You can create a workflow's schema in the workflow editor. The workflow schema contains the elements that the workflow runs, and determines the logical flow of the workflow.

Prerequisites

Complete the following tasks.

• Create the Complex Workflow Example.
• Create a Custom Action for the Complex Workflow Example.
• Open the workflow for editing in the workflow editor.

Procedure

1. Click the Schema tab in the workflow editor.
2. Add the following schema elements to the workflow schema.

   Element Type	Element Name	Position in Schema
   Scriptable task	Initializing	Below the Start element
   Decision	VMs to Process?	Below the Initializing scriptable task element
   Scriptable task	Pool Has No VMs	Below the VMs to Process? custom decision element, linked with a red arrow
   Custom decision	Remaining VMs?	Right of the VMs to Process? custom decision element, linked with a green arrow
   Action	getVMDiskModes	Right of the Remaining VMs? custom decision element, linked with a green arrow
   Custom decision	Create Snapshot?	Right of the getVMDiskModes action element, linked with a blue arrow
   Workflow	Create a snapshot	Above the Create Snapshot? custom decision element, linked with a green arrow
   Scriptable task	VM Snapshots	Left of the Create a snapshot workflow, linked with a blue arrow
   Scriptable task	Increment	Left of the VM Snapshots scriptable task element, linked with a blue arrow
   Scriptable task	Set Output	Right of the Pool Has No VMs scriptable task element, linked with a blue arrow

3. Add a Log Exception scriptable task element.
   1. Create an exception handling link from the Create a snapshot workflow to an End element.
   2. Drag a scriptable task element to the red dashed arrow that links the Create a snapshot workflow to an End element.
   3. Double-click the scriptable task element and rename it to Log Exception.
   4. Move the Log Exception scriptable task element to above the VM Snapshots scriptable task element.
4. Unlink all End elements except the End element that is at the right of the Set Output scriptable task element.
5. Link the remaining elements as described in the following table.

   Element	Link to	Type of Arrow	Description
   getVMDiskModes action element	Log Exception scriptable task element	Red dashed	Exception handling
   Create Snapshot? custom decision element	Increment scriptable task element	Red	False result
   Log Exception scriptable task element	Increment scriptable task element	Blue	Normal workflow progression
   Increment scriptable task element	Remaining VMs? custom decision element	Blue	Normal workflow progression
   Remaining VMs? custom decision element	Set Output scriptable task element	Red	False result

6. Click Save at the bottom of the Schema tab.

Results

The following figure shows what the linked elements of the Take a Snapshot of All Virtual Machines in a Resource Pool workflow should look like.

Figure 1. Linking of the Take a Snapshot of All Virtual Machines in a Resource Pool Example Workflow

What to do next

You can optionally define workflow zones by using workflow notes.