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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

Setter-based DI

Setter-based DI is generally used for optional dependencies. In case of setter-based DI, the container first creates an instance of your bean, either by calling a no-argument constructor or static factory method. It then passes the said dependencies through each setter method. Dependencies injected through the setter method can be re-injected or changed at a later stage of application.

We will understand setter-based DI with the following code base:

public class DocumentBase {  private DocFinder docFinder; //Setter method to inject dependency.  public void setDocFinder(DocFinder docFinder) {    this.docFinder = docFinder;  }  public void performSearch() {    this.docFinder.doFind();  }}public class DocFinder { public void doFind() { ...
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Publisher Resources

ISBN: 9781788296250Supplemental Content