In unserem Haus steht eine Wärmepumpe des Typs CTA Optiheat 1-11es.
Da wir in der letzten Zeit mit der Temperatur des heissen Trinkwassers nicht zufrieden waren, habe ich mich der Herausforderung gestellt, an Metrikdaten zu kommen.
Tag Spring Boot
Recently I got an new exception when I started a Spring Boot application for development:
Fatal error: java.lang.NullPointerException: Cannot invoke "jdk.internal.platform.CgroupInfo.getMountPoint()" because "anyController" is null
at java.base/jdk.internal.platform.cgroupv2.CgroupV2Subsystem.getInstance(CgroupV2Subsystem.java:80)
at java.base/jdk.internal.platform.CgroupSubsystemFactory.create(CgroupSubsystemFactory.java:114)
at java.base/jdk.internal.platform.CgroupMetrics.getInstance(CgroupMetrics.java:177)
at java.base/jdk.internal.platform.SystemMetrics.instance(SystemMetrics.java:29)
at java.base/jdk.internal.platform.Metrics.systemMetrics(Metrics.java:58)
at java.base/jdk.internal.platform.Container.metrics(Container.java:43)
at jdk.management/com.sun.management.internal.OperatingSystemImpl.<init (OperatingSystemImpl.java:182)
In one of my projects I let Spring Boot automatically bind domain objects from the database.
This fails in the reduced unit test setup, because DomainClassConverter is not available. But it can be mocked!
The Google phone number parser & formatter is very helpful to ensure the same number format for user prodived data. To simplify the use in Spring Boot application with Thymeleaf I created a wrapping TagLib/ExpressionFactory.
When I started to use Spring Boot I had some issues with the validation. The @Validated annotation triggered the validation as requested but the validation terminated with an org.springframework.validation.BindException instead of filling the BindingResult object.
During learning Spring Boot I noticed attributes to methods in Spring Boot controllers can be automatically injected.
To migrate my blog from Grails to Spring Boot I created an implementation to inject the current blog instance based on an session attribute.
Using the asset pipline in Grails, the production CSS and Javascript files have been including with a digest appendix. This feature is not available in Spring Boot, therefore I started to create a simple Thymeleaf tag library.
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