private function connect()
{
// If we're in the process of connecting already return that same promise
if ($this->connectPromisor) {
return $this->connectPromisor->promise();
}
// If a read watcher exists we know we're already connected
if ($this->readWatcher) {
return new Success($this);
}
$this->state = self::STATE_CONNECTING;
$this->connectPromisor = new Deferred();
$socketPromise = connect($this->uri, ["timeout" => $this->timeout]);
$onWrite = function ($watcherId) {
if ($this->outputBufferLength === 0) {
disable($watcherId);
return;
}
$bytes = @fwrite($this->socket, $this->outputBuffer);
if ($bytes === 0) {
$this->state = self::STATE_DISCONNECTED;
$this->onError(new ConnectException("Connection went away (write)", $code = 1));
} else {
$this->outputBuffer = (string) substr($this->outputBuffer, $bytes);
$this->outputBufferLength -= $bytes;
}
};
$socketPromise->when(function ($error, $socket) use($onWrite) {
$connectPromisor = $this->connectPromisor;
$this->connectPromisor = null;
if ($error) {
$this->state = self::STATE_DISCONNECTED;
$connectPromisor->fail(new ConnectException("Connection attempt failed", $code = 0, $error));
return;
}
$this->state = self::STATE_CONNECTED;
$this->socket = $socket;
foreach ($this->handlers["connect"] as $handler) {
$pipelinedCommand = $handler();
if (!empty($pipelinedCommand)) {
$this->outputBuffer = $pipelinedCommand . $this->outputBuffer;
$this->outputBufferLength += strlen($pipelinedCommand);
}
}
$this->readWatcher = onReadable($this->socket, function () {
$read = fread($this->socket, 8192);
if ($read != "") {
$this->parser->append($read);
} elseif (!is_resource($this->socket) || @feof($this->socket)) {
$this->state = self::STATE_DISCONNECTED;
$this->onError(new ConnectException("Connection went away (read)", $code = 2));
}
});
$this->writeWatcher = onWritable($this->socket, $onWrite, ["enable" => !empty($this->outputBuffer)]);
$connectPromisor->succeed();
});
return $this->connectPromisor->promise();
}
/**
* @return Promise
*/
private function connect()
{
if ($this->promisor) {
return $this->promisor->promise();
}
// Already connected
if (is_resource($this->socket)) {
return new Success();
}
$this->promisor = new \Amp\Deferred();
/** @var $socketPromise Promise */
$socketPromise = \Amp\Socket\connect($this->uri, ['timeout' => 1000]);
$socketPromise->when(function ($error, $socket) {
$promisor = $this->promisor;
$this->promisor = null;
$this->socket = $socket;
$this->reader = \Amp\onReadable($this->socket, [$this, "onRead"]);
$this->writer = \Amp\onWritable($this->socket, [$this, "onWrite"]);
$promisor->succeed();
});
return $this->promisor->promise();
}
