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WMI Service Query with JACOB

use the JACOB COM bridge to query the WMI interface to determine which services are currently started on a computer

Submitted By: NickDMax

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Views: 2,137

Language: Java

Last Modified: March 24, 2009

Instructions: TO use this you must download and install JACOB form sourceforge.net. Then you must add the jacob.jar and the appropriate DLL file to you classpath.

Snippet

import com.jacob.activeX.ActiveXComponent;
import com.jacob.com.Dispatch;
import com.jacob.com.EnumVariant;
import com.jacob.com.Variant;
/**
* Quick little example of using JACOB (an open source Java-COM bridge) to access
* the windows WMI interface.
* <br>
* To use this snippet you will need to download and install JACOB. This is relatively easy:
* I just uncompressed the zip and put the jacob.jar and the dll into my classpath.
*
* @author NickDMax (at) DreamInCode
*/
public class ListServices {
/**
* List the services currently running on the host computer.
*
* @param args
*/
public static void main(String[] args) {
String host = "localhost"; //Technically you should be able to connect to other hosts, but it takes setup
String connectStr = String.format("winmgmts:\\\\%s\\root\\CIMV2", host);
String query = "SELECT * FROM Win32_Service WHERE started = 1"; //Started = 1 means the service is running.
ActiveXComponent axWMI = new ActiveXComponent(connectStr);
//Execute the query
Variant vCollection = axWMI.invoke("ExecQuery", new Variant(query));
//Our result is a collection, so we need to work though the.
EnumVariant enumVariant = new EnumVariant(vCollection.toDispatch());
Dispatch item = null;
while (enumVariant.hasMoreElements()) {
item = enumVariant.nextElement().toDispatch();
//Dispatch.call returns a Variant which we can convert to a java form.
String serviceName = Dispatch.call(item,"Name").toString();
String servicePath = Dispatch.call(item,"PathName").toString();
int servicePID = Dispatch.call(item,"ProcessId").getInt();
System.out.printf("[%5d] %-25s:\t%s\n",servicePID ,serviceName,servicePath);
}
}
}

Copy & Paste

import com.jacob.activeX.ActiveXComponent;
import com.jacob.com.Dispatch;
import com.jacob.com.EnumVariant;
import com.jacob.com.Variant;

/**
 * Quick little example of using JACOB (an open source Java-COM bridge) to access
 * the windows WMI interface.
 * <br>
 * To use this snippet you will need to download and install JACOB. This is relatively easy:
 * I just uncompressed the zip and put the jacob.jar and the dll into my classpath.
 * 
 * @author NickDMax (at) DreamInCode
 */
public class ListServices {

/**
	 * List the services currently running on the host computer.
	 * 
	 * @param args
	 */
	public static void main(String[] args) {
		String host = "localhost"; //Technically you should be able to connect to other hosts, but it takes setup
		String connectStr = String.format("winmgmts:\\\\%s\\root\\CIMV2", host);
		String query = "SELECT * FROM Win32_Service WHERE started = 1"; //Started = 1 means the service is running.
		ActiveXComponent axWMI = new ActiveXComponent(connectStr); 
		//Execute the query
		Variant vCollection = axWMI.invoke("ExecQuery", new Variant(query));
		
		//Our result is a collection, so we need to work though the.
		EnumVariant enumVariant = new EnumVariant(vCollection.toDispatch());
		Dispatch item = null;
		while (enumVariant.hasMoreElements()) { 
			item = enumVariant.nextElement().toDispatch();
			//Dispatch.call returns a Variant which we can convert to a java form.
			String serviceName = Dispatch.call(item,"Name").toString();
			String servicePath = Dispatch.call(item,"PathName").toString();
			int servicePID = Dispatch.call(item,"ProcessId").getInt();
			System.out.printf("[%5d] %-25s:\t%s\n",servicePID ,serviceName,servicePath);
		} 
	}
	
}