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Johannes Geppert

Notes from work, open source, and a biography in progress

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The Mieses book has a publisher

The Mieses book has a publisher

The self-publishing plan is gone. The Mieses biography will be published by Hentrich & Hentrich in spring 2027, German first, with an English edition in preparation.

Johannes Geppert 2026-09-102026-09-21 Biography No Comments Read more

How AI Read My Ancestor’s 1864 Russian Passport

How AI Read My Ancestor’s 1864 Russian Passport

In a folder of family papers my father owns, there is a folded sheet of heavy paper with a Russian imperial eagle at the top, a pressed seal at the bottom, and writing I cannot read. The print is in

Johannes Geppert 2026-05-172026-05-24 Biography No Comments Read more

Jacques Mieses: A Book That Started in the 1990s

Jacques Mieses: A Book That Started in the 1990s

Every Christmas, for most of my life, I have sat down with my father to play chess. He always wins. This is not a story about dramatic reversals. My ELO rating, if I had one, would probably be negative. We

Johannes Geppert 2026-05-032026-09-21 Biography 2 Comments Read more

Struts 2 vs. Spring Boot on AWS Lambda: Size, Memory, Speed

Struts 2 vs. Spring Boot on AWS Lambda: Size, Memory, Speed

Update, September 2026: The measurements below are from 2018, taken with the framework versions of the time and the Java 8 runtime on Lambda, so read them as historical. Two things would change a rerun. This test averaged 360 requests

Johannes Geppert 2018-05-072026-09-21 Java, API Gateway, AWS, Lambda, Spring, Struts2, Webservices No Comments Read more

The Apache Way of Open Source: My Talk at re:publica 2018

The Apache Way of Open Source: My Talk at re:publica 2018

In May 2018 I spoke at re:publica in Berlin for the first time. Newthinking invited me to give a short talk in their exhibition program about The Apache Software Foundation and how its projects govern themselves. The slides are on

Johannes Geppert 2018-05-042026-09-21 Apache No Comments Read more

Struts2 jQuery Plugin Version 4.0.1 with support for Struts 2.5 and for jQuery Datatables is released

The version 4.0.1 of the Struts2 jQuery Plugin is now finally available in the maven repository. This is the first released version which is compatible with latest Struts 2.5.x version. This version contains some breaking changes, so please update carefully!

Johannes Geppert 2016-12-062023-05-30 Allgemein, Java, jQuery, Projekte, Struts jQuery Plugin, Struts2 No Comments Read more

My ApacheCon Core Europe 2015 Talk: Struts 2 and AngularJS

My ApacheCon Core Europe 2015 Talk: Struts 2 and AngularJS

In October 2015 I spoke at ApacheCon: Core Europe in Budapest, the Apache Software Foundation’s own conference. The talk showed how to build Java web applications with Apache Struts 2 on the server and AngularJS in the browser, and what

Johannes Geppert 2015-10-062026-09-21 Java, Apache, Struts2 1 Comment Read more

AngularJS with Java: A Web App on a Struts 2 JSON Backend

Update, September 2026: AngularJS reached its end of life on December 31, 2021 and gets no more security fixes, so don’t start a new project with it. The back end half of this tutorial still holds. A Struts action that

Johannes Geppert 2015-05-182026-09-21 Java, Allgemein, Apache, Struts2 1 Comment Read more

Struts2 Bootstrap and jQuery plugin are now migrated to github

Google does not invest resources to Google Code anymore. There is no progress over years and first feature, the Download section, was turned off. So I decided to migrate Struts2 jQuery Plugin and Struts2 Bootstrap plugin to new locations on

Johannes Geppert 2014-06-06 Java, Projekte, Struts jQuery Plugin, Struts2, Struts2 Bootstrap Plugin No Comments Read more
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