]> git.mxchange.org Git - hub.git/blob - application/hub/main/handler/message-types/requests/class_NodeMessageRequestNodeListHandler.php
Added line numbers to debug lines as this will become the 'norm'
[hub.git] / application / hub / main / handler / message-types / requests / class_NodeMessageRequestNodeListHandler.php
1 <?php
2 /**
3  * A NodeMessageRequestNodeList handler
4  *
5  * @author              Roland Haeder <webmaster@ship-simu.org>
6  * @version             0.0.0
7  * @copyright   Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2012 Hub Developer Team
8  * @license             GNU GPL 3.0 or any newer version
9  * @link                http://www.ship-simu.org
10  *
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.
15  *
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.
20  *
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/>.
23  */
24 class NodeMessageRequestNodeListHandler extends BaseMessageHandler implements HandleableMessage, Registerable {
25         /**
26          * Protected constructor
27          *
28          * @return      void
29          */
30         protected function __construct () {
31                 // Call parent constructor
32                 parent::__construct(__CLASS__);
33
34                 // Set handler name
35                 $this->setHandlerName('message_request_node_list');
36
37                 // Init message data array
38                 $this->messageDataElements = array(
39                         XmlRequestNodeListTemplateEngine::REQUEST_DATA_ACCEPTED_OBJECT_TYPES,
40                 );
41
42                 // Init config-copy array
43                 $this->configCopy = array(
44                 );
45
46                 // Init search data array
47                 $this->searchData = array(
48                         XmlRequestNodeListTemplateEngine::REQUEST_DATA_SESSION_ID,
49                 );
50         }
51
52         /**
53          * Creates an instance of this class
54          *
55          * @return      $handlerInstance        An instance of a HandleableMessage class
56          */
57         public final static function createNodeMessageRequestNodeListHandler () {
58                 // Get new instance
59                 $handlerInstance = new NodeMessageRequestNodeListHandler();
60
61                 // Return the prepared instance
62                 return $handlerInstance;
63         }
64
65         /**
66          * Handles data array of the message
67          *
68          * @param       $messageData            An array with message data to handle
69          * @param       $packageInstance        An instance of a Receivable class
70          * @return      void
71          * @throws      RequestNotAcceptedException             If this node does not accept this request
72          */
73         public function handleMessageData (array $messageData, Receivable $packageInstance) {
74                 // Get node instance
75                 $nodeInstance = Registry::getRegistry()->getInstance('node');
76
77                 // Is this node accepting announcements?
78                 if (!$nodeInstance->isAcceptingNodeListRequests()) {
79                         /*
80                          * This node is not accepting node list requests. Throw an
81                          * exception to abort any further processing.
82                          */
83                         throw new RequestNotAcceptedException(array($this, $nodeInstance, $messageData), self::EXCEPTION_REQUEST_NOT_ACCEPTED);
84                 } // END - if
85
86                 // Register the announcing node with this node
87                 $this->registerNodeByMessageData($messageData);
88
89                 // Prepare answer message to be delivered back to the other node
90                 $this->prepareAnswerMessage($messageData, $packageInstance);
91         }
92
93         /**
94          * Adds all required elements from given array into data set instance
95          *
96          * @param       $dataSetInstance        An instance of a StoreableCriteria class
97          * @param       $messageData            An array with all message data
98          * @return      void
99          */
100         public function addArrayToDataSet (StoreableCriteria $dataSetInstance, array $messageData) {
101                 // Add generic first
102                 parent::addArrayToDataSet($dataSetInstance, $messageData);
103
104                 // Add all ements
105                 foreach ($this->messageDataElements as $key) {
106                         // Is it there?
107                         assert(isset($messageData[$key]));
108
109                         // Add it
110                         $dataSetInstance->addCriteria($key, $messageData[$key]);
111                 } // END - foreach
112         }
113
114         /**
115          * Initializes configuration data from given message data array
116          *
117          * @param       $messageData    An array with all message data
118          * @return      void
119          */
120         protected function initMessageConfigurationData (array $messageData) {
121                 // Debug message
122                 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(' REQUEST-HANDLER[' . __LINE__ . ']: messageData=' . print_r($messageData, true));
123
124                 // "Walk" throught the config-copy array
125                 foreach ($this->configCopy as $targetKey => $sourceKey) {
126                         // Debug message
127                         //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('REQUEST-HANDLER[' . __LINE__ . ']: Copying from sourceKey=' . $sourceKey . ' to targetKey=' . $targetKey . '...');
128
129                         // Copy from source to targetKey
130                         $this->getConfigInstance()->setConfigEntry($targetKey, $this->getConfigInstance()->getConfigEntry($sourceKey));
131                 } // END - foreach
132
133                 // Query local DHT for nodes except given session id
134                 $nodeList = $this->getDhtInstance()->queryLocalNodeListExceptByMessageData($messageData, $this, XmlRequestNodeListTemplateEngine::REQUEST_DATA_SESSION_ID, XmlRequestNodeListTemplateEngine::REQUEST_DATA_ACCEPTED_OBJECT_TYPES, BaseHubNode::OBJECT_LIST_SEPARATOR);
135
136                 // Set it serialized in configuration (temporarily)
137                 $this->getConfigInstance()->setConfigEntry('node_list', base64_encode(serialize($nodeList)));
138
139                 // Translate last exception into a status code
140                 $statusCode = $this->getTranslatedStatusFromLastException();
141
142                 // Set it in configuration (temporarily)
143                 $this->getConfigInstance()->setConfigEntry('answer_status', $statusCode);
144         }
145
146         /**
147          * Removes configuration data with given message data array from global
148          * configuration
149          *
150          * @param       $messageData    An array with all message data
151          * @return      void
152          */
153         protected function removeMessageConfigurationData (array $messageData) {
154                 // "Walk" throught the config-copy array again
155                 foreach ($this->configCopy as $configKey => $dummy) {
156                         // Now unset this configuration entry (to save some memory again)
157                         $this->getConfigInstance()->unsetConfigEntry($configKey);
158                 } // END - foreach
159
160                 // Remove answer status/node list as well
161                 $this->getConfigInstance()->unsetConfigEntry('answer_status');
162                 $this->getConfigInstance()->unsetConfigEntry('node_list');
163         }
164 }
165
166 // [EOF]
167 ?>