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// -*- C++ -*-
// $Id$
// ============================================================================
//
// = LIBRARY
// SMI_ITERATOR
//
// = FILENAME
// Content_Iterator_i.h
//
// = DESCRIPTION
// Header file for the Web_Server::Content_Iterator implementation.
//
// = AUTHOR
// Ossama Othman <ossama@uci.edu>
//
// ============================================================================
#ifndef CONTENT_ITERATOR_I_H
#define CONTENT_ITERATOR_I_H
#include "ace/FILE_Addr.h"
#include "ace/FILE_IO.h"
#include "Web_ServerS.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
// This is to remove "inherits via dominance" warnings from MSVC.
// MSVC is being a little too paranoid.
#if defined(_MSC_VER)
#if (_MSC_VER >= 1200)
#pragma warning(push)
#endif /* _MSC_VER >= 1200 */
#pragma warning(disable:4250)
#endif /* _MSC_VER */
class Content_Iterator_i :
public virtual POA_Web_Server::Content_Iterator,
public virtual PortableServer::RefCountServantBase
{
// = TITLE
// Implement the Web_Server::Content_Iterator interface.
//
// = DESCRIPTION
// This class implements the Iterator pattern to minimize memory
// requirements when retrieving data from a content server.
// Rather than retrieving one large chunk of data, this class
// iterates on the server so that smaller chunks of data are
// retrieved.
friend class Iterator_Factory_i;
public:
Content_Iterator_i (const char *filename, CORBA::ULong file_size);
// Constructor
~Content_Iterator_i (void);
// Destructor
virtual CORBA::Boolean next_chunk (CORBA::ULong offset,
Web_Server::Chunk_Type_out chunk,
CORBA::Environment &ACE_TRY_ENV)
ACE_THROW_SPEC ((CORBA::SystemException));
// This operation returns the next <chunk> of the file starting at
// <offset>. If there are no more bindings, false is returned.
virtual void destroy (CORBA::Environment &ACE_TRY_ENV)
ACE_THROW_SPEC ((CORBA::SystemException));
// Destroy the iterator.
private:
int init (void);
// Initialize the Content_Iterator.
private:
ACE_FILE_Addr file_;
// The Addr representing the requested file.
ACE_FILE_IO file_io_;
// Object that handles all IO operations on the requested file.
CORBA::ULong file_size_;
// The size of the file being iterated over.
CORBA::ULong chunk_index_;
// The number of the current chunk of data being sent. (Used only
// for debugging purposes.)
};
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
#pragma warning(pop)
#endif /* _MSC_VER */
#endif /* CONTENT_ITERATOR_I_H */
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