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#348 - Data Tranfer Object : customer client request customer details to server at one shot.

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Gopinath Langote
2017-08-11 16:17:51 +05:30
parent 229fda9f3c
commit df9be78504
4 changed files with 90 additions and 7 deletions
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data-transfer-object/src/main/java/com/iluwatar/datatransfer/CustomerClientApp.java Normal file
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/*
* The MIT License (MIT)
*
* Copyright (c) 2017 Gopinath Langote
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.iluwatar.datatransfer;
import java.util.ArrayList;
import java.util.List;
/**
* The Data Transfer Object pattern is a design pattern in which an data transfer object is used to serve related
* information together to avoid multiple call for each piece of information.
* <p>
* In this example, ({@link CustomerClientApp}) as as customer details consumer i.e. client to request for
* customer details to server.
* <p>
* CustomerResource ({@link CustomerResource}) act as server to serve customer information.
* And The CustomerDto ({@link CustomerDto} is data transfer object to share customer information.
*/
public class CustomerClientApp {
/**
* Method as act client and request to server for details.
*
* @param args program argument.
*/
public static void main(String[] args) {
List<CustomerDto> customers = new ArrayList<>();
CustomerDto customerOne = new CustomerDto("1", "Kelly", "Brown");
CustomerDto customerTwo = new CustomerDto("2", "Alfonso", "Bass");
customers.add(customerOne);
customers.add(customerTwo);
CustomerResource customerResource = new CustomerResource(customers);
System.out.println("All customers:-");
List<CustomerDto> allCustomers = customerResource.getAllCustomers();
printCustomerDetails(allCustomers);
System.out.println("----------------------------------------------------------");
System.out.println("Deleting customer with id {1}");
customerResource.delete(customerOne.getId());
allCustomers = customerResource.getAllCustomers();
printCustomerDetails(allCustomers);
System.out.println("----------------------------------------------------------");
System.out.println("Adding customer three}");
CustomerDto customerThree = new CustomerDto("3", "Lynda", "Blair");
customerResource.save(customerThree);
allCustomers = customerResource.getAllCustomers();
printCustomerDetails(allCustomers);
}
private static void printCustomerDetails(List<CustomerDto> allCustomers) {
allCustomers.forEach(customer -> System.out.println(customer.getFirstName()));
}
}