WindowsWmi.java

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package com.sun.enterprise.util.cluster.windows.process;

import com.sun.enterprise.util.cluster.windows.SharedStrings;
import java.io.IOException;
import java.net.UnknownHostException;
import java.util.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.jinterop.dcom.common.IJIUnreferenced;
import org.jinterop.dcom.common.JIException;
import org.jinterop.dcom.common.JISystem;
import org.jinterop.dcom.core.IJIComObject;
import org.jinterop.dcom.core.JIArray;
import org.jinterop.dcom.core.JICallBuilder;
import org.jinterop.dcom.core.JIComServer;
import org.jinterop.dcom.core.JIFlags;
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;
import org.jinterop.dcom.impls.automation.IJIEnumVariant;

/**
 * Windows Management Interface
 * Tests if it's possible to connect to WMI
 * @author bnevins
 */
public class WindowsWmi {
    private IJIDispatch dispatch;
    private JIComServer comStub;
    private IJIComObject unknown;
    private JISession session;
    private IJIComObject comObject;
    private Object[] crazyLongMicrosoftArgs;
    private JIVariant variant;
    private int count = -1;
    private String processInfo[];

    public WindowsWmi(WindowsCredentials bonafides) throws WindowsException {
        try {
            JISystem.getLogger().setLevel(Level.INFO);
            JISystem.setInBuiltLogHandler(false);
            JISystem.setAutoRegisteration(true);

            crazyLongMicrosoftArgs = new Object[]{
                new JIString(bonafides.getHost()),
                JIVariant.OPTIONAL_PARAM(),
                JIVariant.OPTIONAL_PARAM(),
                JIVariant.OPTIONAL_PARAM(),
                JIVariant.OPTIONAL_PARAM(),
                JIVariant.OPTIONAL_PARAM(),
                Integer.valueOf(0),
                JIVariant.OPTIONAL_PARAM()};

            session = JISession.createSession(bonafides.getDomain(),
                    bonafides.getUser(), bonafides.getPassword());
            session.useSessionSecurity(true);
            session.setGlobalSocketTimeout(5000);
            comStub = new JIComServer(JIProgId.valueOf("WbemScripting.SWbemLocator"),
                    bonafides.getHost(), session);

            unknown = comStub.createInstance();

            //ISWbemLocator
            comObject = (IJIComObject) unknown.queryInterface("76A6415B-CB41-11d1-8B02-00600806D9B6");
            //This will obtain the dispatch interface
            dispatch = (IJIDispatch) JIObjectFactory.narrowObject(comObject.queryInterface(IJIDispatch.IID));
            setCount();
            setInfo();
            killme();
        }
        catch (NoClassDefFoundError err) {
            throw new WindowsException(SharedStrings.get("missing_jinterop"));
        }
        catch (Exception e) {
            dispatch = null;
            count = -1;
        }

        if (!initialized())
            throw new WindowsException(Strings.get("WMI.init.error"));
    }

    public final int getCount() throws WindowsException {
        return count;
    }

    public final String[] getInfo() throws WindowsException {
        return processInfo;
    }

    private void setCount() throws WindowsException {
        try {
            JIVariant[] results = dispatch.callMethodA("ConnectServer", crazyLongMicrosoftArgs);
            IJIDispatch wbemServices_dispatch = (IJIDispatch) JIObjectFactory.narrowObject((results[0]).getObjectAsComObject());
            JIVariant[] results2 = wbemServices_dispatch.callMethodA("InstancesOf", new Object[]{new JIString("Win32_Process"), Integer.valueOf(0), JIVariant.OPTIONAL_PARAM()});
            IJIDispatch wbemObjectSet_dispatch = (IJIDispatch) JIObjectFactory.narrowObject((results2[0]).getObjectAsComObject());
            variant = wbemObjectSet_dispatch.get("_NewEnum");
            JIVariant Count = wbemObjectSet_dispatch.get("Count");
            count = Count.getObjectAsInt();
        }
        catch (Exception e) {
            throw new WindowsException(e);
        }
    }

    /**
     * not strictly necessary but it was so difficult to write the code that I can't
     * bear to throw it away!
     * @throws WindowsException
     */
    private void setInfo() throws WindowsException {
        try {
            processInfo = new String[count];
            IJIComObject comObj = variant.getObjectAsComObject();

            // todo is this needed?
            comObj.registerUnreferencedHandler(new IJIUnreferenced() {
                public void unReferenced() {
                }
            });

            IJIEnumVariant enumVARIANT =
                    (IJIEnumVariant) JIObjectFactory.narrowObject(comObj.queryInterface(IJIEnumVariant.IID));

            for (int i = 0; i < count; i++) {
                Object[] values = enumVARIANT.next(1);
                JIArray array = (JIArray) values[0];
                Object[] arrayObj = (Object[]) array.getArrayInstance();
                for (int j = 0; j < arrayObj.length; j++) {
                    IJIDispatch wbemObject_dispatch = (IJIDispatch) JIObjectFactory.narrowObject(((JIVariant) arrayObj[j]).getObjectAsComObject());
                    JIVariant variant2 = (JIVariant) (wbemObject_dispatch.callMethodA("GetObjectText_", new Object[]{Integer.valueOf(1)}))[0];

                    // normally arrayObj.length is 1
                    if (j == 0)
                        processInfo[i] = variant2.getObjectAsString().getString();
                }
            }
        }
        catch (Exception e) {
            throw new WindowsException(e);
        }
    }

    private void killme() throws JIException {
        JISession.destroySession(session);
    }

    private boolean initialized() {
        return dispatch != null;
    }
}