// Copyright 2024 Google LLC

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

// http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

// This is a generated sample, using the typeless sample bot. Please

// look for the source TypeScript sample (.ts) for modifications.

'use strict';

/**

* This application demonstrates how to perform basic operations on

* subscriptions with the Google Cloud Pub/Sub API.

*

* For more information, see the README.md under /pubsub and the documentation

* at https://cloud.google.com/pubsub/docs.

*/

// sample-metadata:

// title: Update Topic Schema

// description: Update the schema on a topic.

// usage: node updateTopicSchema.js <topic-name-or-id> <first-revision-id> <last-revision-id>

// [START pubsub_update_topic_schema]

/**

* TODO(developer): Uncomment these variables before running the sample.

*/

// const topicNameOrId = 'YOUR_TOPIC_NAME_OR_ID';

// const firstRevisionId = 'YOUR_REVISION_ID';

// const lastRevisionId = 'YOUR_REVISION_ID';

// Imports the Google Cloud client library

const {PubSub} = require('@google-cloud/pubsub');

// Creates a client; cache this for further use

const pubSubClient = new PubSub();

async function updateTopicSchema(

topicNameOrId,

firstRevisionId,

lastRevisionId,

) {

const metadata = {

schemaSettings: {

firstRevisionId,

lastRevisionId,

},

};

await pubSubClient.topic(topicNameOrId).setMetadata(metadata);

console.log('Schema metadata updated successfully.');

}

// [END pubsub_update_topic_schema]

function main(

topicNameOrId = 'YOUR_TOPIC_NAME_OR_ID',

firstRevisionId = 'YOUR_REVISION_ID',

lastRevisionId = 'YOUR_REVISION_ID',

) {

updateTopicSchema(topicNameOrId, firstRevisionId, lastRevisionId).catch(

err => {

console.error(err.message);

process.exitCode = 1;

},

);

}

main(...process.argv.slice(2));