3 * A general listener class
5 * @author Roland Haeder <webmaster@ship-simu.org>
7 * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2011 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 BaseListener extends BaseHubSystem implements Visitable {
25 // Exception code constants
26 const EXCEPTION_INVALID_SOCKET = 0xa00;
27 const EXCEPTION_SOCKET_ALREADY_REGISTERED = 0xa01;
28 const EXCEPTION_SOCKET_CREATION_FAILED = 0xa02;
29 const EXCEPTION_NO_SOCKET_ERROR = 0xa03;
30 const EXCEPTION_CONNECTION_ALREADY_REGISTERED = 0xa04;
31 const EXCEPTION_UNEXPECTED_PACKAGE_STATUS = 0xa05;
32 const EXCEPTION_UNSUPPORTED_PACKAGE_CODE_HANDLER = 0xa06;
33 const EXCEPTION_FINAL_CHUNK_VERIFICATION = 0xa07;
36 * Used protocol (Default: invalid, which is indeed invalid...)
38 private $protocol = 'invalid';
41 * Address (IP mostly) we shall listen on
43 private $listenAddress = '0.0.0.0'; // This is the default and listens on all interfaces
46 * Port we shall listen on (or wait for incoming data)
48 private $listenPort = 0; // This port MUST be changed by your application
51 * Whether we are in blocking or non-blocking mode (default: non-blocking
53 private $blockingMode = false;
56 * A peer pool instance
58 private $poolInstance = NULL;
61 * Protected constructor
63 * @param $className Name of the class
66 protected function __construct ($className) {
67 // Call parent constructor
68 parent::__construct($className);
72 * Checks whether the given socket resource is a server socket
74 * @param $socketResource A valid socket resource
75 * @return $isServerSocket Whether the socket resource is a server socket
77 protected function isServerSocketResource ($socketResource) {
79 $isServerSocket = ((is_resource($socketResource)) && (!@socket_getpeername($socketResource, $peerName)));
81 // We need to clear the error here if it is a resource
82 if ($isServerSocket === true) {
84 //* DEBUG: */ $this->debugOutput('socketResource[]=' . gettype($socketResource));
85 socket_clear_error($socketResource);
88 // Check peer name, it must be empty
89 $isServerSocket = (($isServerSocket) && (empty($peerName)));
92 return $isServerSocket;
96 * Setter for listen address
98 * @param $listenAddress The address this listener should listen on
101 protected final function setListenAddress ($listenAddress) {
102 $this->listenAddress = (string) $listenAddress;
106 * Getter for listen address
108 * @return $listenAddress The address this listener should listen on
110 public final function getListenAddress () {
111 return $this->listenAddress;
115 * Setter for listen port
117 * @param $listenPort The port this listener should listen on
120 protected final function setListenPort ($listenPort) {
121 $this->listenPort = (int) $listenPort;
125 * Getter for listen port
127 * @return $listenPort The port this listener should listen on
129 public final function getListenPort () {
130 return $this->listenPort;
134 * Getter for port number to satify ProtocolHandler
136 * @return $port The port number
138 public final function getPort () {
139 return $this->getListenPort();
143 * "Setter" to set listen address from configuration entry
145 * @param $configEntry The configuration entry holding our listen address
148 public final function setListenAddressByConfiguration ($configEntry) {
149 $this->setListenAddress($this->getConfigInstance()->getConfigEntry($configEntry));
153 * "Setter" to set listen port from configuration entry
155 * @param $configEntry The configuration entry holding our listen port
158 public final function setListenPortByConfiguration ($configEntry) {
159 $this->setListenPort($this->getConfigInstance()->getConfigEntry($configEntry));
163 * Setter for protocol
165 * @param $protocol Used protocol
168 protected final function setProtocol ($protocol) {
169 $this->protocol = (string) $protocol;
173 * Getter for protocol
175 * @return $protocol Used protocol
177 public final function getProtocol () {
178 return $this->protocol;
182 * Setter for blocking-mode
184 * @param $blockingMode Whether blocking-mode is disabled (default) or enabled
187 protected final function setBlockingMode ($blockingMode) {
188 $this->blockingMode = (boolean) $blockingMode;
192 * Checks whether blocking-mode is enabled or disabled
194 * @return $blockingMode Whether blocking mode is disabled or enabled
196 public final function isBlockingModeEnabled () {
197 return $this->blockingMode;
201 * Setter for peer pool instance
203 * @param $poolInstance The peer pool instance we shall set
206 protected final function setPoolInstance (PoolablePeer $poolInstance) {
207 $this->poolInstance = $poolInstance;
211 * Getter for peer pool instance
213 * @return $poolInstance The peer pool instance we shall set
215 public final function getPoolInstance () {
216 return $this->poolInstance;
220 * Registeres the given socket resource for "this" listener instance. This
221 * will be done in a seperate class to allow package writers to use it
224 * @param $socketResource A valid server socket resource
226 * @throws InvalidServerSocketException If the given resource is no server socket
227 * @throws SocketAlreadyRegisteredException If the given resource is already registered
229 protected function registerServerSocketResource ($socketResource) {
230 // First check if it is valid
231 if (!$this->isServerSocketResource($socketResource)) {
233 throw new InvalidServerSocketException(array($this, $socketResource), self::EXCEPTION_INVALID_SOCKET);
234 } elseif ($this->isServerSocketRegistered($socketResource)) {
235 // Already registered
236 throw new SocketAlreadyRegisteredException($this, self::EXCEPTION_SOCKET_ALREADY_REGISTERED);
239 // Get a socket registry instance (singleton)
240 $registryInstance = SocketRegistryFactory::createSocketRegistryInstance();
242 // Register the socket
243 $registryInstance->registerSocket($this, $socketResource);
247 * Checks whether given socket resource is registered in socket registry
249 * @param $socketResource A valid server socket resource
250 * @return $isRegistered Whether given server socket is registered
252 protected function isServerSocketRegistered ($socketResource) {
253 // Get a socket registry instance (singleton)
254 $registryInstance = SocketRegistryFactory::createSocketRegistryInstance();
257 $isRegistered = $registryInstance->isSocketRegistered($this, $socketResource);
260 return $isRegistered;
264 * Getter for "this" socket resource
266 * @return $socketResource A valid socket resource
268 public final function getSocketResource () {
269 // Get a socket registry instance (singleton)
270 $registryInstance = SocketRegistryFactory::createSocketRegistryInstance();
272 // Get the socket resource
273 $socketResource = $registryInstance->getRegisteredSocketResource($this);
276 return $socketResource;
280 * Accepts the visitor to process the visit "request"
282 * @param $visitorInstance An instance of a Visitor class
285 public function accept (Visitor $visitorInstance) {
287 //* DEBUG: */ $this->debugOutput(strtoupper($this->getProtocol()) . '-LISTENER: ' . $visitorInstance->__toString() . ' has visited ' . $this->__toString() . ' - START');
289 // Visit this listener
290 $visitorInstance->visitListener($this);
292 // Visit the pool if set
293 if ($this->getPoolInstance() instanceof Poolable) {
294 $this->getPoolInstance()->accept($visitorInstance);
298 //* DEBUG: */ $this->debugOutput(strtoupper($this->getProtocol()) . '-LISTENER: ' . $visitorInstance->__toString() . ' has visited ' . $this->__toString() . ' - FINISHED');
302 * Monitors incoming raw data from the handler and transfers it to the
303 * given receiver instance. This method should not be called, please call
304 * the decorator's version instead to separator node/client traffic.
306 * @param $receiverInstance An instance of a Receivable class
308 * @throws UnsupportedOperatorException If this method is called by a mistake
310 public function monitorIncomingRawData (Receivable $receiverInstance) {
311 throw new UnsupportedOperationException(array($this, __FUNCTION__, $receiverInstance), self::EXCEPTION_UNSPPORTED_OPERATION);