Tomcat Server Running Status

[Vadivel Murugesan]

Hi..,

I want to get Application(Apache Server, MySQL Server...etc) Running Process Status using java(Any API).

I can use Runtime.exec("tasklist") to get Running Process Informations.
For tomcat Server the process name would be tomcat5.exe.
So i can easily match the string with running process to get application is running or not
But if i load tomcat server in Eclipse means the process name might javaw.exe in Tasklist.

So i can not use Runtime.exec("tasklist") for this case.

So Anybody can help me to solve this issue?

Thanks in Advance Dude..
--------------------

Levi
SCJP 1.4

[William Brogden]

You can talk directly to the Tomcat Manager application using simple GET urls and parsing the returned text.

See the manager-howto.html and html-manager-howto.html files in a typical tomcat docs installation. Manager does not come with the standard Tomcat install, you have to add it separately.

Bill.

[Vadivel Murugesan]

Thanks for Reply

yep you are right!!! i can get running status of Apache Tomcat Server By
conf/server.xml

But my problem is, i need to find status of any server(DB server, Appl Server or Web Servers ) which would given by User

By your reply, i have coded to find status of Tomcat by using server.xml, but it makes application dependency.. i need to develop application independent tool..

Could you help me for this case.

// Find Tomcat Server Running Status using Sockets and server.xmlimport 
 
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.xml.sax.SAXException;
 

public class CatalinaStatus
{
  /**
   * Pathname to the server configuration file.
   */
  protected static String configFile = "conf/server.xml";
  protected static String serverShutdown;
  protected static int serverPort;
 
  /**
   * The application main program.
   *
   * @param args Command line arguments
   */
  public static void main (String args[])
  {
    Document configDom = getXmlDom (configFile ());
    parseDocument (configDom);
    // System.out.println ("Catalina.serverPort: " + serverPort);
    // System.out.println ("Catalina.serverShutdown: " + serverShutdown);
 
    // Stop the existing server
    try
    {
      Socket localSocket = new Socket ("127.0.0.1",serverPort );
      System.err.println ("Server status:  UP");
      if ((args.length > 0) && (args[0].equalsIgnoreCase ("shutdown")))
      {
        System.out.println ("Tomcat shutdown initiated" );
        doShutdown (localSocket);
      }
 
      localSocket.close ();
    }
    catch (IOException e)
    {
      System.err.println ("Server status:  DOWN");
      System.exit(1);
    }
  }
 
  /**
   * Return a File object representing our configuration file.
   */
  protected static File configFile ()
  {
    File confFile = new File (configFile);
    if (!confFile.isAbsolute())
    confFile = new File (System.getProperty ("catalina.base"), configFile);
 
    return (confFile);
  }
 
  /**
   * Parses an XML file and returns a DOM document.
   */
  public static Document getXmlDom (File fileName)
  {
    try
    {
      // Create a builder factory
      DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance ();
 
      // Create the builder and parse the file
      Document doc = factory.newDocumentBuilder ().parse (fileName);
      return doc;
    }
    catch (SAXException e)
    {
      // A parsing error occurred; the xml input is not valid
      e.printStackTrace ();
    }
    catch (ParserConfigurationException e)
    {
      e.printStackTrace ();
    }
    catch (IOException e)
    {
      e.printStackTrace ();
    }
    return null;
  }
 
  /**
   * Extract the server port & shutdown command from the DOM
   */
  private static void parseDocument (Document configDom)
  {
    //get the root element which is Server Eg: <Server port="8005" shutdown="SHUTDOWN">
 
    Element docEle = configDom.getDocumentElement ();
    serverPort = new Integer (docEle.getAttribute ("port")).intValue ();
    serverShutdown = docEle.getAttribute ("shutdown");
  }
 
  /**
   * Send the shutdown command to the server
   */
  private static void doShutdown (Socket localSocket)
  {
    try
    {
      OutputStream outStream = localSocket.getOutputStream ();
 
      for (int i = 0; i < serverShutdown.length (); i++)
        outStream.write (serverShutdown.charAt (i));
      outStream.flush ();
      outStream.close ();
    }
    catch (IOException e)
    {
      System.out.println ("ERROR: I/O Exception during server shutdown.");
      e.printStackTrace ();
    }
  }
}