How can I inject dependencies based on conditions?

1. Which is the right way to inject dependency?
2. Can you give few examples of dependency injection?
3. How many ways can dependency injection be done?
4. What is dependency injection example?
5. How does @inject work?
6. What is the right way to inject dependency in Java?
7. How are component dependencies injected in a workflow?
8. How do dependency injection frameworks work?
9. What is the difference between Autowired and inject?
10. What is @inject annotation in Java?
11. Where @autowired can be used?

Which is the right way to inject dependency?

Constructor injection should be the main way that you do dependency injection. It's simple: A class needs something and thus asks for it before it can even be constructed. By using the guard pattern, you can use the class with confidence, knowing that the field variable storing that dependency will be a valid instance.

Can you give few examples of dependency injection?

Two popular dependency injection frameworks are Spring and Google Guice. The usage of the Spring framework for dependency injection is described in Dependency Injection with the Spring Framework - Tutorial. Also Eclipse RCP is using dependency injection.

How many ways can dependency injection be done?

There are three types of dependency injection — constructor injection, method injection, and property injection.

What is dependency injection example?

What is dependency injection? Classes often require references to other classes. For example, a Car class might need a reference to an Engine class. These required classes are called dependencies, and in this example the Car class is dependent on having an instance of the Engine class to run.

How does @inject work?

Injectable constructors are annotated with @Inject and accept zero or more dependencies as arguments. @Inject can apply to at most one constructor per class. @Inject is optional for public, no-argument constructors when no other constructors are present. This enables injectors to invoke default constructors.

What is the right way to inject dependency in Java?

The injector class injects dependencies broadly in three ways: through a constructor, through a property, or through a method. Constructor Injection: In the constructor injection, the injector supplies the service (dependency) through the client class constructor.

How are component dependencies injected in a workflow?

A-Parallel trigger components and Built. B-Use sequence triggers. C-Run unit test and build package. D-Build package firts and then perform the remaining tasks.

How do dependency injection frameworks work?

A DI framework basically takes care of that plumbing for you. By standing between you and the constructor, it can interrogate config (maybe XML, maybe code) that tells it what to do when it needs a concrete object.

What is the difference between Autowired and inject?

@Inject and @Autowired both annotations are used for autowiring in your application. @Inject annotation is part of Java CDI which was introduced in Java 6, whereas @Autowire annotation is part of spring framework. Both annotations fulfill same purpose therefore, anything of these we can use in our application.

What is @inject annotation in Java?

@Inject annotation is a standard annotation, which is defined in the standard "Dependency Injection for Java" (JSR-330). Spring (since the version 3.0) supports the generalized model of dependency injection which is defined in the standard JSR-330.

Where @autowired can be used?

The @Autowired annotation provides more fine-grained control over where and how autowiring should be accomplished. The @Autowired annotation can be used to autowire bean on the setter method just like @Required annotation, constructor, a property or methods with arbitrary names and/or multiple arguments.