Latest Articles

26 April 2014

In this article we will see how to implement a Java EE CDI portable extension from scratch. CDI extensions are used mainly by framework developers (ex: Apache DeltaSpike project, the former MyFaces CODI).

Java EE CDI portable extensions is an API that provides the means for an application to listen for specific CDI container initialization events and act accordingly, like completely modify CDI beans me... Read more

Java EE - Add CDI Interceptor programmatically

08 April 2014

In this article we will see how to programmatically add a CDI interceptor to a CDI managed bean.

Java EE interceptors may be used along with CDI managed beans. This means that one may use an interceptor in order to intercept calls to CDI managed beans methods and do some pre or post processing in... Read more

cdi cdi-extensions interceptors java-ee

Java EE 7 CDI bean scopes

26 February 2014

In this article we will cover the CDI bean scopes that were introduced by Java EE 7.

Java EE 7 introduced a new set of CDI bean scopes. In the next sections we will summarize each one of the aforementioned scopes while providing links to other articles that will describe them in detai... Read more

cdi java java-ee

Java EE CDI ViewScoped example

20 February 2014

In this tutorial we will cover the Java EE CDI ViewScoped scope.

Java EE 7 introduced a new set of CDI bean scopes. One of them - and the one we will cover in this article - is the view scope. As with other CDI beans, we configure a view scoped bean by using the @V... Read more

cdi java-ee jsf web

Java EE CDI TransactionScoped example

05 February 2014

In this article we will cover the Java EE CDI TransactionScoped scope.

Java EE 7 introduced a new set of CDI bean scopes. One of them - and the one we will cover in this article - is the transactional scope. As with other CDI beans, we configure a transactional scoped be... Read more

cdi java java-ee

Java EE CDI - Inject beans from external (3rd party) libraries example

23 June 2013

In this tutorial we will see how to inject beans from external - or 3d party - libraries in Java EE CDI

When we need an external JAR to be scanned by a Java EE container for CDI beans we must define the JAR as a target for CDI bean scanning, ie. via beans.xml file. What if the JAR is provided by an exte... Read more

cdi java java-ee

Java EE CDI programmatic dependency disambiguation example - Injection Point inspection

08 June 2013

In this tutorial we will see how to implement Java EE CDI dependency disambiguation in a programmatic (or dynamic) way by inspecting injection points. The same applies for programmatic dependency resolution at runtime.

In Java EE CDI it is possible to provide multiple implementations of a given interface - or service - to the service clients. In this tutorial we will see how to implement a dynamic mechanism for fetc... Read more

cdi java java-ee

Java EE CDI dependency disambiguation example

01 June 2013

In this tutorial you will learn how to inject multiple interface implementations with Java EE CDI (dependency disambiguation) avoiding org.jboss.weld.exceptions.DeploymentException: WELD-001409 Ambiguous dependencies for type [...] with qualifiers [...] at injection point [...]

In Java EE CDI it is possible to provide multiple implementations of a given interface - or service - to the service clients. The client should then be responsible for selecting the desired service im... Read more

cdi java java-ee

About the author

Gonçalo Marques is a Software Engineer with several years of experience in software development and architecture definition. During this period his main focus was delivering software solutions in banking, telecommunications and governmental areas. He created the Bytes Lounge website with one ultimate goal: share his knowledge with the software development community. His main area of expertise is Java and open source.

GitHub profile: https://github.com/gonmarques

He is also the author of the WiFi File Browser Android application: