3 * A NetworkPackage class. This class implements Deliverable and Receivable
4 * because all network packages should be deliverable to other nodes and
5 * receivable from other nodes. It further provides methods for reading raw
6 * content from template engines and feeding it to the stacker for undeclared
9 * The factory method requires you to provide a compressor class (which must
10 * implement the Compressor interface). If you don't want any compression (not
11 * adviceable due to increased network load), please use the NullCompressor
12 * class and encode it with BASE64 for a more error-free transfer over the
15 * For performance reasons, this class should only be instanciated once and then
16 * used as a "pipe-through" class.
18 * @author Roland Haeder <webmaster@shipsimu.org>
20 * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2015 Hub Developer Team
21 * @license GNU GPL 3.0 or any newer version
22 * @link http://www.shipsimu.org
23 * @todo Needs to add functionality for handling the object's type
25 * This program is free software: you can redistribute it and/or modify
26 * it under the terms of the GNU General Public License as published by
27 * the Free Software Foundation, either version 3 of the License, or
28 * (at your option) any later version.
30 * This program is distributed in the hope that it will be useful,
31 * but WITHOUT ANY WARRANTY; without even the implied warranty of
32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
33 * GNU General Public License for more details.
35 * You should have received a copy of the GNU General Public License
36 * along with this program. If not, see <http://www.gnu.org/licenses/>.
38 class NetworkPackage extends BaseHubSystem implements Deliverable, Receivable, Registerable, Visitable {
40 * Package mask for compressing package data:
41 * 0: Compressor extension
43 * 2: Tags, seperated by semicolons, no semicolon is required if only one tag is needed
47 const PACKAGE_MASK = '%s%s%s%s%s%s%s';
50 * Separator for the above mask
52 const PACKAGE_MASK_SEPARATOR = '^';
55 * Size of an array created by invoking
56 * explode(NetworkPackage::PACKAGE_MASK_SEPARATOR, $content).
58 const PACKAGE_CONTENT_ARRAY_SIZE = 4;
61 * Separator for checksum
63 const PACKAGE_CHECKSUM_SEPARATOR = '_';
66 * Array indexes for above mask, start with zero
68 const INDEX_COMPRESSOR_EXTENSION = 0;
69 const INDEX_PACKAGE_DATA = 1;
71 const INDEX_CHECKSUM = 3;
74 * Array indexes for raw package array
76 const INDEX_PACKAGE_SENDER = 0;
77 const INDEX_PACKAGE_RECIPIENT = 1;
78 const INDEX_PACKAGE_CONTENT = 2;
79 const INDEX_PACKAGE_STATUS = 3;
80 const INDEX_PACKAGE_HASH = 4;
83 * Size of the decoded data array
85 const DECODED_DATA_ARRAY_SIZE = 5;
88 * Named array elements for decoded package content
90 const PACKAGE_CONTENT_EXTENSION = 'compressor';
91 const PACKAGE_CONTENT_MESSAGE = 'message';
92 const PACKAGE_CONTENT_TAGS = 'tags';
93 const PACKAGE_CONTENT_CHECKSUM = 'checksum';
96 * Named array elements for package data
98 const PACKAGE_DATA_SENDER = 'sender';
99 const PACKAGE_DATA_RECIPIENT = 'recipient';
100 const PACKAGE_DATA_CONTENT = 'content';
101 const PACKAGE_DATA_STATUS = 'status';
102 const PACKAGE_DATA_HASH = 'hash';
107 const PACKAGE_STATUS_NEW = 'new';
108 const PACKAGE_STATUS_FAILED = 'failed';
109 const PACKAGE_STATUS_DECODED = 'decoded';
110 const PACKAGE_STATUS_FAKED = 'faked';
113 * Constants for message data array
115 const MESSAGE_ARRAY_DATA = 'message_data';
116 const MESSAGE_ARRAY_TYPE = 'message_type';
119 * Generic answer status field
125 const PACKAGE_TAGS_SEPARATOR = ';';
128 * Raw package data separator
130 const PACKAGE_DATA_SEPARATOR = '#';
133 * Separator for more than one recipient
135 const PACKAGE_RECIPIENT_SEPARATOR = ':';
138 * Network target (alias): 'upper nodes'
140 const NETWORK_TARGET_UPPER = 'upper';
143 * Network target (alias): 'self'
145 const NETWORK_TARGET_SELF = 'self';
148 * Network target (alias): 'dht'
150 const NETWORK_TARGET_DHT = 'dht';
153 * TCP package size in bytes
155 const TCP_PACKAGE_SIZE = 512;
157 /**************************************************************************
158 * Stacker for out-going packages *
159 **************************************************************************/
162 * Stacker name for "undeclared" packages
164 const STACKER_NAME_UNDECLARED = 'package_undeclared';
167 * Stacker name for "declared" packages (which are ready to send out)
169 const STACKER_NAME_DECLARED = 'package_declared';
172 * Stacker name for "out-going" packages
174 const STACKER_NAME_OUTGOING = 'package_outgoing';
176 /**************************************************************************
177 * Stacker for incoming packages *
178 **************************************************************************/
181 * Stacker name for "incoming" decoded raw data
183 const STACKER_NAME_DECODED_INCOMING = 'package_decoded_data';
186 * Stacker name for handled decoded raw data
188 const STACKER_NAME_DECODED_HANDLED = 'package_handled_decoded';
191 * Stacker name for "chunked" decoded raw data
193 const STACKER_NAME_DECODED_CHUNKED = 'package_chunked_decoded';
195 /**************************************************************************
196 * Stacker for incoming messages *
197 **************************************************************************/
200 * Stacker name for new messages
202 const STACKER_NAME_NEW_MESSAGE = 'package_new_message';
205 * Stacker name for processed messages
207 const STACKER_NAME_PROCESSED_MESSAGE = 'package_processed_message';
209 /**************************************************************************
210 * Stacker for raw data handling *
211 **************************************************************************/
214 * Stacker for outgoing data stream
216 const STACKER_NAME_OUTGOING_STREAM = 'outgoing_stream';
219 * Array index for final hash
221 const RAW_FINAL_HASH_INDEX = 'hash';
224 * Array index for encoded data
226 const RAW_ENCODED_DATA_INDEX = 'data';
229 * Array index for sent bytes
231 const RAW_SENT_BYTES_INDEX = 'sent';
234 * Array index for socket resource
236 const RAW_SOCKET_INDEX = 'socket';
239 * Array index for buffer size
241 const RAW_BUFFER_SIZE_INDEX = 'buffer';
244 * Array index for diff between buffer and sent bytes
246 const RAW_DIFF_INDEX = 'diff';
248 /**************************************************************************
250 **************************************************************************/
251 const PROTOCOL_TCP = 'TCP';
252 const PROTOCOL_UDP = 'UDP';
255 * Protected constructor
259 protected function __construct () {
260 // Call parent constructor
261 parent::__construct(__CLASS__);
265 * Creates an instance of this class
267 * @param $compressorInstance A Compressor instance for compressing the content
268 * @return $packageInstance An instance of a Deliverable class
270 public static final function createNetworkPackage (Compressor $compressorInstance) {
272 $packageInstance = new NetworkPackage();
274 // Now set the compressor instance
275 $packageInstance->setCompressorInstance($compressorInstance);
278 * We need to initialize a stack here for our packages even for those
279 * which have no recipient address and stamp... ;-) This stacker will
280 * also be used for incoming raw data to handle it.
282 $stackInstance = ObjectFactory::createObjectByConfiguredName('network_package_stacker_class');
284 // At last, set it in this class
285 $packageInstance->setStackInstance($stackInstance);
288 $packageInstance->initStacks();
290 // Get a visitor instance for speeding up things and set it
291 $visitorInstance = ObjectFactory::createObjectByConfiguredName('node_raw_data_monitor_visitor_class');
292 $packageInstance->setVisitorInstance($visitorInstance);
294 // Get crypto instance and set it, too
295 $cryptoInstance = ObjectFactory::createObjectByConfiguredName('crypto_class');
296 $packageInstance->setCryptoInstance($cryptoInstance);
298 // Get a singleton package assembler instance from factory and set it here, too
299 $assemblerInstance = PackageAssemblerFactory::createAssemblerInstance($packageInstance);
300 $packageInstance->setAssemblerInstance($assemblerInstance);
303 $nodeInstance = NodeObjectFactory::createNodeInstance();
305 // Get pool instance from node
306 $poolInstance = $nodeInstance->getListenerPoolInstance();
309 $packageInstance->setListenerPoolInstance($poolInstance);
311 // Return the prepared instance
312 return $packageInstance;
316 * Initialize all stackers
318 * @param $forceReInit Whether to force reinitialization of all stacks
321 protected function initStacks ($forceReInit = FALSE) {
323 $this->getStackInstance()->initStacks(array(
324 self::STACKER_NAME_UNDECLARED,
325 self::STACKER_NAME_DECLARED,
326 self::STACKER_NAME_OUTGOING,
327 self::STACKER_NAME_DECODED_INCOMING,
328 self::STACKER_NAME_DECODED_HANDLED,
329 self::STACKER_NAME_DECODED_CHUNKED,
330 self::STACKER_NAME_NEW_MESSAGE,
331 self::STACKER_NAME_PROCESSED_MESSAGE,
332 self::STACKER_NAME_OUTGOING_STREAM
337 * "Getter" for hash from given content
339 * @param $content Raw package content
340 * @return $hash Hash for given package content
342 private function getHashFromContent ($content) {
344 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: content[md5]=' . md5($content) . ',sender=' . $this->getSessionId() . ',compressor=' . $this->getCompressorInstance()->getCompressorExtension());
347 // @TODO md5() is very weak, but it needs to be fast
350 self::PACKAGE_CHECKSUM_SEPARATOR .
351 $this->getSessionId() .
352 self::PACKAGE_CHECKSUM_SEPARATOR .
353 $this->getCompressorInstance()->getCompressorExtension()
357 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: content[md5]=' . md5($content) . ',sender=' . $this->getSessionId() . ',hash=' . $hash . ',compressor=' . $this->getCompressorInstance()->getCompressorExtension());
364 * Checks whether the checksum (sometimes called "hash") is the same
366 * @param $decodedContent Package raw content
367 * @param $decodedData Whole raw package data array
368 * @return $isChecksumValid Whether the checksum is the same
370 private function isChecksumValid (array $decodedContent, array $decodedData) {
372 $checksum = $this->getHashFromContentSessionId($decodedContent, $decodedData[self::PACKAGE_DATA_SENDER]);
375 $isChecksumValid = ($checksum == $decodedContent[self::PACKAGE_CONTENT_CHECKSUM]);
378 return $isChecksumValid;
382 * Change the package with given status in given stack
384 * @param $packageData Raw package data in an array
385 * @param $stackerName Name of the stacker
386 * @param $newStatus New status to set
389 private function changePackageStatus (array $packageData, $stackerName, $newStatus) {
390 // Skip this for empty stacks
391 if ($this->getStackInstance()->isStackEmpty($stackerName)) {
392 // This avoids an exception after all packages has failed
396 // Pop the entry (it should be it)
397 $nextData = $this->getStackInstance()->popNamed($stackerName);
399 // Compare both hashes
400 assert($nextData[self::PACKAGE_DATA_HASH] == $packageData[self::PACKAGE_DATA_HASH]);
402 // Temporary set the new status
403 $packageData[self::PACKAGE_DATA_STATUS] = $newStatus;
406 $this->getStackInstance()->pushNamed($stackerName, $packageData);
410 * "Getter" for hash from given content and sender's session id
412 * @param $decodedContent Raw package content
413 * @param $sessionId Session id of the sender
414 * @return $hash Hash for given package content
416 public function getHashFromContentSessionId (array $decodedContent, $sessionId) {
418 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: content[md5]=' . md5($decodedContent[self::PACKAGE_CONTENT_MESSAGE]) . ',sender=' . $sessionId . ',compressor=' . $decodedContent[self::PACKAGE_CONTENT_EXTENSION]);
421 // @TODO md5() is very weak, but it needs to be fast
423 $decodedContent[self::PACKAGE_CONTENT_MESSAGE] .
424 self::PACKAGE_CHECKSUM_SEPARATOR .
426 self::PACKAGE_CHECKSUM_SEPARATOR .
427 $decodedContent[self::PACKAGE_CONTENT_EXTENSION]
434 ///////////////////////////////////////////////////////////////////////////
435 // Delivering packages / raw data
436 ///////////////////////////////////////////////////////////////////////////
439 * Declares the given raw package data by discovering recipients
441 * @param $packageData Raw package data in an array
444 private function declareRawPackageData (array $packageData) {
445 // Make sure the required field is there
446 assert(isset($packageData[self::PACKAGE_DATA_RECIPIENT]));
449 * We need to disover every recipient, just in case we have a
450 * multi-recipient entry like 'upper' is. 'all' may be a not so good
451 * target because it causes an overload on the network and may be
452 * abused for attacking the network with large packages.
454 $discoveryInstance = PackageDiscoveryFactory::createPackageDiscoveryInstance();
456 // Discover all recipients, this may throw an exception
457 $discoveryInstance->discoverRecipients($packageData);
459 // Now get an iterator
460 $iteratorInstance = $discoveryInstance->getIterator();
462 // Make sure the iterator instance is valid
463 assert($iteratorInstance instanceof Iterator);
465 // Rewind back to the beginning
466 $iteratorInstance->rewind();
468 // ... and begin iteration
469 while ($iteratorInstance->valid()) {
471 $currentRecipient = $iteratorInstance->current();
474 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Setting recipient to ' . $currentRecipient . ',previous=' . $packageData[self::PACKAGE_DATA_RECIPIENT]);
477 $packageData[self::PACKAGE_DATA_RECIPIENT] = $currentRecipient;
479 // Push the declared package to the next stack.
480 $this->getStackInstance()->pushNamed(self::STACKER_NAME_DECLARED, $packageData);
483 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Package declared for recipient ' . $currentRecipient);
485 // Skip to next entry
486 $iteratorInstance->next();
490 * The recipient list can be cleaned up here because the package which
491 * shall be delivered has already been added for all entries from the
494 $discoveryInstance->clearRecipients();
498 * Delivers raw package data. In short, this will discover the raw socket
499 * resource through a discovery class (which will analyse the receipient of
500 * the package), register the socket with the connection (handler/helper?)
501 * instance and finally push the raw data on our outgoing queue.
503 * @param $packageData Raw package data in an array
506 private function deliverRawPackageData (array $packageData) {
508 * This package may become big, depending on the shared object size or
509 * delivered message size which shouldn't be so long (to save
510 * bandwidth). Because of the nature of the used protocol (TCP) we need
511 * to split it up into smaller pieces to fit it into a TCP frame.
513 * So first we need (again) a discovery class but now a protocol
514 * discovery to choose the right socket resource. The discovery class
515 * should take a look at the raw package data itself and then decide
516 * which (configurable!) protocol should be used for that type of
519 $discoveryInstance = SocketDiscoveryFactory::createSocketDiscoveryInstance();
521 // Now discover the right protocol
522 $socketResource = $discoveryInstance->discoverSocket($packageData, BaseConnectionHelper::CONNECTION_TYPE_OUTGOING);
525 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Reached line ' . __LINE__ . ' after discoverSocket() has been called.');
528 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: stateInstance=' . $helperInstance->getStateInstance());
529 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Reached line ' . __LINE__ . ' before isSocketRegistered() has been called.');
531 // The socket needs to be put in a special registry that can handle such data
532 $registryInstance = SocketRegistryFactory::createSocketRegistryInstance();
534 // Get the connection helper from registry
535 $helperInstance = Registry::getRegistry()->getInstance('connection');
537 // And make sure it is valid
538 assert($helperInstance instanceof ConnectionHelper);
540 // Get connection info class
541 $infoInstance = ConnectionInfoFactory::createConnectionInfoInstance($helperInstance->getProtocolName(), 'helper');
543 // Will the info instance with connection helper data
544 $infoInstance->fillWithConnectionHelperInformation($helperInstance);
547 if ((is_resource($socketResource)) && (!$registryInstance->isSocketRegistered($infoInstance, $socketResource))) {
549 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Registering socket ' . $socketResource . ' ...');
552 $registryInstance->registerSocket($infoInstance, $socketResource, $packageData);
553 } elseif (!$helperInstance->getStateInstance()->isPeerStateConnected()) {
554 // Is not connected, then we cannot send
555 self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Unexpected peer state ' . $helperInstance->getStateInstance()->__toString() . ' detected.');
557 // Shutdown the socket
558 $this->shutdownSocket($socketResource);
562 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Reached line ' . __LINE__ . ' after isSocketRegistered() has been called.');
564 // Make sure the connection is up
565 $helperInstance->getStateInstance()->validatePeerStateConnected();
568 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Reached line ' . __LINE__ . ' after validatePeerStateConnected() has been called.');
570 // Enqueue it again on the out-going queue, the connection is up and working at this point
571 $this->getStackInstance()->pushNamed(self::STACKER_NAME_OUTGOING, $packageData);
574 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Reached line ' . __LINE__ . ' after pushNamed() has been called.');
578 * Sends waiting packages
580 * @param $packageData Raw package data
583 private function sendOutgoingRawPackageData (array $packageData) {
587 // Get the right connection instance
588 $infoInstance = SocketRegistryFactory::createSocketRegistryInstance()->getInfoInstanceFromPackageData($packageData);
590 // Test helper instance
591 assert($infoInstance instanceof ShareableInfo);
593 // Get helper instance
594 $helperInstance = $infoInstance->getHelperInstance();
596 // Some sanity-checks on the object
597 //* DEBUG-DIE: */ die('[' . __METHOD__ . ':' . __LINE__ . ']: p1=' . $infoInstance->getProtocolName() . ',p2=' . $helperInstance->getProtocolName() . ',infoInstance=' . print_r($infoInstance, TRUE));
598 assert($helperInstance instanceof ConnectionHelper);
599 assert($infoInstance->getProtocolName() == $helperInstance->getProtocolName());
601 // Is this connection still alive?
602 if ($helperInstance->isShuttedDown()) {
603 // This connection is shutting down
604 // @TODO We may want to do somthing more here?
608 // Sent out package data
609 $helperInstance->sendRawPackageData($packageData);
613 * Generates a secure hash for given raw package content and sender id
615 * @param $content Raw package data
616 * @param $senderId Sender id to generate a hash for
617 * @return $hash Hash as hex-encoded string
619 private function generatePackageHash ($content, $senderId) {
620 // Hash content and sender id together, use scrypt
621 $hash = Scrypt::hashScrypt($senderId . ':' . $content . ':' . $this->getPrivateKeyHash());
628 * Checks whether the hash of given package data is 'valid', here that
629 * means it is the same or not.
631 * @param $decodedArray An array with 'decoded' (explode() was mostly called) data
632 * @return $isHashValid Whether the hash is valid
633 * @todo Unfinished area, hashes are currently NOT fully supported
635 private function isPackageHashValid (array $decodedArray) {
637 $isHashValid = Scrypt::checkScrypt($decodedArray[self::INDEX_PACKAGE_SENDER] . ':' . $decodedArray[self::INDEX_PACKAGE_CONTENT] . ':' . $this->getPrivateKeyHash(), $decodedArray[self::INDEX_PACKAGE_HASH]);
640 //* DEBUG-DIE: */ die(__METHOD__ . ': isHashValid=' . intval($isHashValid) . chr(10) . ',decodedArray=' . print_r($decodedArray, TRUE));
645 * "Enqueues" raw content into this delivery class by reading the raw content
646 * from given helper's template instance and pushing it on the 'undeclared'
649 * @param $helperInstance An instance of a HubHelper class
652 public function enqueueRawDataFromTemplate (HubHelper $helperInstance) {
654 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': CALLED!');
656 // Get the raw content ...
657 $content = $helperInstance->getTemplateInstance()->getRawTemplateData();
658 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('content(' . strlen($content) . ')=' . $content);
660 // ... and compress it
661 $content = $this->getCompressorInstance()->compressStream($content);
663 // Add magic in front of it and hash behind it, including BASE64 encoding
664 $packageContent = sprintf(self::PACKAGE_MASK,
665 // 1.) Compressor's extension
666 $this->getCompressorInstance()->getCompressorExtension(),
668 self::PACKAGE_MASK_SEPARATOR,
669 // 2.) Raw package content, encoded with BASE64
670 base64_encode($content),
672 self::PACKAGE_MASK_SEPARATOR,
674 implode(self::PACKAGE_TAGS_SEPARATOR, $helperInstance->getPackageTags()),
676 self::PACKAGE_MASK_SEPARATOR,
678 $this->getHashFromContent($content)
682 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': Enqueueing package for recipientType=' . $helperInstance->getRecipientType() . ' ...');
684 // Now prepare the temporary array and push it on the 'undeclared' stack
685 $this->getStackInstance()->pushNamed(self::STACKER_NAME_UNDECLARED, array(
686 self::PACKAGE_DATA_SENDER => $this->getSessionId(),
687 self::PACKAGE_DATA_RECIPIENT => $helperInstance->getRecipientType(),
688 self::PACKAGE_DATA_CONTENT => $packageContent,
689 self::PACKAGE_DATA_STATUS => self::PACKAGE_STATUS_NEW,
690 self::PACKAGE_DATA_HASH => $this->generatePackageHash($packageContent, $this->getSessionId())
694 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': EXIT!');
698 * Checks whether a package has been enqueued for delivery.
700 * @return $isEnqueued Whether a package is enqueued
702 public function isPackageEnqueued () {
703 // Check whether the stacker is not empty
704 $isEnqueued = (($this->getStackInstance()->isStackInitialized(self::STACKER_NAME_UNDECLARED)) && (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_UNDECLARED)));
711 * Checks whether a package has been declared
713 * @return $isDeclared Whether a package is declared
715 public function isPackageDeclared () {
716 // Check whether the stacker is not empty
717 $isDeclared = (($this->getStackInstance()->isStackInitialized(self::STACKER_NAME_DECLARED)) && (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_DECLARED)));
724 * Checks whether a package should be sent out
726 * @return $isWaitingDelivery Whether a package is waiting for delivery
728 public function isPackageWaitingForDelivery () {
729 // Check whether the stacker is not empty
730 $isWaitingDelivery = (($this->getStackInstance()->isStackInitialized(self::STACKER_NAME_OUTGOING)) && (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_OUTGOING)));
733 return $isWaitingDelivery;
737 * Checks whether encoded (raw) data is pending
739 * @return $isPending Whether encoded data is pending
741 public function isEncodedDataPending () {
742 // Check whether the stacker is not empty
743 $isPending = (($this->getStackInstance()->isStackInitialized(self::STACKER_NAME_OUTGOING_STREAM)) && (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_OUTGOING_STREAM)));
750 * Delivers an enqueued package to the stated destination. If a non-session
751 * id is provided, recipient resolver is being asked (and instanced once).
752 * This allows that a single package is being delivered to multiple targets
753 * without enqueueing it for every target. If no target is provided or it
754 * can't be determined a NoTargetException is being thrown.
757 * @throws NoTargetException If no target can't be determined
759 public function declareEnqueuedPackage () {
761 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': CALLED!');
763 // Make sure this method isn't working if there is no package enqueued
764 if (!$this->isPackageEnqueued()) {
765 // This is not fatal but should be avoided
766 self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: No raw package data waiting declaration, but ' . __METHOD__ . ' has been called!');
771 * Now there are for sure packages to deliver, so start with the first
774 $packageData = $this->getStackInstance()->popNamed(self::STACKER_NAME_UNDECLARED);
776 // Declare the raw package data for delivery
777 $this->declareRawPackageData($packageData);
780 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': EXIT!');
784 * Delivers the next declared package. Only one package per time will be sent
785 * because this may take time and slows down the whole delivery
790 public function processDeclaredPackage () {
792 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': CALLED!');
794 // Sanity check if we have packages declared
795 if (!$this->isPackageDeclared()) {
796 // This is not fatal but should be avoided
797 self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: No package has been declared, but ' . __METHOD__ . ' has been called!');
802 $packageData = $this->getStackInstance()->getNamed(self::STACKER_NAME_DECLARED);
805 assert(isset($packageData[self::PACKAGE_DATA_RECIPIENT]));
807 // Try to deliver the package
809 // And try to send it
810 $this->deliverRawPackageData($packageData);
812 // And remove it finally
813 $this->getStackInstance()->popNamed(self::STACKER_NAME_DECLARED);
814 } catch (InvalidStateException $e) {
815 // The state is not excepected (shall be 'connected')
816 self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Caught ' . $e->__toString() . ',message=' . $e->getMessage());
818 // Mark the package with status failed
819 $this->changePackageStatus($packageData, self::STACKER_NAME_DECLARED, self::PACKAGE_STATUS_FAILED);
823 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': EXIT!');
827 * Sends waiting packages out for delivery
831 public function sendWaitingPackage () {
833 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': CALLED!');
835 // Sanity check if we have packages waiting for delivery
836 if (!$this->isPackageWaitingForDelivery()) {
837 // This is not fatal but should be avoided
838 self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: No package is waiting for delivery, but ' . __METHOD__ . ' was called.');
843 $packageData = $this->getStackInstance()->getNamed(self::STACKER_NAME_OUTGOING);
846 // Now try to send it
847 $this->sendOutgoingRawPackageData($packageData);
849 // And remove it finally
850 $this->getStackInstance()->popNamed(self::STACKER_NAME_OUTGOING);
851 } catch (InvalidSocketException $e) {
852 // Output exception message
853 self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Package was not delivered: ' . $e->getMessage());
855 // Mark package as failed
856 $this->changePackageStatus($packageData, self::STACKER_NAME_OUTGOING, self::PACKAGE_STATUS_FAILED);
860 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': EXIT!');
864 * Sends out encoded data to a socket
868 public function sendEncodedData () {
870 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': CALLED!');
872 // Make sure there is pending encoded data
873 assert($this->isEncodedDataPending());
875 // Pop current data from stack
876 $encodedDataArray = $this->getStackInstance()->popNamed(self::STACKER_NAME_OUTGOING_STREAM);
878 // Init in this round sent bytes
882 assert(is_resource($encodedDataArray[self::RAW_SOCKET_INDEX]));
885 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONNECTION-HELPER[' . __METHOD__ . ':' . __LINE__ . ']: Sending out ' . strlen($encodedDataArray[self::RAW_ENCODED_DATA_INDEX]) . ' bytes,rawBufferSize=' . $encodedDataArray[self::RAW_BUFFER_SIZE_INDEX] . ',diff=' . $encodedDataArray[self::RAW_DIFF_INDEX]);
886 if ($encodedDataArray[self::RAW_DIFF_INDEX] >= 0) {
887 // Send all out (encodedData is smaller than or equal buffer size)
888 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONNECTION-HELPER[' . __METHOD__ . ':' . __LINE__ . ']: MD5=' . md5(substr($encodedDataArray[self::RAW_ENCODED_DATA_INDEX], 0, ($encodedDataArray[self::RAW_BUFFER_SIZE_INDEX] - $encodedDataArray[self::RAW_DIFF_INDEX]))));
889 $sentBytes = @socket_write($encodedDataArray[self::RAW_SOCKET_INDEX], $encodedDataArray[self::RAW_ENCODED_DATA_INDEX], ($encodedDataArray[self::RAW_BUFFER_SIZE_INDEX] - $encodedDataArray[self::RAW_DIFF_INDEX]));
891 // Send buffer size out
892 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONNECTION-HELPER[' . __METHOD__ . ':' . __LINE__ . ']: MD5=' . md5(substr($encodedDataArray[self::RAW_ENCODED_DATA_INDEX], 0, $encodedDataArray[self::RAW_BUFFER_SIZE_INDEX])));
893 $sentBytes = @socket_write($encodedDataArray[self::RAW_SOCKET_INDEX], $encodedDataArray[self::RAW_ENCODED_DATA_INDEX], $encodedDataArray[self::RAW_BUFFER_SIZE_INDEX]);
896 // If there was an error, we don't continue here
897 if ($sentBytes === FALSE) {
898 // Handle the error with a faked recipientData array
899 $this->handleSocketError(__METHOD__, __LINE__, $encodedDataArray[self::RAW_SOCKET_INDEX], array('0.0.0.0', '0'));
902 throw new InvalidSocketException(array($this, $encodedDataArray[self::RAW_SOCKET_INDEX], $socketError, $errorMessage), BaseListener::EXCEPTION_INVALID_SOCKET);
903 } elseif (($sentBytes === 0) && (strlen($encodedDataArray[self::RAW_ENCODED_DATA_INDEX]) > 0)) {
904 // Nothing sent means we are done
905 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONNECTION-HELPER[' . __METHOD__ . ':' . __LINE__ . ']: All sent! (LINE=' . __LINE__ . ')');
908 // The difference between sent bytes and length of raw data should not go below zero
909 assert((strlen($encodedDataArray[self::RAW_ENCODED_DATA_INDEX]) - $sentBytes) >= 0);
911 // Add total sent bytes
912 $encodedDataArray[self::RAW_SENT_BYTES_INDEX] += $sentBytes;
914 // Cut out the last unsent bytes
915 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONNECTION-HELPER[' . __METHOD__ . ':' . __LINE__ . ']: Sent out ' . $sentBytes . ' of ' . strlen($encodedDataArray[self::RAW_ENCODED_DATA_INDEX]) . ' bytes ...');
916 $encodedDataArray[self::RAW_ENCODED_DATA_INDEX] = substr($encodedDataArray[self::RAW_ENCODED_DATA_INDEX], $sentBytes);
918 // Calculate difference again
919 $encodedDataArray[self::RAW_DIFF_INDEX] = $encodedDataArray[self::RAW_BUFFER_SIZE_INDEX] - strlen($encodedDataArray[self::RAW_ENCODED_DATA_INDEX]);
922 if (strlen($encodedDataArray[self::RAW_ENCODED_DATA_INDEX]) <= 0) {
923 // Abort here, all sent!
924 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('CONNECTION-HELPER[' . __METHOD__ . ':' . __LINE__ . ']: All sent! (LINE=' . __LINE__ . ')');
929 // Push array back in stack
930 $this->getStackInstance()->pushNamed(self::STACKER_NAME_OUTGOING_STREAM, $encodedDataArray);
933 //* DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . ': EXIT!');
936 ///////////////////////////////////////////////////////////////////////////
937 // Receiving packages / raw data
938 ///////////////////////////////////////////////////////////////////////////
941 * Checks whether decoded raw data is pending
943 * @return $isPending Whether decoded raw data is pending
945 private function isRawDataPending () {
946 // Just return whether the stack is not empty
947 $isPending = (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_DECODED_INCOMING));
954 * Checks whether new raw package data has arrived at a socket
956 * @return $hasArrived Whether new raw package data has arrived for processing
958 public function isNewRawDataPending () {
959 // Visit the pool. This monitors the pool for incoming raw data.
960 $this->getListenerPoolInstance()->accept($this->getVisitorInstance());
962 // Check for new data arrival
963 $hasArrived = $this->isRawDataPending();
970 * Handles the incoming decoded raw data. This method does not "convert" the
971 * decoded data back into a package array, it just "handles" it and pushs it
976 public function handleIncomingDecodedData () {
978 * This method should only be called if decoded raw data is pending,
981 if (!$this->isRawDataPending()) {
982 // This is not fatal but should be avoided
983 self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: No raw (decoded?) data is pending, but ' . __METHOD__ . ' has been called!');
987 // Very noisy debug message:
988 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Stacker size is ' . $this->getStackInstance()->getStackCount(self::STACKER_NAME_DECODED_INCOMING) . ' entries.');
990 // "Pop" the next entry (the same array again) from the stack
991 $decodedData = $this->getStackInstance()->popNamed(self::STACKER_NAME_DECODED_INCOMING);
993 // Make sure both array elements are there
995 (is_array($decodedData)) &&
996 (isset($decodedData[BaseRawDataHandler::PACKAGE_RAW_DATA])) &&
997 (isset($decodedData[BaseRawDataHandler::PACKAGE_ERROR_CODE]))
1001 * Also make sure the error code is SOCKET_ERROR_UNHANDLED because we
1002 * only want to handle unhandled packages here.
1004 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: errorCode=' . $decodedData[BaseRawDataHandler::PACKAGE_ERROR_CODE] . '(' . BaseRawDataHandler::SOCKET_ERROR_UNHANDLED . ')');
1005 assert($decodedData[BaseRawDataHandler::PACKAGE_ERROR_CODE] == BaseRawDataHandler::SOCKET_ERROR_UNHANDLED);
1007 // Remove the last chunk SEPARATOR (because there is no need for it)
1008 if (substr($decodedData[BaseRawDataHandler::PACKAGE_RAW_DATA], -1, 1) == PackageFragmenter::CHUNK_SEPARATOR) {
1009 // It is there and should be removed
1010 $decodedData[BaseRawDataHandler::PACKAGE_RAW_DATA] = substr($decodedData[BaseRawDataHandler::PACKAGE_RAW_DATA], 0, -1);
1013 // This package is "handled" and can be pushed on the next stack
1014 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Pushing ' . strlen($decodedData[BaseRawDataHandler::PACKAGE_RAW_DATA]) . ' bytes to stack ' . self::STACKER_NAME_DECODED_HANDLED . ' ...');
1015 $this->getStackInstance()->pushNamed(self::STACKER_NAME_DECODED_HANDLED, $decodedData);
1019 * Adds raw decoded data from the given handler instance to this receiver
1021 * @param $handlerInstance An instance of a Networkable class
1024 public function addRawDataToIncomingStack (Networkable $handlerInstance) {
1026 * Get the decoded data from the handler, this is an array with
1027 * 'raw_data' and 'error_code' as elements.
1029 $decodedData = $handlerInstance->getNextRawData();
1031 // Very noisy debug message:
1032 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: decodedData[' . gettype($decodedData) . ']=' . print_r($decodedData, TRUE));
1034 // And push it on our stack
1035 $this->getStackInstance()->pushNamed(self::STACKER_NAME_DECODED_INCOMING, $decodedData);
1039 * Checks whether incoming decoded data is handled.
1041 * @return $isHandled Whether incoming decoded data is handled
1043 public function isIncomingRawDataHandled () {
1044 // Determine if the stack is not empty
1045 $isHandled = (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_DECODED_HANDLED));
1052 * Checks whether the assembler has pending data left
1054 * @return $isHandled Whether the assembler has pending data left
1056 public function ifAssemblerHasPendingDataLeft () {
1057 // Determine if the stack is not empty
1058 $isHandled = (!$this->getAssemblerInstance()->isPendingDataEmpty());
1065 * Checks whether the assembler has multiple packages pending
1067 * @return $isPending Whether the assembler has multiple packages pending
1069 public function ifMultipleMessagesPending () {
1070 // Determine if the stack is not empty
1071 $isPending = ($this->getAssemblerInstance()->ifMultipleMessagesPending());
1078 * Handles the attached assemler's pending data queue to be finally
1079 * assembled to the raw package data back.
1083 public function handleAssemblerPendingData () {
1085 $this->getAssemblerInstance()->handlePendingData();
1089 * Handles multiple messages.
1093 public function handleMultipleMessages () {
1095 $this->getAssemblerInstance()->handleMultipleMessages();
1099 * Assembles incoming decoded data so it will become an abstract network
1100 * package again. The assembler does later do it's job by an other task,
1101 * not this one to keep best speed possible.
1105 public function assembleDecodedDataToPackage () {
1106 // Make sure the raw decoded package data is handled
1107 assert($this->isIncomingRawDataHandled());
1109 // Get current package content (an array with two elements; see handleIncomingDecodedData() for details)
1110 $packageContent = $this->getStackInstance()->getNamed(self::STACKER_NAME_DECODED_HANDLED);
1112 // Assert on some elements
1114 (is_array($packageContent)) &&
1115 (isset($packageContent[BaseRawDataHandler::PACKAGE_RAW_DATA])) &&
1116 (isset($packageContent[BaseRawDataHandler::PACKAGE_ERROR_CODE]))
1119 // Start assembling the raw package data array by chunking it
1120 $this->getAssemblerInstance()->chunkPackageContent($packageContent);
1122 // Remove the package from 'handled_decoded' stack ...
1123 $this->getStackInstance()->popNamed(self::STACKER_NAME_DECODED_HANDLED);
1125 // ... and push it on the 'chunked' stacker
1126 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: Pushing ' . strlen($packageContent[BaseRawDataHandler::PACKAGE_RAW_DATA]) . ' bytes on stack ' . self::STACKER_NAME_DECODED_CHUNKED . ',packageContent=' . print_r($packageContent, TRUE));
1127 $this->getStackInstance()->pushNamed(self::STACKER_NAME_DECODED_CHUNKED, $packageContent);
1131 * Accepts the visitor to process the visit "request"
1133 * @param $visitorInstance An instance of a Visitor class
1136 public function accept (Visitor $visitorInstance) {
1138 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: ' . $visitorInstance->__toString() . ' has visited - CALLED!');
1140 // Visit the package
1141 $visitorInstance->visitNetworkPackage($this);
1143 // Then visit the assembler to handle multiple packages
1144 $this->getAssemblerInstance()->accept($visitorInstance);
1147 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: ' . $visitorInstance->__toString() . ' has visited - EXIT!');
1155 public function clearAllStacks () {
1156 // Call the init method to force re-initialization
1157 $this->initStacks(TRUE);
1160 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: All stacker have been re-initialized.');
1164 * Removes the first failed outoging package from the stack to continue
1165 * with next one (it will never work until the issue is fixed by you).
1168 * @throws UnexpectedPackageStatusException If the package status is not 'failed'
1169 * @todo This may be enchanced for outgoing packages?
1171 public function removeFirstFailedPackage () {
1172 // Get the package again
1173 $packageData = $this->getStackInstance()->getNamed(self::STACKER_NAME_DECLARED);
1175 // Is the package status 'failed'?
1176 if ($packageData[self::PACKAGE_DATA_STATUS] != self::PACKAGE_STATUS_FAILED) {
1178 throw new UnexpectedPackageStatusException(array($this, $packageData, self::PACKAGE_STATUS_FAILED), BaseListener::EXCEPTION_UNEXPECTED_PACKAGE_STATUS);
1181 // Remove this entry
1182 $this->getStackInstance()->popNamed(self::STACKER_NAME_DECLARED);
1186 * "Decode" the package content into the same array when it was sent.
1188 * @param $rawPackageContent The raw package content to be "decoded"
1189 * @return $decodedData An array with 'sender', 'recipient', 'content' and 'status' elements
1191 public function decodeRawContent ($rawPackageContent) {
1192 // Use the separator '#' to "decode" it
1193 $decodedArray = explode(self::PACKAGE_DATA_SEPARATOR, $rawPackageContent);
1195 // Assert on count (should be always 3)
1196 assert(count($decodedArray) == self::DECODED_DATA_ARRAY_SIZE);
1198 // Generate the hash of comparing it
1199 if (!$this->isPackageHashValid($decodedArray)) {
1200 // Is not valid, so throw an exception here
1201 exit(__METHOD__ . ':INVALID HASH! UNDER CONSTRUCTION!' . chr(10));
1205 * Create 'decodedData' array with all assoziative array elements.
1207 $decodedData = array(
1208 self::PACKAGE_DATA_SENDER => $decodedArray[self::INDEX_PACKAGE_SENDER],
1209 self::PACKAGE_DATA_RECIPIENT => $decodedArray[self::INDEX_PACKAGE_RECIPIENT],
1210 self::PACKAGE_DATA_CONTENT => $decodedArray[self::INDEX_PACKAGE_CONTENT],
1211 self::PACKAGE_DATA_STATUS => self::PACKAGE_STATUS_DECODED,
1212 self::PACKAGE_DATA_HASH => $decodedArray[self::INDEX_PACKAGE_HASH]
1216 return $decodedData;
1220 * Handles decoded data for this node by "decoding" the 'content' part of
1221 * it. Again this method uses explode() for the "decoding" process.
1223 * @param $decodedData An array with decoded raw package data
1225 * @throws InvalidDataChecksumException If the checksum doesn't match
1227 public function handleRawData (array $decodedData) {
1229 * "Decode" the package's content by a simple explode() call, for
1230 * details of the array elements, see comments for constant
1233 $decodedContent = explode(self::PACKAGE_MASK_SEPARATOR, $decodedData[self::PACKAGE_DATA_CONTENT]);
1235 // Assert on array count for a very basic validation
1236 assert(count($decodedContent) == self::PACKAGE_CONTENT_ARRAY_SIZE);
1239 * Convert the indexed array into an associative array. This is much
1240 * better to remember than plain numbers, isn't it?
1242 $decodedContent = array(
1243 // Compressor's extension used to compress the data
1244 self::PACKAGE_CONTENT_EXTENSION => $decodedContent[self::INDEX_COMPRESSOR_EXTENSION],
1245 // Package data (aka "message") in BASE64-decoded form but still compressed
1246 self::PACKAGE_CONTENT_MESSAGE => base64_decode($decodedContent[self::INDEX_PACKAGE_DATA]),
1247 // Tags as an indexed array for "tagging" the message
1248 self::PACKAGE_CONTENT_TAGS => explode(self::PACKAGE_TAGS_SEPARATOR, $decodedContent[self::INDEX_TAGS]),
1249 // Checksum of the _decoded_ data
1250 self::PACKAGE_CONTENT_CHECKSUM => $decodedContent[self::INDEX_CHECKSUM]
1253 // Is the checksum valid?
1254 if (!$this->isChecksumValid($decodedContent, $decodedData)) {
1255 // Is not the same, so throw an exception here
1256 throw new InvalidDataChecksumException(array($this, $decodedContent, $decodedData), BaseListener::EXCEPTION_INVALID_DATA_CHECKSUM);
1260 * The checksum is the same, then it can be decompressed safely. The
1261 * original message is at this point fully decoded.
1263 $decodedContent[self::PACKAGE_CONTENT_MESSAGE] = $this->getCompressorInstance()->decompressStream($decodedContent[self::PACKAGE_CONTENT_MESSAGE]);
1265 // And push it on the next stack
1266 $this->getStackInstance()->pushNamed(self::STACKER_NAME_NEW_MESSAGE, $decodedContent);
1270 * Checks whether a new message has arrived
1272 * @return $hasArrived Whether a new message has arrived for processing
1274 public function isNewMessageArrived () {
1275 // Determine if the stack is not empty
1276 $hasArrived = (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_NEW_MESSAGE));
1283 * Handles newly arrived messages
1286 * @todo Implement verification of all sent tags here?
1288 public function handleNewlyArrivedMessage () {
1289 // Get it from the stacker, it is the full array with the decoded message
1290 $decodedContent = $this->getStackInstance()->popNamed(self::STACKER_NAME_NEW_MESSAGE);
1292 // Now get a filter chain back from factory with given tags array
1293 $chainInstance = PackageFilterChainFactory::createChainByTagsArray($decodedContent[self::PACKAGE_CONTENT_TAGS]);
1296 * Process the message through all filters, note that all other
1297 * elements from $decodedContent are no longer needed.
1299 $chainInstance->processMessage($decodedContent[self::PACKAGE_CONTENT_MESSAGE], $this);
1303 * Checks whether a processed message is pending for "interpretation"
1305 * @return $isPending Whether a processed message is pending
1307 public function isProcessedMessagePending () {
1309 $isPending = (!$this->getStackInstance()->isStackEmpty(self::STACKER_NAME_PROCESSED_MESSAGE));
1316 * Handle processed messages by "interpreting" the 'message_type' element
1320 public function handleProcessedMessage () {
1321 // Get it from the stacker, it is the full array with the processed message
1322 $messageArray = $this->getStackInstance()->popNamed(self::STACKER_NAME_PROCESSED_MESSAGE);
1324 // Add type for later easier handling
1325 $messageArray[self::MESSAGE_ARRAY_DATA][self::MESSAGE_ARRAY_TYPE] = $messageArray[self::MESSAGE_ARRAY_TYPE];
1328 //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('NETWORK-PACKAGE[' . __METHOD__ . ':' . __LINE__ . ']: messageArray=' . print_r($messageArray, TRUE));
1330 // Create a handler instance from given message type
1331 $handlerInstance = MessageTypeHandlerFactory::createMessageTypeHandlerInstance($messageArray[self::MESSAGE_ARRAY_TYPE]);
1333 // Handle message data
1334 $handlerInstance->handleMessageData($messageArray[self::MESSAGE_ARRAY_DATA], $this);