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May 20, 2011
May 18, 2011
I want to tell you about an underused tool in the K2 Blackmarket community arsenal: The Process Instance Version Migrator.
This tool allows you to make inflight migrations of process instances between process versions.
It uses an API called LIM - Live Instance Management. This API /is/ a K2 Supported API however the tool itself is community supported.
Credits for this tool go to Neil Maartens – A K2 Consultant now working in the US. K2 Underground username: NeilM
So – on with the tool. Download it from here: http://www.k2underground.com/groups/process_version_migration_utility/default.aspx
Extract the tool – full source code is included however you'll want to navigate to the folder: ProcessInstanceVersionMigrator\ProcessInstanceVersionMigrator\bin\Debug
Here you'll find a .exe which is to run the program and a .config thatcontains the server connection strings.
FIRST MODIFY THE .config
You'll need to modify the following:
<add key="K2SqlConnString" value="Data Source=localhost;Initial Catalog=k2server;Integrated Security=True;MultipleActiveResultSets=True"/>
<add key="K2ServerName" value="localhost"/>
<add key="K2ServerPort" value="5555"/>
By default the tool will work best if you're running on the (a) K2 Server as the K2 Server Service account.
Next run the tool .exe
Use of the tool should be quite straight forward. When it runs you are presented with a window that describes 7 steps – each with a button associated.
Step 1 – Check the config file!
Step 2 – Click "Get list of processes" – this populates a drop down list with the process types on the specified server, select the process type you with you migrate.
Step 3 – Click on "Get Active Instances" – this will fill the table with a list of running instances of the selected process type, including the status and version of the instances.
Step 4 – Select each instance you wish to migrate – processes in error state can be migrated also.
Step 5 – Click on "Get process versions" – this will load a list of versions for the selected process type – then select which verson you wish to migrate the above instances to.
Step 6 – Click on "Get process version activites" – this loads a list of activites in the selected version that you can then select. The tool will then perform a goto to the selected activity after migration. You can also choose not to redirect at all, or redirect to the current activity if you want to rexecute the current step (useful if the instance is in error and you want to restarted from the failed point).
Step 7 – Perform the migration! This is the final step and the act can not be un-done. By now you should have thoroughly tested the migration scenario in you test environments.
The table will show Migrating, followed by Migrated for each selected process instance.
P.S: Some other things to know.
- There are only certain things you can chance and expect migration to work
- See product documentation: Designers > K2 Designer for Visual Studio > Live Instance Management > LIM – Sourcecode.Workflow.Management > Important Notes
- I have tested this tool myself on version from late 0807 (release of API) to 4.5 1320 (Latest at time or writing)
- You can migrated backwards or forwards
- <todo… suggestions welcome>
The K2 Pirate