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Java library for VMware vSphere
There is a newer version: 6.0.05
/*================================================================================
Copyright (c) 2008 VMware, Inc. All Rights Reserved.

Redistribution and use in source and binary forms, with or without modification, 
are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice, 
this list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright notice, 
this list of conditions and the following disclaimer in the documentation 
and/or other materials provided with the distribution.

* Neither the name of VMware, Inc. nor the names of its contributors may be used
to endorse or promote products derived from this software without specific prior 
written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
IN NO EVENT SHALL VMWARE, INC. OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
POSSIBILITY OF SUCH DAMAGE.
================================================================================*/

package com.vmware.vim.cf;

import java.rmi.RemoteException;
import java.util.Observable;
import java.util.Vector;

import com.vmware.vim25.NotAuthenticated;
import com.vmware.vim25.ObjectSpec;
import com.vmware.vim25.PropertyFilterSpec;
import com.vmware.vim25.PropertyFilterUpdate;
import com.vmware.vim25.PropertySpec;
import com.vmware.vim25.UpdateSet;
import com.vmware.vim25.mo.ManagedObject;
import com.vmware.vim25.mo.PropertyCollector;
import com.vmware.vim25.mo.PropertyFilter;
import org.apache.log4j.Logger;

/**
 * @author Steve JIN ([email protected])
 */

class ManagedObjectWatcher extends Observable implements Runnable {

    /**
     * PropertyCollector
     */
    private PropertyCollector pc;
    /**
     * Vector containing PropertyFilters
     */
    private Vector filters = new Vector();
    /**
     * Version
     */
    private String version = "";
    /**
     * Logger
     */
    private static Logger log = Logger.getLogger(ManagedObjectWatcher.class);

    public ManagedObjectWatcher(PropertyCollector pc) {
        this.pc = pc;
    }

    /**
     *
     * @param mos
     * @param propNames
     */
    public void watch(ManagedObject[] mos, String[] propNames) {
        PropertyFilterSpec pfs = new PropertyFilterSpec();

        ObjectSpec[] oss = new ObjectSpec[mos.length];
        for (int i = 0; i < oss.length; i++) {
            oss[i] = new ObjectSpec();
            oss[i].setObj(mos[i].getMOR());
        }
        pfs.setObjectSet(oss);

        PropertySpec ps = new PropertySpec();
        ps.setType(mos[0].getMOR().getType());
        ps.setPathSet(propNames);
        pfs.setPropSet(new PropertySpec[]{ps});

        watch(pfs);
    }

    /**
     *
     * @param pfs
     */
    public void watch(PropertyFilterSpec pfs) {
        try {
            PropertyFilter pf = pc.createFilter(pfs, true); //report only nesting properties, not enclosing ones.
            filters.add(pf);
        }
        catch (RemoteException re) {
            log.error("RemoteException caught trying to watch on a PropertyFilterSpec", re);
            throw new RuntimeException(re);
        }
    }

    /**
     *
     */
    public void run() {
        while (true) {
            try {
                UpdateSet update = pc.waitForUpdates(version);
                PropertyFilterUpdate[] pfu = update.getFilterSet();
                this.setChanged();
                this.notifyObservers(pfu);
                version = update.getVersion();
            }
            catch (NotAuthenticated na) {
                log.error("NotAuthenticated Exception caught.", na);
                break;
            }
            catch (Exception e) {
                log.error("Generic Exception caught in run block of ManagedObjectWatcher.", e);
            }
        }
    }

    /**
     *
     */
    public void cleanUp() {
        for (PropertyFilter filter : filters) {
            try {
                filter.destroyPropertyFilter();
            }
            catch (RemoteException e) {
                log.error("RemoteException caught in cleanUp", e);
            }
        }
    }
}