I have a library, which a service can import. Among other things, this library is supposed to run a check if a quarkus-info dependency is installed on the service that is using the library.

How could I understand if a quarkus-info dependency is installed at runtime? One of the ideas I had is to run mvn quarkus:dependency-tree and read through each line if it contains "quarkus-info". Manually in cmd I can do it just fine. However, with Java code that fails -

ProcessBuilder processBuilder = new ProcessBuilder("mvn", "quarkus:dependency-tree");
processBuilder.redirectErrorStream(true);
Process process = processBuilder.start();

results in

Cannot run program "mvn": CreateProcess error=2, The system cannot find the file specified

I have a library, which a service can import. Among other things, this library is supposed to run a check if a quarkus-info dependency is installed on the service that is using the library.

How could I understand if a quarkus-info dependency is installed at runtime? One of the ideas I had is to run mvn quarkus:dependency-tree and read through each line if it contains "quarkus-info". Manually in cmd I can do it just fine. However, with Java code that fails -

ProcessBuilder processBuilder = new ProcessBuilder("mvn", "quarkus:dependency-tree");
processBuilder.redirectErrorStream(true);
Process process = processBuilder.start();

results in

Cannot run program "mvn": CreateProcess error=2, The system cannot find the file specified

• java
• maven
• quarkus

• Just so I understand properly, the service is a Quarkus application, right? And you want your library at runtime to be able to tell you whether the quarkus-info extension is part of the service that included the library, correct? – geoand Commented yesterday
• @geoand Yes, that is correct. Both, the library and the service are written in Quarkus. The library has a method which runs on startUp. The library is imported into the service through pom.xml. Each service uses this library, but not each service uses quarkus-info (import in pom.xml). I want this library to be able to tell if quarkus-info is used by the service or not. – MinisX Commented yesterday
• Great, see my answer – geoand Commented yesterday

1 Answer 1

You need to do something like the following:

public static void hasQuarkusInfo() {
   try {
      Class.forName("io.quarkus.info.BuildInfo", false, Thread.currentThread().getContextClassLoader());
   } catch(ClassNotFoundException ignored) {
      return false;
   }  
}