sebastiandaschner blog


Minimize turnaround times with Open Liberty’s dev mode

monday, august 19, 2019

I’ve uploaded a video in which I show how to reduce the turnaround times while writing Enterprise Java applications that are deployed on Open Liberty. The liberty:dev goal of the Maven plugin watches for file changes and applies the changes instantly, without the need to rebuild the whole deployment artifact.
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Enhanced CDI contexts & bulkheads with MicroProfile Context Propagation

thursday, july 25, 2019

When using CDI with asynchronous execution methods, such as a ManagedExecutorService, it’s traditionally not possible to access all of CDI’s scopes that were active in the originating thread. MicroProfile Context Propagation enables to define and pass thread execution contexts to completion stages where our code can access various CDI contexts despite being executed asynchronously. Additionally, Context Propagation allows to create managed executor services, that can be injected and used inside our beans, for example to realize bulkheads.
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Proposal on Jakarta EE’s innovation & relationship with MicroProfile

tuesday, july 23, 2019

At the JCrete unconference, a few of us were brainstorming about the vision of Jakarta EE and especially the relationship with MicroProfile. I wanted to start that discussion in order to get everybody on the same page especially how the relationship between Jakarta EE and MicroProfile, and Jakarta’s innovation should look like. I believe that a lot of us agree on things already, however, I believe it would accelerates the process if we start that discussion.
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Using metric tags with MicroProfile Metrics 2.0

saturday, july 20, 2019

Business-related metrics that are emitted from our application might contain parameters (i.e. tags or labels) for which a specific metric is being measured. Since MicroProfile Metrics 2.0 it’s possible to assign tags to specific metrics using the API.
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Video course — Effective keyboard usage for developers

monday, may 27, 2019

When I watch developers in projects, I usually see a lot of room for improvement in their keyboard usage. Most developers would agree that you’re more productive for the majority of development tasks, when you’re typing instead of using a mouse or touch screen.
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Hot-deploying into Kubernetes using Telepresence & WAD

saturday, may 11, 2019

When you’re testing your enterprise application in a Kubernetes environment, the turnaround for changing, re-packaging, and re-deploying your application can become quite high. Telepresence aims to mitigate this, by proxying a locally running process into our Kubernetes cluster, as if the local process were part of the cluster. If we combine that approach with a hot-redeploy tool such as WAD we can vastly improve our development productivity.
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Thoughts on the Jakarta EE package name change

wednesday, may 08, 2019

The Eclipse Foundation announced that Jakarta EE cannot continue to use the javax package name. Apparently this comes with the fact that while Java EE bases on this name, no further modifications are allowed to classes or packages starting with that name.
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Thoughts on Quarkus

monday, april 08, 2019

Quarkus, the new “supersonic, subatomic” Java framework is currently getting a lot of attention. The ideas behind this build and runtime tool are indeed more than interesting for the future of enterprise Java. What are the benefits and shortcomings of using Quarkus?
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