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// 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.
// sample-metadata:
// title: Add and drop new database role
// usage: node add-and-drop-new-database-role.js <INSTANCE_ID> <DATABASE_ID> <PROJECT_ID>
'use strict';
function main(
instanceId = 'my-instance',
databaseId = 'my-database',
projectId = 'my-project-id',
) {
// [START spanner_add_and_drop_database_role]
/**
* TODO(developer): Uncomment these variables before running the sample.
*/
// const instanceId = 'my-instance';
// const databaseId = 'my-database';
// const projectId = 'my-project-id';
// Imports the Google Cloud client library
const {Spanner} = require('@google-cloud/spanner');
// creates a client
const spanner = new Spanner({
projectId: projectId,
});
const databaseAdminClient = spanner.getDatabaseAdminClient();
async function addAndDropNewDatabaseRole() {
// Creates a new user defined role and grant permissions
try {
const request = [
'CREATE ROLE parent',
'GRANT SELECT ON TABLE Singers TO ROLE parent',
'CREATE ROLE child',
'GRANT ROLE parent TO ROLE child',
];
const [operation] = await databaseAdminClient.updateDatabaseDdl({
database: databaseAdminClient.databasePath(
projectId,
instanceId,
databaseId,
),
statements: request,
});
console.log('Waiting for operation to complete...');
await operation.promise();
console.log('Created roles child and parent and granted privileges');
} catch (err) {
console.error('ERROR:', err);
}
// Revoke permissions and drop child role.
// A role can't be dropped until all its permissions are revoked.
try {
const request = ['REVOKE ROLE parent FROM ROLE child', 'DROP ROLE child'];
const [operation] = await databaseAdminClient.updateDatabaseDdl({
database: databaseAdminClient.databasePath(
projectId,
instanceId,
databaseId,
),
statements: request,
});
console.log('Waiting for operation to complete...');
await operation.promise();
console.log('Revoked privileges and dropped role child');
} catch (err) {
console.error('ERROR:', err);
} finally {
// Close the spanner client when finished.
// The databaseAdminClient does not require explicit closure. The closure of the Spanner client will automatically close the databaseAdminClient.
spanner.close();
}
}
addAndDropNewDatabaseRole();
// [END spanner_add_and_drop_database_role]
}
process.on('unhandledRejection', err => {
console.error(err.message);
process.exitCode = 1;
});
main(...process.argv.slice(2));