How to handle Concurrency issue?
I am sending two files.1 file from frontend UI and 1 file from backend.
Suppose File A content is
Hello
I am XYZ
Suppose File B content is
Hello
I am ABC
When i am sending the files at the same time then the both files are getting merged into one like below:
Hello
I am XYZ
Hello
I am ABC
Is there any Solution to handle this Concurrency issue? I have used transaction.
I have the following Script:
BEGIN TRY
BEGIN TRANSACTION
SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
EXEC PROC_FILE_IDENTIFIER @FILE_IDENTIFIER OUT
IF @IS_FL_GN=1
BEGIN
EXEC PROC_FLOW_GEN_CREATE_FILE @REGID,@DATAFLOW,....... ------ File Creation from UI
END
else
BEGIN
EXEC PROC_CREATE_FILE @REGID,@DATAFLOW,......... ------File Creation from backend
END
-- Move the created file into IN folder
SET @RESULTTEXT=@T_HEADER + @T_GROUP + @T_FOOTER
DECLARE @PATH VARCHAR(2000)
DECLARE @TXT VARCHAR(2000)
SET @PATH = 'D:\Symbio_Data_Testing\IN\' + @FILE_IDENTIFIER + '.USR'
COMMIT TRANSACTION
END TRY
BEGIN CATCH
Select ERROR_MESSAGE()
Select ERROR_LINE()
IF @@TRANCOUNT > 0
ROLLBACK TRANSACTION
Exec PROC_CHECK_LAST_FILE_GENERATED
END CATCH
The SP PROC_FILE_IDENTIFIER gives the Filename. This SP contains table: File_number_mst_t which contains file_number which gets updated everytime.
Suppose there is file number 1.
when user create file,it will take the filename as 1(f1) and update the filenumber to 2.
Next time when the user will send file,it will take the filename as 2(f2) and update the file to 3.
Transaction1
1
2 Transaction2
2
3
How can i handle the Concurrency isssue when file Comes at the same time.(Conflict occured). Any Suggestions or ideas will be highly appreciated.
