mcs/class/referencesource/System.Data/Microsoft/SqlServer/Server/SmiContext.cs

   1 //------------------------------------------------------------------------------
   2 // <copyright file="SmiContext.cs" company="Microsoft">
   3 //     Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 // <owner current="true" primary="true">Microsoft</owner>
   6 // <owner current="true" primary="false">Microsoft</owner>
   7 //------------------------------------------------------------------------------
   8
   9 namespace Microsoft.SqlServer.Server {
  10
  11     using System;
  12     using System.Data;
  13     using System.Data.Sql;
  14     using System.Data.SqlTypes;
  15     using System.Security.Principal;
  16
  17     // NOTE: connection, transaction and context pipe operations could be
  18     //       encapsulated in their own classes, and should if they get complex
  19     //       (transaction is borderline at this point).
  20     internal abstract class SmiContext {
  21
  22         internal abstract event EventHandler OutOfScope;
  23
  24         internal abstract SmiConnection ContextConnection { get; }
  25
  26         internal abstract long ContextTransactionId { get; }
  27
  28         internal abstract System.Transactions.Transaction ContextTransaction { get; }
  29
  30         internal abstract bool HasContextPipe { get; }
  31
  32         internal abstract WindowsIdentity WindowsIdentity { get; }
  33
  34         internal abstract SmiRecordBuffer CreateRecordBuffer (
  35             SmiExtendedMetaData[]   columnMetaData,     // Extended metadata because it requires names, udttypename and xmlschemaname ignored
  36             SmiEventSink            eventSink
  37         );
  38
  39         internal abstract SmiRequestExecutor CreateRequestExecutor (
  40             string                  commandText,
  41             CommandType             commandType,
  42             SmiParameterMetaData[]  parameterMetaData,
  43             SmiEventSink            eventSink
  44         );
  45
  46         //
  47
  48         internal abstract object GetContextValue ( int key );
  49
  50         internal abstract void GetTriggerInfo (
  51             SmiEventSink            eventSink,
  52             out bool[]              columnsUpdated,
  53             out TriggerAction       action,
  54             out SqlXml              eventInstanceData
  55         );
  56
  57         internal abstract void SendMessageToPipe( string message, SmiEventSink eventSink );
  58
  59         internal abstract void SendResultsStartToPipe( SmiRecordBuffer recordBuffer, SmiEventSink eventSink );
  60
  61         internal abstract void SendResultsRowToPipe( SmiRecordBuffer recordBuffer, SmiEventSink eventSink );
  62
  63         internal abstract void SendResultsEndToPipe( SmiRecordBuffer recordBuffer, SmiEventSink eventSink );
  64
  65         internal abstract void SetContextValue ( int key, object value );
  66
  67         // Scratch LOB storage region
  68         internal virtual SmiStream GetScratchStream( SmiEventSink sink ) {
  69             // Adding as of V3
  70
  71             // Implement body with throw because there are only a couple of ways to get to this code:
  72             //  1) Client is calling this method even though the server negotiated for V2- and hasn't implemented V3 yet.
  73             //  2) Server didn't implement V3, but negotiated V3+.
  74             System.Data.Common.ADP.InternalError( System.Data.Common.ADP.InternalErrorCode.UnimplementedSMIMethod );
  75             return null;
  76         }
  77     }
  78 }
  79