Introduction

The JS7 - Try / Catch Instruction is Fail Instruction can be used for the error handling in a workflow. If any job runs in the try block and failed due to any reason the catch block will execute otherwise it will skip the catch block. If the catch block will also fail then the order will be considered as failed. The folder 04_ErrorHandling contains the example for the try-catch. The four workflows are available with the different use cases for the try-catch:Based on a condition that is checked with an If Instruction, an order is put to the failed state by use of the Fail Instruction. Users can resume the execution of a failed order or can cancel the order.

Workflow

The 04_ErrorHandling folder contains an example of error handling with the Fail Instruction.

The jdFail workflow deliberately fails due to the Fail Instruction that is used in the workflow. The If Instruction used in this workflow includes the expression $return_value_job1 > 0 that implements a check of an order variable. If the value of the order variable evaluates to true then the order has failed. Otherwise the order continues with the job nodes following the If InstructionThe jdFail workflow will execute and fail due to the fail operation is used in the workflow. Even if all the jobs will execute successfully and the fail object is used at the end of the workflow the order will fail and complete the workflow.

To execute the workflow in the folder  04_ErrorHandling folder please follow the steps described below steps:

1. Click on the folder the 04_ErrorHandling  from the and expand any of the workflows. Here I am using folder and expand the jdFail workflow.
   
   
   
   
   
2. To add the an order in to the workflow . Click on click the action menu of the workflow and click on use Add orderOrder button from the drop-down menu.
   
   
   
   
   
3. On clicking the When clicking Add Order. A  a popup window will appear. 
4. You can add the an Order ID or leave the Order Id ID value blank empty, it will take the then use a default Order Id to process the OrderID. Click on the Submit button to add the Order.
   
   
   
   
5. To check the status of the Order order click on the Workflow name with this new Order history panel will appear. name of the workflow. This will make the Order History panel appear.
   
   
   
   
6. From the Order history History panel , you can see the Order is verify that the order has failed. Click on the Order ID to open the detail logs of executionsee log output created by jobs executed for this order.
   
   
   
   
7. A log view window will open and the order log will be displayed. The order This log contains log output to stdout/stderr from all jobs executed by the order. 
8. You can download the log file by clicking the Download button from in the upper right-hand corner of the log view window. Also, you can expand and collapse the individual job output using the arrow button from the left chevron icons in the upper left-hand corner of the log view window.