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For this demonstration, we use an employee with employeeNumber=1002, which already exists in the system.
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As we can see, both "incrementEmployeeSalary" operations are executed at once when the boxcarring session ends with "end_boxcar", resulting in the salary value to 3500. If there's any error in any of the operations inside a boxcarring session, none of the operations will be executed and the service calls will roll-back. A boxcarring session can also be explicitly canceled by calling the "abort_boxcar" operation.
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