sdk/samples/all in on code/Visual Studio 2010/CSASPNETReverseAJAX/ClientAdapter.cs

   1 /****************************** Module Header ******************************\
   2 * Module Name:    ClientAdapter.cs
   3 * Project:        CSASPNETReverseAJAX
   4 * Copyright (c) Microsoft Corporation
   5 *
   6 * ClientAdapter class manages multiple client instances. The presentation layer
   7 * calls its methods to easily send and receive messages.
   8 *
   9 * This source is subject to the Microsoft Public License.
  10 * See http://www.microsoft.com/opensource/licenses.mspx#Ms-PL.
  11 * All other rights reserved.
  12 *
  13 \*****************************************************************************/
  14
  15 using System.Collections.Generic;
  16
  17 namespace CSASPNETReverseAJAX
  18 {
  19     /// <summary>
  20     /// This class is used to send events/messages to multiple clients.
  21     /// </summary>
  22     public class ClientAdapter
  23     {
  24         /// <summary>
  25         /// The recipient list.
  26         /// </summary>
  27         private Dictionary<string, Client> recipients = new Dictionary<string,Client>();
  28
  29         /// <summary>
  30         /// Send a message to a particular recipient.
  31         /// </summary>
  32         public void SendMessage(Message message)
  33         {
  34             if (recipients.ContainsKey(message.RecipientName))
  35             {
  36                 Client client = recipients[message.RecipientName];
  37
  38                 client.EnqueueMessage(message);
  39             }
  40         }
  41
  42         /// <summary>
  43         /// Called by a individual recipient to wait and receive a message.
  44         /// </summary>
  45         /// <returns>The message content</returns>
  46         public string GetMessage(string userName)
  47         {
  48             string messageContent = string.Empty;
  49
  50             if (recipients.ContainsKey(userName))
  51             {
  52                 Client client = recipients[userName];
  53
  54                 messageContent = client.DequeueMessage().MessageContent;
  55             }
  56
  57             return messageContent;
  58         }
  59
  60         /// <summary>
  61         /// Join a user to the recipient list.
  62         /// </summary>
  63         public void Join(string userName)
  64         {
  65             recipients[userName] = new Client();
  66         }
  67
  68         /// <summary>
  69         /// Singleton pattern.
  70         /// This pattern will ensure there is only one instance of this class in the system.
  71         /// </summary>
  72         public static ClientAdapter Instance = new ClientAdapter();
  73         private ClientAdapter() { }
  74     }
  75 }