linux-packaging-mono/mcs/class/Novell.Directory.Ldap/Novell.Directory.Ldap.Events.Edir/EdirEventSource.cs

/******************************************************************************
* The MIT License
* Copyright (c) 2003 Novell Inc.  www.novell.com
* 
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//
// Novell.Directory.Ldap.Events.Edir.EdirEventSource.cs
//
// Author:
//   Anil Bhatia (banil@novell.com)
//
// (C) 2003 Novell, Inc (http://www.novell.com)
//


using System;

namespace Novell.Directory.Ldap.Events.Edir
{
  /// <summary> 
  /// This is the source class for Edir events.
  /// </summary>
  public class EdirEventSource : LdapEventSource
  {
    protected EdirEventHandler edir_event;

    /// <summary>
    /// Caller has to register with this event in order to be notified of
    /// corresponding Edir events.
    /// </summary>
    public event EdirEventHandler EdirEvent
    {
      add
      {
	edir_event += value;
	ListenerAdded();
      }
      remove
      {
	edir_event -= value;
	ListenerRemoved();
      }
    }

    /// <summary> 
    /// EdirEventHandler is the delegate definition for EdirEvent.
    /// The client (listener) has to register using this delegate in order to
    /// get corresponding Edir events.
    /// </summary>
    public delegate
    void EdirEventHandler(object source,
			  EdirEventArgs objEdirEventArgs);

    protected override int GetListeners()
    {
      int nListeners = 0;
      if (null != edir_event)
	nListeners = edir_event.GetInvocationList().Length;

      return nListeners;
    }

    protected LdapConnection mConnection;
    protected MonitorEventRequest mRequestOperation = null;
    protected LdapResponseQueue mQueue = null;

    public EdirEventSource(EdirEventSpecifier[] specifier, LdapConnection conn)
    {
      if ((null == specifier) || (null == conn))
	throw new ArgumentException("Null argument specified");

      mRequestOperation = new MonitorEventRequest(specifier);
      mConnection = conn;
    }

    protected override void StartSearchAndPolling()
    {
      mQueue = mConnection.ExtendedOperation(mRequestOperation, null, null);
      int[] ids = mQueue.MessageIDs;

      if (ids.Length != 1)
      {
	throw new LdapException(
				null,
				LdapException.LOCAL_ERROR,
				"Unable to Obtain Message Id"
				);
      }

      StartEventPolling(mQueue, mConnection, ids[0]);
    }

    protected override void StopSearchAndPolling()
    {
      mConnection.Abandon(mQueue);
      StopEventPolling();
    }

    protected override bool NotifyEventListeners(LdapMessage sourceMessage,
			       EventClassifiers aClassification,
			       int nType)
    {
      bool bListenersNotified = false;
      if (null != edir_event)
      {
	if (null != sourceMessage)
	{
	  if ((sourceMessage.Type == LdapMessage.INTERMEDIATE_RESPONSE) &&
	      (sourceMessage is EdirEventIntermediateResponse))
	  {
	    edir_event(this,
		       new EdirEventArgs(sourceMessage,
					 EventClassifiers.CLASSIFICATION_EDIR_EVENT));
	    bListenersNotified = true;
	  }
	}
      }

      return bListenersNotified;
    }
  }
}