3 * A general hub cruncher class
5 * @author Roland Haeder <webmaster@shipsimu.org>
7 * @copyright Copyright (c) 2011 - 2012 Cruncher Developer Team
8 * @license GNU GPL 3.0 or any newer version
9 * @link http://www.shipsimu.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 abstract class BaseHubCruncher extends BaseHubSystem implements Updateable {
28 private $version = 'x.x';
31 * By default no cruncher is active
33 private $isActive = FALSE;
36 * All buffer queue instances (a FIFO)
38 private $bufferInstance = NULL;
41 * Stacker name for incoming queue
43 const STACKER_NAME_IN_QUEUE = 'in_queue';
46 * Stacker name for outcoming queue
48 const STACKER_NAME_OUT_QUEUE = 'out_queue';
51 * Protected constructor
53 * @param $className Name of the class
56 protected function __construct ($className) {
57 // Call parent constructor
58 parent::__construct($className);
61 $this->initCruncher();
65 * Initialize the cruncher generically
69 private function initCruncher () {
71 CruncherStateFactory::createCruncherStateInstanceByName('init', $this);
77 * @return $version Version number of this cruncher
79 protected final function getVersion () {
80 return $this->version;
86 * @param $version Version number of this cruncher
89 protected final function setVersion ($version) {
90 $this->version = (string) $version;
94 * Checks whether the in-buffer queue is filled by comparing it's current
95 * amount of entries against a threshold.
97 * @return $isFilled Whether the in-buffer is filled
99 protected function isInBufferQueueFilled () {
101 $isFilled = ($this->bufferInstance->getStackCount(self::STACKER_NAME_IN_QUEUE) > $this->getConfigInstance()->getConfigEntry('cruncher_in_buffer_min_threshold'));
103 // And return the result
108 * This method fills the in-buffer with (a) test unit(s) which are mainly
109 * used for development of the crunching part. They must be enabled in
110 * configuration, or else your cruncher runs out of WUs and waits for more
113 * In this method we already know that the in-buffer is going depleted so
114 * we don't need to double-check it here.
118 abstract protected function fillInBufferQueueWithTestUnits ();
121 * This method fills the in-buffer with (real) WUs which will be crunched
122 * and the result be sent back to the key producer instance.
126 abstract protected function fillInBufferQueueWithWorkUnits ();
129 * Enables/disables the cruncher (just sets a flag)
131 * @param $version Version number of this cruncher
134 public final function enableIsActive ($isActive = TRUE) {
135 $this->isActive = (bool) $isActive;
139 * Determines whether the cruncher is active
141 * @return $isActive Whether the cruncher is active
143 public final function isActive () {
144 return $this->isActive;
148 * Initializes all buffer queues (mostly in/out). This method is demanded
149 * by the CruncherHelper interface.
153 public function initBufferQueues () {
155 * Initialize both buffer queues, we can use the FIFO class here
156 * directly and encapsulate its method calls with protected methods.
158 $this->bufferInstance = ObjectFactory::createObjectByConfiguredName('cruncher_buffer_stacker_class');
160 // Initialize common stackers, like in/out
161 $this->bufferInstance->initStacks(array(
162 self::STACKER_NAME_IN_QUEUE,
163 self::STACKER_NAME_OUT_QUEUE
166 // Output debug message
167 self::createDebugInstance(__CLASS__)->debugOutput('CRUNCHER: All buffers are now initialized.');
171 * This method determines if the in-buffer is going to depleted and if so,
172 * it fetches more WUs from the network. If no WU can be fetched from the
173 * network and if enabled, a random test WU is being generated.
175 * This method is demanded from the CruncherHelper interface.
179 public function doFetchWorkUnits () {
180 // Simply check if we have enough WUs left in the in-buffer queue (a FIFO)
181 if (!$this->isInBufferQueueFilled()) {
182 // The in-buffer queue needs filling, so head out and get some work
183 $this->fillInBufferQueueWithWorkUnits();
185 // Is the buffer still not filled and are test-packages allowed?
186 if ((!$this->isInBufferQueueFilled()) && ($this->getConfigInstance()->getConfigEntry('cruncher_test_units_enabled') == 'Y')) {
187 // Then fill the in-buffer with (one) test-unit(s)
188 $this->fillInBufferQueueWithTestUnits();
194 * Updates a given field with new value
196 * @param $fieldName Field to update
197 * @param $fieldValue New value to store
199 * @throws DatabaseUpdateSupportException If this class does not support database updates
200 * @todo Try to make this method more generic so we can move it in BaseFrameworkSystem
202 public function updateDatabaseField ($fieldName, $fieldValue) {
204 $this->partialStub('Unfinished!');