4.0

Exception Handling
Exception handling catches any errors that occur when a schema element runs. Exception handling defines
how the schema element behaves when the error occurs.
All elements in a workflow, except for decisions and start and end elements, contain a specific output parameter
type that serves only for handling exceptions. If an element encounters an error during its run, it can send an
error signal to an exception handler. Exception handlers catch the error and react according to the errors they
receive. If the exception handlers you define cannot handle a certain error, you can bind an element's exception
output parameter to an Exception element, which ends the workflow run in the failed state.
Exceptions act as a try and catch sequence within a workflow element. If you do not need to handle a given
exception in an element, you do not have to bind that element's exception output parameter.
The output parameter type for exceptions is always an errorCode object.
Create Exception Bindings
Elements can set bindings that define how the workflow behaves if it encounters an error in that element.
Prerequisites
The Schema tab of the workflow editor must contain elements.
Procedure
1 Click the element on which to set the exception binding.
2 Click the connector tool button in the toolbar at the top of the Schema tab or hold down Ctrl and move
the pointer over the right of the element for which to set the exception binding.
A red rectangle appears on the right of the element.
3 Left-click inside the element near the red rectangle, hold down the left mouse button, and move the pointer
to the target element.
A thick dotted red arrow links the two elements. The target element defines the behavior of the workflow
if the element that links to it encounters an error.
4 Click the element that links to the exception handling element.
5 Click the Exceptions tab in the schema element properties tabs at the bottom of the Schema tab.
6 Click the Not set button to set the Output Exception Binding value.
n
Select a parameter to bind to the exception output parameter from the exception attribute binding
dialog box.
n
Click Create parameter/attribute in workflow to create an exception output parameter.
7 Click the target element that defines the exception handling behavior.
8 Click the IN tab in the schema element properties tabs at the bottom of the Schema tab.
9 Right-click in the IN tab and select Bind to workflow parameter/attribute.
10 Select the exception output parameter and click Select.
vCenter Orchestrator Developer's Guide
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