webservices/wsframework/inc/msentransport.h
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     1 /*
       
     2 * Copyright (c) 2002-2005 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:    Header declaration
       
    15 *
       
    16 */
       
    17 
       
    18 
       
    19 
       
    20 
       
    21 
       
    22 
       
    23 
       
    24 
       
    25 #ifndef M_SEN_TRANSPORT_H
       
    26 #define M_SEN_TRANSPORT_H
       
    27 
       
    28 // INCLUDES
       
    29 #include <e32std.h>
       
    30 
       
    31 #include "msenservicesession.h"
       
    32 #include "msenremoteserviceconsumer.h"
       
    33 #include "msenlayeredproperties.h"
       
    34 
       
    35 #include "MSenElement.h"
       
    36 
       
    37 // CONSTANTS
       
    38 const TInt KErrSenTransactionComplete = 20;
       
    39 
       
    40 // FORWARD DECLARATIONS
       
    41 class CSenFragment;
       
    42 class CSenTransportProperties;
       
    43 
       
    44 // DATA TYPES
       
    45 typedef RPointerArray<CSenFragment> RTransportProperties;
       
    46 
       
    47 // CLASS DECLARATION
       
    48 class MSenTransport
       
    49     {
       
    50     public:
       
    51     
       
    52         // New functions
       
    53         
       
    54         /**
       
    55         * Method for sending synchronous  request to a known endpoint (URI). This method
       
    56         * will block the current ActiveScheduler until the response from service is received.
       
    57         *
       
    58         * @param aEndpoint is the endpoint, typically an URI of the service being invoked
       
    59         * @param aMessage is the actual message to the service behind known endpoint
       
    60         * @param aTransportProperties containts the transport related request properties
       
    61         * @param aResponse will contain the response after this synchronous call returns.
       
    62         * @param aConsumer is the underlying caller invoking this request.
       
    63         * @return KErrSenNoEndpoint if aEndpoint lenght is zero or negative.
       
    64         */
       
    65         virtual TInt SubmitL(const TDesC8& aEndpoint,
       
    66                              const TDesC8& aMessage,
       
    67                              const TDesC8& aTransportProperties,
       
    68                              HBufC8*& aResponse,
       
    69                              MSenRemoteServiceConsumer& aConsumer) = 0;  
       
    70     
       
    71         /**
       
    72         * Method for sending asynchronous request to a known endpoint (URI).
       
    73         * @param aEndpoint is the endpoint, typically an URI of the service being invoked
       
    74         * @param aMessage is the actual message to the service behind known endpoint
       
    75         * @param aTransportProperties containts the transport related request properties
       
    76         * @param aReplyTo is the session session performing this request for the caller 
       
    77         * @param aConsumer is the underlying caller invoking this request (addressee)
       
    78         * @param aTxnId will be set to refer to the new transaction id of this request
       
    79         * @return KErrNone or some error, if the method fails. Error code can be either some
       
    80         * system-wide constnat, or a WSF specific KErrSenNoEndpoint if aEndpoint lenght is zero
       
    81         * or negative.
       
    82         */
       
    83         virtual TInt SendL(const TDesC8& aEndpoint,
       
    84                            const TDesC8& aMessage,
       
    85                            const TDesC8& aTransportProperties,
       
    86                            MSenServiceSession& aReplyTo,
       
    87                            MSenRemoteServiceConsumer& aConsumer,
       
    88                            TInt& aTxnId) = 0;
       
    89 
       
    90         /**
       
    91         * Method parses and applies the given properties on top of current properties 
       
    92         * (state) of the transport. This means, that all spesified property entries 
       
    93         * override existing ones 
       
    94         */
       
    95         virtual TInt SetPropertiesL(const TDesC8& aProperties,
       
    96                                     MSenLayeredProperties::TSenPropertiesLayer aTargetLayer,
       
    97                                     MSenRemoteServiceConsumer* aConsumer) = 0;
       
    98         
       
    99         virtual TInt PropertiesL(HBufC8*& aProperties) = 0;
       
   100 
       
   101         /**
       
   102         * Cancels the transaction from the transport, removing interested pending
       
   103         * consumers from list of response receivers, preventing any callbacks
       
   104         * being performed even though transport itself may still receive response
       
   105         * from some (network stack) server.
       
   106         * @return KErrNone, if cancel was performed
       
   107         *         KErrNotFound if transaction was not found 
       
   108         */
       
   109         virtual TInt CancelTransaction(const TInt aTxnId) = 0;
       
   110 
       
   111         /**
       
   112         * Method requests the transport plug-in implementation to complete
       
   113         * a pending transaction. Typically, service provider sessions
       
   114         * (like MSenRemoteHostlet) implementations call this method to
       
   115         * signalize, that certain pending, asynchronous transaction
       
   116         * issued earlier by some consumer has been completed.
       
   117         * @param aTxnId is the id of the transaction to be completed
       
   118         * @param aStatus is an optional, additinal status code, which
       
   119         * transport plug-in should pass to the "addressee", the consumer,
       
   120         * who originated this transaction.
       
   121         * @return KErrNone if transaction was completed successfully
       
   122         *         KErrNotFound if pending transaction, matching with
       
   123         *         given aTxnId was not found.
       
   124         */
       
   125         virtual TInt CompleteTransaction(const TInt aTxnId,
       
   126                                          const TInt aStatus = KErrNone) = 0;
       
   127 
       
   128         /**
       
   129         * Getter for the URI scheme of this transport plug-in implementation,
       
   130         * Examples of such scheme are: http, tcp, udp and local.
       
   131         * @return the scheme of this transport
       
   132         */
       
   133         virtual TPtrC8 UriSchemeL() = 0;
       
   134         
       
   135         
       
   136         
       
   137         virtual MSenProperties& PropertiesL() = 0;
       
   138     
       
   139         inline virtual TInt SubscribeEventListenerL(MSenRemoteServiceConsumer& /*aConsumer*/) 
       
   140             {
       
   141             return KErrNotSupported;
       
   142             }
       
   143         inline virtual TInt UnsubscribeEventListenerL(MSenRemoteServiceConsumer& /*aConsumer*/)
       
   144             {
       
   145             return KErrNotSupported;
       
   146             }
       
   147     };
       
   148 
       
   149 #endif // SEN_MTRANSPORT_H
       
   150 
       
   151 // End of File