How to create and run a workflow from script_124059881

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Gumtree : How to create and run a workflow from script

Created by Tony Lam, last modified on Jul 15, 2009

GumTree Workflow API allows user to create and execute workflow from the scripting support at runtime. Let's assume we have a very simple workflow with single task element. The following Python code will do the trick:

# Creates a new workflow
workflow = WorkflowFactory.createEmptyWorkflow()
# Adds a pause task
pauseTask = PauseTask()
pauseTask.setSleepTime(5)
workflow.addTask(pauseTask)
# Run this workflow
workflow.run()
# Obtains the run results
result = workflow.getRunResults()

This example is equivalent to configuring a workflow with the following workflow XML configuration:

<workflow>
  <task classname="org.gumtree.workflow.ui.tasks.PauseTask=">
    <dataModel class="org.gumtree.workflow.ui.models.SingleNumberDataModel">
      <number class="int">5</number>
     </dataModel>
  </task>
</workflow>

JEPP Only
It is even possible to create dynamic task to script any script in the workflow. See this example:

# Create workflow
from org.gumtree.workflow.ui.util import WorkflowFactory
from au.gov.ansto.bragg.nbi.ui.tasks import ScriptablePythonTask
workflow = WorkflowFactory.createEmptyWorkflow()

# Configure and add a python script task
task = ScriptablePythonTask()
task.setScriptExecutor(__executor__)
task.setFunctionName(execute.func_name)
workflow.addTask(task)

# Execute
workflow.run()
result = workflow.getRunResults()
print result.get(0)

Document generated by Confluence on Apr 01, 2015 00:11

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