75 lines
2.4 KiB
JavaScript
75 lines
2.4 KiB
JavaScript
/* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. */
|
|
|
|
/******************************************************************************
|
|
*
|
|
* You may not use the identified files except in compliance with the Apache
|
|
* License, Version 2.0 (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.
|
|
*
|
|
* NAME
|
|
* calltimeout.js
|
|
*
|
|
* DESCRIPTION
|
|
* Shows how to time out long running database calls.
|
|
* See https://oracle.github.io/node-oracledb/doc/api.html#dbcalltimeouts
|
|
* Node-oracledb must be using Oracle Client 18c libraries, or greater.
|
|
*
|
|
* This example uses Async/Await of Node 8.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
let oracledb = require("oracledb");
|
|
let dbConfig = require('./dbconfig.js');
|
|
|
|
// "Sleep" in the database for a number of seconds.
|
|
// This uses an inefficent sleep implementation instead of
|
|
// dbms_lock.sleep() which not all users can use.
|
|
const sql = `
|
|
DECLARE
|
|
t DATE := SYSDATE + (:sleepsec * (1/86400));
|
|
BEGIN
|
|
LOOP
|
|
EXIT WHEN t <= SYSDATE;
|
|
END LOOP;
|
|
END;`;
|
|
|
|
let dboptime = 4; // seconds the DB operation will take
|
|
let timeout = 2; // seconds the application will wait for the DB operation
|
|
|
|
async function runTest() {
|
|
let connection;
|
|
|
|
try {
|
|
connection = await oracledb.getConnection(dbConfig);
|
|
connection.callTimeout = timeout * 1000; // milliseconds
|
|
console.log("Database call timeout set to " + connection.callTimeout / 1000 + " seconds");
|
|
console.log("Executing a " + dboptime + " second DB operation");
|
|
await connection.execute(sql, [dboptime]);
|
|
console.log("DB operation successfully completed");
|
|
} catch (err) {
|
|
if (err.message.startsWith('DPI-1067:') || err.errorNum === 3114)
|
|
console.log('DB operation was stopped after exceeding the call timeout');
|
|
else
|
|
console.error(err);
|
|
} finally {
|
|
if (connection) {
|
|
try {
|
|
await connection.close();
|
|
} catch (err) {
|
|
console.error(err);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
runTest();
|