[Embedded Tomcat 7] - Redeploy WAR File

[Dark Before Dawn]

Hi there!

I am running tomcat 7.0.14-embed with JavaSE-1.6 on a Windows7 machine. 
/Autodeploy/, /DeployOnStartup/ and /UnpackWARs/ works like a charm when 
creating a new WAR-File at appBase directory for the firsttime. If my 
application generates a updated version of the WAR-File while the Tomcat 
isn't running, the new WAR-File never gets unpacked. This behaviour is 
also described at:

   * 
http://tomcat.apache.org/tomcat-6.0-doc/config/host.html#Automatic%20Application%20Deployment

       /Note: If you re-deploy an updated WAR file while Tomcat is
       stopped, be sure to delete the associated expanded directory
       before restarting Tomcat, so that the updated WAR file will be
       re-expanded when Tomcat restarts./

Is there a workarround to re-deploy a updated WAR-File, while Tomcat is 
offline, without deleting folders manually?

Scenario:
1. my app generates a WAR File with a index.jsp and random image to 
display (basically just a zip file)
2. my app starts tomcat 7 embedded

Current Behavior:
1. if the WAR-File was never deployed before, the WAR-File will be unpacked
2. if the WAR-File was deployed before, the WAR-File will not be 
unpacked and the old version is visible in the webbrowser
    In that case i have to delete the folder manually and restart tomcat.

Wished Behavior:
Everytime the WAR-File is updated it shall be re-deployed by Tomcat.

Code Snippet:

        String tempDir = System.getProperty("java.io.tmpdir");
        String appID = "test";

        RandomWarGenerator rwg = new  RandomWarGenerator(tempDir, appID);
        rwg.export(); // generates WAR-File with index.jsp and random 
image to display

        File webApp = new File(tempDir, appID);

        Tomcat server = new Tomcat();

        server.setBaseDir(tempDir);
        server.setPort(8080);

        StandardHost stdHost = (StandardHost) server.getHost();
        stdHost.setAppBase(tempDir);

        stdHost.setUnpackWARs(true);
        stdHost.setAutoDeploy(true);
        stdHost.setDeployOnStartup(true);

        server.setHost(stdHost);

        server.addWebapp(server.getHost(), "/" + appID , 
webApp.getAbsolutePath());

        server.start();

        server.getServer().await();


Thanks in advance!
Cheers Darky