internetradio2.0/irnetworkcontroller/inc/irdatatransferobserver.h
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     1 /*
       
     2 * Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). 
       
     3 * All rights reserved.
       
     4 * This component and the accompanying materials are made available
       
     5 * under the terms of "Eclipse Public License v1.0"
       
     6 * which accompanies this distribution, and is available
       
     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".
       
     8 *
       
     9 * Initial Contributors:
       
    10 * Nokia Corporation - initial contribution.
       
    11 *
       
    12 * Contributors:
       
    13 *
       
    14 * Description:  Data transfer interfaces.
       
    15 *
       
    16 */
       
    17 
       
    18 
       
    19 #ifndef M_IRDATATRANSFEROBSERVER_H
       
    20 #define M_IRDATATRANSFEROBSERVER_H
       
    21 
       
    22 #include <e32def.h>
       
    23 
       
    24 class RHTTPSession;
       
    25 class MIRDataTransferObserver;
       
    26 
       
    27 
       
    28 /**
       
    29  * Data transfer tracker interface.
       
    30  *
       
    31  * Provides means to attach itself to an existing network session to track the data amounts
       
    32  * transferred through it, and also an API through which raw data amounts can be manually
       
    33  * inputted (this is mainy the case when raw sockets are used directly).
       
    34  *
       
    35  * For getting notifications from the application's data transfer amounts on the core side,
       
    36  * this class supports an observer interface through which data transfer events are notified.
       
    37  */
       
    38 NONSHARABLE_CLASS( MIRDataTransferTracker )
       
    39     {
       
    40 public:
       
    41 
       
    42     /**
       
    43      * Supported data transfer categories.
       
    44      */
       
    45     enum TIRTransferCategory
       
    46         {
       
    47 
       
    48         /**
       
    49          * The category for the data is unknown.
       
    50          */
       
    51         EIRTransferCategoryUnknown,
       
    52 
       
    53         /**
       
    54          * The category for the data is SDS.
       
    55          */
       
    56         EIRTransferCategoryIsds,
       
    57 
       
    58         /**
       
    59          * The category for the data is content show.
       
    60          */
       
    61         EIRTransferCategoryAudio
       
    62 
       
    63         };
       
    64 
       
    65     /**
       
    66      * Simple struct to keep hold of all the different data amounts transferred.
       
    67      *
       
    68      * The actual total amount of bytes of transferred data through the connection
       
    69      * is the amount of total bytes sent added to the amount of total bytes received.
       
    70      */
       
    71     NONSHARABLE_STRUCT( TIRDataTransferPckg )
       
    72         {
       
    73 
       
    74         /**
       
    75          * The total amount of bytes sent originating from all traffic.
       
    76          * This is simply the sum of all the categorized data sent amounts.
       
    77          */
       
    78         TInt iBytesSentTotal;
       
    79 
       
    80         /**
       
    81          * The total amount of bytes received originating from all traffic.
       
    82          * This is simply the sum of all the categorized data received amounts.
       
    83          */
       
    84         TInt iBytesReceivedTotal;
       
    85 
       
    86         /**
       
    87          * The total amount of bytes sent originating from unknown traffic.
       
    88          */
       
    89         TInt iBytesSentUnknown;
       
    90 
       
    91         /**
       
    92          * The total amount of bytes received originating from unknown traffic.
       
    93          */
       
    94         TInt iBytesReceivedUnknown;
       
    95 
       
    96         /**
       
    97          * The total amount of bytes sent originating from station directory traffic.
       
    98          */
       
    99         TInt iBytesSentIsds;
       
   100 
       
   101         /**
       
   102          * The total amount of bytes received originating from station directory traffic.
       
   103          */
       
   104         TInt iBytesReceivedIsds;
       
   105 
       
   106         /**
       
   107          * The total amount of bytes sent originating from content show traffic.
       
   108          */
       
   109         TInt iBytesSentAudio;
       
   110 
       
   111         /**
       
   112          * The total amount of bytes received originating from content show traffic.
       
   113          */
       
   114         TInt iBytesReceivedAudio;
       
   115 
       
   116         };
       
   117 
       
   118 public:
       
   119 
       
   120     /**
       
   121      * Sets the observer that is notified of data transfer events.
       
   122      *
       
   123      * @param   aObserver           The observer to set, or NULL if none.
       
   124      */
       
   125     virtual void SetObserver( MIRDataTransferObserver* aObserver ) = 0;
       
   126 
       
   127     /**
       
   128      * Returns the current data transfer amounts.
       
   129      *
       
   130      * This always reflects the current situation, and thereby does not
       
   131      * take the threshold mechanism into account.
       
   132      *
       
   133      * @return  The current data transfer amounts.
       
   134      */
       
   135     virtual const TIRDataTransferPckg& TransferredData() const = 0;
       
   136 
       
   137     /**
       
   138      * Binds the tracker to an existing and opened HTTP session.
       
   139      *
       
   140      * @param   aSession            Session to bind the tracker to.
       
   141      * @param   aCategory           Transfer category to record the data under.
       
   142      */
       
   143     virtual void BindL( RHTTPSession aSession, TIRTransferCategory aCategory ) = 0;
       
   144 
       
   145     /**
       
   146      * Notifies of raw bytes transferred through the connection.
       
   147      *
       
   148      * Raw sockets cannot be observer automatically, so if they are used, then manual
       
   149      * notification is required on the user's part.
       
   150      *
       
   151      * @param   aBytesSent          Bytes sent through the raw socket.
       
   152      * @param   aBytesReceived      Bytes received through the raw socket.
       
   153      * @param   aCategory           Transfer category to record the data under.
       
   154      */
       
   155     virtual void RawDataTransferredL( TInt aBytesSent,
       
   156              TInt aBytesReceived, TIRTransferCategory aCategory ) = 0;
       
   157 
       
   158     };
       
   159 
       
   160 /**
       
   161  * Interface which all data transfer events are passed through.
       
   162  */
       
   163 class MIRDataTransferObserver
       
   164     {
       
   165 
       
   166 public:
       
   167 
       
   168     /**
       
   169      * Invoked when a data transfer event occurs.
       
   170      *
       
   171      * The amount of data supplied as the parameter is the absolute amount of data transferred during
       
   172      * the life time of the connection. The threshold after which the call back is invoked is internal,
       
   173      * resulting in that it may not always be instantly called unless a predefined amount of data has
       
   174      * already been transferred since the last call back was made.
       
   175      *
       
   176      * @param   aData           Data amounts that have been transferred through the connection.
       
   177      */
       
   178     virtual void HandleDataTransferEventL( 
       
   179                 const MIRDataTransferTracker::TIRDataTransferPckg& aData ) = 0;
       
   180     };
       
   181 
       
   182 #endif // M_IRDATATRANSFEROBSERVER_H