local_locator.h

ACE自适配通信环境（ADAPTIVE Communication Environment）是可以自由使用、开放源码的面向对象（OO）框架（Framework）

// -*- C++ -*-
//
// Local_Locator.h,v 1.8 2004/04/23 03:06:19 ossama Exp

// ============================================================================
//
// = LIBRARY
//    none
//
// = FILENAME
//    Local_Locator.h
//
// = AUTHOR
//    Nanbor Wang
//
// ============================================================================

#ifndef ACE_LOCAL_LOCATOR_H
#define ACE_LOCAL_LOCATOR_H

#include "URL_Locator.h"
#include "ace/Containers.h"

#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */

#include "ID_Generator.h"

class ACE_Svc_Export ACE_URL_Record
  // = TITLE
  //     A URL Record.
  //
  // = DESCRIPTION
  //     A record placed in URL repository.  Notice that
  //     both member pointers are own by URL_Record.
  //     They will get deallocated when the object goes
  //     out of scope.
{
  friend class ACE_URL_Local_Locator;
  friend class ACE_Node<ACE_URL_Record>;
  // We are making ACE_Node as friend class because we don't want
  // others to access default constructor and pushing in an invalid
  // record.  However, container classes need to use default constructor
  // for its head record.
public:
  ACE_URL_Record (ACE_URL_Offer *offer);
  // ctor.

  ~ACE_URL_Record (void);
  // dtor.

  /// Two records are equal if they have the same offer id.
  bool operator== (const ACE_URL_Record &rhs) const;

  /// Unequal, complement of equal.
  bool operator!= (const ACE_URL_Record &rhs) const;


private:
  ACE_URL_Record (void);
  // Default ctor.  This is put here to prevent users from
  // pushing in an invalid record.

  ACE_WString *id_;
  // Offer ID in the repository.

  ACE_URL_Offer *offer_;
  // Offer (and its properties).
};

class ACE_Svc_Export ACE_URL_Local_Locator
  // = TITLE
  //     A simple URL repository to store URL offer locally.
  //
  // = DESCRIPTION
  //     This class manage a collection of URL offers
  //     for local query and registration.  But we should
  //     really use it within a server.
{
  virtual ~ACE_URL_Local_Locator (void);
  // Default destructor.

  virtual int url_query (const ACE_URL_Locator::ACE_Selection_Criteria how,
                         const ACE_URL_Property_Seq *pseq,
                         const size_t how_many,
                         size_t &num_query,
                         ACE_URL_Offer_Seq *offer);
  // Query the locator for HTTP with designate properties (none, some,
  // or all).  The locator being queried will return a sequence of
  // offers with <how_many> offers in it.  This interface allocates
  // <offer> so users must deallocate it after use.

  virtual int export_offer (ACE_URL_Offer *offer,
                            ACE_WString &offer_id);
  // Export an offer to the locator.

  virtual int withdraw_offer (const ACE_WString &offer_id);
  // Withdraw an offer.  return 0 if succeed, -1 otherwise.

  virtual int describe_offer (const ACE_WString &offer_id,
                              ACE_URL_Offer *offer);
  // Query a specific offer.

  virtual int modify_offer (const ACE_WString &offer_id,
                            const ACE_WString *url = 0,
                            const ACE_URL_Property_Seq *del = 0,
                            const ACE_URL_Property_Seq *modify = 0);
  // Modify a previously registered offer.

protected:
  ACE_Unbounded_Set<ACE_URL_Record> repository_;
};

#if defined (__ACE_INLINE__)
#include "Local_Locator.i"
#endif /* __ACE_INLINE__ */

#endif /* ACE_LOCAL_LOCATOR_H */