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<?php |
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namespace AsyncPHP\Icicle\Database\Connector; |
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use AsyncPHP\Doorman\Handler; |
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use AsyncPHP\Doorman\Task; |
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use AsyncPHP\Remit\Client; |
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use AsyncPHP\Remit\Client\ZeroMqClient; |
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use AsyncPHP\Remit\Location\InMemoryLocation; |
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use AsyncPHP\Remit\Server; |
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use AsyncPHP\Remit\Server\ZeroMqServer; |
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use Aura\Sql\ExtendedPdo; |
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use Icicle\Loop; |
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use PDO; |
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final class DoormanConnectorHandler implements Handler |
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{ |
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/** |
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* @inheritdoc |
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* |
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* @param Task $task |
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*/ |
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public function handle(Task $task) |
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{ |
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$config = $task->getData(); |
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if ($config["driver"] === "mysql") { |
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$config += [ |
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"host" => "127.0.0.1", |
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"port" => 3306, |
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"charset" => "utf8", |
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"socket" => null, |
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]; |
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} |
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if ($config["remit"]["driver"] === "zeromq") { |
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$config["remit"]["server"] += [ |
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"host" => "127.0.0.1", |
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]; |
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$config["remit"]["client"] += [ |
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"host" => "127.0.0.1", |
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]; |
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$server = new ZeroMqServer( |
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new InMemoryLocation( |
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$config["remit"]["client"]["host"], |
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$config["remit"]["client"]["port"] |
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) |
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); |
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$client = new ZeroMqClient( |
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new InMemoryLocation( |
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$config["remit"]["server"]["host"], |
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$config["remit"]["server"]["port"] |
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) |
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); |
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} |
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$connection = new ExtendedPdo( |
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new PDO($this->newConnectionString($config), $config["username"], $config["password"]) |
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); |
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$server->addListener("q", function ($query, $values, $id) use ($client, $connection) { |
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$client->emit("r", [$connection->fetchAll($query, $values), $id]); |
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}); |
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$server->addListener("d", function () use ($connection, $server, $client) { |
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$client->emit("dd"); |
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try { |
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$connection->disconnect(); |
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} catch (Exception $exception) { |
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// TODO: find an elegant way to deal with this |
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} |
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$server->disconnect(); |
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$client->disconnect(); |
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Loop\stop(); |
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}); |
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Loop\periodic(0, function () use ($server) { |
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$server->tick(); |
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}); |
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Loop\run(); |
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} |
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/** |
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* Returns a new dsn string, for PDO to connect to the database with. |
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* |
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* @param array $config |
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* |
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* @return string |
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*/ |
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private function newConnectionString(array $config) |
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{ |
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if ($config["driver"] === "mysql") { |
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return "mysql:host={$config['host']};port={$config['port']};dbname={$config['schema']};unix_socket={$config['socket']};charset={$config['charset']}"; |
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} |
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if ($config["driver"] === "pgsql") { |
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return "pgsql:host={$config['host']};port={$config['port']};dbname={$config['schema']}"; |
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} |
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if ($config["driver"] === "sqlite") { |
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return "sqlite:{$config['file']}"; |
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} |
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if ($config["driver"] === "sqlsrv") { |
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return "sqlsrv:Server={$config['host']},{$config['port']};Database={$config['schema']}"; |
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} |
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} |
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} |
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If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: