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Current File : C:/Windows/Microsoft.NET/Framework/v4.0.30319/SQL/en/SqlPersistenceService_Logic.sql
��-- Copyright (c) Microsoft Corporation.  All rights reserved.



--

-- PROCEDURE InsertInstanceState

--

if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[InsertInstanceState]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)

drop procedure [dbo].[InsertInstanceState]

GO

Create Procedure [dbo].[InsertInstanceState]

@uidInstanceID uniqueidentifier,

@state image,

@status int,

@unlocked int,

@blocked int,

@info ntext,

@ownerID uniqueidentifier = NULL,

@ownedUntil datetime = NULL,

@nextTimer datetime,

@result int output,

@currentOwnerID uniqueidentifier output

As

    declare @localized_string_InsertInstanceState_Failed_Ownership nvarchar(256)

    set @localized_string_InsertInstanceState_Failed_Ownership = N'Instance ownership conflict'

    set @result = 0

    set @currentOwnerID = @ownerID

    declare @now datetime

    set @now = GETUTCDATE()



    SET TRANSACTION ISOLATION LEVEL READ COMMITTED

    set nocount on



    IF @status=1 OR @status=3

    BEGIN

	DELETE FROM [dbo].[InstanceState] WHERE uidInstanceID=@uidInstanceID AND ((ownerID = @ownerID AND ownedUntil>=@now) OR (ownerID IS NULL AND @ownerID IS NULL ))

	if ( @@ROWCOUNT = 0 )

	begin

		set @currentOwnerID = NULL

    		select  @currentOwnerID=ownerID from [dbo].[InstanceState] Where uidInstanceID = @uidInstanceID

		if ( @currentOwnerID IS NOT NULL )

		begin	-- cannot delete the instance state because of an ownership conflict

			-- RAISERROR(@localized_string_InsertInstanceState_Failed_Ownership, 16, -1)				

			set @result = -2

			return

		end

	end

	else

	BEGIN

		DELETE FROM [dbo].[CompletedScope] WHERE uidInstanceID=@uidInstanceID

	end

    END

    

    ELSE BEGIN



  	    if not exists ( Select 1 from [dbo].[InstanceState] Where uidInstanceID = @uidInstanceID )

		  BEGIN

			  --Insert Operation

			  IF @unlocked = 0

			  begin

			     Insert into [dbo].[InstanceState] 

			     Values(@uidInstanceID,@state,@status,@unlocked,@blocked,@info,@now,@ownerID,@ownedUntil,@nextTimer) 

			  end

			  else

			  begin

			     Insert into [dbo].[InstanceState] 

			     Values(@uidInstanceID,@state,@status,@unlocked,@blocked,@info,@now,null,null,@nextTimer) 

			  end

		  END

		  

		  ELSE BEGIN



				IF @unlocked = 0

				begin

					Update [dbo].[InstanceState]  

					Set state = @state,

						status = @status,

						unlocked = @unlocked,

						blocked = @blocked,

						info = @info,

						modified = @now,

						ownedUntil = @ownedUntil,

						nextTimer = @nextTimer

					Where uidInstanceID = @uidInstanceID AND ((ownerID = @ownerID AND ownedUntil>=@now) OR (ownerID IS NULL AND @ownerID IS NULL ))

					if ( @@ROWCOUNT = 0 )

					BEGIN

						-- RAISERROR(@localized_string_InsertInstanceState_Failed_Ownership, 16, -1)

						select @currentOwnerID=ownerID from [dbo].[InstanceState] Where uidInstanceID = @uidInstanceID  

						set @result = -2

						return

					END

				end

				else

				begin

					Update [dbo].[InstanceState]  

					Set state = @state,

						status = @status,

						unlocked = @unlocked,

						blocked = @blocked,

						info = @info,

						modified = @now,

						ownerID = NULL,

						ownedUntil = NULL,

						nextTimer = @nextTimer

					Where uidInstanceID = @uidInstanceID AND ((ownerID = @ownerID AND ownedUntil>=@now) OR (ownerID IS NULL AND @ownerID IS NULL ))

					if ( @@ROWCOUNT = 0 )

					BEGIN

						-- RAISERROR(@localized_string_InsertInstanceState_Failed_Ownership, 16, -1)

						select @currentOwnerID=ownerID from [dbo].[InstanceState] Where uidInstanceID = @uidInstanceID  

						set @result = -2

						return

					END

				end

				

		  END





    END

		RETURN

Return

Go

GRANT EXECUTE ON [dbo].[InsertInstanceState] TO state_persistence_users

GO





--

-- PROCEDURE RetrieveAllInstanceDescriptions

-- 

if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[RetrieveAllInstanceDescriptions]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)

drop procedure [dbo].[RetrieveAllInstanceDescriptions]

GO

Create Procedure [dbo].[RetrieveAllInstanceDescriptions]

As

	SELECT uidInstanceID, status, blocked, info, nextTimer

	FROM [dbo].[InstanceState]

GO



--

-- PROCEDURE UnlockInstanceState

--

if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[UnlockInstanceState]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)

drop procedure [dbo].[UnlockInstanceState]

GO

Create Procedure [dbo].[UnlockInstanceState]

@uidInstanceID uniqueidentifier,

@ownerID uniqueidentifier = NULL

As



SET TRANSACTION ISOLATION LEVEL READ COMMITTED

set nocount on



		Update [dbo].[InstanceState]  

		Set ownerID = NULL,

		     unlocked = 1,

			ownedUntil = NULL

		Where uidInstanceID = @uidInstanceID AND ((ownerID = @ownerID AND ownedUntil>=GETUTCDATE()) OR (ownerID IS NULL AND @ownerID IS NULL ))

Go

GRANT EXECUTE ON [dbo].[UnlockInstanceState] TO state_persistence_users

GO





--

-- PROCEDURE RetrieveInstanceState

--

if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[RetrieveInstanceState]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)

drop procedure [dbo].[RetrieveInstanceState]

GO

Create Procedure [dbo].[RetrieveInstanceState]

@uidInstanceID uniqueidentifier,

@ownerID uniqueidentifier = NULL,

@ownedUntil datetime = NULL,

@result int output,

@currentOwnerID uniqueidentifier output

As

Begin

    declare @localized_string_RetrieveInstanceState_Failed_Ownership nvarchar(256)

    set @localized_string_RetrieveInstanceState_Failed_Ownership = N'Instance ownership conflict'

    set @result = 0

    set @currentOwnerID = @ownerID



	SET TRANSACTION ISOLATION LEVEL REPEATABLE READ

	BEGIN TRANSACTION

	

    -- Possible workflow status: 0 for executing; 1 for completed; 2 for suspended; 3 for terminated; 4 for invalid



	if @ownerID IS NOT NULL	-- if id is null then just loading readonly state, so ignore the ownership check

	begin

		  Update [dbo].[InstanceState]  

		  set	ownerID = @ownerID,

				ownedUntil = @ownedUntil

		  where uidInstanceID = @uidInstanceID AND (    ownerID = @ownerID 

													 OR ownerID IS NULL 

													 OR ownedUntil<GETUTCDATE()

													)

		  if ( @@ROWCOUNT = 0 )

		  BEGIN

			-- RAISERROR(@localized_string_RetrieveInstanceState_Failed_Ownership, 16, -1)

			select @currentOwnerID=ownerID from [dbo].[InstanceState] Where uidInstanceID = @uidInstanceID 

			if (  @@ROWCOUNT = 0 )

				set @result = -1

			else

				set @result = -2

			GOTO DONE

		  END

	end

	

    Select state from [dbo].[InstanceState]  

    Where uidInstanceID = @uidInstanceID

    

	set @result = @@ROWCOUNT;

    if ( @result = 0 )

	begin

		set @result = -1

		GOTO DONE

	end

	

DONE:

	COMMIT TRANSACTION

	RETURN



End

Go

GRANT EXECUTE ON [dbo].[RetrieveInstanceState] TO state_persistence_users

GO





--

-- PROCEDURE RetrieveNonblockingInstanceStateIds

--

IF EXISTS (SELECT * FROM [dbo].[sysobjects] WHERE id = object_id(N'[dbo].[RetrieveNonblockingInstanceStateIds]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)

DROP PROCEDURE [dbo].[RetrieveNonblockingInstanceStateIds]

GO

CREATE PROCEDURE [dbo].[RetrieveNonblockingInstanceStateIds]

@ownerID uniqueidentifier = NULL,

@ownedUntil datetime = NULL,

@now datetime

AS

    SELECT uidInstanceID FROM [dbo].[InstanceState] WITH (TABLOCK,UPDLOCK,HOLDLOCK)

    WHERE blocked=0 AND status<>1 AND status<>3 AND status<>2 -- not blocked and not completed and not terminated and not suspended

 		AND ( ownerID IS NULL OR ownedUntil<GETUTCDATE() )

    if ( @@ROWCOUNT > 0 )

    BEGIN

        -- lock the table entries that are returned

        Update [dbo].[InstanceState]  

        set ownerID = @ownerID,

	    ownedUntil = @ownedUntil

        WHERE blocked=0 AND status<>1 AND status<>3 AND status<>2

 		AND ( ownerID IS NULL OR ownedUntil<GETUTCDATE() )

	

    END

GO

GRANT EXECUTE ON [dbo].[RetrieveNonblockingInstanceStateIds] TO state_persistence_users

GO



--

-- PROCEDURE RetrieveANonblockingInstanceStateId

--

IF EXISTS (SELECT * FROM [dbo].[sysobjects] WHERE id = object_id(N'[dbo].[RetrieveANonblockingInstanceStateId]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)

DROP PROCEDURE [dbo].[RetrieveANonblockingInstanceStateId]

GO

CREATE PROCEDURE [dbo].[RetrieveANonblockingInstanceStateId]

@ownerID uniqueidentifier = NULL,

@ownedUntil datetime = NULL,

@uidInstanceID uniqueidentifier = NULL output,

@found bit = NULL output

AS

 BEGIN

		--

		-- Guarantee that no one else grabs this record between the select and update

		SET TRANSACTION ISOLATION LEVEL REPEATABLE READ

		BEGIN TRANSACTION



SET ROWCOUNT 1

		SELECT	@uidInstanceID = uidInstanceID

		FROM	[dbo].[InstanceState] WITH (updlock) 

		WHERE	blocked=0 

		AND	status NOT IN ( 1,2,3 )

 		AND	( ownerID IS NULL OR ownedUntil<GETUTCDATE() )

SET ROWCOUNT 0



		IF @uidInstanceID IS NOT NULL

		 BEGIN

			UPDATE	[dbo].[InstanceState]  

			SET		ownerID = @ownerID,

					ownedUntil = @ownedUntil

			WHERE	uidInstanceID = @uidInstanceID



			SET @found = 1

		 END

		ELSE

		 BEGIN

			SET @found = 0

		 END



		COMMIT TRANSACTION

 END

GO

GRANT EXECUTE ON [dbo].[RetrieveANonblockingInstanceStateId] TO state_persistence_users

GO



--

-- PROCEDURE RetrieveExpiredTimerIds

--

IF EXISTS (SELECT * FROM [dbo].[sysobjects] WHERE id = object_id(N'[dbo].[RetrieveExpiredTimerIds]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)

DROP PROCEDURE [dbo].[RetrieveExpiredTimerIds]

GO

CREATE PROCEDURE [dbo].[RetrieveExpiredTimerIds]

@ownerID uniqueidentifier = NULL,

@ownedUntil datetime = NULL,

@now datetime

AS

    SELECT uidInstanceID FROM [dbo].[InstanceState]

    WHERE nextTimer<@now AND status<>1 AND status<>3 AND status<>2 -- not blocked and not completed and not terminated and not suspended

        AND ((unlocked=1 AND ownerID IS NULL) OR ownedUntil<GETUTCDATE() )

GO

GRANT EXECUTE ON [dbo].[RetrieveExpiredTimerIds] TO state_persistence_users

GO



--

-- PROCEDURE InsertCompletedScope

--

IF EXISTS (SELECT * FROM [dbo].[sysobjects] WHERE id = object_id(N'[dbo].[InsertCompletedScope]') AND OBJECTPROPERTY(id, N'IsProcedure') = 1)

DROP PROCEDURE [dbo].[InsertCompletedScope]

GO

CREATE PROCEDURE [dbo].[InsertCompletedScope]

@instanceID uniqueidentifier,

@completedScopeID uniqueidentifier,

@state image

As



SET TRANSACTION ISOLATION LEVEL READ COMMITTED

SET NOCOUNT ON



		UPDATE [dbo].[CompletedScope] WITH(ROWLOCK UPDLOCK) 

		    SET state = @state,

		    modified = GETUTCDATE()

		    WHERE completedScopeID=@completedScopeID 



		IF ( @@ROWCOUNT = 0 )

		BEGIN

			--Insert Operation

			INSERT INTO [dbo].[CompletedScope] WITH(ROWLOCK)

			VALUES(@instanceID, @completedScopeID, @state, GETUTCDATE()) 

		END



		RETURN

RETURN

GO

GRANT EXECUTE ON [dbo].[InsertCompletedScope] TO state_persistence_users

GO





--

-- PROCEDURE DeleteCompletedScope

--

IF EXISTS (SELECT * FROM [dbo].[sysobjects] WHERE id = object_id(N'[dbo].[DeleteCompletedScope]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)

DROP PROCEDURE [dbo].[DeleteCompletedScope]

GO

CREATE PROCEDURE [dbo].[DeleteCompletedScope]

@completedScopeID uniqueidentifier

AS

DELETE FROM [dbo].[CompletedScope] WHERE completedScopeID=@completedScopeID

Go

GRANT EXECUTE ON [dbo].[DeleteCompletedScope] TO state_persistence_users

GO



--

-- PROCEDURE RetrieveCompletedScope

--

IF EXISTS (SELECT * FROM [dbo].[sysobjects] WHERE id = object_id(N'[dbo].[RetrieveCompletedScope]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)

DROP PROCEDURE [dbo].[RetrieveCompletedScope]

GO

CREATE PROCEDURE RetrieveCompletedScope

@completedScopeID uniqueidentifier,

@result int output

AS

BEGIN

    SELECT state FROM [dbo].[CompletedScope] WHERE completedScopeID=@completedScopeID

	set @result = @@ROWCOUNT;

End

GO

GRANT EXECUTE ON [dbo].[RetrieveCompletedScope] TO state_persistence_users

GO





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