error_handling

Example - Error handling

This guide demonstrates handling DaprGrpcError errors when using the Dapr python-SDK. It's important to note that not all Dapr gRPC status errors are currently captured and transformed into a DaprGrpcError by the SDK. Efforts are ongoing to enhance this aspect, and contributions are welcome. For detailed information on error handling in Dapr, refer to the official documentation.

The example involves creating a DaprClient and invoking the save_state method. It uses the default configuration from Dapr init in self-hosted mode.

Pre-requisites

• Dapr CLI and initialized environment
• Install Python 3.8+

Install Dapr python-SDK

pip3 install dapr dapr-ext-grpc

Run the example

To run this example, the following code can be used:

dapr run -- python3 error_handling.py

The output should be as follows:

== APP == Status code: INVALID_ARGUMENT
== APP == Message: input key/keyPrefix 'key||' can't contain '||'
== APP == Error code: DAPR_STATE_ILLEGAL_KEY
== APP == Error info(reason): DAPR_STATE_ILLEGAL_KEY
== APP == Resource info (resource type): state
== APP == Resource info (resource name): statestore
== APP == Bad request (field): key||
== APP == Bad request (description): input key/keyPrefix 'key||' can't contain '||'
== APP == JSON: {"status_code": "INVALID_ARGUMENT", "message": "input key/keyPrefix 'key||' can't contain '||'", "error_code": "DAPR_STATE_ILLEGAL_KEY", "details": {"error_info": {"@type": "type.googleapis.com/google.rpc.ErrorInfo", "reason": "DAPR_STATE_ILLEGAL_KEY", "domain": "dapr.io"}, "retry_info": null, "debug_info": null, "quota_failure": null, "precondition_failure": null, "bad_request": {"@type": "type.googleapis.com/google.rpc.BadRequest", "field_violations": [{"field": "key||", "description": "input key/keyPrefix 'key||' can't contain '||'"}]}, "request_info": null, "resource_info": {"@type": "type.googleapis.com/google.rpc.ResourceInfo", "resource_type": "state", "resource_name": "statestore"}, "help": null, "localized_message": null}}