A common mistake is to set the alternatives just for java sdk. This can lead to issues when several java versions are present. Jasper Reports a well knows Java library used to generate ad-hoc pdf reports compiles the report templates and the temporary classes using the default system javac not the javac of the java… Read More »
Usually Spring Boot beans are created automatically before the application start and autowired as needed. What if we need to create a Spring bean only if some configuration file requires it. This way of writing code is very useful when trying to write highly configurable enterprise applications where you want to be able what components… Read More »
Spring Boot assumes that all the created beans are singletons. That works OK for 90% of the cases when Spring Boot is used but sometimes we need several instances of the same bean type. One example is when our bean is a kind of “interface service” that is reading or writing data to another external… Read More »
The magic command is upower, a command that gives you detailed information about the power devices in your laptop/desktop. Enumerate all the power devices Check the details of a power device (battery in this case)
As I mentioned in a previous post usually there are two channels of sending payments to a Real Time Gross Settlement System: using a VPN network that connects all the participant financial institutions to the RTGS . using a 3rd party network like SWIFT that connects all the participant financial institutions to the RTGS Bellow… Read More »
RabbitMQ is a nice message queue server used in lot of networking monitoring appliances and other services. It has a very small footprint and can be integrated with lots of languages and resources. All works well until you get the famous recovery log corrupted error. Usually the issue is caused by disk full or in… Read More »
Sometimes you get some XLS schemas that are full of additional annotations and comments you want strip. Annotations and comments are nice but annoying when trying to compare two incremental versions of some schema and try to pin point just the differences. Bellow there is a script used to remove all comments and the <xs:annotation>… Read More »
There are several configurations that will prepare the embedded Jboss EAP 7.x Artemis messaging server for a production environment with high volumes. The following is a non exhaustive list of optimizations I discovered during several performance tests. Most of the settings is assumed that are done from jboss-cli. Disable client pre-fetch of messages: This will… Read More »
To enable HSTS in Jboss from jboss-cli.sh command line execute the following: The following curl command can be used to verify the response header is returned correctly:
We all hate that time when we start to have a disk failure. In one of my RAID10 one disk was at some point in the failed status. That should be an immediate concern for you. A 4 disks RAID10 setup can deal with 1 disk failure and even with 2 disk failures if they… Read More »