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Exception handling for Azure Durable Functions in Python
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| try: | |
| # Orchestration code here... | |
| except Exception as e: | |
| # Any exception that is raised by a function is re-raised by its enclosing | |
| # activity task. The original error message is part of the new exception | |
| # message, formatted as "Activity function '<function_name>' failed: | |
| # <exception_type>: <exception_message>", so a regex is used to extract the | |
| # original message and generate a friendlier output. | |
| function_name = None | |
| function_exception_type = None | |
| function_exception_msg = None | |
| activity_exception_msg = ''.join(e.args) | |
| activity_exception_matcher = re.search( | |
| r"Activity[\s]*function[\s]*'(?P<function_name>.+?)'[\s]*failed:" | |
| r"[\s]*(?P<exception_type>.+?):" | |
| r"[\s]*(?P<exception_message>.+?)[\s]*\n", activity_exception_msg) | |
| if activity_exception_matcher: | |
| function_name = activity_exception_matcher.group('function_name') | |
| function_exception_type = \ | |
| activity_exception_matcher.group('exception_type') | |
| function_exception_msg = \ | |
| activity_exception_matcher.group('exception_message') | |
| context.set_custom_status(function_exception_msg) | |
| orchestrator_msg = f"'{function_name}' raised {function_exception_type} >> " \ | |
| f" {function_exception_msg}'" \ | |
| if function_exception_msg else activity_exception_msg | |
| output.append(orchestrator_msg) | |
| raise Exception(output) |
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