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;
34 * Used protocol (Default: invalid, which is indeed invalid...)
36 private $protocol = 'invalid';
39 * Address (IP mostly) we shall listen on
41 private $listenAddress = '0.0.0.0'; // This is the default and listens on all interfaces
44 * Port we shall listen on (or wait for incoming data)
46 private $listenPort = 0; // This port MUST be changed by your application
49 * Wether we are in blocking or non-blocking mode (default: non-blocking
51 private $blockingMode = false;
54 * A peer pool instance
56 private $poolInstance = NULL;
59 * Protected constructor
61 * @param $className Name of the class
64 protected function __construct ($className) {
65 // Call parent constructor
66 parent::__construct($className);
70 * Checks wether the given socket resource is a server socket
72 * @param $socketResource A valid socket resource
73 * @return $isServerSocket Wether the socket resource is a server socket
75 protected function isServerSocketResource ($socketResource) {
77 $isServerSocket = ((is_resource($socketResource)) && (!@socket_getpeername($socketResource, $peerName)));
79 // We need to clear the error here if it is a resource
80 if ($isServerSocket === true) {
82 //* DEBUG: */ $this->debugOutput('socketResource[]=' . gettype($socketResource));
83 socket_clear_error($socketResource);
86 // Check peer name, it must be empty
87 $isServerSocket = (($isServerSocket) && (empty($peerName)));
90 return $isServerSocket;
94 * Setter for listen address
96 * @param $listenAddress The address this listener should listen on
99 protected final function setListenAddress ($listenAddress) {
100 $this->listenAddress = (string) $listenAddress;
104 * Getter for listen address
106 * @return $listenAddress The address this listener should listen on
108 public final function getListenAddress () {
109 return $this->listenAddress;
113 * Setter for listen port
115 * @param $listenPort The port this listener should listen on
118 protected final function setListenPort ($listenPort) {
119 $this->listenPort = (int) $listenPort;
123 * Getter for listen port
125 * @return $listenPort The port this listener should listen on
127 public final function getListenPort () {
128 return $this->listenPort;
132 * Getter for port number to satify ProtocolHandler
134 * @return $port The port number
136 public final function getPort () {
137 return $this->getListenPort();
141 * "Setter" to set listen address from configuration entry
143 * @param $configEntry The configuration entry holding our listen address
146 public final function setListenAddressByConfiguration ($configEntry) {
147 $this->setListenAddress($this->getConfigInstance()->getConfigEntry($configEntry));
151 * "Setter" to set listen port from configuration entry
153 * @param $configEntry The configuration entry holding our listen port
156 public final function setListenPortByConfiguration ($configEntry) {
157 $this->setListenPort($this->getConfigInstance()->getConfigEntry($configEntry));
161 * Setter for protocol
163 * @param $protocol Used protocol
166 protected final function setProtocol ($protocol) {
167 $this->protocol = (string) $protocol;
171 * Getter for protocol
173 * @return $protocol Used protocol
175 public final function getProtocol () {
176 return $this->protocol;
180 * Setter for blocking-mode
182 * @param $blockingMode Wether blocking-mode is disabled (default) or enabled
185 protected final function setBlockingMode ($blockingMode) {
186 $this->blockingMode = (boolean) $blockingMode;
190 * Checks wether blocking-mode is enabled or disabled
192 * @return $blockingMode Wether blocking mode is disabled or enabled
194 public final function isBlockingModeEnabled () {
195 return $this->blockingMode;
199 * Setter for peer pool instance
201 * @param $poolInstance The peer pool instance we shall set
204 protected final function setPoolInstance (PoolablePeer $poolInstance) {
205 $this->poolInstance = $poolInstance;
209 * Getter for peer pool instance
211 * @return $poolInstance The peer pool instance we shall set
213 public final function getPoolInstance () {
214 return $this->poolInstance;
218 * Registeres the given socket resource for "this" listener instance. This
219 * will be done in a seperate class to allow package writers to use it
222 * @param $socketResource A valid server socket resource
224 * @throws InvalidServerSocketException If the given resource is no server socket
225 * @throws SocketAlreadyRegisteredException If the given resource is already registered
227 protected function registerServerSocketResource ($socketResource) {
228 // First check if it is valid
229 if (!$this->isServerSocketResource($socketResource)) {
231 throw new InvalidServerSocketException(array($this, $socketResource), self::EXCEPTION_INVALID_SOCKET);
232 } elseif ($this->isServerSocketRegistered($socketResource)) {
233 // Already registered
234 throw new SocketAlreadyRegisteredException($this, self::EXCEPTION_SOCKET_ALREADY_REGISTERED);
237 // Get a socket registry instance (singleton)
238 $registryInstance = SocketRegistryFactory::createSocketRegistryInstance();
240 // Register the socket
241 $registryInstance->registerSocket($this, $socketResource);
245 * Checks wether given socket resource is registered in socket registry
247 * @param $socketResource A valid server socket resource
248 * @return $isRegistered Wether given server socket is registered
250 protected function isServerSocketRegistered ($socketResource) {
251 // Get a socket registry instance (singleton)
252 $registryInstance = SocketRegistryFactory::createSocketRegistryInstance();
255 $isRegistered = $registryInstance->isSocketRegistered($this, $socketResource);
258 return $isRegistered;
262 * Getter for "this" socket resource
264 * @return $socketResource A valid socket resource
266 public final function getSocketResource () {
267 // Get a socket registry instance (singleton)
268 $registryInstance = SocketRegistryFactory::createSocketRegistryInstance();
270 // Get the socket resource
271 $socketResource = $registryInstance->getRegisteredSocketResource($this);
274 return $socketResource;
278 * Accepts the visitor to process the visit "request"
280 * @param $visitorInstance An instance of a Visitor class
283 public function accept (Visitor $visitorInstance) {
285 //* DEBUG: */ $this->debugOutput(strtoupper($this->getProtocol()) . '-LISTENER: ' . $visitorInstance->__toString() . ' has visited ' . $this->__toString() . ' - START');
287 // Visit this listener
288 $visitorInstance->visitListener($this);
290 // Visit the pool if set
291 if ($this->getPoolInstance() instanceof Poolable) {
292 $this->getPoolInstance()->accept($visitorInstance);
296 //* DEBUG: */ $this->debugOutput(strtoupper($this->getProtocol()) . '-LISTENER: ' . $visitorInstance->__toString() . ' has visited ' . $this->__toString() . ' - FINISHED');
300 * Monitors incoming raw data from the handler and transfers it to the
301 * given receiver instance. This method should not be called, please call
302 * the decorator's version instead to separator node/client traffic.
304 * @param $receiverInstance An instance of a Receivable class
306 * @throws UnsupportedOperatorException If this method is called by a mistake
308 public function monitorIncomingRawData (Receivable $receiverInstance) {
309 throw new UnsupportedOperationException(array($this, __FUNCTION__, $receiverInstance), self::EXCEPTION_UNSPPORTED_OPERATION);