Introduction

JS7 offers a number of strategies for error handling that are explained with the following articles:

Use Case	Workflow					History		Notification	User Intervention
No.	Job Error	Job Warning	Order Stops	Order Continues	Order Finishes	Order Successful	Order Failed		Resume Order	Suspend Order	Cancel Order
1	yes	no	yes	no	no	-	-	yes	yes	yes	yes
2	yes	no	no	yes	no	-	-	yes	no	no	no
3	yes	no	no	no	yes	no	yes	yes	no	no	no
4	yes	no	no	no	yes	yes	no	yes	no	no	no
5	yes	no	no	no	yes	no	yes	yes	no	no	no
6	no	yes	no	yes	no	yes	no	yes	no	no	no

Use Cases

Use Case 1: Job error makes an order stop

In this scenario an order stops subsequently to a job error. The order is put in the failed state. This is the default behavior if no workflow instructions for error handling are used.

The History outcome is not determined: as the order remains in the workflow. The History outcome will be determined from later User Intervention.
Notifications can optionally be sent.
User Interventions include:
- Resume Order: The order will be continued at the same, at a previous or at a later Workflow Instruction
- Suspend Order: The order will be suspended and will be resumed or cancelled later on.
- Cancel Order: The order will be cancelled and the History outcome will indicate the failed order execution.

Example for default error handling

job1
job2
job3

Explanation:

If any of job1, job2 or job3 raises an error then the order stops and is put in the failed state.
User Intervention is required to resume, to suspend or to cancel the order.

Use Case 2: Job error lets an order continue

In this scenario a job error is caught and is handled in a way that lets the order continue.

The History outcome is not determined: as the order continues in the workflow. The History outcome will be determined from later workflow instructions.
Notifications can optionally be sent.
No User Interventions is applied.

Example for catching a job error

Try
    job1
    job2
Catch
Catch-End
job3

Explanation:

if any of job1 or job2 in the Try block raises an error then the empty Catch block lets the order continue.
Leaving the Catch block the order will continue with job3.

Example for catching a job error by use of a recovery job

Try
    job1
    job2
Catch
    job2a
Catch-End
job3

Explanation:

if any of job1 or job2 in the Try block raises an error then the order will enter the Catch block.
In the Catch block job2a is executed.
- If job2a completes successfully then the order will leave the Catch block and will continue with job3.
- If job2a fails then the order will be put in the failed state, will be stopped and will remain in the Catch block to wait for User Intervention
- Consider that Try-Catch instructions can be nested, i.e. in a Catch block another Try-Catch instruction can be used for error handling.

Use Case 3: Job error makes an order finish

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Introduction

Use Cases

Use Case 1: Job error makes an order stop

Use Case 2: Job error lets an order continue

Use Case 3: Job error makes an order finish

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JS7 - How To - Error Handling

Introduction

Use Cases

Use Case 1: Job error makes an order stop

Use Case 2: Job error lets an order continue

Use Case 3: Job error makes an order finish

Resources