Eseguire il polling di un'operazione a lunga esecuzione
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Per eseguire il polling di un'operazione, chiama ripetutamente il metodo get_long_running_operation()
finché l'operazione non viene completata. Utilizza un backoff tra una richiesta di polling e l'altra, ad esempio 10 secondi.
Per saperne di più
Per la documentazione dettagliata che include questo esempio di codice, vedi quanto segue:
Esempio di codice
Salvo quando diversamente specificato, i contenuti di questa pagina sono concessi in base alla licenza Creative Commons Attribution 4.0, mentre gli esempi di codice sono concessi in base alla licenza Apache 2.0. Per ulteriori dettagli, consulta le norme del sito di Google Developers. Java è un marchio registrato di Oracle e/o delle sue consociate.
[[["Facile da capire","easyToUnderstand","thumb-up"],["Il problema è stato risolto","solvedMyProblem","thumb-up"],["Altra","otherUp","thumb-up"]],[["Difficile da capire","hardToUnderstand","thumb-down"],["Informazioni o codice di esempio errati","incorrectInformationOrSampleCode","thumb-down"],["Mancano le informazioni o gli esempi di cui ho bisogno","missingTheInformationSamplesINeed","thumb-down"],["Problema di traduzione","translationIssue","thumb-down"],["Altra","otherDown","thumb-down"]],[],[[["\u003cp\u003eTo check the status of a long-running operation, repeatedly call the \u003ccode\u003eget_long_running_operation()\u003c/code\u003e method.\u003c/p\u003e\n"],["\u003cp\u003eIt is recommended to implement a backoff, such as a 10-second delay, between each polling request.\u003c/p\u003e\n"],["\u003cp\u003eThe provided Python code sample demonstrates how to poll an operation until it completes, using a \u003ccode\u003ewhile\u003c/code\u003e loop to continue checking.\u003c/p\u003e\n"],["\u003cp\u003eSetting up Application Default Credentials is required for authenticating to Document AI, and more information is provided in the link.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003epoll_operation_sample\u003c/code\u003e function in the provided code can be used to perform the polling of an operation.\u003c/p\u003e\n"]]],[],null,["# Poll a long-running operation\n\nTo poll an operation, repeatedly call the `get_long_running_operation()` method until the operation finishes. Use a backoff between each poll request, such as 10 seconds.\n\nExplore further\n---------------\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Managing long-running operations (LROs)](/document-ai/docs/long-running-operations)\n\nCode sample\n-----------\n\n### Python\n\n\nFor more information, see the\n[Document AI Python API\nreference documentation](/python/docs/reference/documentai/latest).\n\n\nTo authenticate to Document AI, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n\n from time import sleep\n\n from google.api_core.client_options import ClientOptions\n from google.cloud import documentai # type: ignore\n from google.longrunning.operations_pb2 import GetOperationRequest # type: ignore\n\n # TODO(developer): Uncomment these variables before running the sample.\n # location = \"YOUR_PROCESSOR_LOCATION\" # Format is \"us\" or \"eu\"\n # operation_name = \"YOUR_OPERATION_NAME\" # Format is \"projects/{project_id}/locations/{location}/operations/{operation_id}\"\n\n\n def poll_operation_sample(location: str, operation_name: str) -\u003e None:\n # You must set the `api_endpoint` if you use a location other than \"us\".\n opts = ClientOptions(api_endpoint=f\"{location}-documentai.googleapis.com\")\n client = documentai.https://cloud.google.com/python/docs/reference/documentai/latest/google.cloud.documentai_v1.services.document_processor_service.DocumentProcessorServiceClient.html(client_options=opts)\n\n request = GetOperationRequest(name=operation_name)\n\n while True:\n # Make GetOperation request\n operation = client.https://cloud.google.com/python/docs/reference/documentai/latest/google.cloud.documentai_v1.services.document_processor_service.DocumentProcessorServiceClient.html#google_cloud_documentai_v1_services_document_processor_service_DocumentProcessorServiceClient_get_operation(request=request)\n # Print the Operation Information\n print(operation)\n\n # Stop polling when Operation is no longer running\n if operation.done:\n break\n\n # Wait 10 seconds before polling again\n sleep(10)\n\nWhat's next\n-----------\n\n\nTo search and filter code samples for other Google Cloud products, see the\n[Google Cloud sample browser](/docs/samples?product=documentai)."]]