I am following Domain Driven Design and Clean/ Hexagonal architecture in my Java microservice. I have domain events declared in my aggregate root class as non-static nested classes. My question is whether these classes should be static nested classes or non-static nested classes(inner classes)? I used non-sta…
java.nio.file.ProviderNotFoundException: Provider “jar” not found when running “mvn test”
When trying to test using “mvn test” the test fail with error: java.nio.file.ProviderNotFoundException: Provider “jar” not found. Compiling the app and running works without issues. It is this piece of code, that for some reason fails, when testing: final FileSystem zipfs = FileSystems…
Callable in ExecutorService with shared data
I have a scenario which I have somehow simulated into the following: I have a list of Callable tasks that are being executed in 4 threads. The execution should return a value(a Map<String, String>). Each task has an item attribute. If for a task I get timeout (I have a Timeout flag in a Map<> that…
Java Maven – CVE-2017-1000487 on plexus-utils-2.0.4.jar plexus-utils-3.0.10.jar
Small question regarding Java and maven please. With a very simple project, reproducible 100%, with just this code snippet (please feel free to copy paste) and running this simple command: (please feel free to run) After feeding this to some static analysis (Black Duck, SonarQube, Dependency-check, etc……
GridBagLayout Adding Space between buttons/stagger/varied columns?
I am trying to create a layout with GridBagLayout but am having trouble getting the spaces in between the JButton controls to be equal. In the first row, there are 5 buttons that have no space in between. The second and third row should have 4 buttons which are smaller which spaces in between. The workaround …
Can’t understand what Javadoc is [closed]
Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 11 months ago. Improve this question I can’t understand what ‘Javadoc’ is. I wanted to know…
How to download a file when a custom header is needed?
I want to download from a private repository in GitHub, so I need to pass the headers Authorization: token ${GITHUB_TOKEN} and Accept: application/vnd.github.v3.raw. For example, with curl: curl -H “Authorization: token ${GITHUB_TOKEN}” -H ‘Accept: application/vnd.github.v3.raw’ -o fil…
Getting error “Missing statement for annotation” by passing the array of annotation into another annotation
Getting error “Missing statement for annotation” by passing the array of annotation into another annotation in java. Code looks like this : The following class in scala I tried the above code and it is giving me the error : “Missing statement for annotation” in the scala class. I want …
How to add dependencies to DEB created by JPackage?
I have a java application that I package with jpackage and receive a debian package. At runtime the application relies on another piece of software being installed, and it comes from another debian package. I want the Ubuntu package manager to automatically resolve this dependency. But that means I have to de…
How to schedule a periodic background work to activate at fixed times?
I want to push a notification every 12 hours at fixed times (lets say for an example, 9am and 9pm, every day). This is my current doWork() code: ` and this is the work creation code: I saw some people doing it with calendar but I don’t understand how it works. Answer I have found a simple solution, usin…