceImpl.java
=======================
package com.ashokit.service;

import org.modelmapper.ModelMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.ashokit.Entity.Enquiry;
import com.ashokit.beans.EnquiryDTO;
import com.ashokit.dao.EnquiryDao;

@Service
public class EnquiryServiceImpl implements EnquiryService {
	
	@Autowired
	private EnquiryDao enquiryDao;
	
	@Autowired
	private ModelMapper modelMapper;

	/*@Override
	public Enquiry createEnquiry(Enquiry enquiry) {
		
		//converting from beans(Enquiry) into Entity(Enquiry)
		com.ashokit.Entity.Enquiry dbEnquiry = modelMapper.map(enquiry, com.ashokit.Entity.Enquiry.class);
		
		//saved Enquiry Information
		com.ashokit.Entity.Enquiry savedEnquiryInfo = enquiryDao.save(dbEnquiry);
		
		//converting back from Entity(Enquiry) object to Bean(Enquiry)
		Enquiry enquiryInfo = modelMapper.map(savedEnquiryInfo, Enquiry.class);
		
		return enquiryInfo;
	}*/
	
	@Override
	public EnquiryDTO createEnquiry(EnquiryDTO enquirydto) {
		
		Enquiry enquiry = modelMapper.map(enquirydto,Enquiry.class);
		
		enquiry.setCreatedDate(new java.util.Date());
		Enquiry savedEnquiry = enquiryDao.save(enquiry);
		
		return modelMapper.map(savedEnquiry, EnquiryDTO.class);
	}

}


EnquiryDao.java
===============
package com.ashokit.dao;

import org.springframework.data.repository.CrudRepository;

import com.ashokit.Entity.Enquiry;

public interface EnquiryDao extends CrudRepository<Enquiry, Integer> {

}


EnquiryDTO.java
===============
package com.ashokit.beans;

public class EnquiryDTO {

	private Integer enquiryId;
	
	private String name;

	private String contactNo;

	private String emailId;

	private String courseName;

	public EnquiryDTO() {

	}
	
	public EnquiryDTO(Integer enquiryId, String name, String contactNo, String emailId, String courseName) {
		super();
		this.enquiryId = enquiryId;
		this.name = name;
		this.contactNo = contactNo;
		this.emailId = emailId;
		this.courseName = courseName;
	}

	public EnquiryDTO(String name, String contactNo, String emailId, String courseName) {
		super();
		this.name = name;
		this.contactNo = contactNo;
		this.emailId = emailId;
		this.courseName = courseName;
	}

	public void setEnquiryId(Integer enquiryId) {
		this.enquiryId = enquiryId;
	}
	
	public Integer getEnquiryId() {
		return enquiryId;
	}
	
	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getContactNo() {
		return contactNo;
	}

	public void setContactNo(String contactNo) {
		this.contactNo = contactNo;
	}

	public String getEmailId() {
		return emailId;
	}

	public void setEmailId(String emailId) {
		this.emailId = emailId;
	}

	public String getCourseName() {
		return courseName;
	}

	public void setCourseName(String courseName) {
		this.courseName = courseName;
	}

	@Override
	public String toString() {
		return "Enquiry [enquiryId=" + enquiryId + ", name=" + name + ", contactNo=" + contactNo + ", emailId="
				+ emailId + ", courseName=" + courseName + "]";
	}
}


Application.java
=================
package com.ashokit;

import org.modelmapper.ModelMapper;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

@SpringBootApplication
public class Application {

	public static void main(String[] args) {
		SpringApplication.run(Application.class, args);
	}
	
	@Bean
	public ModelMapper getModelMapper() {
		return new ModelMapper();
	}
}

EnquiryController.java
======================
package com.ashokit.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import com.ashokit.beans.EnquiryDTO;
import com.ashokit.service.EnquiryService;

@Controller
@RequestMapping("/enquiry")
public class EnquiryController {
	
	@Autowired
	private EnquiryService enquiryService;
	
	@GetMapping(value="/")
	public ModelAndView getHomePage() {
		ModelAndView mav = new ModelAndView("enquiryDetails");
		//Binding the Form with Java Object
		mav.addObject("enquiryForm", new EnquiryDTO());
		return mav;
	}
	
	@PostMapping(value="processEnquiry")
	public String handleEnquiry(@ModelAttribute("enquiryForm") EnquiryDTO enquirydto,
			 					ModelMap map) {
		
		//EnquiryDTO contains form data 
		 EnquiryDTO enquiry = enquiryService.createEnquiry(enquirydto);
		 map.addAttribute("enquiry", enquiry);
		 return "enquiryInfo";
	}
}


WelcomeController.java
======================
package com.ashokit.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;

@Controller
public class WelcomeController {
	
	@RequestMapping(value="/wishes", method=RequestMethod.GET)
	public String generateWelcomeMessage(Model model) {
	   model.addAttribute("Message", "Welcome To Ashok IT For Spring Boot MVC Development.....");
	   return "welcome";
	}
	
	@GetMapping(value = "/wishByUser")
	public ModelAndView generateWishesByUser(@RequestParam("username") String username) {
	   ModelAndView mav = new ModelAndView("welcome");
	   mav.addObject("wishMessage",String.format("Welcome To Ashok IT For Spring Boot MVC Development ...%s", username));
	   return mav;
	}
}


application.properties
======================
#changing the port no
server.port=1234

# configure the prefix,suffix of view resolver
spring.mvc.view.prefix=/views/
spring.mvc.view.suffix=.jsp

#Configuring the context path for spring boot application
server.servlet.context-path=/30_SpringBootMVC_App

#Datasource Configuration
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/31_springbootms_db
spring.datasource.username=root
spring.datasource.password=root

#Hibernate Configuration
spring.jpa.hibernate.ddl-auto=update
spring.jpa.show-sql=true


enquiryDetails.jsp
==================
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags/form" %>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Registration Page</title>
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
</head>
<body>
    <div class="container mt-5">
        <div class="row justify-content-center">
            <div class="col-md-6">
                <div class="card">
                    <div class="card-header bg-info">
                        <h4 class="text-danger bold">AshokIT Enquiry Form</h4>
                    </div>
                    <div class="card-body">
                        <spring:form action="processEnquiry" modelAttribute="enquiryForm">
                            <div class="form-group">
                                <label for="Name">Name</label>
                                <spring:input path="name" cssClass="form-control"/>
                            </div>
                            <div class="form-group">
                                <label for="EmailID">EmailID</label>
                                <spring:input path="emailId" cssClass="form-control" />
                            </div>
                            <div class="form-group">
                                 <label for="ContactNo">ContactNo</label>
                                 <spring:input path="contactNo" cssClass="form-control" />
                            </div>
                            <div class="form-group">
                                <label for="Course">Course</label>
		                        <spring:select path="courseName" cssClass="form-control">
										<spring:option value=""></spring:option>
										<spring:option value="Angular">AngularJS</spring:option>
										<spring:option value="React">ReactJS</spring:option>
										<spring:option value="SpringBoot">Spring Boot Framework</spring:option>
										<spring:option value="Microservices">Microservices</spring:option>
										<spring:option value="Aws">AWS</spring:option>
										<spring:option value="Devops">Devops</spring:option>
								</spring:select>
                            </div>
                            <button type="submit" class="btn btn-danger btn-block">Send Enquiry</button>
                        </spring:form>
                    </div>
                </div>
            </div>
        </div>
    </div>
</body>
</html>

welcome.jsp
===========
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<%@ taglib prefix = "c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>welcome.jsp</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.2/dist/css/bootstrap.min.css">
</head>
<body>
   <div style='text-align:center;color:red;'>
       <c:choose>
       		<c:when test="${Message ne null}">
       		    <div class="bg-primary">${Message}</div>
       		</c:when>
       		<c:otherwise>
       			<div class="bg-success">${wishMessage}</div>
       		</c:otherwise>
       </c:choose>
   </div>  
</body>
</html>

welcome.jsp
===========
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
	${enquiry.name}
	${enquiry.contactNo}
	${enquiry.emailId}
	${enquiry.courseName}
</body>
</html>


pom.xml
=======
<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>org.apache.tomcat</groupId>
			<artifactId>tomcat-jasper</artifactId>
			<version>10.1.12</version>
		</dependency>
		<dependency>
			<groupId>jakarta.servlet.jsp.jstl</groupId>
			<artifactId>jakarta.servlet.jsp.jstl-api</artifactId>
		</dependency>
		<dependency>
			<groupId>org.glassfish.web</groupId>
			<artifactId>jakarta.servlet.jsp.jstl</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-jpa</artifactId>
		</dependency>
		<dependency>
			<groupId>com.mysql</groupId>
			<artifactId>mysql-connector-j</artifactId>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>org.modelmapper</groupId>
			<artifactId>modelmapper</artifactId>
			<version>3.1.1</version>
		</dependency>
	</dependencies>
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