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<?php
namespace React\Socket;
/**
* The `ConnectorInterface` is responsible for providing an interface for
* establishing streaming connections, such as a normal TCP/IP connection.
*
* This is the main interface defined in this package and it is used throughout
* React's vast ecosystem.
*
* Most higher-level components (such as HTTP, database or other networking
* service clients) accept an instance implementing this interface to create their
* TCP/IP connection to the underlying networking service.
* This is usually done via dependency injection, so it's fairly simple to actually
* swap this implementation against any other implementation of this interface.
*
* The interface only offers a single `connect()` method.
*
* @see ConnectionInterface
*/
interface ConnectorInterface
{
/**
* Creates a streaming connection to the given remote address
*
* If returns a Promise which either fulfills with a stream implementing
* `ConnectionInterface` on success or rejects with an `Exception` if the
* connection is not successful.
*
* ```php
* $connector->connect('google.com:443')->then(
* function (React\Socket\ConnectionInterface $connection) {
* // connection successfully established
* },
* function (Exception $error) {
* // failed to connect due to $error
* }
* );
* ```
*
* The returned Promise MUST be implemented in such a way that it can be
* cancelled when it is still pending. Cancelling a pending promise MUST
* reject its value with an Exception. It SHOULD clean up any underlying
* resources and references as applicable.
*
* ```php
* $promise = $connector->connect($uri);
*
* $promise->cancel();
* ```
*
* @param string $uri
* @return \React\Promise\PromiseInterface resolves with a stream implementing ConnectionInterface on success or rejects with an Exception on error
* @see ConnectionInterface
*/
public function connect($uri);
}