How to run a mvn command from a java program?

Question

I am building a Java program for automating a procedure in my server side. Normally I cd to Desktop/GIT/ and use this maven command "mvn integration-test -DskipTests -P interactive -e".

I am building a java program and I am trying to run that command line but so far I wasn't successful.

So far, here is the code:

public static void main(String[] args) throws FileNotFoundException {
// TODO Auto-generated method stub 

Process theProcess = null;


try
  {
      theProcess = Runtime.getRuntime().exec("mvn integration-test -DskipTests -P interactive -e");
  }
 catch(IOException e)
  {
     System.err.println("Error on exec() method");
     e.printStackTrace();  
  }

// read from the called program's standard output stream
  try
  {
     inStream = new BufferedReader(new InputStreamReader( theProcess.getInputStream()));  
     System.out.println(inStream.readLine());
  }
  catch(IOException e)
  {
     System.err.println("Error on inStream.readLine()");
     e.printStackTrace();  
  }

break;

    }

}

in.close();
}

Answer 1

You should check out maven embedder; which is exactly the tool which you should use in case of embedding maven.

---

OK apparently maven embedder is not supported any more. Probably you can still get it working though, but I rather created a small sample for you which should work. Of course, replace the path for Maven:

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class Q {

public static void main(String[] args) throws IOException, InterruptedException {

    Process p = null;

    try {
        p = Runtime.getRuntime().exec("C:/Applications/apache-maven-3.0.3/bin/mvn.bat integration-test -DskipTests -P interactive -e");
    } catch (IOException e) {
        System.err.println("Error on exec() method");
        e.printStackTrace();
    }

    copy(p.getInputStream(), System.out);
    p.waitFor();

}

static void copy(InputStream in, OutputStream out) throws IOException {
    while (true) {
        int c = in.read();
        if (c == -1)
            break;
        out.write((char) c);
    }
}
}