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|
import chalk from "chalk";
import { getBrowserString } from "../lib/getBrowserString.js";
import createDriver from "./createDriver.js";
const workers = Object.create( null );
/**
* Keys are browser strings
* Structure of a worker:
* {
* debug: boolean, // Stops the worker from being cleaned up when finished
* id: string,
* lastTouch: number, // The last time a request was received
* url: string,
* browser: object, // The browser object
* options: object // The options to create the worker
* }
*/
// Acknowledge the worker within the time limit.
const ACKNOWLEDGE_INTERVAL = 1000;
const ACKNOWLEDGE_TIMEOUT = 60 * 1000 * 1;
const MAX_WORKER_RESTARTS = 5;
// No report after the time limit
// should refresh the worker
const RUN_WORKER_TIMEOUT = 60 * 1000 * 2;
const WORKER_WAIT_TIME = 30000;
// Limit concurrency to 8 by default in selenium
const MAX_CONCURRENCY = 8;
export function touchBrowser( browser ) {
const fullBrowser = getBrowserString( browser );
const worker = workers[ fullBrowser ];
if ( worker ) {
worker.lastTouch = Date.now();
}
}
async function waitForAck( worker, { fullBrowser, verbose } ) {
delete worker.lastTouch;
return new Promise( ( resolve, reject ) => {
const interval = setInterval( () => {
if ( worker.lastTouch ) {
if ( verbose ) {
console.log( `\n${ fullBrowser } acknowledged.` );
}
clearTimeout( timeout );
clearInterval( interval );
resolve();
}
}, ACKNOWLEDGE_INTERVAL );
const timeout = setTimeout( () => {
clearInterval( interval );
reject(
new Error(
`${ fullBrowser } not acknowledged after ${
ACKNOWLEDGE_TIMEOUT / 1000 / 60
}min.`
)
);
}, ACKNOWLEDGE_TIMEOUT );
} );
}
async function restartWorker( worker ) {
await cleanupWorker( worker, worker.options );
await createBrowserWorker(
worker.url,
worker.browser,
worker.options,
worker.restarts + 1
);
}
async function ensureAcknowledged( worker ) {
const fullBrowser = getBrowserString( worker.browser );
const verbose = worker.options.verbose;
try {
await waitForAck( worker, { fullBrowser, verbose } );
return worker;
} catch ( error ) {
console.error( error.message );
await restartWorker( worker );
}
}
export async function createBrowserWorker( url, browser, options, restarts = 0 ) {
if ( restarts > MAX_WORKER_RESTARTS ) {
throw new Error(
`Reached the maximum number of restarts for ${ chalk.yellow(
getBrowserString( browser )
) }`
);
}
const { concurrency = MAX_CONCURRENCY, debug, headless, verbose } = options;
while ( workers.length >= concurrency ) {
if ( verbose ) {
console.log( "\nWaiting for available sessions..." );
}
await new Promise( ( resolve ) => setTimeout( resolve, WORKER_WAIT_TIME ) );
}
const fullBrowser = getBrowserString( browser );
const driver = await createDriver( {
browserName: browser.browser,
headless,
url,
verbose
} );
const worker = {
debug: !!debug,
driver,
url,
browser,
restarts,
options
};
worker.debug = !!debug;
worker.url = url;
worker.browser = browser;
worker.restarts = restarts;
worker.options = options;
touchBrowser( browser );
workers[ fullBrowser ] = worker;
// Wait for the worker to show up in the list
// before returning it.
return ensureAcknowledged( worker );
}
export async function setBrowserWorkerUrl( browser, url ) {
const fullBrowser = getBrowserString( browser );
const worker = workers[ fullBrowser ];
if ( worker ) {
worker.url = url;
}
}
/**
* Checks that all browsers have received
* a response in the given amount of time.
* If not, the worker is restarted.
*/
export async function checkLastTouches() {
for ( const [ fullBrowser, worker ] of Object.entries( workers ) ) {
if ( Date.now() - worker.lastTouch > RUN_WORKER_TIMEOUT ) {
const options = worker.options;
if ( options.verbose ) {
console.log(
`\nNo response from ${ chalk.yellow( fullBrowser ) } in ${
RUN_WORKER_TIMEOUT / 1000 / 60
}min.`
);
}
await restartWorker( worker );
}
}
}
export async function cleanupWorker( worker, { verbose } ) {
for ( const [ fullBrowser, w ] of Object.entries( workers ) ) {
if ( w === worker ) {
delete workers[ fullBrowser ];
await w.driver.quit();
if ( verbose ) {
console.log( `\nStopped ${ fullBrowser }.` );
}
return;
}
}
}
export async function cleanupAllBrowsers( { verbose } ) {
const workersRemaining = Object.values( workers );
const numRemaining = workersRemaining.length;
if ( numRemaining ) {
try {
await Promise.all(
workersRemaining.map( ( worker ) => worker.driver.quit() )
);
if ( verbose ) {
console.log(
`Stopped ${ numRemaining } browser${ numRemaining > 1 ? "s" : "" }.`
);
}
} catch ( error ) {
// Log the error, but do not consider the test run failed
console.error( error );
}
}
}
|
