\n \n topic | \n Topic name which your server subscription will belong to | \n
\n \n subscription | \n Subscription name which your server will listen to | \n
\n \n replyTopic | \n Topic name which your client subscription will belong to | \n
\n \n replySubscription | \n Subscription name which your client will listen to | \n
\n \n noAck | \n If false, manual acknowledgment mode enabled | \n
\n \n init | \n If false, topics and subscriptions will not be created, only validated | \n
\n \n checkExistence | \n If false, topics and subscriptions will not be checked, only used. This only applies when init is false | \n
\n \n client | \n Additional client options (read more here) | \n
\n \n publisher | \n Additional topic publisher options (read more here) | \n
\n \n subscriber | \n Additional subscriber options (read more here) | \n
\n \n createSubscriptionOptions | \n Options to create subscription if init is set to true and a subscription is needed to be created (read more here) | \n
\n \n autoResume | \n Automatically resume publishing a message with ordering key if it fails (read more here) | \n
\n \n autoDeleteSubscriptionOnShutdown | \n Automatically delete the subscription that is connected by the client on shutdown. If the deletion fails, it will close the subscription | \n
\n \n clientIdFilter | \n Allows a client to only receive the response from its own request | \n
\n \n appendClientIdtoSubscription | \n Append client id to the name of the subscription on init | \n
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\n\n#### Client\n\nClient can be instantiated by importing `GCPubSubClientModule` to the root module. The clients can be registered with both the `register` method or the `registerAsync` method via `useFactory`.\n\n```typescript\n@Module({\n imports: [\n GCPubSubClientModule.register([{\n name: 'client-1'.\n config: options\n }]),\n GCPubSubClientModule.registerAsync([{\n name: 'client-2',\n imports: [ConfigModule],\n inject: [ConfigService],\n useFactory: (configService: ConfigService) => {\n return this.configService.get('GCPubSubClientOptions')\n }\n }])\n ]\n})\nexport class AppModule {}\n```\n\nThe client can then be injected with `@InjectGCPubSubClient` decorator\n\n```typescript\n@Injectable()\nexport class AppService {\n constructor(\n @InjectGCPubSubClient('client-1') private readonly client: GCPubSUbCLient,\n ) {}\n}\n```\n\nIf the token for the client is needed for tests, the package provides a utility function `getGCPubSubClientToken` to retrive the provider token of the client.\n\n```typescript\nconst token = getGCPubSubClientToken('client-1');\n```\n\n#### Message\n\nTo fully utilize the features provided by Google PubSub, the message needs to be serialized and deserialized in a certain way to ensure the integrity of the data. Therefore, a helper class, `GCPubSubMessageBuilder` is available to build messages with features such as attributes, ordering key and timeouts.\n\n##### GCPubSubMessageBuilder\n\n![\"Nest](\"https://nestjs.com/img/logo_text.svg\"){kind=logo}
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