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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 */
class Content_Iterator_i :
public virtual POA_Web_Server::Content_Iterator
{
// = 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::ULongLong file_size);
// Constructor
~Content_Iterator_i (void);
// Destructor
virtual CORBA::Boolean next_chunk (CORBA::ULongLong offset,
Web_Server::Chunk_Type_out chunk);
// This operation returns the next <chunk> of the file starting at
// <offset>. If there are no more bindings, false is returned.
virtual void destroy (void);
// 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::ULongLong file_size_;
// The size of the file being iterated over.
CORBA::ULongLong chunk_index_;
// The number of the current chunk of data being sent. (Used only
// for debugging purposes.)
};
#endif /* CONTENT_ITERATOR_I_H */
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