Zend con 2016 - Asynchronous Prorgamming in PHP
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The document discusses asynchronous programming in PHP, covering various strategies such as forking, threading, and asynchronous I/O, and detailing libraries and methodologies for implementing these concepts. It highlights real-world performance data and compares traditional synchronous methods with asynchronous techniques, offering examples of code implementations. The presentation also touches on interoperability within asynchronous programming and available tools in the PHP ecosystem.
![E V E N T L O O P E X A M P L E
<?php
# Build objects to handle asynchronous interaction
$loop = ReactEventLoopFactory::create();
$dnsFactory = new ReactDnsResolverFactory();
$dns = $dnsFactory->createCached('8.8.8.8', $loop);
$factory = new ReactHttpClientFactory();
$client = $factory->create($loop, $dns);
$resp = array();
# Create callback for handling response
$responseHandler = function ($response) use ($resp) {
$response->on( 'data', function ($data) use ($resp) {
$resp[] = $data;
});
};
# Queue up requests to send
$request = $client->request('GET', 'http://www.timeapi.org/utc/now');
$request->on('response', $responseHandler);
$request->end();
$request = $client->request('GET', 'http://www.timeapi.org/utc/now');
$request->on('response', $responseHandler);
$request->end();
# Run the loop
$loop->run();](https://image.slidesharecdn.com/zendcon2016-asynchronousprgramminginphp-161020211840/85/Zend-con-2016-Asynchronous-Prorgamming-in-PHP-22-320.jpg)
![C A L L B A C K S V S . G E N E R AT O R S
class MyRequestHandler implements RequestHandler {
public function onRequest(Request $request, Socket $socket)
{
$response = new BasicResponse(Response::OK, [
'Content-Type' => 'text/plain',
]);
yield from $response->getBody()->end('Hello, world!');
return $response;
}
public function onError(int $code, Socket $socket)
{
return new BasicResponse($code);
}
}
$server = new Server(new MyRequestHandler());
$server->listen(8080);
Looprun();
$loop = ReactEventLoopFactory::create();
$socket = new ReactSocketServer($loop);
$http = new ReactHttpServer($socket);
$http->on('request', function ($request, $response) {
$response->writeHead(200, [‘Content-Type' => ‘text/plain']);
$response->end("Hello World!n");
});
$socket->listen(8080);
$loop->run();
Callback Generators](https://image.slidesharecdn.com/zendcon2016-asynchronousprgramminginphp-161020211840/85/Zend-con-2016-Asynchronous-Prorgamming-in-PHP-25-320.jpg)
![P H O T O C R E D I T S B Y S L I D E
1: By SteveD. (Flickr) [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons
3: Copyright 2016 by Adam Englander. All rights reserved.
5: By Strober (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
8: By Retro-Computing Society of Rhode Island - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/
index.php?curid=5094687
11: By Victorgrigas - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=20348454
15/16: By Justin De La Ornellas from China Town, Hawaii (avex18 Uploaded by clusternote) [CC BY 2.0 (http://
creativecommons.org/licenses/by/2.0)], via Wikimedia Commons
19: By Yoga Balaji - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=35101769
21 Left: User: (WT-shared) Jpatokal at wts wikivoyage [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/
3.0)], via Wikimedia Commons
All others are public domain](https://image.slidesharecdn.com/zendcon2016-asynchronousprgramminginphp-161020211840/85/Zend-con-2016-Asynchronous-Prorgamming-in-PHP-30-320.jpg)
Zend con 2016 - Asynchronous Prorgamming in PHP
- 1. A S Y N C H R O N O U S P R O G R A M M I N G I N P H P Z E N D C O N 2 0 1 6
- 2. W E L C O M E T O L A S V E G A S !
- 3. W H O A M I ?
- 4. W H Y A S Y N C H R O N O U S ?
- 5. H I G H T R A F F I C
- 6. R E A C T I V E A P P L I C AT I O N S
- 7. I N T E R N E T O F T H I N G S
- 8. S TAT E F U L P R O T O C O L S E R V E R S • WebSocket • MQTT • AMQP • IRC • XMPP • Telnet • SSH • RADIUS • LDAP • FTP
- 9. H T T P / 2
- 10. H O W D O Y O U D O A S Y N C ?
- 11. S Y S T E M L E V E L A S Y N C • German • Apache Spark • AWS Lambda • Stomp • ZeroMQ • AMQP J O B S E R V E R S Q U E U I N G
- 12. C O D E L E V E L A S Y N C • Forking and Threading • Asynchronous I/O • Fork/Join • Event Loop S T R AT E G I E S M E T H O D O L O G I E S
- 13. F O R K I N G A N D T H R E A D I N G • Available in PHP core since PHP 4.1 • Requires the use of shared memory • Requires code to be written for management of forks/threads • Creates separate copies of code for each thread/ fork
- 14. F O R K I N G / T H R E A D I N G L I B R A R I E S • PCNTL/POSIX — Forking and process management • pthreads — Thread management • Semaphore — Semaphore (locks) and shared memory • Shared Memory — Shared memory • Sync — Cross platform semaphore and shared memory
- 15. A S Y N C H R O N O U S I / O • Frees up the current process while I/O is performed • Executes code based on I/O events • No copying of code for separate process
- 16. R E A L W O R L D P R O F I L E D ATA C AT E G O RY S E G M E N T % T I M E AV G C A L L S ( P E R T X N ) AV G T I M E ( M S ) D ATA B A S E M Y S Q L A P P S S E L E C T 7 2 . 6 2 . 0 3 4 . 8 F U N C T I O N A P I . H A N D L E R S . A P P S : A P P H A N D L E R . R E N D E R _ R E S O U R C E 1 2 . 6 1 . 0 6 . 0 4 D ATA B A S E M Y S Q L A P P U S E R M A P S E L E C T 8 . 7 3 . 9 7 4 . 1 6 F U N C T I O N P Y R A M I D . R O U T E R : R O U T E R . _ _ C A L L _ _ 3 . 3 1 . 0 1 . 5 9 M Y S Q L O R G A N I Z AT I O N S S E L E C T 2 . 2 0 . 7 1 . 5 2
- 17. A S Y N C H R O N O U S I / O L I B R A R I E S • Streams via stream_select and socket_select • eio — libeio • ev — libev • libevent — libevent • event — libevent
- 18. F O R K / T H R E A D V S A S Y N C I / O • Compute heavy • Process isolation • Non-Async library • I/O processes • Process/memory optimization F O R K / T H R E A D A S Y N C / I O
- 19. F O R K / J O I N PA R A L L E L I S M S TA RT P R O C E S S 1 P R O C E S S 2 P R O C E S S 3 E N DF O R K J O I N
- 20. F O R K / J O I N E X A M P L E // JOIN curl_multi_remove_handle($mh, $ch1); curl_multi_remove_handle($mh, $ch2); curl_multi_close($mh); $resp = array(curl_multi_getcontent($ch1), curl_multi_getcontent($ch2)); // FORK $active = null; // Initiate the calls and check for completion do { $mrc = curl_multi_exec($mh, $active); } while ($mrc == CURLM_CALL_MULTI_PERFORM); while ($active && $mrc == CURLM_OK) { if (curl_multi_select($mh) != -1) { do { $mrc = curl_multi_exec($mh, $active); } while ($mrc == CURLM_CALL_MULTI_PERFORM); } } <?php // Create both cURL resources and add to cURL Multi $ch1 = curl_init('http://www.timeapi.org/utc/now'); $ch2 = curl_init('http://www.timeapi.org/utc/now'); $mh = curl_multi_init(); curl_multi_add_handle($mh,$ch1); curl_multi_add_handle($mh,$ch2);
- 21. E V E N T L O O P PA R A L L E L I S M P R O C E S S Q U E U E I T E M Q U E U E I T E M I N Q U E U E ? X Yes No A S Y N C P R O C E S S A S Y N C P R O C E S S A S Y N C P R O C E S S A S Y N C P R O C E S S
- 22. E V E N T L O O P E X A M P L E <?php # Build objects to handle asynchronous interaction $loop = ReactEventLoopFactory::create(); $dnsFactory = new ReactDnsResolverFactory(); $dns = $dnsFactory->createCached('8.8.8.8', $loop); $factory = new ReactHttpClientFactory(); $client = $factory->create($loop, $dns); $resp = array(); # Create callback for handling response $responseHandler = function ($response) use ($resp) { $response->on( 'data', function ($data) use ($resp) { $resp[] = $data; }); }; # Queue up requests to send $request = $client->request('GET', 'http://www.timeapi.org/utc/now'); $request->on('response', $responseHandler); $request->end(); $request = $client->request('GET', 'http://www.timeapi.org/utc/now'); $request->on('response', $responseHandler); $request->end(); # Run the loop $loop->run();
- 23. F O R K / J O I N V S E V E N T L O O P • Enhancing existing traditional synchronous apps • Hack/HHVM • Non-HTTP apps • Full async apps • High volume apps F O R K J O I N E V E N T L O O P
- 24. C A L L B A C K S V S . G E N E R AT O R S
- 25. C A L L B A C K S V S . G E N E R AT O R S class MyRequestHandler implements RequestHandler { public function onRequest(Request $request, Socket $socket) { $response = new BasicResponse(Response::OK, [ 'Content-Type' => 'text/plain', ]); yield from $response->getBody()->end('Hello, world!'); return $response; } public function onError(int $code, Socket $socket) { return new BasicResponse($code); } } $server = new Server(new MyRequestHandler()); $server->listen(8080); Looprun(); $loop = ReactEventLoopFactory::create(); $socket = new ReactSocketServer($loop); $http = new ReactHttpServer($socket); $http->on('request', function ($request, $response) { $response->writeHead(200, [‘Content-Type' => ‘text/plain']); $response->end("Hello World!n"); }); $socket->listen(8080); $loop->run(); Callback Generators
- 26. W H AT L I E S A H E A D ?
- 27. R E S O U R C E S amphp icicle.io ReactPHP PHP Asynchronous Interoperability Group RecoilHack/HHVM
- 28. Q U E S T I O N S ?
- 29. https://joind.in/19455 P L E A S E R A T E T H I S TA L K !
- 30. P H O T O C R E D I T S B Y S L I D E 1: By SteveD. (Flickr) [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons 3: Copyright 2016 by Adam Englander. All rights reserved. 5: By Strober (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons 8: By Retro-Computing Society of Rhode Island - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/ index.php?curid=5094687 11: By Victorgrigas - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=20348454 15/16: By Justin De La Ornellas from China Town, Hawaii (avex18 Uploaded by clusternote) [CC BY 2.0 (http:// creativecommons.org/licenses/by/2.0)], via Wikimedia Commons 19: By Yoga Balaji - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=35101769 21 Left: User: (WT-shared) Jpatokal at wts wikivoyage [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/ 3.0)], via Wikimedia Commons All others are public domain