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<?php |
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namespace WyriHaximus\React\ChildProcess\Messenger; |
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use React\ChildProcess\Process; |
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use React\EventLoop\LoopInterface; |
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use React\Promise\FulfilledPromise; |
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use React\Stream\Stream; |
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use React\Stream\Util; |
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use WyriHaximus\React\ChildProcess\Messenger\Messages\Factory as MessengesFactory; |
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use WyriHaximus\React\ChildProcess\Messenger\Messages\Payload; |
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class Factory |
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{ |
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const INTERVAL = 0.1; |
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const TIMEOUT = 13; |
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const TERMINATE_TIMEOUT = 1; |
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const PROCESS_REGISTER = 'wyrihaximus.react.child-process.messenger.child.register'; |
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/** |
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* @param Process $process |
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* @param LoopInterface $loop |
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* @param array $options |
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* @param float $interval |
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* @return \React\Promise\PromiseInterface |
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*/ |
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public static function parent( |
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Process $process, |
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LoopInterface $loop, |
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array $options = [], |
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$interval = self::INTERVAL |
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) { |
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$process->start($loop, $interval); |
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return \WyriHaximus\React\tickingPromise($loop, $interval, [$process, 'isRunning'])-> |
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then(function () use ($process, $options) { |
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$messenger = new Messenger($process->stdin, $process->stdout, $process->stderr, [ |
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'read_err' => 'stderr', |
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'read' => 'stdout', |
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'write' => 'stdin', |
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'callForward' => function ($name, $arguments) use ($process) { |
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return call_user_func_array([$process, $name], $arguments); |
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}, |
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] + $options); |
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Util::forwardEvents($process, $messenger, [ |
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'exit', |
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]); |
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return \React\Promise\resolve($messenger); |
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}) |
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; |
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} |
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/** |
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* @param LoopInterface $loop |
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* @param array $options |
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* @param null $termiteCallable |
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* @return Messenger |
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*/ |
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public static function child(LoopInterface $loop, array $options = [], $termiteCallable = null) |
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{ |
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$stdin = new Stream(STDIN, $loop); |
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$stdout = new Stream(STDOUT, $loop); |
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$stderr = new Stream(STDERR, $loop); |
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$messenger = new Messenger($stdin, $stdout, $stderr, [ |
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'read' => 'stdin', |
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'write_err' => 'stderr', |
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'write' => 'stdout', |
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] + $options); |
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$closeNStop = function () use ($loop) { |
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$loop->stop(); |
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}; |
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$stdin->on('close', $closeNStop); |
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$stdout->on('close', $closeNStop); |
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$stderr->on('close', $closeNStop); |
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if ($termiteCallable === null) { |
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$termiteCallable = function () use ($loop) { |
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$loop->addTimer( |
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self::TERMINATE_TIMEOUT, |
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[ |
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$loop, |
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'stop', |
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] |
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); |
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}; |
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} |
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$messenger->registerRpc( |
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Messenger::TERMINATE_RPC, |
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function (Payload $payload, Messenger $messenger) use ($loop, $termiteCallable) { |
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$messenger->emit('terminate', [ |
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$messenger, |
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]); |
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$termiteCallable($payload, $messenger); |
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return new FulfilledPromise([]); |
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} |
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); |
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return $messenger; |
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} |
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/** |
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* @param string $className |
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* @param LoopInterface $loop |
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* @param array $options |
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* @param float $interval |
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* @throws \Exception |
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* @return \React\Promise\PromiseInterface |
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*/ |
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public static function parentFromClass( |
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$className, |
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LoopInterface $loop, |
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array $options = [], |
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$interval = self::INTERVAL |
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) { |
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if (!is_subclass_of($className, 'WyriHaximus\React\ChildProcess\Messenger\ChildInterface')) { |
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throw new \Exception('Given class doesn\'t implement ChildInterface'); |
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} |
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$template = '%s'; |
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if (isset($options['cmdTemplate'])) { |
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$template = $options['cmdTemplate']; |
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unset($options['cmdTemplate']); |
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} |
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$command = PHP_BINARY . ' ' . __DIR__ . DIRECTORY_SEPARATOR . 'child-process.php'; |
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$process = new Process( |
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sprintf( |
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$template, |
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$command . ' ' . ArgvEncoder::encode($options) |
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) |
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); |
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return static::parent( |
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$process, |
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$loop, |
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$options, |
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$interval |
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)->then(function (Messenger $messenger) use ($className) { |
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return $messenger->rpc(MessengesFactory::rpc(Factory::PROCESS_REGISTER, [ |
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'className' => $className, |
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]))->then(function () use ($messenger) { |
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return \React\Promise\resolve($messenger); |
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}); |
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}); |
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} |
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} |
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WyriHaximus /
reactphp-child-process-messenger
Let’s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let’s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: