Google Cloud Pub/Sub (TsgcHTTPGoogleCloud_PubSub_Client) — sgcWebSockets

EN BREF

TsgcHTTPGoogleCloud_PubSub_Client

Google Cloud Pub/Sub REST client — create topics, publish messages, pull from subscriptions, acknowledge or modify ack deadlines from a typed Delphi component.

Classe du composant

TsgcHTTPGoogleCloud_PubSub_Client

Protocole

Pub/Sub REST API

Plateformes

Windows, macOS, Linux, iOS, Android

Édition

Standard / Professional / Enterprise

DÉMARRAGE RAPIDE

Charge le service account, publie, pull

Load your service-account JSON, set the project id, then call Publish to send a message and Pull to consume from a subscription.

uses
  sgcHTTP;

var
  PubSub: TsgcHTTPGoogleCloud_PubSub_Client;
begin
  PubSub := TsgcHTTPGoogleCloud_PubSub_Client.Create(nil);
  PubSub.GoogleCloudOptions.ServiceAccountJSON.LoadFromFile('service-account.json');

  // publish
  PubSub.Publish('projects/your-project/topics/topic-id',
    '{"event":"order_created","id":42}');

  // pull
  Memo1.Text := PubSub.Pull('projects/your-project/subscriptions/sub-id', 10);
end;

// uses: sgcHTTP
TsgcHTTPGoogleCloud_PubSub_Client *PubSub = new TsgcHTTPGoogleCloud_PubSub_Client(this);
PubSub->GoogleCloudOptions->ServiceAccountJSON->LoadFromFile("service-account.json");

PubSub->Publish("projects/p/topics/t", payload);
Memo1->Text = PubSub->Pull("projects/p/subscriptions/s", 10);

FONCTIONNALITÉS TECHNIQUES

Ce qu’il y a à l’intérieur

Wraps the Pub/Sub REST surface with the standard Google service-account auth flow.

Topic management

CreateTopic, DeleteTopic, GetTopic, ListTopics hit the /projects/<id>/topics endpoint family.

Publish

Publish sends one or more PubsubMessage entries with optional attributes and ordering keys, returning the assigned messageIds.

Pull / Acknowledge

Pull(subscription, maxMessages) returns received messages with their ackId; Acknowledge(subscription, ackIds) finalises them, ModifyAckDeadline extends processing time.

Service-account JWT

Same auth flow as the FCM and Calendar siblings — loads the JSON key, signs an RS256 JWT, exchanges for an OAuth token, refreshes when needed.

Subscription management

CreateSubscription, DeleteSubscription, UpdateSubscription, ListSubscriptions manage the subscription side of Pub/Sub.

Push or pull

Pull subscriptions are read with Pull; push subscriptions are configured to call your endpoint — typically a TsgcWebSocketHTTPServer instance behind a public URL.

STANDARDS

Spécifications et références

Sources de référence pour l'API implémentée par ce composant.

RESSOURCES

Documentation et démos

Lien direct vers la référence du composant, récupère le projet de démo prêt à exécuter et télécharge l’essai.

	Aide en ligne — Google Pub/Sub Client Référence complète des propriétés, méthodes et événements de ce composant.	Ouvrir
	Projet de démo — Demos\20.HTTP_Protocol\03.Google Projet d’exemple prêt à exécuter. Livré dans le paquet sgcWebSockets — télécharge l’essai ci-dessous.	Ouvrir
	Document technique (PDF) Features, quick start, code samples for Delphi & C++ Builder and primary-source references — this component only.	Ouvrir
	Manuel utilisateur (PDF) Manuel exhaustif couvrant chaque composant de la bibliothèque.	Ouvrir

Google Cloud Pub/Sub