CODEWITHSUNDEEP
javacdidesktop-application
Gregory
Gregory

Reputation: 433

CDI with desktop application

Have some business logic using CDI (@javax.inject.Inject and @javax.persistence.PersistenceUnit). Want reuse it inside desctop application.

Added beans.xml into META-INF folder. Set Java 7 as default. Wrote simple class:

public class Main {

       @Inject
       private static AggregatedUserQueries aggregatedUserQueries;

       public static void main(String[] args) {
             System.out.println(aggregatedUserQueries);
       }
}

Of course it prints "null" to console. Are there any way to use CDI with desctop application?

Upvotes: 2

Views: 1623

Answers (2)

olexd
olexd

Reputation: 1420

As mentioned @Boris Pavlović, you can bootstrap Weld and get beans programmatically. However, it is possible to get injection working too. You need to define startup method in your desktop application which will "replace" your public static void main(String ... args). Consider:

public class Main {

    @Inject
    private Bean bean;

    public void startup(@Observes ContainerInitialized event) {
        this.bean.sayHello();
    }
}

This startup() method will be invoked when Weld is bootstraped. You can achieve it by executing org.jboss.weld.environment.se.StartMain as a main class.

Upvotes: 3

Boris Pavlović
Boris Pavlović

Reputation: 64632

Add weld to your project

<dependency>
  <groupId>org.jboss.weld.se</groupId>
  <artifactId>weld-se</artifactId>
  <version>2.2.12.Final</version>
</dependency>

then somewhere in your application initialize it:

WeldContainer weld = new Weld().initialize();

and lookup a bean:

AggregatedUserQueries queries = 
  weld.instance().select(AggregatedUserQueries.class).get();

Upvotes: 1

Related Questions