Latest Articles

Java EE CDI beans deployed in external library (WEB-INF/lib JAR file)

20 May 2013

In this tutorial we will see how to deploy CDI beans contained in an external JAR file avoiding org.jboss.weld.exceptions.DeploymentException: WELD-001408 Unsatisfied dependencies for type [...] with qualifiers [@...] at injection point ... exception.

One of the objectives of the beans.xml file in a CDI application is to notify the container where to search for CDI managed beans. In this short tutorial we will see how to configure a JAR file - cont... Read more

Modal dialog (popup) from Android widget example

11 May 2013

In this tutorial you will learn how to open a modal popup (or dialog) from an Android home screen widget.

Android widgets only contain a subset of the available UI components and functionality when compared to Android activities. This means that if we have a requirement that needs something a bit more sop... Read more

android java widget

Java EE CDI Disposer methods example

04 May 2013

In this tutorial you will learn how to use CDI Disposer methods in order to perform clean up of resources created by CDI Producer methods.

CDI Producer methods may be used to create resources that are consumed by an application in a very specific context. These resources may need to be cleaned up by the container when the application doe... Read more

cdi java java-ee

Java EE CDI Producer methods tutorial

27 April 2013

In this tutorial you will learn how to use CDI Producer methods in order to provide a flexible bean initialization mechanism. Concepts like polymorphism, disambiguation and CDI scopes will also be discussed as we proceed in the tutorial.

Java EE CDI introduced a concept called Producer. Producers may be used to create - or produce - bean instances to be consumed by an application. Producers are also able to provide specific interface ... Read more

cdi java java-ee

Postfix + OpenDKIM (DKIM) configuration example

20 April 2013

In this tutorial you will learn how to configure Postfix together with OpenDKIM in order to send signed messages according to DomainKeys Identified Mail (DKIM).

One of the standard and widely used email message sender authentication mechanism is DomainKeys Identified Mail (DKIM). DKIM relies in private/public key pair cryptography (asymmetric cryptography).Th... Read more

admin configuration dkim linux mail opendkim postfix smtp

Java EE CDI ConversationScoped example

13 April 2013

In this tutorial you will learn how to use ConversationScoped CDI beans.

As we have seen previously on Java EE CDI bean scopes CDI provides a set of available built-in bean scopes. One of these scopes is the Conversation scope. In this tutorial we will see how this scope c... Read more

cdi java java-ee tomcat web

Java EE CDI bean scopes

06 April 2013

In this tutorial you will learn in detail about the distinct bean scopes provided by CDI and how to use them.

When a managed bean is initialized by CDI the bean will be initialized in a very specific scope. The scope in which the bean is initialized will determine its lifecycle. CDI provides the following bea... Read more

cdi java java-ee

Postfix + Dovecot + SSL configuration example

30 March 2013

In this tutorial you will learn how to configure Postfix integrated with Dovecot. Dovecot will be used for user authentication and POP3 service. We will also configure our services to be available over SSL.

Postfix mail server delivers a high level of flexibility in what matters to configuration and customization. In this tutorial we will integrate Postfix with Dovecot in order to delegate user authentic... Read more

admin configuration dovecot linux mail postfix smtp ssl

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: