3 * A socket discovery class
5 * @author Roland Haeder <webmaster@ship-simu.org>
7 * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009, 2010 Core Developer Team
8 * @license GNU GPL 3.0 or any newer version
9 * @link http://www.ship-simu.org
11 * This program is free software: you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation, either version 3 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 class PackageSocketDiscovery extends BaseHubDiscovery implements DiscoverableSocket, Registerable {
26 * Protected constructor
30 protected function __construct () {
31 // Call parent constructor
32 parent::__construct(__CLASS__);
36 * Create an instance of this class
38 * @return $discoveryInstance An instance of this discovery class
40 public static final function createPackageSocketDiscovery () {
41 // Get an instance of this class
42 $discoveryInstance = new PackageSocketDiscovery();
44 // Output debug message
45 $discoveryInstance->debugOutput('SOCKET-DISCOVERY: Initialized.');
47 // Return the prepared instance
48 return $discoveryInstance;
52 * Tries to dicover the right listener instance
54 * @param $protocolName Protocol name
55 * @param $packageData Raw package data
56 * @return $listenerInstance An instance of a Listenable instance or null
58 public function discoverListenerInstance ($protocolName, array $packageData) {
60 * Get the listener pool instance, we need to lookup the matching
61 * listener->poolInstance chain there.
63 $poolInstance = Registry::getRegistry()->getInstance('node')->getListenerPoolInstance();
65 // Init listener instance
66 $listenerInstance = null;
69 * Now we need to choose again. It is wether we are speaking with a hub
70 * or with a client. So just handle it over to all listeners in this
73 foreach ($poolInstance->getPoolEntriesInstance()->getArrayFromGroup($protocolName) as $listenerInstance) {
74 // Does the listener want that package?
75 if ($listenerInstance->ifListenerAcceptsPackageData($packageData)) {
76 // This listener likes our package data, so abort here
82 return $listenerInstance;
86 * Tries to discover the right socket for given package data and returns a
87 * matching socket resource for that protocol.
89 * @param $packageData Raw package data array
90 * @return $socketResource A valid socket resource
91 * @throws NoListGroupException If the procol group is not found in peer list
93 public function discoverSocket (array $packageData) {
94 // Determine protocol name
95 $protocolName = $this->determineProtocolByPackageData($packageData);
97 // Get the listener instance
98 $listenerInstance = $this->discoverListenerInstance($protocolName, $packageData);
100 // If there is no listener who wants to have that package, we simply drop it here
101 if (is_null($listenerInstance)) {
102 // @TODO We may need some locking here
103 // Abort with no resource
108 * Now we have the listener instance, we can determine the right
109 * resource to continue. The first step is to get the attached pool
110 * instance and pass over the whole package data to get the right
113 $socketResource = $listenerInstance->getPoolInstance()->getSocketFromPackageData($packageData);
115 // Is it false, the recipient isn't known to us and we have no connection to it
116 if (!is_resource($socketResource)) {
117 // Create a new socket resource
118 $socketResource = SocketFactory::createSocketFromPackageData($packageData, $protocolName);
122 return $socketResource;