Catch KM Events

Question

Hi all
I have to catch some of the KM resource events - create and delete new resources. I am quite new in this area. I havent written any repository service previously.
I found the following code in forum.
<i>public class MyEventReceiver implements IResourceEventReceiver {
    public MyEventReceiver() {
     IResourceEventBroker broker = resource.getRepositoryManager().getEventBroker();
        broker.register(this, IResourceEvent.RENAME_EVENT, IEventBroker.PRIO_MIN, true);
    public void received(IEvent event) {
     if( event instanceof IResourceEvent ) {
      IResourceEvent resourceEvent = (IResourceEvent)event;
      IResource resource = resourceEvent.getResource();
}</i>
But it doesnt tell which kind of project I should create. Also regarding <b>resource</b> object , I guess its the folder/file on which we need to catch event. But for  that we need IUser object to create Resource Context. So pls tell also how to get it.
If anyone can provide simple complete example, Please do so.
Points will be definitely awarded for helpful answers.

Answer 1

Hi Detlev
I tested following code: I uploaded the PAR in portal.
Under Respository Services I can see the name of the class.
What I wanted was that if some file gets created somewhere , then delete the folder /documents/Test/Certificates.
But its not working. Please guide..
<i>import java.io.File;
import java.util.Collection;
import java.util.Iterator;
// implements IMyNewRepositoryService interface
  Note: IReconfigurable and IResourceEventReceiver interfaces are optional
public class EventCatcher extends AbstractRepositoryService implements IReconfigurable, IResourceEventReceiver {
  private static final String TYPE = "EventCatcher";
  private Collection repositoryManagers;
  public EventCatcher() {
    super();
    // Do not add code here. Add it to startUpImpl() instead
  public String getServiceType() {
    return EventCatcher.TYPE;
  protected void startUpImpl(Collection repositoryManagers) throws ConfigurationException, StartupException {
    // implement this method as follows:
    // - Verify configuration data
    // - Get references to other needed (global) services
    // - Check whether other repository services (this service depends on) are also assigned to the repository managers
    // - Usually the service registers itself for certain events at all repository managers
    try  {
    catch (Exception e) {
      throw new StartupException(e.getMessage(), e);
     this.repositoryManagers = repositoryManagers;
     Iterator it = repositoryManagers.iterator();
     while (it.hasNext()){
          try {
               addRepositoryAssignment((IRepositoryManager) it.next());
               } catch (ServiceNotAvailableException e) { }
  protected void shutDownImpl() { }
  protected void addRepositoryAssignment(IRepositoryManager mgr) throws ServiceNotAvailableException {
    // Implement this method: Usually the service registers itself for certain events at the repository manager.
     try {
          mgr.getEventBroker().register(this, new ResourceEvent(ResourceEvent.CREATE_CHILD, null));
     } catch (WcmException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
  protected void removeRepositoryAssignment(IRepositoryManager mgr) throws WcmException {
    // Implement this method: Usually the service must unregister itself as an event handler.
  public void reconfigure(IConfiguration config) throws ConfigurationException {
    this.stateHandler.preReconfigure();
    // check the new configuration data
    try {
    catch (ConfigurationException ex) {
      this.stateHandler.postReconfigure(ex);
      throw ex;
    this.config = config;
    this.stateHandler.postReconfigure();
  public void received(IEvent event) {
     IResource resource = (IResource)event.getParameter();
     IResourceContext context = resource.getContext();
     RID fileRID = RID.getRID("/documents/Test/Certificates");
     try {
          IResource fileResource = ResourceFactory.getInstance().getResource(fileRID,context);
          fileResource.delete();
     } catch (ResourceException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
}</i>