first commit

packages/nodes-base/nodes/Oracle/Sql/transport/index.ts

@@ -0,0 +1,67 @@
+import type {
+	IExecuteFunctions,
+	ICredentialTestFunctions,
+	ILoadOptionsFunctions,
+	ITriggerFunctions,
+} from 'n8n-workflow';
+import oracledb from 'oracledb';
+
+import { ConnectionPoolManager } from '@utils/connection-pool-manager';
+
+import type { OracleDBNodeOptions, OracleDBNodeCredentials } from '../helpers/interfaces';
+
+// used for thick mode to call initOracleClient API only once.
+let initializeDriverMode = false;
+
+const getOracleDBConfig = (credentials: OracleDBNodeCredentials) => {
+	const { useThickMode, useSSL, ...dbConfig } = {
+		...credentials,
+		privilege: credentials.privilege || undefined,
+	};
+
+	return dbConfig;
+};
+
+export async function configureOracleDB(
+	this: IExecuteFunctions | ICredentialTestFunctions | ILoadOptionsFunctions | ITriggerFunctions,
+	credentials: OracleDBNodeCredentials,
+	options: OracleDBNodeOptions = {},
+): Promise<oracledb.Pool> {
+	const poolManager = ConnectionPoolManager.getInstance(this.logger);
+	const fallBackHandler = async (abortController: AbortController): Promise<oracledb.Pool> => {
+		const dbConfig = getOracleDBConfig(credentials);
+
+		if (credentials.useThickMode) {
+			if (!initializeDriverMode) {
+				oracledb.initOracleClient();
+				initializeDriverMode = true;
+			}
+		} else if (initializeDriverMode) {
+			// Thick mode is initialized, cannot switch back to thin mode
+			throw new Error('Thin mode can not be used after thick mode initialization');
+		}
+		const pool = await oracledb.createPool(dbConfig);
+
+		abortController.signal.addEventListener('abort', async () => {
+			try {
+				await pool.close();
+				this.logger.debug('pool closed on abort');
+			} catch (error) {
+				this.logger.error('Error closing pool on abort', { error });
+			}
+		});
+		return pool;
+	};
+
+	return await poolManager.getConnection<oracledb.Pool>({
+		credentials,
+		nodeType: 'oracledb',
+		nodeVersion: String(options.nodeVersion ?? '1'),
+		fallBackHandler,
+		wasUsed: (pool) => {
+			if (pool) {
+				this.logger.debug(`DB pool reused, open connections: ${pool.connectionsOpen}`);
+			}
+		},
+	});
+}