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 BaseHubSystem implements Updateable {
31 * IP/port number of bootstrapping node
33 private $bootIpPort = '';
36 * Query connector instance
38 private $queryInstance = null;
41 * Listener pool instance
43 private $listenerPoolInstance = null;
46 * Wether the hub is active (true/false)
48 private $hubIsActive = false;
51 * Protected constructor
53 * @param $className Name of the class
56 protected function __construct ($className) {
57 // Call parent constructor
58 parent::__construct($className);
64 * @param $nodeId Our new node id
67 private final function setNodeId ($nodeId) {
68 $this->nodeId = (string) $nodeId;
74 * @return $nodeId Our new node id
76 private final function getNodeId () {
81 * Setter for query instance
83 * @param $queryInstance Our new query instance
86 private final function setQueryInstance (Queryable $queryInstance) {
87 $this->queryInstance = $queryInstance;
91 * Getter for query instance
93 * @return $queryInstance Our new query instance
95 protected final function getQueryInstance () {
96 return $this->queryInstance;
100 * Checks wether the given IP address matches one of the bootstrapping nodes
102 * @param $remoteAddr IP address to checkout against our bootstrapping list
103 * @return $isFound Wether the IP is found
105 protected function ifAddressMatchesBootstrappingNodes ($remoteAddr) {
106 // By default nothing is found
109 // Run through all configured IPs
110 foreach (explode(',', $this->getConfigInstance()->readConfig('hub_bootstrap_nodes')) as $ipPort) {
111 // Split it up in IP/port
112 $ipPortArray = explode(':', $ipPort);
115 if ($ipPortArray[0] == $remoteAddr) {
119 // Remember the port number
120 $this->bootIpPort = $ipPort;
123 $this->debugOutput('BOOTSTRAP: ' . __FUNCTION__ . '[' . __LINE__ . ']: IP matches remote address ' . $ipPort . '.');
125 // Stop further searching
127 } elseif ($ipPortArray[0] == $this->getConfigInstance()->readConfig('node_listen_addr')) {
128 // IP matches listen address. At this point we really don't care
129 // if we can also listen on that address!
132 // Remember the port number
133 $this->bootIpPort = $ipPort;
136 $this->debugOutput('BOOTSTRAP: ' . __FUNCTION__ . '[' . __LINE__ . ']: IP matches listen address ' . $ipPort . '.');
138 // Stop further searching
148 * Outputs the console teaser. This should only be executed on startup or
149 * full restarts. This method generates some space around the teaser.
153 public function outputConsoleTeaser () {
154 // Get the app instance (for shortening our code)
155 $app = $this->getApplicationInstance();
158 $this->debugOutput(' ');
159 $this->debugOutput($app->getAppName() . ' v' . $app->getAppVersion() . ' - ' . $this->getRequestInstance()->getRequestElement('mode') . ' mode active');
160 $this->debugOutput('Copyright (c) 2007 - 2008 Roland Haeder, 2009 Hub Developer Team');
161 $this->debugOutput(' ');
162 $this->debugOutput('This program comes with ABSOLUTELY NO WARRANTY; for details see docs/COPYING.');
163 $this->debugOutput('This is free software, and you are welcome to redistribute it under certain');
164 $this->debugOutput('conditions; see docs/COPYING for details.');
165 $this->debugOutput(' ');
169 * Do generic things for bootup phase. This can be e.g. checking if the
170 * right node mode is selected for this hub's IP number.
173 * @todo This method is maybe not yet finished.
175 protected function bootstrapGenericBootstrapping () {
176 // --------------------- Hub-id acquirement phase ---------------------
177 // Acquire a hub-id. This step generates on first launch a new one and
178 // on any later launches it will restore the hub-id from the database.
179 // A passed 'nickname=xxx' argument will be used to add some
180 // 'personality' to the hub.
181 $this->bootstrapAcquireHubId();
183 // ------------------- More generic bootstrap steps -------------------
184 // Generate the session id which will only be stored in RAM and kept for
185 // the whole "session".
186 $this->bootstrapGenerateSessionId();
188 // Restore a previously downloaded bootstrap-node list.
189 $this->bootstrapRestoreNodeList();
191 // @TODO Add some generic bootstrap steps
192 $this->partialStub('Add some generic bootstrap steps here.');
196 * Generic method to acquire a hub-id. On first run this generates a new one
197 * based on many pseudo-random data. On any later run, unless the id
198 * got not removed from database, it will be restored from the database.
202 private function bootstrapAcquireHubId () {
203 // Get a wrapper instance
204 $wrapperInstance = ObjectFactory::createObjectByConfiguredName('node_info_db_wrapper_class');
206 // Now get a search criteria instance
207 $searchInstance = ObjectFactory::createObjectByConfiguredName('search_criteria_class');
209 // Search for the node number zero which is hard-coded the default
210 $searchInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_NR, 1);
211 $searchInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_TYPE, $this->getRequestInstance()->getRequestElement('mode'));
212 $searchInstance->setLimit(1);
215 $resultInstance = $wrapperInstance->doSelectByCriteria($searchInstance);
218 if ($resultInstance->next()) {
219 // Save the result instance in this class
220 $this->setResultInstance($resultInstance);
222 // Get the node id from result and set it
223 $this->setNodeId($this->getField(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_ID));
226 $this->debugOutput('BOOTSTRAP: Re-using found node-id: ' . $this->getNodeId() . '');
228 // Get an RNG instance (Random Number Generator)
229 $rngInstance = ObjectFactory::createObjectByConfiguredName('rng_class');
231 // Generate a pseudo-random string
232 $randomString = $rngInstance->randomString(255) . ':' . $this->getRequestInstance()->getRequestElement('mode');
234 // Get a crypto instance
235 $cryptoInstance = ObjectFactory::createObjectByConfiguredName('crypto_class');
237 // Hash and encrypt the string so we become a "node id" aka Hub-Id
238 $this->setNodeId($cryptoInstance->hashString($cryptoInstance->encryptString($randomString)));
240 // Register the node id with our wrapper
241 $wrapperInstance->registerNodeId($this, $this->getRequestInstance());
244 $this->debugOutput('BOOTSTRAP: Created new node-id: ' . $this->getNodeId() . '');
249 * Getter for boot IP/port combination
251 * @return $bootIpPort The IP/port combination of the boot node
253 protected final function getBootIpPort () {
254 return $this->bootIpPort;
258 * Initializes queues which every node needs
262 protected function initGenericQueues () {
263 // Set the query connector instance
264 $this->setQueryInstance(ObjectFactory::createObjectByConfiguredName('query_connector_class', array($this)));
267 $this->getQueryInstance()->doTestQuery();
271 * Adds hub data elements to a given dataset instance
273 * @param $criteriaInstance An instance of a storeable criteria
274 * @param $requestInstance An instance of a Requestable class
277 public function addElementsToDataSet (StoreableCriteria $criteriaInstance, Requestable $requestInstance) {
278 // Add node number and type
279 $criteriaInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_NR, 1);
280 $criteriaInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_TYPE, $requestInstance->getRequestElement('mode'));
283 $criteriaInstance->addCriteria(NodeInformationDatabaseWrapper::DB_COLUMN_NODE_ID, $this->getNodeId());
287 * Updates a given field with new value
289 * @param $fieldName Field to update
290 * @param $fieldValue New value to store
292 * @throws DatabaseUpdateSupportException If this class does not support database updates
293 * @todo Try to make this method more generic so we can move it in BaseFrameworkSystem
295 public function updateDatabaseField ($fieldName, $fieldValue) {
297 $this->partialStub('Unfinished!');
300 // Get a critieria instance
301 $searchInstance = ObjectFactory::createObjectByConfiguredName('search_criteria_class');
303 // Add search criteria
304 $searchInstance->addCriteria(UserDatabaseWrapper::DB_COLUMN_USERNAME, $this->getUserName());
305 $searchInstance->setLimit(1);
307 // Now get another criteria
308 $updateInstance = ObjectFactory::createObjectByConfiguredName('update_criteria_class');
310 // Add criteria entry which we shall update
311 $updateInstance->addCriteria($fieldName, $fieldValue);
313 // Add the search criteria for searching for the right entry
314 $updateInstance->setSearchInstance($searchInstance);
316 // Set wrapper class name
317 $updateInstance->setWrapperConfigEntry('user_db_wrapper_class');
319 // Remember the update in database result
320 $this->getResultInstance()->add2UpdateQueue($updateInstance);
324 * Getter for $hubIsActive attribute
326 * @return $hubIsActive Wether the hub is activer
328 public final function isHubActive () {
329 return $this->hubIsActive;
333 * Activates the hub by doing some final preparation and setting
334 * $hubIsActive to true
338 public function activateHub () {
339 // Checks wether a listener is still active and shuts it down if one
340 // is still listening
341 if (($this->determineIfListenerIsActive()) && ($this->isHubActive())) {
342 // Shutdown them down before they can hurt anything
343 $this->shutdownListenerPool();
346 // Initialize the TCP/UDP listener pool
347 $this->initializeListenerPool();
349 // @TODO Do some final preparation
350 $this->partialStub('Do some final preparation before the hub gots activated.');
352 // ----------------------- Last step from here ------------------------
353 // Activate the hub. This is ALWAYS the last step in this method
354 $this->hubIsActive = true;
355 // ---------------------- Last step until here ------------------------
359 * Initializes the listener pool (class)
363 private function initializeListenerPool () {
364 // Get a new pool instance
365 $this->listenerPoolInstance = ObjectFactory::createObjectByConfiguredName('listener_pool_class', array($this));
367 // Get an instance of the low-level listener
368 $listenerInstance = ObjectFactory::createObjectByConfiguredName('tcp_listener_class', array($this));
370 // Setup address and port
371 $listenerInstance->setListenAddressByConfiguration('node_listen_addr');
372 $listenerInstance->setListenPortByConfiguration('node_tcp_listen_port');
374 // Initialize the listener
375 $listenerInstance->initListener();
377 // Get a decorator class
378 $decoratorInstance = ObjectFactory::createObjectByConfiguredName('hub_tcp_listener_class', array($listenerInstance));
380 // Add this listener to the pool
381 $this->listenerPoolInstance->addListener($decoratorInstance);
383 // Get a decorator class
384 $decoratorInstance = ObjectFactory::createObjectByConfiguredName('client_tcp_listener_class', array($listenerInstance));
386 // Add this listener to the pool
387 $this->listenerPoolInstance->addListener($decoratorInstance);
389 // Get an instance of the low-level listener
390 $listenerInstance = ObjectFactory::createObjectByConfiguredName('udp_listener_class', array($this));
392 // Setup address and port
393 $listenerInstance->setListenAddressByConfiguration('node_listen_addr');
394 $listenerInstance->setListenPortByConfiguration('node_udp_listen_port');
396 // Initialize the listener
397 $listenerInstance->initListener();
399 // Get a decorator class
400 $decoratorInstance = ObjectFactory::createObjectByConfiguredName('hub_udp_listener_class', array($listenerInstance));
402 // Add this listener to the pool
403 $this->listenerPoolInstance->addListener($decoratorInstance);
405 // Get a decorator class
406 $decoratorInstance = ObjectFactory::createObjectByConfiguredName('client_udp_listener_class', array($listenerInstance));
408 // Add this listener to the pool
409 $this->listenerPoolInstance->addListener($decoratorInstance);