#jaxrs

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

Validate JAX-RS query parameters

  It’s easy to validate parameters in JAX-RS using filters – ContainerRequestFilter to be specific. There are other options at your disposal e.g. using (CDI or EJB) interceptors, or injecting (HttpServletRequest using @Context)

Scenario – Validate query parameter passed in by the caller

Steps

Implement filter

Extracts query parameter from ContainerRequestContext

Performs the validation – aborts…

Using CDI with Java EE Concurrency Utilities

This blog post explores usage of CDI along with Java EE Concurrency Utilities – specifically using CDI beans as managed tasks. Here is the sample application on Github

Lets begin with a quick overview

Java EE Concurrency Utilities provides APIs and constructs to manage concurrency within Java EE applications. Many of the Java EE components have specific concurrency semantics e.g. EJBs, JAX-RS…

Leveraging ‘Service Bindings’ in Oracle Application Container Cloud

Don’t forget to check out my new blog post on the Oracle Cloud Developer solutions community portal ! It demonstrates usage of Oracle Application Container Cloud and Database Cloud service. To be precise, it covers the following

An introduction to Service bindings (in Application Container Cloud) including setup + configuration and leveraging them to integrate with Oracle Database Cloud service

Nuances of JAX-RS client side async callback

Going async with JAX-RS

JAX-RS provides client side asynchronous behavior to complement its server side counterpart. It’s powered by the AysncInvoker interface – the best part if that you do not need to get hold of it explicitly. The fluent JAX-RS client API makes it available by including the async() call in your builder calls

e.g. ClientBuilder.newClient().target(“https://test.com”).reque…