3 * A general hub node class
5 * @author Roland Haeder <webmaster@ship-simu.org>
7 * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 Hub 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 BaseHubNode extends BaseFrameworkSystem implements Updateable {
31 * IP/port number of bootstrapping node
33 private $bootIpPort = '';
36 * Query connector instance
38 private $queryInstance = null;
41 * Protected constructor
43 * @param $className Name of the class
46 protected function __construct ($className) {
47 // Call parent constructor
48 parent::__construct($className);
51 $this->removeNumberFormaters();
52 $this->removeSystemArray();
58 * @param $nodeId Our new node id
61 private final function setNodeId ($nodeId) {
62 $this->nodeId = (string) $nodeId;
68 * @return $nodeId Our new node id
70 private final function getNodeId () {
75 * Checks wether the given IP address matches one of the bootstrapping nodes
77 * @param $remoteAddr IP address to checkout against our bootstrapping list
78 * @return $isFound Wether the IP is found
80 protected function ifAddressMatchesBootstrappingNodes ($remoteAddr) {
81 // By default nothing is found
84 // Run through all configured IPs
85 foreach (explode(',', $this->getConfigInstance()->readConfig('hub_bootstrap_nodes')) as $ipPort) {
86 // Split it up in IP/port
87 $ipPortArray = explode(':', $ipPort);
90 if ($ipPortArray[0] == $remoteAddr) {
94 // Remember the port number
95 $this->bootIpPort = $ipPort;
98 $this->getDebugInstance()->output(__FUNCTION__.'['.__LINE__.']: IP matches remote address ' . $ipPort . '.');
100 // Stop further searching
102 } elseif ($ipPortArray[0] == $this->getConfigInstance()->readConfig('node_listen_addr')) {
103 // IP matches listen address. At this point we really don't care
104 // if we can also listen on that address!
107 // Remember the port number
108 $this->bootIpPort = $ipPort;
111 $this->getDebugInstance()->output(__FUNCTION__.'['.__LINE__.']: IP matches listen address ' . $ipPort . '.');
113 // Stop further searching
123 * Outputs the console teaser. This should only be executed on startup or
124 * full restarts. This method generates some space around the teaser.
128 public function outputConsoleTeaser () {
129 // Get the app instance (for shortening our code)
130 $app = $this->getApplicationInstance();
133 $this->getDebugInstance()->output(' ');
134 $this->getDebugInstance()->output($app->getAppName() . ' v' . $app->getAppVersion() . ' - ' . $this->getRequestInstance()->getRequestElement('mode') . ' mode active');
135 $this->getDebugInstance()->output('Copyright (c) 2007 - 2008 Roland Haeder, 2009 Hub Developer Team');
136 $this->getDebugInstance()->output(' ');
137 $this->getDebugInstance()->output('This program comes with ABSOLUTELY NO WARRANTY; for details see docs/COPYING.');
138 $this->getDebugInstance()->output('This is free software, and you are welcome to redistribute it under certain');
139 $this->getDebugInstance()->output('conditions; see docs/COPYING for details.');
140 $this->getDebugInstance()->output(' ');
144 * Do generic things for bootup phase. This can be e.g. checking if the
145 * right node mode is selected for this hub's IP number.
148 * @todo This method is maybe not yet finished.
150 protected function doGenericBootstrapping () {
151 // --------------------- Hub-id acquirement phase ---------------------
152 // Acquire a hub-id. This step generates on first launch a new one and
153 // on any later launches it will restore the hub-id from the database.
154 // A passed 'nickname=xxx' argument will be used to add some
155 // 'personality' to the hub.
156 $this->bootstrapAcquireHubId();
158 // ------------------- More generic bootstrap steps -------------------
159 // Generate the session id which will only be stored in RAM
160 $this->bootstrapGenerateSessionId();
162 // Restore a previously downloaded bootstrap-node list
163 $this->bootstrapRestoreNodeList();
165 // Download or update the bootstrap-node list
166 $this->bootstrapDownloadNodeList();
168 // @TODO Add some generic bootstrap steps
169 $this->partialStub('Add some generic bootstrap steps here.');
173 * Generic method to acquire a hub-id. On first run this generates a new one
174 * based on many pseudo-random data. On any later run, unless the id
175 * got not removed from database, it will be restored from the database.
179 private function bootstrapAcquireHubId () {
180 // Get a wrapper instance
181 $wrapperInstance = ObjectFactory::createObjectByConfiguredName('node_info_db_wrapper_class');
183 // Now get a search criteria instance
184 $searchInstance = ObjectFactory::createObjectByConfiguredName('search_criteria_class');
186 // Search for the node number zero which is hard-coded the default
187 $searchInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_NR, 1);
188 $searchInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_TYPE, $this->getRequestInstance()->getRequestElement('mode'));
189 $searchInstance->setLimit(1);
192 $resultInstance = $wrapperInstance->doSelectByCriteria($searchInstance);
195 if ($resultInstance->next()) {
196 // Save the result instance in this class
197 $this->setResultInstance($resultInstance);
199 // Get the node id from result and set it
200 $this->setNodeId($this->getField(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_ID));
203 $this->getDebugInstance()->output('BOOTSTRAP: Re-using found node-id: ' . $this->getNodeId() . '');
205 // Get an RNG instance (Random Number Generator)
206 $rngInstance = ObjectFactory::createObjectByConfiguredName('rng_class');
208 // Generate a pseudo-random string
209 $randomString = $rngInstance->randomString(255) . ':' . $this->getRequestInstance()->getRequestElement('mode');
211 // Get a crypto instance
212 $cryptoInstance = ObjectFactory::createObjectByConfiguredName('crypto_class');
214 // Hash and encrypt the string so we become a "node id" aka Hub-Id
215 $this->setNodeId($cryptoInstance->hashString($cryptoInstance->encryptString($randomString)));
217 // Register the node id with our wrapper
218 $wrapperInstance->registerNodeId($this, $this->getRequestInstance());
221 $this->getDebugInstance()->output('BOOTSTRAP: Created new node-id: ' . $this->getNodeId() . '');
226 * Initializes queues which every node needs
230 protected function initGenericQueues () {
232 $this->queryInstance = ObjectFactory::createObjectByConfiguredName('query_connector_class', array($this));
236 * Adds hub data elements to a given dataset instance
238 * @param $criteriaInstance An instance of a storeable criteria
239 * @param $requestInstance An instance of a Requestable class
242 public function addElementsToDataSet (StoreableCriteria $criteriaInstance, Requestable $requestInstance) {
243 // Add node number and type
244 $criteriaInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_NR, 1);
245 $criteriaInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_TYPE, $requestInstance->getRequestElement('mode'));
248 $criteriaInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_ID, $this->getNodeId());
252 * Updates a given field with new value
254 * @param $fieldName Field to update
255 * @param $fieldValue New value to store
257 * @throws DatabaseUpdateSupportException If this class does not support database updates
258 * @todo Try to make this method more generic so we can move it in BaseFrameworkSystem
260 public function updateDatabaseField ($fieldName, $fieldValue) {
262 $this->partialStub('Unfinished!');
265 // Get a critieria instance
266 $searchInstance = ObjectFactory::createObjectByConfiguredName('search_criteria_class');
268 // Add search criteria
269 $searchInstance->addCriteria(UserDatabaseWrapper::DB_COLUMN_USERNAME, $this->getUserName());
270 $searchInstance->setLimit(1);
272 // Now get another criteria
273 $updateInstance = ObjectFactory::createObjectByConfiguredName('update_criteria_class');
275 // Add criteria entry which we shall update
276 $updateInstance->addCriteria($fieldName, $fieldValue);
278 // Add the search criteria for searching for the right entry
279 $updateInstance->setSearchInstance($searchInstance);
281 // Set wrapper class name
282 $updateInstance->setWrapperConfigEntry('user_db_wrapper_class');
284 // Remember the update in database result
285 $this->getResultInstance()->add2UpdateQueue($updateInstance);