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<?php |
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declare(strict_types=1); |
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namespace Ivory\Connection; |
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use Ivory\Exception\ConnectionException; |
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class IPCControl implements IIPCControl |
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{ |
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private $connCtl; |
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private $stmtExec; |
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public function __construct(ConnectionControl $connCtl, IStatementExecution $stmtExec) |
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{ |
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$this->connCtl = $connCtl; |
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$this->stmtExec = $stmtExec; |
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} |
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public function getBackendPID(): int |
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{ |
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$handler = $this->connCtl->requireConnection(); |
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return pg_get_pid($handler); |
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} |
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public function notify(string $channel, ?string $payload = null): void |
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{ |
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if ($payload === null) { |
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$this->stmtExec->command('NOTIFY %ident', $channel); |
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} else { |
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$this->stmtExec->command('NOTIFY %ident, %s', $channel, $payload); |
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} |
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} |
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public function listen(string $channel): void |
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{ |
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$this->stmtExec->command('LISTEN %ident', $channel); |
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} |
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public function unlisten(string $channel): void |
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{ |
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$this->stmtExec->command('UNLISTEN %ident', $channel); |
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} |
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public function unlistenAll(): void |
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{ |
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$this->stmtExec->rawCommand('UNLISTEN *'); |
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} |
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public function pollNotification(): ?Notification |
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{ |
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$handler = $this->connCtl->requireConnection(); |
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$res = pg_get_notify($handler, PGSQL_ASSOC); |
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if ($res === false) { |
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return null; |
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} |
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$payload = ($res['payload'] !== '' ? $res['payload'] : null); |
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return new Notification($res['message'], $res['pid'], $payload); |
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} |
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public function waitForNotification(int $millisecondTimeout): ?Notification |
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{ |
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$notification = $this->pollNotification(); |
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if ($notification !== null) { |
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return $notification; |
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} |
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$handler = $this->connCtl->requireConnection(); |
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$socket = pg_socket($handler); |
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if (!$socket) { |
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throw new ConnectionException('Error retrieving the connection socket while trying to wait for notifications'); |
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} |
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$timeoutSec = (int)($millisecondTimeout / 1000); |
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$timeoutMicrosec = ($millisecondTimeout % 1000) * 1000; |
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$r = [$socket]; |
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$w = []; |
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$ex = []; |
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$selected = stream_select($r, $w, $ex, $timeoutSec, $timeoutMicrosec); |
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if ($selected > 0) { |
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return $this->pollNotification(); |
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} elseif ($selected === 0) { |
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return null; |
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} else { |
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throw new ConnectionException('Error selecting the stream while waiting for notifications'); |
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} |
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} |
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} |
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ondrej-bouda /
ivory
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