Tag Archives: concurrency

CompletionStage support in server-side JAX-RS

Posted on August 7, 2017 by Abhishek

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 … Continue reading →

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CDI (2.0) Async Events

Posted on June 11, 2017 by Abhishek

Glassfish 5 builds for Java EE 8 are rolling along… here is another Docker based example on Github. 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 … Continue reading →

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Using CDI with Java EE Concurrency Utilities

Posted on April 20, 2017 by Abhishek

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 … Continue reading →

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WebSocket endpoint as Singleton EJB

Posted on February 14, 2017 by Abhishek

By default … … a WebSocket implementation creates a new (server) endpoint instance per client. In case you need a single instance, you can implement this using a custom ServerEndpointConfig.Configurator (by overriding the getEndpointInstance method) The catch: you might have to sacrifice some … Continue reading →

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Video Blog: Automated Retry In Java EE applications

Posted on December 8, 2015 by Abhishek

The folks at Webucator have converted one of my previous blog posts (about automatically retrying operations in Java EE applications using Interceptors) into a video tutorial. Personally, I tend to stick to text only blogs due to lack of time … Continue reading →

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Implementing auto retry in Java EE applications

Posted on November 4, 2015 by Abhishek

Initially, I wanted to call this blog – ‘Flexible timeouts with interceptor driven retry policies‘ – but then I thought it would be too ‘heavy’. This statement, along with the revised title should (hopefully) give you an idea of what … Continue reading →

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Timeout policies for EJBs : how do they help…?

Posted on April 5, 2015 by Abhishek

EJB 3.1 introduced timeout related annotations as a part of its API. @AccessTimeout @StatefulTimeout Let’s quickly look at what they are and why are they important @AccessTimeout Specifies the time period after which a queued request (waiting for another thread … Continue reading →

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EJB 3.x : Lifecycle and Concurrency models (part 2)

Posted on August 31, 2014 by Abhishek

This is the second post of the two part series. The first part covered the life cycle and the concurrency behavior of Stateful and Stateless EJBs. I’ll cover Singleton EJBs in this post The Singleton pattern is arguably the most used (some times misused … Continue reading →

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EJB 3.x : Lifecycle and Concurrency models (part 1)

Posted on August 9, 2014 by Abhishek

Java EE component life cycle and concurrency related details might not be new for seasoned professionals, but it is something which can take time to sink in for beginners. As far as EJBs are concerned, understanding their life cycle (and related … Continue reading →

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