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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

Constructor Injection

Constructor injection can be achieved  by using the @Inject annotation at the constructor level. This constructor ought to acknowledge class dependencies as arguments. Multiple constructors will, at that point, assign the arguments to their final fields:

public class AppConsumer {  private NotificationService notificationService;  //Constructor level Injection  @Inject  public AppConsumer(NotificationService service){       this.notificationService=service;  }    public boolean sendNotification(String message, String recipient){    //Business logic    return notificationService.sendNotification(message, recipient);  }}

If our class does not have a constructor with @Inject, then it will be considered a default constructor with no arguments. ...

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Publisher Resources

ISBN: 9781788296250Supplemental Content