cachelistener.hxx

vovida的软交换

/* ====================================================================
 * The Vovida Software License, Version 1.0 
 * 
 * Copyright (c) 2000 Vovida Networks, 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:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 
 * 2. 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.
 * 
 * 3. The names "VOCAL", "Vovida Open Communication Application Library",
 *    and "Vovida Open Communication Application Library (VOCAL)" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact [e-mail].
 *
 * 4. Products derived from this software may not be called "VOCAL", nor
 *    may "VOCAL" appear in their name, without prior written
 *    permission of Vovida Networks, Inc.
 * 
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
 * NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL VOVIDA
 * NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
 * IN EXCESS OF $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
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 * ====================================================================
 * 
 * This software consists of voluntary contributions made by Vovida
 * Networks, Inc. and many individuals on behalf of Vovida Networks,
 * Inc.  For more information on Vovida Networks, Inc., please see
 * <http://www.vovida.org/>.
 *
 */
 
/** CacheListener class spawns a new thread which sits listening
 *  to a socket for updates from the database. When an update occurs
 *  it deletes the updated items from the cache and then calls the
 *  client's call back function. The client can then decide whether
 *  to fetch these objects again (therefore re-caching them)
 *  or to do nothing - the objects will be cached next time they are
 *  fetched from the database.
 */ 
 
#ifndef CACHELISTENER_HXX
#define CACHELISTENER_HXX

#include <string>
#include "Sptr.hxx"
#include "VException.hxx"
#include "ThreadIf.hxx"
#include "Tcp_ServerSocket.hxx"
#include "../dataObjects/RecordTypes.h"
#include "CacheStorage.hxx"
#include "UpdateRegInfoRec.hxx"

class Connection;

class CacheListener : public ThreadIf
{
public:
  /// Constructor
  CacheListener(CacheStorage* newMyCache);

  /// Destructor
  ~CacheListener();

  /// Member to process request on the socket
  virtual void thread();

  /// return the port listening on
  int getListenPort();

  /// set the port listening on
  int setListenPort(int newPort);
  
      
  UpdateRegInfoRec* getUpdateRecord() { return updateRecord; };
  void setUpdateRecord(UpdateRegInfoRec* newUpdateRecord) 
  { updateRecord = (UpdateRegInfoRec*)newUpdateRecord->clone(); }
  ;

private:

  CacheStorage* myCache;

  //      string readHttpMessage(ACE_SOCK_Stream& conn);
  
  int openPort() {return openPort(firstPortToCheck);};
  int openPort(int newPort);

  void processRequest(Connection& conn);

  static const int firstPortToCheck = 6000;
  /// Port to listen for messages from the PS
  int _listenerPort;

  UpdateRegInfoRec* updateRecord;

  TcpServerSocket* serverSocket;

};


#endif // CACHELISTENER_HXX