FindShortTempDir

FindShortTempDir.java

package fs;

import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;

public class FindShortTempDir
{
    public static void main(String[] args)
    {
        Path tmpDir = findTempDir("jetty.unixsocket.path");
        System.out.printf("tmpDir[jetty.unixsocket.path] = %s%n", tmpDir);
    }

    private static Path findTempDir(String systemPropertyName)
    {
        String systemPropPath = System.getProperty(systemPropertyName);
        if (systemPropPath != null && !systemPropPath.isBlank())
        {
            Path tmp = Paths.get(systemPropPath);
            if (Files.exists(tmp) && Files.isDirectory(tmp))
                return tmp;
        }

        for (Path rootDir : FileSystems.getDefault().getRootDirectories())
        {
            for (String dirName : List.of("tmp", "var/tmp", "Temp"))
            {
                Path tmp = rootDir.resolve(dirName);
                if (Files.exists(tmp) && Files.isDirectory(tmp))
                    return tmp;
            }
        }

        return Paths.get(System.getProperty("java.io.tmpdir"));
    }
}