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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

The basic idea behind setter-based DI is that once the object is created (mainly with no argument constructors), a setter can be called to supply the dependencies to form an object graph, or just to supply the mock object for testing purposes.

Constructor-based DI is appropriate if there are only a couple of constructor parameters. If there are lots of constructor parameters, it will look messy. Even multiple versions of a constructor will not help much. In this case, you should rely on setter-based DI.

Ideally, all optional or conditional dependencies should be supplied through setter-based DI. The drawback to this approach is that you should make sure the setter methods are called before a client object starts using it. ...

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Publisher Resources

ISBN: 9781788296250Supplemental Content