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   1 <?php
   2 // Own namespace
   3 namespace Org\Shipsimu\Hub\Handler\Node\Message\Announcement;
   4
   5 // Import application-specific stuff
   6 use Org\Shipsimu\Hub\Database\Frontend\Node\Dht\NodeDistributedHashTableDatabaseFrontend;
   7 use Org\Shipsimu\Hub\Factory\Node\NodeObjectFactory;
   8 use Org\Shipsimu\Hub\Generic\BaseHubSystem;
   9 use Org\Shipsimu\Hub\Handler\Message\BaseMessageHandler;
  10 use Org\Shipsimu\Hub\Handler\Message\HandleableMessage;
  11 use Org\Shipsimu\Hub\Network\Message\DeliverableMessage;
  12 use Org\Shipsimu\Hub\Network\Receive\Receivable;
  13 use Org\Shipsimu\Hub\Template\Engine\Xml\Announcement\XmlAnnouncementTemplateEngine;
  14 use Org\Shipsimu\Hub\Template\Engine\Xml\Answer\Announcement\XmlAnnouncementAnswerTemplateEngine;
  15
  16 // Import framework stuff
  17 use Org\Mxchange\CoreFramework\Bootstrap\FrameworkBootstrap;
  18 use Org\Mxchange\CoreFramework\Criteria\Storing\StoreableCriteria;
  19 use Org\Mxchange\CoreFramework\Registry\Registerable;
  20
  21 /**
  22  * A NodeMessageAnnouncement handler
  23  *
  24  * @author              Roland Haeder <webmaster@shipsimu.org>
  25  * @version             0.0.0
  26  * @copyright   Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2018 Hub Developer Team
  27  * @license             GNU GPL 3.0 or any newer version
  28  * @link                http://www.shipsimu.org
  29  *
  30  * This program is free software: you can redistribute it and/or modify
  31  * it under the terms of the GNU General Public License as published by
  32  * the Free Software Foundation, either version 3 of the License, or
  33  * (at your option) any later version.
  34  *
  35  * This program is distributed in the hope that it will be useful,
  36  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  37  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  38  * GNU General Public License for more details.
  39  *
  40  * You should have received a copy of the GNU General Public License
  41  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  42  */
  43 class NodeMessageAnnouncementHandler extends BaseMessageHandler implements HandleableMessage, Registerable {
  44         /**
  45          * Protected constructor
  46          *
  47          * @return      void
  48          */
  49         protected function __construct () {
  50                 // Call parent constructor
  51                 parent::__construct(__CLASS__);
  52
  53                 // Set handler name
  54                 $this->setHandlerName('message_announcement');
  55
  56                 // Init message data array
  57                 $this->messageDataElements = array(
  58                         XmlAnnouncementTemplateEngine::ANNOUNCEMENT_DATA_EXTERNAL_ADDRESS,
  59                         XmlAnnouncementTemplateEngine::ANNOUNCEMENT_DATA_INTERNAL_ADDRESS,
  60                         XmlAnnouncementTemplateEngine::ANNOUNCEMENT_DATA_NODE_STATUS,
  61                         XmlAnnouncementTemplateEngine::ANNOUNCEMENT_DATA_NODE_MODE,
  62                         XmlAnnouncementTemplateEngine::ANNOUNCEMENT_DATA_NODE_ID,
  63                         XmlAnnouncementTemplateEngine::ANNOUNCEMENT_DATA_SESSION_ID,
  64                         XmlAnnouncementTemplateEngine::ANNOUNCEMENT_DATA_PRIVATE_KEY_HASH,
  65                 );
  66
  67                 // Init message-data->configuration translation array
  68                 $this->messageToConfig = array(
  69                         XmlAnnouncementTemplateEngine::ANNOUNCEMENT_DATA_EXTERNAL_ADDRESS => 'your_external_address',
  70                         XmlAnnouncementTemplateEngine::ANNOUNCEMENT_DATA_INTERNAL_ADDRESS => 'your_internal_address',
  71                         XmlAnnouncementTemplateEngine::ANNOUNCEMENT_DATA_NODE_ID          => 'your_node_id',
  72                         XmlAnnouncementTemplateEngine::ANNOUNCEMENT_DATA_SESSION_ID       => 'your_session_id',
  73                         XmlAnnouncementTemplateEngine::ANNOUNCEMENT_DATA_PRIVATE_KEY_HASH => 'your_private_key_hash',
  74                 );
  75
  76                 // Init config-copy array
  77                 $this->configCopy = array(
  78                         XmlAnnouncementAnswerTemplateEngine::ANNOUNCEMENT_DATA_EXTERNAL_ADDRESS => 'external_address',
  79                         XmlAnnouncementAnswerTemplateEngine::ANNOUNCEMENT_DATA_INTERNAL_ADDRESS => 'internal_address',
  80                         XmlAnnouncementAnswerTemplateEngine::ANNOUNCEMENT_DATA_NODE_STATUS      => 'node_status',
  81                         XmlAnnouncementAnswerTemplateEngine::ANNOUNCEMENT_DATA_SESSION_ID       => 'session_id',
  82                         XmlAnnouncementAnswerTemplateEngine::ANNOUNCEMENT_DATA_PRIVATE_KEY_HASH => 'private_key_hash',
  83                 );
  84
  85                 // Init array
  86                 $this->searchData = array(
  87                         XmlAnnouncementTemplateEngine::ANNOUNCEMENT_DATA_EXTERNAL_ADDRESS
  88                 );
  89         }
  90
  91         /**
  92          * Creates an instance of this class
  93          *
  94          * @return      $handlerInstance        An instance of a HandleableMessage class
  95          */
  96         public final static function createNodeMessageAnnouncementHandler () {
  97                 // Get new instance
  98                 $handlerInstance = new NodeMessageAnnouncementHandler();
  99
 100                 // Return the prepared instance
 101                 return $handlerInstance;
 102         }
 103
 104         /**
 105          * Handles data array of the message
 106          *
 107          * @param       $messageInstance        An instance of a DeliverableMessage class
 108          * @param       $handlerInstance        An instance of a Receivable class
 109          * @return      void
 110          * @throws      AnnouncementNotAcceptedException        If this node does not accept announcements
 111          */
 112         public function handleMessageData (DeliverableMessage $messageInstance, Receivable $handlerInstance) {
 113                 // Get node instance
 114                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('NODE-MESSAGE-HANDLER: Creating node instance ...');
 115                 $nodeInstance = NodeObjectFactory::createNodeInstance();
 116
 117                 // Is this node accepting announcements?
 118                 if (!$nodeInstance->isAcceptingAnnouncements()) {
 119                         /*
 120                          * This node is not accepting announcements, then someone wants to
 121                          * announce his node to a non-bootstrap and non-master node.
 122                          */
 123                         throw new AnnouncementNotAcceptedException(array($this, $nodeInstance, $messageInstance), BaseHubSystem::EXCEPTION_ANNOUNCEMENT_NOT_ACCEPTED);
 124                 } // END - if
 125
 126                 // Register the announcing node with this node
 127                 $this->registerNodeByMessageInstance($messageInstance);
 128
 129                 // Prepare answer message to be delivered back to the other node
 130                 $this->prepareAnswerMessage($messageInstance, $handlerInstance);
 131         }
 132
 133         /**
 134          * Adds all required elements from given array into data set instance
 135          *
 136          * @param       $dataSetInstance        An instance of a StoreableCriteria class
 137          * @param       $messageInstance        An instance of a DeliverableMessage class
 138          * @return      void
 139          */
 140         public function addArrayToDataSet (StoreableCriteria $dataSetInstance, DeliverableMessage $messageInstance) {
 141                 // Add generic first
 142                 parent::addArrayToDataSet($dataSetInstance, $messageInstance);
 143
 144                 // Add all ements
 145                 foreach ($this->messageDataElements as $key) {
 146                         // Is it there?
 147                         assert(isset($messageData[$key]));
 148
 149                         // Add it
 150                         /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('ANNOUNCEMENT-HANDLER: Adding messageData[' . $key . ']=' . $messageData[$key] . ' ...');
 151                         $dataSetInstance->addCriteria($key, $messageData[$key]);
 152                 } // END - foreach
 153         }
 154
 155         /**
 156          * Initializes configuration data from given message data array
 157          *
 158          * @param       $messageInstance        An instance of a DeliverableMessage class
 159          * @return      void
 160          */
 161         protected function initMessageConfigurationData (DeliverableMessage $messageInstance) {
 162                 // "Walk" throught the translation array
 163                 /* PRINTR-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('ANNOUNCEMENT-HANDLER: messageInstance=' . print_r($messageInstance, TRUE));
 164                 foreach ($this->messageToConfig as $messageKey => $configKey) {
 165                         // Debug message
 166                         /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('ANNOUNCEMENT-HANDLER: Setting messageKey=' . $messageKey . ',configKey=' . $configKey . ':' . $messageData[$messageKey]);
 167
 168                         // Set the element in configuration
 169                         FrameworkBootstrap::getConfigurationInstance()->setConfigEntry($configKey, $messageData[$messageKey]);
 170                 } // END - foreach
 171
 172                 // "Walk" throught the config-copy array
 173                 foreach ($this->configCopy as $targetKey => $sourceKey) {
 174                         // Debug message
 175                         /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('ANNOUNCEMENT-HANDLER: Copying from sourceKey=' . $sourceKey . ' to targetKey=' . $targetKey . '...');
 176
 177                         // Copy from source to targetKey
 178                         FrameworkBootstrap::getConfigurationInstance()->setConfigEntry($targetKey, FrameworkBootstrap::getConfigurationInstance()->getConfigEntry($sourceKey));
 179                 } // END - foreach
 180
 181                 // Translate last exception into a status code
 182                 $statusCode = $this->getTranslatedStatusFromLastException();
 183
 184                 // Set it in configuration (temporarily)
 185                 FrameworkBootstrap::getConfigurationInstance()->setConfigEntry(NodeDistributedHashTableDatabaseFrontend::DB_COLUMN_ANSWER_STATUS, $statusCode);
 186         }
 187
 188         /**
 189          * Removes configuration data with given message data array from global
 190          * configuration
 191          *
 192          * @param       $messageData    An instance of a DeliverableMessage class
 193          * @return      void
 194          */
 195         protected function removeMessageConfigurationData (DeliverableMessage $messageInstance) {
 196                 // "Walk" throught the translation array again
 197                 foreach ($this->messageToConfig as $dummy => $configKey) {
 198                         // Now unset this configuration entry (to save some memory)
 199                         FrameworkBootstrap::getConfigurationInstance()->unsetConfigEntry($configKey);
 200                 } // END - foreach
 201
 202                 // "Walk" throught the config-copy array again
 203                 foreach ($this->configCopy as $configKey => $dummy) {
 204                         // Now unset this configuration entry (to save some memory again)
 205                         FrameworkBootstrap::getConfigurationInstance()->unsetConfigEntry($configKey);
 206                 } // END - foreach
 207
 208                 // Remove NodeDistributedHashTableDatabaseFrontend::DB_COLUMN_ANSWER_STATUS as well
 209                 FrameworkBootstrap::getConfigurationInstance()->unsetConfigEntry(NodeDistributedHashTableDatabaseFrontend::DB_COLUMN_ANSWER_STATUS);
 210         }
 211
 212 }