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libphutil/src/phage/agent/PhagePHPAgent.php
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PhagePHPAgent.php
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<?php
final class PhagePHPAgent {
private $stdin;
private $master;
private $exec = array();
public function __construct($stdin) {
$this->stdin = $stdin;
}
public function execute() {
while (true) {
if ($this->exec) {
$iterator = new FutureIterator($this->exec);
$iterator->setUpdateInterval(0.050);
foreach ($iterator as $key => $future) {
if ($future === null) {
break;
}
$this->resolveFuture($key, $future);
break;
}
} else {
PhutilChannel::waitForAny(array($this->getMaster()));
}
$this->processInput();
}
}
private function getMaster() {
if (!$this->master) {
$raw_channel = new PhutilSocketChannel(
$this->stdin,
fopen('php://stdout', 'w'));
$json_channel = new PhutilJSONProtocolChannel($raw_channel);
$this->master = $json_channel;
}
return $this->master;
}
private function processInput() {
$channel = $this->getMaster();
$open = $channel->update();
if (!$open) {
throw new Exception("Channel closed!");
}
while (true) {
$command = $channel->read();
if ($command === null) {
break;
}
$this->processCommand($command);
}
}
private function processCommand(array $spec) {
switch ($spec['type']) {
case 'EXEC':
$key = $spec['key'];
$cmd = $spec['command'];
$future = new ExecFuture('%C', $cmd);
$this->exec[$key] = $future;
break;
case 'EXIT':
$this->terminateAgent();
break;
}
}
private function resolveFuture($key, Future $future) {
$result = $future->resolve();
$master = $this->getMaster();
$master->write(
array(
'type' => 'RSLV',
'key' => $key,
'err' => $result[0],
'stdout' => $result[1],
'stderr' => $result[2],
));
}
public function __destruct() {
$this->terminateAgent();
}
private function terminateAgent() {
foreach ($this->exec as $key => $future) {
$future->resolveKill();
}
exit(0);
}
}
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