Book Image

Domain-Driven Design with Java - A Practitioner's Guide

By : Premanand Chandrasekaran, Karthik Krishnan
Book Image

Domain-Driven Design with Java - A Practitioner's Guide

By: Premanand Chandrasekaran, Karthik Krishnan

Overview of this book

Domain-Driven Design (DDD) makes available a set of techniques and patterns that enable domain experts, architects, and developers to work together to decompose complex business problems into a set of well-factored, collaborating, and loosely coupled subsystems. This practical guide will help you as a developer and architect to put your knowledge to work in order to create elegant software designs that are enjoyable to work with and easy to reason about. You'll begin with an introduction to the concepts of domain-driven design and discover various ways to apply them in real-world scenarios. You'll also appreciate how DDD is extremely relevant when creating cloud native solutions that employ modern techniques such as event-driven microservices and fine-grained architectures. As you advance through the chapters, you'll get acquainted with core DDD’s strategic design concepts such as the ubiquitous language, context maps, bounded contexts, and tactical design elements like aggregates and domain models and events. You'll understand how to apply modern, lightweight modeling techniques such as business value canvas, Wardley mapping, domain storytelling, and event storming, while also learning how to test-drive the system to create solutions that exhibit high degrees of internal quality. By the end of this software design book, you'll be able to architect, design, and implement robust, resilient, and performant distributed software solutions.
Table of Contents (17 chapters)
Part 1: Foundations
Part 2: Real-World DDD
Part 3: Evolution Patterns

Understanding a letter of credit

A documentary Letter of Credit (LC) is a financial instrument issued by banks as a contract between an importer (or buyer) and an exporter (or seller). This contract specifies the terms and conditions of the transaction, under which the importer promises to pay the exporter in exchange for the goods or services provided by the exporter. An LC transaction typically involves multiple parties. A simplified summary of the parties involved is described as follows:

  • Importer: The buyer of the goods or services.
  • Exporter: The seller of the goods or services.
  • Freight forwarder: The agency that handles the shipment of goods on behalf of the exporter. This is only applicable in cases where there is an exchange of physical goods.
  • Issuing bank: The bank that the importer requests to issue the LC application. Usually, the importer has a preexisting relationship with this bank.
  • Advising bank: The bank that informs the exporter about the issuance...