Attivare la notifica degli eventi del modello con Cloud Functions e Pub/Sub
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In Vertex AI Vision, i modelli ricevono dati multimediali da dispositivi come le videocamere, eseguono previsioni di IA sui dati e producono annotazioni in modo continuo.
Spesso invii i dati elaborati a una destinazione dati ("data sink"), come un data warehouse multimediale o BigQuery, per ulteriori job di analisi. Tuttavia, potresti trovarti in una situazione in cui alcune annotazioni devono essere gestite in modo diverso o le esigenze di annotazione sono urgenti. Le integrazioni con Cloud Run e Pub/Sub ti aiutano a soddisfare queste esigenze.
Per poter attivare le notifiche degli eventi del modello, devi svolgere i seguenti passaggi:
Ascolta i dati del modello e genera eventi utilizzando le funzioni Cloud Run.
Invia gli eventi generati dalle funzioni Cloud Run tramite il canale di eventi Pub/Sub.
Modelli supportati
I seguenti modelli offrono la generazione di eventi delle funzioni Cloud Run e le integrazioni di notifiche di eventi Pub/Sub:
Facoltativo. Crea una funzione Cloud Run da utilizzare.
Se non crei la funzione Cloud Run prima di configurare le funzioni Cloud Run per elaborare l'output del modello, devi crearla durante questo processo.
Facoltativo. Crea un argomento Pub/Sub da utilizzare.
Se non crei l'argomento Pub/Sub prima di attivare la notifica degli eventi del modello con Pub/Sub, devi crearlo durante la procedura.
Facoltativo. Scegli e crea una sottoscrizione Pub/Sub.
Se non crei la sottoscrizione Pub/Sub prima di attivare la notifica degli eventi del modello con Pub/Sub, devi crearla dopo per leggere i messaggi da un argomento.
Configura le funzioni Cloud Run per elaborare l'output del modello
Per attivare le notifiche basate su eventi, devi prima configurare le funzioni Cloud Run per elaborare l'output del modello e generare eventi.
La funzione Cloud Run si connette al modello e ne ascolta l'output come azione di post-elaborazione. La funzione Cloud Run deve restituire un AppPlatformCloudFunctionResponse. Gli eventi
(appplatformeventbody) vengono
inviati all'argomento Pub/Sub che configuri nel passaggio successivo.
Funzione Cloud Run di esempio (modello di analisi dell'occupazione)
Funzione Cloud Run di esempio
/***RespondstoanyHTTPrequest.**@param{!express:Request}reqHTTPrequestcontext.*@param{!express:Response}resHTTPresponsecontext.*/exports.hello_http=(req,res)=>{//Loggingstatementcanbereadwithcmd`gcloudfunctionslogsread{$functionName}`.//Formoreaboutlogging,pleaseseehttps://cloud.google.com/functions/docs/monitoring//Theprocessoroutputwillbestoredinreq.body.constmessageString=constructMessage(req.body);//SendyourmessagetooperatoroutputwithresHTTPresponsecontext.res.status(200).send(messageString);};functionconstructMessage(data){//Typically,yourprocessoroutputshouldcontainsappPlatformMetadata & it's designed output.//Herewewillusetheoccupancyanalyticsmodelasanexample.constappPlatformMetadata=data.appPlatformMetadata;constannotations=data.annotations;constevents=[];for(constannotationofannotations){events.push({"event_message":"Event message goes here","payload":{"attr_key_goes_here":"val_goes_here"},"event_id":"event_id_goes_here"});}//Typically,yourcloudfunctionshouldreturnastringrepresentaJSONwhichhastwofields://"annotations"mustfollowthespecificationofthetargetmodel.//"events"shouldbeoftype"AppPlatformEventBody".constmessageJson={"annotations":annotations,"events":events,};returnJSON.stringify(messageJson);}
Segui le istruzioni riportate di seguito per inviare lo stream di output del modello alla funzione Cloud Run:
Console
Apri la scheda Applicazioni della dashboard di Vertex AI Vision.
Seleziona schemaVisualizza app accanto al nome della tua applicazione nell'elenco.
Fai clic sul modello supportato per aprire il riquadro laterale dei dettagli del modello.
Nell'elenco Post-elaborazione della sezione Notifica evento, seleziona la funzione Cloud Run esistente o creane una nuova.
Attivare la notifica degli eventi del modello con Pub/Sub
Dopo aver configurato le funzioni Cloud Run per elaborare l'output del modello e generare eventi, puoi configurare la notifica degli eventi con Pub/Sub. Per leggere i messaggi
da un argomento, devi anche
scegliere e creare una sottoscrizione Pub/Sub.
Console
Apri la scheda Applicazioni della dashboard di Vertex AI Vision.
[[["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"]],["Ultimo aggiornamento 2025-09-11 UTC."],[],[],null,["# Enable model event notification with Cloud Functions and Pub/Sub\n\nIn Vertex AI Vision, models receive media data from devices like cameras, run AI predictions on the data, and produce annotations continuously. Frequently you send that processed data to a data destination (\"data sink\") such as a media warehouse or BigQuery for further analytic jobs. However, you may have a case where some annotations must be handled differently, or the annotation needs are time-sensitive. Integrations with Cloud Run functions and Pub/Sub help you address these needs.\n\n\u003cbr /\u003e\n\nTo be able to enable model event notifications, you need to do the following:\n\n\u003cbr /\u003e\n\n1. Listen to the model data and generate events from it using Cloud Run functions.\n2. Send the Cloud Run functions generated events through the Pub/Sub event channel.\n\n#### Supported models\n\nThe following models offer Cloud Run functions event generation and\nPub/Sub event notification integrations:\n\n- [Occupancy analytics](/vision-ai/docs/occupancy-analytics-model) model\n- Vertex AI [custom-trained models](#add-vertex-custom-model)\n\nBefore you begin\n----------------\n\n- Create an app with, at minimum, a stream node and a [supported model](#event-supported-models) node.\n- Optional. [Install the Vertex AI Vision SDK](/vision-ai/docs/cloud-environment#get-source-code) and [ingest data](/vision-ai/docs/create-manage-streams#ingest-videos) into your app. If you don't do this before you set up event notification you must do it after.\n- Optional. [Create a Cloud Run function](/functions/docs/create-deploy-gcloud-1st-gen) to use. If you don't create your Cloud Run function before you configure Cloud Run functions to process model output, you must create it during that process.\n- Optional. [Create a Pub/Sub topic](/pubsub/docs/create-topic) to use. If you don't create your Pub/Sub topic before you enable model event notification with Pub/Sub, you must create it during that process.\n- Optional. [Choose and create a Pub/Sub subscription](/pubsub/docs/create-subscription). If you don't create your Pub/Sub subscription before you enable model event notification with Pub/Sub, you must create it after to read messages from a topic.\n\n### Configure Cloud Run functions to process model output\n\nTo trigger event-based notifications, you must first set up Cloud Run functions\nto process model output and generate events.\n\nYour Cloud Run function connects to the model and listens to its output\nas its post-processing action. The Cloud Run function you should return\nan [`AppPlatformCloudFunctionResponse`](/vision-ai/docs/reference/rpc/google.cloud.visionai.v1#appplatformcloudfunctionresponse). The events\n([`appplatformeventbody`](/vision-ai/docs/reference/rpc/google.cloud.visionai.v1#appplatformeventbody)) are\nsent to the Pub/Sub topic you configure in the next step.\n\n\u003cbr /\u003e\n\n#### Sample Cloud Run function (occupancy analytics model)\n\n### Sample Cloud Run function\n\n /**\n * Responds to any HTTP request.\n *\n * @param {!express:Request} req HTTP request context.\n * @param {!express:Response} res HTTP response context.\n */\n exports.hello_http = (req, res) =\u003e {\n // Logging statement can be read with cmd `gcloud functions logs read {$functionName}`.\n // For more about logging, please see https://cloud.google.com/functions/docs/monitoring\n\n // The processor output will be stored in req.body.\n const messageString = constructMessage(req.body);\n\n // Send your message to operator output with res HTTP response context.\n res.status(200).send(messageString);\n };\n\n function constructMessage(data) {\n // Typically, your processor output should contains appPlatformMetadata & it's designed output.\n // Here we will use the occupancy analytics model as an example.\n const appPlatformMetadata = data.appPlatformMetadata;\n const annotations = data.annotations;\n const events = [];\n for(const annotation of annotations) {\n events.push({\n \"event_message\": \"Event message goes here\",\n \"payload\" : {\n \"attr_key_goes_here\" : \"val_goes_here\"\n },\n \"event_id\" : \"event_id_goes_here\"\n });\n }\n\n // Typically, your cloud function should return a string represent a JSON which has two fields:\n // \"annotations\" must follow the specification of the target model.\n // \"events\" should be of type \"AppPlatformEventBody\".\n const messageJson = {\n \"annotations\": annotations,\n \"events\": events,\n };\n return JSON.stringify(messageJson);\n }\n\nUse the following instructions to\nto send the model output stream to your Cloud Run function: \n\n### Console\n\n1. Open the **Applications** tab of the Vertex AI Vision dashboard.\n\n [Go to the Applications tab](https://console.cloud.google.com/ai/vision-ai/applications)\n2. Select schema**View app** next to the\n name of your application from the list.\n\n3. Click on the [supported model](#event-supported-model) to open the model\n details side panel.\n\n4. In the **post-processing** list of the **Event notification** section,\n select your existing Cloud Run function, or create a new one.\n\n### Enable model event notification with Pub/Sub\n\nAfter you have set up Cloud Run functions to process model output and generate\nevents, you can set up event notification with Pub/Sub. To read messages\nfrom a topic, you also need to\n[Choose and create a Pub/Sub subscription](/pubsub/docs/create-subscription). \n\n### Console\n\n1. Open the **Applications** tab of the Vertex AI Vision dashboard.\n\n [Go to the Applications tab](https://console.cloud.google.com/ai/vision-ai/applications)\n2. Select schema**View app** next to the\n name of your application from the list.\n\n3. Click on the [supported model](#event-supported-model) to open the model\n details side panel.\n\n4. In the **Event notification** section, select\n **Set up event notification**.\n\n5. In the **Set up Pub/Sub for event notifications** option window that\n opens, choose your existing Pub/Sub topic, or create a new one.\n\n6. In the **Frequency** field, set an integer value for the frequency value\n in seconds a notification for the same type of event can be sent.\n\n7. Click **Set up**.\n\nWhat's next\n-----------\n\n- Read instructions about how to deploy your app to test model event notification in [Deploy and undeploy an application](/vision-ai/docs/deploy-app).\n- Work through the [Vertex AI Vision Occupancy Analytics app with event management](https://codelabs.developers.google.com/vertex-ai-event-management#0) codelab.\n- Learn more about Pub/Sub and Cloud Run functions in [What is Pub/Sub?](/pubsub/docs/overview) and the [Cloud Run functions overview](/functions/docs/concepts/overview)."]]