Recent content in Java on juplohttps://juplo.de/en-USkai@juplo.de (Kai Moritz)kai@juplo.de (Kai Moritz)Kai Moritzhttps://juplo.de/implementing-the-outbox-pattern-with-kafka-part-1-the-outbox-table/https://juplo.de/implementing-the-outbox-pattern-with-kafka-part-1-the-outbox-table/This article is part of a Blog-SeriesSun, 14 Feb 2021 18:10:38 GMTkai@juplo.de (Kai Moritz)https://juplo.de/implementing-the-outbox-pattern-with-kafka-part-0-the-example/https://juplo.de/implementing-the-outbox-pattern-with-kafka-part-0-the-example/This article is part of a Blog-SeriesFri, 05 Feb 2021 17:59:38 GMTkai@juplo.de (Kai Moritz)https://juplo.de/how-to-instantiatiate-multiple-beans-dinamically-in-spring-boot-based-on-configuration-properties/https://juplo.de/how-to-instantiatiate-multiple-beans-dinamically-in-spring-boot-based-on-configuration-properties/In this mini-HowTo I will show a way, how to instantiate multiple beans dinamically in Spring-Boot, depending on configuration-properties. We will:Sat, 21 Nov 2020 10:12:57 GMTkai@juplo.de (Kai Moritz)https://juplo.de/deduplicating-partitioned-data-with-kafka-streams/https://juplo.de/deduplicating-partitioned-data-with-kafka-streams/Inspired by a current customer project and this article about deduplicating events with Kafka Streams I want to share a simple but powerful implementation of a deduplication mechanism, that works well for partitioned data and does not suffer of memory leaks, because a countless number of message-keys has to be stored.Sat, 10 Oct 2020 20:02:49 GMTkai@juplo.de (Kai Moritz)https://juplo.de/testing-exception-handling-in-spring-mvc/https://juplo.de/testing-exception-handling-in-spring-mvc/Specifying Exception-Handlers for Controllers in Spring MVCSat, 03 Oct 2020 15:00:17 GMTkai@juplo.de (Kai Moritz)https://juplo.de/using-jackson-without-annotations-to-quickly-add-logging-of-object-graphs-as-json/https://juplo.de/using-jackson-without-annotations-to-quickly-add-logging-of-object-graphs-as-json/Normally, you have to add Annotations to your classes, if you want to serialize them with Jackson. The following snippet shows, how you can configure Jackson in order to serialize vanilla classes without adding annotations. This is usefull, if you want to add logging-statements, that print out graphs of objects in JSON-notation for classes, that arSat, 15 Aug 2020 17:02:52 GMTkai@juplo.de (Kai Moritz)https://juplo.de/how-to-redirect-to-spring-security-oauth2-behind-a-gateway-proxy-hiding-the-app-behind-a-reverse-proxy-gateway/https://juplo.de/how-to-redirect-to-spring-security-oauth2-behind-a-gateway-proxy-hiding-the-app-behind-a-reverse-proxy-gateway/This post is part of a series of Mini-Howtos, that gather some help, to get you started, when switching from localhost to production with SSL and a reverse-proxy (aka gateway) in front of your app, that forwards the requests to your app that listens on a different name/IP, port and protocol.Mon, 09 Mar 2020 00:00:00 GMTkai@juplo.de (Kai Moritz)https://juplo.de/howto-redirect-to-spring-security-oauth2-behind-a-gateway-proxy-running-your-app-in-docker/https://juplo.de/howto-redirect-to-spring-security-oauth2-behind-a-gateway-proxy-running-your-app-in-docker/Switching From Tutorial-Mode (aka POC) To Production Is HardFri, 06 Mar 2020 22:02:44 GMTkai@juplo.de (Kai Moritz)https://juplo.de/actuator-httptrace-does-not-work-with-spring-boot-2-2/https://juplo.de/actuator-httptrace-does-not-work-with-spring-boot-2-2/In Spring Boot 2.2.x, you have to instanciate a * of type * to enable the HTTP Trace Actuator.Wed, 25 Dec 2019 00:00:00 GMTkai@juplo.de (Kai Moritz)https://juplo.de/encrypt-communication-between-kafka-and-zookeeper-with-tls/https://juplo.de/encrypt-communication-between-kafka-and-zookeeper-with-tls/1. Download and unpack zookeeper+tls.tgz. 1. Run README.sh for a fully automated example of the presented setup.Tue, 25 Jun 2019 00:00:00 GMTkai@juplo.de (Kai Moritz)https://juplo.de/show-spring-boot-auto-configuration-report-when-running-via-mvn-spring-boot-run/https://juplo.de/show-spring-boot-auto-configuration-report-when-running-via-mvn-spring-boot-run/There are a lot of explanations, how to turn on the Auto-Configuration-Report offered by Spring-Boot to debug the configuration of ones app. For an good example take a look at this little Spring boot troubleshooting auto-configuration guide. But most often, when I want to see the Auto-Configuration-Report, I am running my app via . And, unfortunatlThu, 23 Jun 2016 10:49:03 GMTkai@juplo.de (Kai Moritz)https://juplo.de/problems-deploying-a-spring-boot-app-as-war/https://juplo.de/problems-deploying-a-spring-boot-app-as-war/Spring-Boot-App Is Not Started, When Deployed As WARFri, 08 Apr 2016 20:38:35 GMTkai@juplo.de (Kai Moritz)https://juplo.de/hibernate-maven-plugin-2-0-0-released/https://juplo.de/hibernate-maven-plugin-2-0-0-released/Today we released the version 2.0.0 of hibernate-maven-plugin to Central!Wed, 09 Mar 2016 00:00:00 GMTkai@juplo.de (Kai Moritz)https://juplo.de/release-of-a-maven-plugin-to-maven-central-fails-with-error-unknown-tag-goal/https://juplo.de/release-of-a-maven-plugin-to-maven-central-fails-with-error-unknown-tag-goal/error: unknown tag: goalTue, 08 Mar 2016 00:29:46 GMTkai@juplo.de (Kai Moritz)https://juplo.de/develop-a-facebook-app-with-spring-social-part-07-what-is-going-on-on-the-wire/https://juplo.de/develop-a-facebook-app-with-spring-social-part-07-what-is-going-on-on-the-wire/In this series of Mini-How-Tow's I will describe how to develop a facebook app with the help of Spring-SocialFri, 29 Jan 2016 09:18:33 GMTkai@juplo.de (Kai Moritz)https://juplo.de/develop-a-facebook-app-with-spring-social-part-06-sign-in-users-through-the-canvas-page/https://juplo.de/develop-a-facebook-app-with-spring-social-part-06-sign-in-users-through-the-canvas-page/In this series of Mini-How-Tow's I will describe how to develop a facebook app with the help of Spring-SocialTue, 26 Jan 2016 16:05:28 GMTkai@juplo.de (Kai Moritz)https://juplo.de/develop-a-facebook-app-with-spring-social-part-05-refactor-the-redirect-logic/https://juplo.de/develop-a-facebook-app-with-spring-social-part-05-refactor-the-redirect-logic/In this series of Mini-How-Tow's I will describe how to develop a facebook app with the help of Spring-SocialTue, 26 Jan 2016 14:34:23 GMTkai@juplo.de (Kai Moritz)https://juplo.de/develop-a-facebook-app-with-spring-social-part-04-signing-in-users/https://juplo.de/develop-a-facebook-app-with-spring-social-part-04-signing-in-users/In this series of Mini-How-Tow's I will describe how to develop a facebook app with the help of Spring-SocialMon, 25 Jan 2016 17:59:59 GMTkai@juplo.de (Kai Moritz)https://juplo.de/develop-a-facebook-app-with-spring-social-part-03-implementing-a-user-id-source/https://juplo.de/develop-a-facebook-app-with-spring-social-part-03-implementing-a-user-id-source/In this series of Mini-How-Tow's I will describe how to develop a facebook app with the help of Spring-SocialMon, 25 Jan 2016 13:43:26 GMTkai@juplo.de (Kai Moritz)https://juplo.de/develop-a-facebook-app-with-spring-social-part-02-how-spring-social-works/https://juplo.de/develop-a-facebook-app-with-spring-social-part-02-how-spring-social-works/In this series of Mini-How-Tow's I will describe how to develop a facebook app with the help of Spring-Social.Fri, 22 Jan 2016 23:10:04 GMTkai@juplo.de (Kai Moritz)https://juplo.de/develop-a-facebook-app-with-spring-social-part-01-behind-the-scenes/https://juplo.de/develop-a-facebook-app-with-spring-social-part-01-behind-the-scenes/In this series of Mini-How-Tow's I will describe how to develop a facebook app with the help of Spring-Social.Fri, 22 Jan 2016 16:19:12 GMTkai@juplo.de (Kai Moritz)https://juplo.de/develop-a-facebook-app-with-spring-social-part-00/https://juplo.de/develop-a-facebook-app-with-spring-social-part-00/In this series of Mini-How-Tow's I will describe how to develop a facebook app with the help of Spring-Social.Fri, 22 Jan 2016 15:00:00 GMTkai@juplo.de (Kai Moritz)https://juplo.de/how-to-keep-the-time-zone-when-deserializing-a-zoneddatetime-with-jackson/https://juplo.de/how-to-keep-the-time-zone-when-deserializing-a-zoneddatetime-with-jackson/The Problem: Jackson Loses The Time-Zone During Dezerialization Of A ZonedDateTimeThu, 12 Nov 2015 15:12:05 GMTkai@juplo.de (Kai Moritz)https://juplo.de/fix-hot-reload-of-thymeleaf-templates-in-spring-bootrun/https://juplo.de/fix-hot-reload-of-thymeleaf-templates-in-spring-bootrun/The Problem: Hot-Reload Of Thymeleaf-Templates Does Not Work, When The Application Is Run WithMon, 26 Oct 2015 00:00:00 GMTkai@juplo.de (Kai Moritz)https://juplo.de/java-lang-exception-method-xzy-should-have-no-parameters/https://juplo.de/java-lang-exception-method-xzy-should-have-no-parameters/Did you ever stumbled across the following error during developing test-cases with JUnit and JMockit?Sun, 11 Oct 2015 00:00:00 GMTkai@juplo.de (Kai Moritz)https://juplo.de/integrating-a-maven-backend-with-a-nodjsgrunt-fronted-project/https://juplo.de/integrating-a-maven-backend-with-a-nodjsgrunt-fronted-project/Frontend-Development With Nodjs and GruntWed, 26 Aug 2015 11:57:43 GMTkai@juplo.de (Kai Moritz)https://juplo.de/configure-pac4j-for-a-social-login-along-with-a-spring-security-based-form-login/https://juplo.de/configure-pac4j-for-a-social-login-along-with-a-spring-security-based-form-login/The Problem – What will be explainedSun, 28 Jun 2015 00:00:00 GMTkai@juplo.de (Kai Moritz)https://juplo.de/hibernate4-maven-plugin-1-1-0-released/https://juplo.de/hibernate4-maven-plugin-1-1-0-released/Today we released the version 1.1.0 of hibernate4-maven-plugin to Central!Sat, 16 May 2015 14:52:37 GMTkai@juplo.de (Kai Moritz)https://juplo.de/logging-request-and-response-data-from-requets-made-through-resttemplate/https://juplo.de/logging-request-and-response-data-from-requets-made-through-resttemplate/Logging request- and response-data for requests made through Spring's is quite easy, if you know, what to do. But it is rather hard, if you have no clue where to start. Hence, I want to give you some hints in this post.Mon, 09 Feb 2015 10:52:15 GMTkai@juplo.de (Kai Moritz)https://juplo.de/hibernate4-maven-plugin-1-0-5-released/https://juplo.de/hibernate4-maven-plugin-1-0-5-released/Today we released the version 1.0.5 of hibernate4-maven-plugin to Central!Tue, 11 Nov 2014 00:00:00 GMTkai@juplo.de (Kai Moritz)https://juplo.de/running-aspectj-maven-plugin-with-the-current-version-1-8-1-of-aspectj/https://juplo.de/running-aspectj-maven-plugin-with-the-current-version-1-8-1-of-aspectj/Lately, I stumbled over a syntactically valid class, that can not be compiled by the aspectj-maven-plugin, even so it is a valid Java-7.0 class.Fri, 18 Jul 2014 10:36:19 GMTkai@juplo.de (Kai Moritz)https://juplo.de/aspectj-maven-plugin-can-not-compile-valid-java-7-0-code/https://juplo.de/aspectj-maven-plugin-can-not-compile-valid-java-7-0-code/I stumbled over a valid construction, that can not be compiled by the aspectj-maven-plugin:Fri, 18 Jul 2014 10:32:21 GMTkai@juplo.de (Kai Moritz)https://juplo.de/hibernate4-maven-plugin-1-0-4-released/https://juplo.de/hibernate4-maven-plugin-1-0-4-released/We finally did it. Today we released the version 1.0.4 of hibernate4-maven-plugin to Central!Wed, 02 Jul 2014 00:00:00 GMTkai@juplo.de (Kai Moritz)https://juplo.de/changes-in-log4j-properties-are-ignored-when-running-sl4fj-under-tomcat/https://juplo.de/changes-in-log4j-properties-are-ignored-when-running-sl4fj-under-tomcat/Lately, I run into this very subtle bug: my logs were all visible, like intended and configured in (or ), when I fired up my web-application in development-mode under Jetty with . But if I installed the application on the production-server, which uses a Tomcat 7 servlet-container, no special logger-configuration where picked up from my configuratiTue, 03 Jun 2014 09:55:28 GMTkai@juplo.de (Kai Moritz)https://juplo.de/configure-https-for-jetty-maven-plugin-9-0-x/https://juplo.de/configure-https-for-jetty-maven-plugin-9-0-x/If you do not want to know why it does not work and how I fixed it, just jump to the quick fix!Sun, 23 Feb 2014 00:00:00 GMTkai@juplo.de (Kai Moritz)https://juplo.de/hibernate4-maven-plugin-1-0-3-released/https://juplo.de/hibernate4-maven-plugin-1-0-3-released/Today we released the version 1.0.3 of hibernate4-maven-plugin to Central.Fri, 18 Oct 2013 00:00:00 GMTkai@juplo.de (Kai Moritz)https://juplo.de/bidirectional-association-with-elementcollection/https://juplo.de/bidirectional-association-with-elementcollection/Have you ever wondered, how to map a bidirectional association from an entity to the instances of its element-collection? Actually, it is very easy, if you are using hibernate. It is just somehow hard to find in the documentation, if you are searching for it (look for chapter 2.4.3.4 in the Hibernate-Annotationss-Documentation).Thu, 03 Oct 2013 09:11:36 GMTkai@juplo.de (Kai Moritz)https://juplo.de/log-out-from-wrong-account-with-maven-appengine-plugin/https://juplo.de/log-out-from-wrong-account-with-maven-appengine-plugin/Do you work with the maven-appengine-plugin and several google-accounts? If you do, or if you ever were logged in to the wrong google-account while executing , like me yesterday, you surely wondering, how to logout from maven-appengine-plugin.Thu, 03 Oct 2013 00:00:00 GMTkai@juplo.de (Kai Moritz)https://juplo.de/hibernate4-maven-plugin-1-0-2-release/https://juplo.de/hibernate4-maven-plugin-1-0-2-release/Today we released the version 1.0.2 of hibernate4-maven-plugin to Central.Fri, 02 Aug 2013 00:00:00 GMTkai@juplo.de (Kai Moritz)https://juplo.de/hibernate4-maven-plugin-1-0-1-released/https://juplo.de/hibernate4-maven-plugin-1-0-1-released/Today we released the bugfix-version 1.0.1 of hibernate4-maven-plugin to Central.Tue, 15 Jan 2013 23:10:59 GMTkai@juplo.de (Kai Moritz)https://juplo.de/hibernate4-maven-plugin-1-0-released/https://juplo.de/hibernate4-maven-plugin-1-0-released/Yeah! We successfully released our first artifact to Central.Thu, 29 Nov 2012 20:04:25 GMTkai@juplo.de (Kai Moritz)https://juplo.de/hibernate4-maven-plugin-a-simple-plugin-for-generating-a-database-schema-from-hibernate-4-mapping-annotations/https://juplo.de/hibernate4-maven-plugin-a-simple-plugin-for-generating-a-database-schema-from-hibernate-4-mapping-annotations/A simple Plugin for generating a Database-Schema from Hibernate 4 Mapping-AnnotationsWed, 28 Nov 2012 00:00:00 GMTkai@juplo.de (Kai Moritz)