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I have to prepare some file transfers within the company. The administrator was talking about mandatory cipher suites aes128-cbc and aes256-cbc. Basically I rely on OpenSSH and don’t dig so deep into the details, but never hurts to check if my running systems comply with above requirements.

If you working with logstash and set the index name dynamically from variables, you might run into situations where the variable is not substituted due to errors. You can get rid of this bad indices by deleting them with the REST API of elasticsearch. The challenge lies in escaping the special characters.

This post describes how to export Dropwizard Metrics to elasticsearch. Instead of using logstash to parse application log files, the metrics can be exported directly within any Java application. This plugin is maintained by elastic.co.

Copy all certificates from one keystore to the keystore of the current Java installation. You can use the keytool and srckeystore (source keystore) and destkeystore (destination keystore).

On the Javaland Conference 2016 I visited an interesting presentation about RESTful Hypermedia APIs by Kai Tödter. A really refreshing and pragmatic view how to benefit from Hypermedia. An additional insight was the Project Lombok.

This post list all essential property names for using HTTP or HTTPS connections in Java.

Working with SSL you can pass all settings as arguments, or do it in the standalone.xml/domain.xml as System Properties. The advantage is you can alter them any time instead passing them as arguments. This post demonstrates how to deal with the essential SSL properties within JBoss by using the CLI.

Folgender Beitrag ist eine Erläuterung von Christian Gohmann: Das Partitioning Feature ist eine kostenpflichtige Zusatzoption für die Enterprise Edition. Um das Feature überhaupt nutzen zu können, muss dies aktiviert werden – entweder direkt bei der Installation der Oracle Software oder später durch den chopt Befehl.

Having problems it comes to debugging of the environment variables and system properties. This snippet prints all known environment variables and system properties in alphabetical order. Makes it easier to compare .