Sure!
The most obvious way is to call Javelin on the cmd-line, from within a Javelin flow.
1. How to do a generic cmd line call:
Use the Invoke Process Activity to call a .bat which calls Javelin on the command line.(Note, executable name is actually executable path here- so it should be the path of the .bat which implements the below.)
2. You call javelin on the command line like this:
JavelinExecutor.exe file=job_file_path.xml
3. Your javelin job file should look like this:
<?xml version="1.0" encoding="utf-8" ?>
<GTJavelinJob>
<FlowPath>Myflowpath</FlowPath>
<VariableFilePath>Myvariablefilepath</VariableFilePath>
<outdir></outdir>
<LogFile></LogFile>
</GTJavelinJob>
4. The variable file is a CSV, you can see it's format below, or 'export variables' from a flow that you have so that you can see the what the format needs to be: