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React (phpnw)

React (phpnw)

Igor Wiedler

October 06, 2012
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  1. Saturday, October 6, 12

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  2. @igorwesome
    Saturday, October 6, 12

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  3. Saturday, October 6, 12

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  4. Saturday, October 6, 12

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  5. Saturday, October 6, 12

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  6. var http = require('http');
    var server = new http.Server();
    server.on('request', function (req, res) {
    res.writeHead(200, {'Content-Type': 'text/plain'});
    res.end('Hello World\n');
    });
    server.listen(1337, '127.0.0.1');
    Saturday, October 6, 12

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  7. Saturday, October 6, 12

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  8. Saturday, October 6, 12

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  9. $server = stream_socket_server('tcp://127.0.0.1:1337');
    while ($conn = stream_socket_accept($server, -1)) {
    fwrite($conn, "HTTP/1.1 200 OK\r\n");
    fwrite($conn, "Content-Length: 3\r\n\r\n");
    fwrite($conn, "Hi\n");
    fclose($conn);
    }
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  10. $s=stream_socket_server('tcp://[::1]:81');
    while($c=stream_socket_accept($s,-1))
    fwrite($c,"HTTP/1.1 200 OK\r\nContent-Length: 2\r\n\r\nHi");
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  11. Non-blocking I/O
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  12. C10K
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  13. Calculations are fast, I/O is slow.
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  14. Latency Comparison Numbers
    --------------------------
    L1 cache reference 0.5 ns
    Branch mispredict 5 ns
    L2 cache reference 7 ns
    Mutex lock/unlock 25 ns
    Main memory reference 100 ns
    Compress 1K bytes with Zippy 3,000 ns
    Send 1K bytes over 1 Gbps network 10,000 ns 0.01 ms
    Read 4K randomly from SSD* 150,000 ns 0.15 ms
    Read 1 MB sequentially from memory 250,000 ns 0.25 ms
    Round trip within same datacenter 500,000 ns 0.5 ms
    Read 1 MB sequentially from SSD* 1,000,000 ns 1 ms
    Disk seek 10,000,000 ns 10 ms
    Read 1 MB sequentially from disk 20,000,000 ns 20 ms
    Send packet CA->Netherlands->CA 150,000,000 ns 150 ms
    Saturday, October 6, 12

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  15. Latency Comparison Numbers
    --------------------------
    L1 cache reference 0.5 ns
    Branch mispredict 5 ns
    L2 cache reference 7 ns
    Mutex lock/unlock 25 ns
    Main memory reference 100 ns
    Compress 1K bytes with Zippy 3,000 ns
    Send 1K bytes over 1 Gbps network 10,000 ns 0.01 ms
    Read 4K randomly from SSD* 150,000 ns 0.15 ms
    Read 1 MB sequentially from memory 250,000 ns 0.25 ms
    Round trip within same datacenter 500,000 ns 0.5 ms
    Read 1 MB sequentially from SSD* 1,000,000 ns 1 ms
    Disk seek 10,000,000 ns 10 ms
    Read 1 MB sequentially from disk 20,000,000 ns 20 ms
    Send packet CA->Netherlands->CA 150,000,000 ns 150 ms
    Saturday, October 6, 12

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  16. Saturday, October 6, 12

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  17. stream_select
    Saturday, October 6, 12

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  18. $readable = $read ?: null;
    $writable = $write ?: null;
    $except = null;
    if (stream_select($readable, $writable, $except, 1)) {
    if ($readable) {
    foreach ($readable as $stream) {
    ...
    }
    }
    if ($writable) {
    foreach ($writable as $stream) {
    ...
    }
    }
    }
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  19. $readable = $read ?: null;
    $writable = $write ?: null;
    $except = null;
    if (stream_select($readable, $writable, $except, 1)) {
    if ($readable) {
    foreach ($readable as $stream) {
    ...
    }
    }
    if ($writable) {
    foreach ($writable as $stream) {
    ...
    }
    }
    }
    Event Loop
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  20. Saturday, October 6, 12

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  21. $server = stream_socket_server('tcp://127.0.0.1:1337');
    $read = [$server];
    $write = [];
    ...
    // deep in the event loop
    foreach ($readable as $stream) {
    if ($server === $stream) {
    $conn = stream_socket_accept($server, 0);
    $read[] = $conn;
    } else {
    $data = fread($stream, 1024);
    echo $data;
    }
    }
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  22. Saturday, October 6, 12

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  23. Saturday, October 6, 12

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  24. Event-driven, non-blocking I/O with PHP.
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  25. $loop = React\EventLoop\Factory::create();
    $socket = new React\Socket\Server($loop);
    $http = new React\Http\Server($socket, $loop);
    $http->on('request', function ($req, $rep) {
    $rep->writeHead();
    $rep->end("Hello World!\n");
    });
    $socket->listen(8080);
    $loop->run();
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  26. $loop = React\EventLoop\Factory::create();
    $socket = new React\Socket\Server($loop);
    $socket->on('connection', function ($conn) {
    $conn->pipe($conn);
    });
    $socket->listen(4000);
    $loop->run();
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  27. Saturday, October 6, 12

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  28. # composer.json
    {
    "require": {
    "react/http": "0.2.*"
    }
    }
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  29. $ composer install
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  30. Saturday, October 6, 12

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  31. Philosophy
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  32. Architecture
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  33. Événement
    EventEmitter for PHP
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  34. $emitter = new Evenement\EventEmitter();
    $emitter->on('data', function ($data) {
    echo $data;
    });
    $emitter->emit('data', [$data]);
    Saturday, October 6, 12

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  35. EventLoop
    Stream
    Socket
    Http
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  36. EventLoop
    $loop = React\EventLoop\Factory::create();
    $server = stream_socket_server('tcp://127.0.0.1:8080');
    stream_set_blocking($server, 0);
    $loop->addReadStream($server, function ($server) use ($loop) {
    $conn = stream_socket_accept($server);
    ...
    });
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  37. EventLoop
    $loop->addPeriodicTimer(5, function () {
    $memory = memory_get_usage() / 1024;
    $formatted = number_format($memory, 3).'K';
    echo "Current memory usage: {$formatted}\n";
    });
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  38. EventLoop
    $loop->run();
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  39. EventLoop
    backends
    stream_select
    libevent
    upcoming
    libev
    libuv
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  40. ReadableStream
    isReadable()
    pause()
    resume()
    close()
    Events
    data, end, error, close
    Stream
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  41. ReadableStream
    isReadable()
    pause()
    resume()
    close()
    Events
    data, end, error, close
    Stream
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  42. WritableStream
    isWritable()
    write($data)
    end($data)
    close()
    Events
    drain, error, close, pipe
    Stream
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  43. WritableStream
    isWritable()
    write($data)
    end($data)
    close()
    Events
    drain, error, close, pipe
    Stream
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  44. Stream
    $source = new React\Stream\Stream(fopen('omg.txt', 'r'), $loop);
    $dest = new React\Stream\Stream(fopen('wtf.txt', 'w'), $loop);
    $source->pipe($dest);
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  45. Stream
    $a->pipe($b)->pipe($c);
    a | b | c
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  46. Socket
    $socket = new React\Socket\Server($loop);
    $socket->on('connection', function ($conn) {
    $conn->write("Hello there!\n");
    $conn->write("Welcome to this amazing server!\n");
    $conn->write("Here's a tip: don't say anything.\n");
    $conn->on('data', function ($data) use ($conn) {
    $conn->close();
    });
    });
    $socket->listen(1337);
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  47. Http
    $socket = new React\Socket\Server($loop);
    $http = new React\Http\Server($socket);
    $http->on('request', function ($request, $response) {
    $response->writeHead(200, ['Content-Type' => 'text/plain']);
    $response->end("Hello World!\n");
    });
    $socket->listen(1337);
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  48. Http
    $http = new React\Http\Server($socket);
    $http->on('request', function ($request, $response) {
    $response->writeHead(200, ['Content-Type' => 'text/plain']);
    $request->pipe($response);
    });
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  49. $waiting = null;
    $socket->on('connection', function ($conn) use (&$waiting) {
    if (null === $waiting || !$waiting->isReadable()) {
    $waiting = $conn;
    $conn->write("Please wait until a partner connects.\n");
    return;
    }
    $message = "You are now talking to %s.\n";
    $conn->write(sprintf($message, getConnectionId($waiting)));
    $waiting->write(sprintf($message, getConnectionId($conn)));
    $conn->pipe($waiting)->pipe($conn);
    $waiting = null;
    });
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  50. Saturday, October 6, 12

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  51. Saturday, October 6, 12

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  52. React in the industry:
    It’s like, so amazing, man.
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  53. Saturday, October 6, 12

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  54. Saturday, October 6, 12

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  55. Saturday, October 6, 12

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  56. Saturday, October 6, 12

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  57. Saturday, October 6, 12

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  58. Saturday, October 6, 12

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  59. React in the industry:
    It’s like, so amazing, man.
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  60. React in the industry:
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  61. React/ZMQ
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  62. $context = new React\ZMQ\Context($loop);
    $push = $context->getSocket(ZMQ::SOCKET_PUSH);
    $push->connect('tcp://127.0.0.1:5555');
    $push->send('hello');
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  63. $context = new React\ZMQ\Context($loop);
    $pull = $context->getSocket(ZMQ::SOCKET_PULL);
    $pull->bind('tcp://127.0.0.1:5555');
    $pull->on('message', function ($msg) {
    echo "Received: $msg\n";
    });
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  64. React/STOMP
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  65. React/Whois
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  66. Wisdom
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  67. Saturday, October 6, 12

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  68. $foo->get(function ($bar) {
    $bar->get(function ($baz) {
    $baz->get(function ($bazinga) {
    $bazinga->get(function () {
    throw new FuckItException();
    });
    });
    });
    });
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  69. React/Async
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  70. use React\Async\Util as Async;
    Async::waterfall([
    function ($callback) use ($foo) {
    $foo->get($callback);
    },
    function ($bar, $callback) {
    $bar->get($callback);
    },
    function ($baz, $callback) {
    $baz->get($callback);
    },
    function ($bazinga, $callback) {
    $bazinga->get($callback);
    },
    function ($callback) {
    throw new FuckItException();
    }
    ]);
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  71. React/Curry
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  72. use React\Curry\Util as Curry;
    $add = function ($a, $b) {
    return $a + $b;
    };
    $addOne = Curry::bind($add, 1);
    echo sprintf("%s\n", $addOne(5));
    // outputs 6
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  73. public function query($domain, $callback)
    {
    Async::waterfall(
    [
    Curry::bind([$this, 'resolveWhoisServer'], $domain),
    Curry::bind([$this, 'queryWhoisServer'], $domain),
    ],
    $callback
    );
    }
    public function resolveWhoisServer($domain, $callback)
    public function queryWhoisServer($domain, $ip, $callback)
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  74. React in the industry:
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  75. Ratchet
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  76. Predis/Async
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  77. $client->connect(function ($client) {
    $client->monitor(function ($event) {
    echo implode(' ', [
    "[{$event->timestamp}]",
    $event->command,
    $event->arguments,
    ]);
    echo "\n";
    });
    });
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  78. DNode-PHP
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  79. Huston we have a
    blocking call
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  80. DNS
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  81. Http Server
    Worker
    Client
    Worker
    Worker
    Client
    Client
    HTTP
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  82. Saturday, October 6, 12

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  83. Saturday, October 6, 12

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  84. Questions?
    • joind.in/6942
    • nodephp.org
    • @reactphp
    • @igorwesome
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  85. Saturday, October 6, 12

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