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Java 9 Dependency Injection
book

Java 9 Dependency Injection

by Nilang Patel, Krunal Patel
April 2018
Intermediate to advanced content levelIntermediate to advanced
246 pages
6h 11m
English
Packt Publishing
Content preview from Java 9 Dependency Injection

The single responsibility principle

Let's understand how circular dependency can be eliminated by applying the single responsibility principle. Let's assume you are following three modules in a system:

  • Salary module
  • Employee module
  • HR module

The Salary module generates salary and sends it over email. Generating salary depends upon the Employee module. To get a few details, such as the appraisal process, and reward points the Employee module depends upon the HR module. At this moment, the dependency hierarchy will be as shown in the following diagram:

At some point in time, let's say you need email functionality in the HR module. Since email ...

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Publisher Resources

ISBN: 9781788296250Supplemental Content