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Thread: JAVA and WMI

  1. #1
    Junior Member
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    Default JAVA and WMI

    package montest;


    import java.io.IOException;
    import java.util.logging.Level;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import org.jinterop.dcom.common.IJIUnreferenced;
    import org.jinterop.dcom.common.JIException;
    import org.jinterop.dcom.common.JISystem;
    import org.jinterop.dcom.core.JIComServer;
    import org.jinterop.dcom.core.JIProgId;
    import org.jinterop.dcom.core.JISession;
    import org.jinterop.dcom.core.JIString;
    import org.jinterop.dcom.core.JIVariant;
    import org.jinterop.dcom.impls.JIObjectFactory;
    import org.jinterop.dcom.impls.automation.IJIDispatch;
    /**
    *
    * @author Sihle.Ndlovu
    */
    public class MonTest {
    private static final String WMI_DEFAULT_NAMESPACE = "ROOT\\CIMV2";


    private static JISession configAndConnectDCom( String domain, String user, String pass ) throws Exception
    {
    JISystem.getLogger().setLevel( Level.OFF );

    /**try
    {
    JISystem.setInBuiltLogHandler( false );
    }
    catch ( IOException ignored )
    {
    ;
    }
    * */

    JISystem.setAutoRegisteration( true );

    JISession dcomSession = JISession.createSession( domain, user, pass );
    dcomSession.useSessionSecurity( true );
    return dcomSession;
    }


    private static IJIDispatch getWmiLocator( String host, JISession dcomSession ) throws Exception
    {
    JIComServer wbemLocatorComObj = new JIComServer( JIProgId.valueOf( "WbemScripting.SWbemLocator" ), host, dcomSession );
    return (IJIDispatch) JIObjectFactory.narrowObject( wbemLocatorComObj.createInstance().queryInterface( IJIDispatch.IID ) );
    }


    private static IJIDispatch toIDispatch( JIVariant comObjectAsVariant ) throws JIException
    {
    return (IJIDispatch) JIObjectFactory.narrowObject( comObjectAsVariant.getObjectAsComObject() );
    }


    public static void main( String[] args )
    {

    if ( args.length != 4 )
    {
    System.out.println( "Usage: " + EventLogListener.class.getSimpleName() + " domain host username password" );
    return;
    }

    String domain = args[ 0 ];
    String host = args[ 1 ];
    String user = args[ 2 ];
    String pass = args[ 3 ];

    JISession dcomSession = null;

    try
    {
    // Connect to DCOM on the remote system, and create an instance of the WbemScripting.SWbemLocator object to talk to WMI.
    dcomSession = configAndConnectDCom( domain, user, pass );
    IJIDispatch wbemLocator = getWmiLocator( host, dcomSession );

    // Invoke the "ConnectServer" method on the SWbemLocator object via it's IDispatch COM pointer. We will connect to
    // the default ROOT\CIMV2 namespace. This will result in us having a reference to a "SWbemServices" object.
    JIVariant results[] =
    wbemLocator.callMethodA( "ConnectServer", new Object[] { new JIString( host ), new JIString( WMI_DEFAULT_NAMESPACE ),
    JIVariant.OPTIONAL_PARAM(), JIVariant.OPTIONAL_PARAM(), JIVariant.OPTIONAL_PARAM(), JIVariant.OPTIONAL_PARAM(), new Integer( 0 ),
    JIVariant.OPTIONAL_PARAM() } );

    IJIDispatch wbemServices = toIDispatch( results[ 0 ] );

    // Now that we have a SWbemServices DCOM object reference, we prepare a WMI Query Language (WQL) request to be informed whenever a
    // new instance of the "Win32_NTLogEvent" WMI class is created on the remote host. This is submitted to the remote host via the
    // "ExecNotificationQuery" method on SWbemServices. This gives us all events as they come in. Refer to WQL documentation to
    // learn how to restrict the query if you want a narrower focus.
    final String QUERY_FOR_ALL_LOG_EVENTS = "SELECT * FROM __InstanceCreationEvent WHERE TargetInstance ISA 'Win32_NTLogEvent'";
    final int RETURN_IMMEDIATE = 16;
    final int FORWARD_ONLY = 32;

    JIVariant[] eventSourceSet =
    wbemServices.callMethodA( "ExecNotificationQuery", new Object[] { new JIString( QUERY_FOR_ALL_LOG_EVENTS ), new JIString( "WQL" ),
    new JIVariant( new Integer( RETURN_IMMEDIATE + FORWARD_ONLY ) ) } );
    IJIDispatch wbemEventSource = (IJIDispatch) JIObjectFactory.narrowObject( ( eventSourceSet[ 0 ] ).getObjectAsComObject() );

    // The result of the query is a SWbemEventSource object. This object exposes a method that we can call in a loop to retrieve the
    // next Windows Event Log entry whenever it is created. This "NextEvent" operation will block until we are given an event.
    // Note that you can specify timeouts, see the Microsoft documentation for more details.
    while ( true )
    {
    JIVariant eventAsVariant = (JIVariant) ( wbemEventSource.callMethodA( "NextEvent", new Object[] { JIVariant.OPTIONAL_PARAM() } ) )[ 0 ];
    IJIDispatch wbemEvent = toIDispatch( eventAsVariant );

    // WMI gives us events as SWbemObject instances (a base class of any WMI object). We know in our case we asked for a specific object
    // type, so we will go ahead and invoke methods supported by that Win32_NTLogEvent class via the wbemEvent IDispatch pointer.
    // In this case, we simply call the "GetObjectText_" method that returns us the entire object as a CIM formatted string. We could,
    // however, ask the object for its property values via wbemEvent.get("PropertyName"). See the j-interop documentation and examples
    // for how to query COM properties.
    JIVariant objTextAsVariant = (JIVariant) ( wbemEvent.callMethodA( "GetObjectText_", new Object[] { new Integer( 1 ) } ) )[ 0 ];
    String asText = objTextAsVariant.getObjectAsString().getString();
    System.out.println( asText );
    }
    }
    catch ( Exception e )
    {
    e.printStackTrace();
    }
    finally
    {
    if ( null != dcomSession )
    {
    try
    {
    JISession.destroySession( dcomSession );
    }
    catch ( Exception ex )
    {
    ex.printStackTrace();
    }
    }
    }
    }

    }
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