70 lines
2.2 KiB
JavaScript
70 lines
2.2 KiB
JavaScript
/* Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved. */
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/******************************************************************************
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*
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* You may not use the identified files except in compliance with the Apache
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* License, Version 2.0 (the "License.")
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*
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0.
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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*
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* NAME
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* calltimeout.js
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*
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* DESCRIPTION
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* Shows how to time out long running database calls.
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* See https://oracle.github.io/node-oracledb/doc/api.html#dbcalltimeouts
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*
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* This example requires node-oracledb 3 or later.
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* Node-oracledb must be using Oracle Client 18c libraries, or greater.
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*
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* This example uses Node 8's async/await syntax.
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*
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*****************************************************************************/
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const oracledb = require("oracledb");
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const dbConfig = require('./dbconfig.js');
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const dboptime = 4; // seconds the simulated database operation will take
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const timeout = 2; // seconds the application will wait for the database operation
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async function run() {
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let connection;
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try {
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connection = await oracledb.getConnection(dbConfig);
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connection.callTimeout = timeout * 1000; // milliseconds
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console.log("Database call timeout set to " + connection.callTimeout / 1000 + " seconds");
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console.log("Executing a " + dboptime + " second DB operation");
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await connection.execute(`BEGIN DBMS_SESSION.SLEEP(:sleepsec); END;`, [dboptime]);
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console.log("Database operation successfully completed");
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} catch (err) {
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if (err.message.startsWith('DPI-1067:') || err.errorNum === 3114)
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console.log('Database operation was stopped after exceeding the call timeout');
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else
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console.error(err);
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} finally {
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if (connection) {
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try {
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await connection.close();
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} catch (err) {
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console.error(err);
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}
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}
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}
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}
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run();
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