#javaee8

https://www.ibm.com/developerworks/library/j-whats-new-in-javaee-8/index.html

The much-anticipated release of Java™ EE 8 is nearly upon us. This first release of the Java enterprise platform since June 2013 is half of a two-part release culminating with Java EE 9. Oracle has strategically repositioned Java EE, emphasizing technologies that support cloud computing, microservices, and reactive programming. Reactive programming is now woven into the fabric of many Java EE APIs, and the JSON interchange format underpins the core platform.

New release: REST assured with JAX-RS

    REST assured with JAX-RS is now updated for JAX-RS 2.1 – a new chapter has been added to cover its new features. You can read it on Gitbook or grab it via Leanpub

Cheers!

Handling custom objects with JAX-RS SSE API

Information sent using the JAX-RS 2.1 SSE support (in Java EE 8) does not only have to be of String type – it supports Java primitives (Integer , Long etc.), JSON-B & JAX-B annotated types as well as custom objects whose encoding process (Java object to on-wire format) is defined using a MessageBodyWriter implementation

Here is simple example you can try out – no need to setup anything except Doc…

CompletionStage support in server-side JAX-RS

JAX-RS 2.1 (part of Java EE 8) now supports returning a CompletionStage to mark the request as eligible for asynchronous processing. This is in addition to the AsyncResponse API which has been available since JAX-RS 2.0 (Java EE 7)

Even the Client API has added support for reactive-style programming by providing support for CompletionStage API, but this blog will focus on the server-side support

JAX-RS 2.1 SSE Client API example using Glassfish 5 on Docker

Along with the Server API for SSE, JAX-RS 2.1 (part of Java EE 8) has also has an equivalent client side API

Here is a quick peek – you can grab the project from Github

To summarize

we use a @Singleton EJB with @Startup

during initialization

create a single action (one time) Timer  i.e. @PostConstruct

and instantiate the SSEEventSource – its a public SSE source

when the timer expires, the @Time…

Try out JSON-B 1.0, JPA 2.2 using Java EE 8 on Glassfish 5 & Docker

Glassfish 5 Build 11 is now available – with support for many of the Java EE 8 specifications e.g. JAX-RS 2.1, JPA 2.2, JSON-B 1.0 etc. For more details check out the Aquarium space. This blog covers

test driving couple of new additions in this build – JSON-B 1.0 and JPA 2.2

we run this in a container, thanks to the Glassfish 5 nightly Docker image

Application

It’s a simple one – available on…

CDI (2.0) Async Events

Glassfish 5 builds for Java EE 8 are rolling along… here is another example. This time it’s asynchronous events in CDI 2.0 (JSR 365)

Steps

Just follow the README… just a bunch of docker commands to get started..!

What’s going on

Here is a quick summary

A Java EE scheduler triggers asynchronous CDI events (fireAsync())

These CDI events are qualified (using a custom Qualifier)

Two (async) CDI…

kafEEne #1: Websocket & Kafka

Say hello  to kafEEne ! A blog series which will show Kafka and Java EE examples

This one is about Kafka + (Java EE) Websocket API. Code is on Github and you can refer to the README on how to get this up and running using Docker. Although the focus is on Websocket, here is a list of other Java EE specs which have been used – EJB, CDI & a bit of JSON-B (part of Java EE 8)

Websocket based dashboard