Wednesday Mar 30, 2016

Last Interactive Online Java Webinar with Q&A

The Virtual Technology Summit (VTS) delivers interactive Java technical content from Java Champions and Oracle experts to your desk.  

The interactive, online event, is sponsored by the Oracle Technology Network (OTN). The April 5 event is the last one in this VTS series. It features six Java technical sessions about Java EE, cloud, and Java SE API. Register now

The Java Track includes three code-heavy sessions:

Java on Mobile: Thanks to innovations in mobile JVM's and the availability of JavaFX on iOS and Android, it is now possible to write applications once (in Java) and deploy them on the major mobile platforms. In this session, we will show how easy it is to create a highly-polished Material Design Java application, and to deploy it on an Android device and an iOS device with exactly the same code used in both deployments.

Asynchronous programming in Java 8: how to use CompletableFuture: This presentation aims to explain how the patterns introduced by this interface and its implementing class are new to the Java platform, and how they fill the gap in the old Future patterns.The different models are precisely presented: how to create complex asynchronous processing pipelines, how to deal with exceptions, how to test complex code. 

Down-to-Earth Microservices with Java EE: the session explores microservices using a simple but representative example using Java EE. You'll see how the Java EE programming model and APIs like JAX-RS, WebSocket, JSON-P, Bean Validation, CDI, JPA, EJB 3, JMS 2 and JTA aligns with the concept of microservices.

Java SE 8 for Java EE Developers: Java SE 8 brings a bounty of improvements. In this session, you will learn about Lambda expressions, a new Date and Time API, the Streams API, Completable Futures, Nashorn, Repeatable Annotations, String joiners, etc.

Thinking Beyond ORM in JPA:  This session discusses native-query support in JPA along with stored procedures and result set mappings in JPA 2.1. The presented code samples illustrate the details of the API, highlighting their strengths and weaknesses. Our analysis reveals applicable use cases and most popular approaches. The summary provides guidelines on how and when to utilize native queries.

Visualizing Data in the Cloud with Oracle JET: Oracle JET is a free and open source toolkit, providing a solid basis for enterprise JavaScript applications, including built-in solutions for accessibility, modularity, and data visualization. In this code-driven session, you will learn everything you need to know to create maintainable enterprise applications in JavaScript!

Monday Jan 09, 2012

Interfaces on Demand with CDI and EJB 3.1

A new article by Java Champion Adam Bien, up on otn/java, “Interfaces on Demand with CDI and EJB 3.1” explains that since Java EE 6, interfaces are no longer required by the container in order to realize common use cases, thus enabling developers to use them more consciously and strategically for the realization of business logic. Bien shows how interfaces can now be used as vehicles for encapsulation or abstraction, as they were originally intended.

From the article:

“There is nothing wrong with the abstraction of every implementation with an interface if such an approach can be clearly justified, but interfaces become dubious when you have to introduce artificial naming conventions to avoid name clashes…
Interfaces should be introduced only as a contract for already existing classes, for the realization of Strategy or Bridge patterns, or when you need to design an API, such as Java Database Connectivity (JDBC), Java Message Service (JMS), and so on. In typical business applications, this occurs in only a fraction of all cases.”
Read the complete article here.


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