#Healthcheck for #golang #microservices

One of the important paradigm change in moving away from monolith application to a cloud of micro-services is how to keep all that interconnected could functioning. A monolith enterprise application usually runs in an application container so a lot of time you are using the container monitoring features to make assumptions about the heath of… Read More »

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#RedHat #JBoss and #Artemis dead-letter queue issue

After migrating from ActiveMq to the embeded JBoss EAP Artemis messaging server ( see link ) I was getting the following error related to the dead message queue (the default queue where messages that failed to be processed end up). 10:21:04,620 WARN [org.wildfly.iiop.openjdk] (ServerService Thread Pool — 7) WFLYIIOP0111: SSL has not been configured but… Read More »

Use #letsencrypt to generate a wildcard domain certificate

I am an old user of letsencrypt that just found out that my old way of renewing my set of certificated is no longer supported. When running the usual “certbot renew” command, that was manually renewing my certificates, resulted in the error: 2019-04-06 17:38:19,072:WARNING:certbot.renewal:Attempting to renew cert (blog.voina.org) from /etc/letsencrypt/renewal/blog.voina.org.conf produced an unexpected error: Client… Read More »

Convert text label files to UTF-8 encoding

In a lot of multi-language enterprise applications where you have to support labels in different languages the text files with the different labels for each language are scattered across your source code. In my case I all the labels are kept in Java property files with “.properties” file extension. Then for each language I have… Read More »

Allow the use of a transacted session in a #Servlet with #JMS broker #Artemis

The open-source application server WildFly from which the RedHat owned JBoss application server is derived is one of the most used Java application server lately. This is caused by the strong market consolidation that is happening that caused the Java application server environment to become very restricted. Basically the only open-source enterprise grade Java application… Read More »