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Java 9: Building Robust Modular Applications
book

Java 9: Building Robust Modular Applications

by Dr. Edward Lavieri, Peter Verhas, Jason Lee
April 2018
Intermediate to advanced content levelIntermediate to advanced
910 pages
33h 21m
English
Packt Publishing
Content preview from Java 9: Building Robust Modular Applications

Dependency injection with CDI

Java EE provides a framework such as CDI. With CDI, we can inject any container-controlled object into another with compile-time type safety. The problem, though, is the objects in question need to be container controlled, which our MongoDB API objects are not. Fortunately, CDI provides a means by which the container can create these instances, a facility known as producer methods. What might this look like? Let's start with the injection point, as that is the simplest piece:

    @Inject 
    @Collection("notes") 
    private MongoCollection<Document> collection; 

When the CDI container sees @Inject, it inspects the element the annotation is on to determine the type. It will then attempt to look up an instance that will satisfy ...

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Publisher Resources

ISBN: 9781788832823Supplemental ContentOtherPurchase LinkErrata Page