Skip to Content
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

Setter injection

As its name suggests, here dependency injection is done through setter methods exposed publicly. Any dependency not required at the time of client object instantiation is called optional dependency. They can be set at a later stage after a client object is created.

Setter injection is a perfect fit for optional or conditional dependency. Let's apply a setter injection to the BalanceSheet module.

The code would look as follows:

public class BalanceSheet {  private IExportData exportDataObj= null;  private IFetchData fetchDataObj= null;    //Setter injection for Export Data   public void setExportDataObj(IExportData exportDataObj) {    this.exportDataObj = exportDataObj;  }  //Setter injection for Fetch Data public void setFetchDataObj(IFetchData ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Pro CDI 2 in Java EE 8: An In-Depth Guide to Context and Dependency Injection

Pro CDI 2 in Java EE 8: An In-Depth Guide to Context and Dependency Injection

Jan Beernink, Arjan Tijms
Dependency Injection

Dependency Injection

Dhananjay Prasanna

Publisher Resources

ISBN: 9781788296250Supplemental Content