Is it possible using the JTA

Hi I am new to JTA and have a question.. Is JTA used only for handling transactions in Database and can it be used for other purposes like rolling back a method or revert a state of an object in the program.
I have a situation where i have to ftp some files then update the database and then move that ftped file from one folder to another. Can i use JTA for this purpose so that failure of one of the methods infact rolls back the entire process and not make any changes in the files and database.
I do understand that i need to write down code to bring back the files from the Remote Server if they have been sent and the program fails in moving the file to target directory.
Any and all suggestions and comments are welcome.
Thanks

Hi,
In JTA you can only rollback work that implements the XAResource interface. If you implement this interface then you can enlist it in a transaction. The XAResource.rollback method should undo your file move, and will be called together with the database's XAResource.rollback by the transaction manager upon Transaction.rollback.
Best,
Guy

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Module1
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Sub testHash()
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d_CycleCount = 50000
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Parent.ChildContainer("TEST_hash").InsertDataToHash CStr(d_Count), "dummy data"
Next
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'According to documentation and debug messages not really required!
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'According to documentation not really as we are leaving scope but just to be consistent.. kill the parent!
Set Parent = Nothing
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Sub testDict()
Dim Parent As parent_class
Dim d_Count As Double
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Dim s_SheetCycleCount As String
s_SheetCycleCount = ThisWorkbook.Worksheets("ButtonSheet").Range("K2").Value
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For d_Count = 0 To d_CycleCount
Parent.ChildContainer("TEST_dict").InsertDataToDict CStr(d_Count), "dummy data"
Next
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Set Parent.ChildContainer("TEST_dict") = Nothing
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Debug.Print "Parent initialized"
Set ChildContainer = CreateObject("Scripting.dictionary")
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If Not ChildContainer.Exists(ChildKey) Then
Dim TmpChild As child_class_hashtable
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Counter = Counter + 1
Set TmpChild = Nothing
End If
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If Not ChildContainer.Exists(ChildKey) Then
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child_class_dict
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Debug.Print "Child using Scripting.Dictionary initialized"
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If Not MemmoryLeakObject.Exists(KeyValue) Then MemmoryLeakObject.Add KeyValue, DataValue
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child_class_hash:
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Debug.Print "Child using System.Collections.Hashtable initialized"
Set MemmoryLeakObject = CreateObject("System.Collections.Hashtable")
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If Not MemmoryLeakObject.ContainsKey(KeyValue) Then MemmoryLeakObject.Add KeyValue, DataValue
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Private Sub Class_Terminate()
Debug.Print "Child using System.Collections.Hashtable terminated"
Set MemmoryLeakObject = Nothing
End Sub
Statistics:
TEST: (Chronologically ordered)
1.1 Excel starting memory: 25.324 kb approximately
Max memory usage after hash (500.000 records) 84.352 kb approximately
Memory released: 0 %
1.2 max memory usages after 2nd consequtive hash usage 81.616 kb approximately
"observation:
- memory is released then reused
- less max memory consumed"
1.3 max memory usages after 3rd consequtive hash usage 80.000 kb approximately
"observation:
- memory is released then reused
- less max memory consumed"
1.4 Running the dictionary procedure after any of the hash runs will start from the already allocated memory
In this case from 80000 kb to 147000 kb
Close excel, free up memory and restart excel
2.1 Excel starting memory: 25.324 kb approximately
Max memory usage after dict (500.000 records) 90.000 kb approximately
Memory released: 91,9%
2.2 Excel starting memory 2nd consequtive dict run: 27.552 kb approximately
Max memory usage after dict (500.000 records) 90.000 kb approximately
Memory released: 99,4%
2.3 Excel starting memory 3rd consequtive dict run: 27.712 kb approximately
Max memory usage after dict (500.000 records) 90.000 kb approximately
Memory released:

Hi Cor,
Thank you for going through my post and took the time to reply :) Most apreciated. The issue I am facing is that the memory is not reallocated when using mixed object types and is not behaving the same. I not understand that .net versus the older methods
use memory allocation differently and perhaps using the .net dictionary object (in stead of the scripting.dictionary) may lead to similar behaviour. {Curious to find that out -> put to the to do list of interesting thingies to explore}
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This leakage drove me to investigate and create the example of this post in the first place. For the solution with the class -> parent class -> child class memory leak I switched all to dictionaries and no leakage occurs anymore but nevertheless thought
it may be good to share / ask if anyone else knows more :D (Never to old to learn something new)

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