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? ??? ?? PHP ???? PHP? ??? memcached ??? ???

PHP? ??? memcached ??? ???

Jul 25, 2016 am 08:43 AM
  1. /*
  2. * memcache ??? ???
  3. * ?? ????? ?? ?? ?? ? ?? ??
  4. * ?? ?? ??, AB ?? ?? ??
  5. * @author guoyu
  6. * @create on 9:25 2014-9-28
  7. * @qq ???? ??? : 136112330
  8. *
  9. * @?:
  10. * $obj = new memcacheQueue('duilie');
  11. * $obj->add('1asdf')
  12. * $obj->getQueueLength(); read(11); * $obj->get(8);
  13. */
  15. class memcacheQueue{
  16. public static $client
  17. public $access; //? ???? ?? ??
  18. private $currentSide; //?? ??? ? ?: A/B
  19. private $lastSide; //?? ??? ? ?: A/ B
  20. private $sideAHead; //A?? ? ?? ?
  21. private $sideATail; //A?? ??? ?
  22. private $sideBHead; //B?? ? ?? ?
  23. private $sideBTail; // B?? ??? ?
  24. private $currentHead; //?? ?? ? ?? ?
  25. private $currentTail; //?? ?? ??? ?
  26. private $lastHead; > private $ lastTail; //?? ??? ???? ?? ?
  27. private $expire; //?? ??, ?, 1~2592000, ? 30? ???? ???? ??? ?????.
  28. private $ sleepTime; //?? ?? ?? ??, ?????
  29. private $queueName; //? ??, ?? ?
  30. private $retryNum; //??? ??, = 10 * ???? ??? ?
  32. const MAXNUM = 2000; //(??) ?? ??? ?, ?? ??? 10K???.
  33. const HEAD_KEY = '_lkkQueueHead_' // ??? ?? ?
  34. const TAIL_KEY = '_lkkQueueTail_' // ??? ?? ?
  35. const VALU_KEY = '_lkkQueueValu_'; // ??? ? ?
  36. const LOCK_KEY = '_lkkQueueLock_' // ??? ?? ?
  37. const SIDE_KEY = '_lkkQueueSide_' // ?? ?? ?
  39. /*
  40. * ???
  41. * @param [config] ?? memcache ?? ????
  42. * @param [queueName] ??? ??? ??
  43. * @param [expire] ??? ?? ??
  44. * @return NULL
  45. */
  46. ?? ?? __construct($queueName ='',$expire='',$config =''){
  47. if(empty($config)){
  48. self::$client = memcache_pconnect('localhost',11211 );
  49. }elseif(is_array($config)){//array('host'=>'127.0.0.1','port'=> ;'11211')
  50. self::$client = memcache_pconnect($config['host'],$config['port'])
  51. }elseif(is_string($config)){//"127.0 .0.1:11211"
  52. $tmp = ??(' :',$config);
  53. $conf['host'] = isset($tmp[0]) ? $tmp[0] : '127.0. 0.1';
  54. $conf['port'] = isset($tmp[1]) ? $tmp[1] : '11211'
  55. self::$client($conf['host') ],$conf['port']);
  56. }
  57. if(!self::$client) return false
  59. ignore_user_abort(TRUE);//????? ??? ???? ??? ?????. ??
  60. set_time_limit(0);//???? ?? ?? ??
  62. $this->access = false
  63. $this->sleepTime = 1000; = (?? ??($expire) && $expire!=0) ? 3600 : (int)$expire;
  64. $this->expire = $expire; ??> $this->retryNum = 10000;
  66. $side = memcache_add(self::$client, $queueName . self::SIDE_KEY, 'A',false, $expire)
  67. $ this->getHeadNTail($queueName);
  68. if (!isset($this->sideAHead) || ?? ??($this->sideAHead)) $this->sideAHead = 0; (!isset($this->sideATail) || ?? ?? ($this->sideATail)) $this->sideATail = 0
  69. if(!isset($this->sideBHead) || ?? ?? ($this->sideBHead)) $this-> sideBHead = 0
  70. if(!isset($this->sideBHead) || ?? ??($this->sideBHead)) $this-> sideBHead = 0
  71. }
  73. /*
  74. * 獲取隊(duì)列首尾值
  75. * @param [queueName] string 隊(duì)列name稱
  76. * @return NULL
  77. */
  78. ??? ?? getHeadNTail($queueName) {
  79. $this->sideAHead = (int)memcache_get(self::$client, $queueName.'A'.self::HEAD_KEY);
  80. $this->sideATail = (int)memcache_get(self::$client, $queueName.'A'.self::TAIL_KEY);
  81. $this->sideBHead = (int)memcache_get(self::$client, $queueName.'B'.self::HEAD_KEY);
  82. $this->sideBTail = (int)memcache_get(self::$client, $queueName.'B'.self::TAIL_KEY);
  83. }
  85. /*
  86. * 獲取當(dāng)前輪值的隊(duì)列?
  87. * @return string 隊(duì)列??稱
  88. */
  89. ?? ?? getCurrentSide(){
  90. $ currentSide = memcache_get(self::$client, $this->queueName . self::SIDE_KEY);
  91. if($currentSide == 'A'){
  92. $this->currentSide = 'A';
  93. $this->lastSide = 'B';
  95. $this->currentHead = $this->sideAHead;
  96. $this->currentTail = $this->sideATail;
  97. $this->lastHead = $this->sideBHead;
  98. $this->lastTail = $this->sideBTail;
  99. }else{
  100. $this->currentSide = 'B';
  101. $this->lastSide = 'A';
  103. $this->currentHead = $this->sideBHead;
  104. $this->currentTail = $this->sideBTail;
  105. $this->lastHead = $this->sideAHead;
  106. $this->lastTail = $this->sideATail;
  107. }
  109. return $this->currentSide;
  110. }
  112. /*
  113. * 隊(duì)列加鎖
  114. * @return boolean
  115. */
  116. ??? ?? getLock(){
  117. if($this-> access === false){
  118. while(!memcache_add(self::$client, $this->queueName .self::LOCK_KEY, 1, false, $this->expire) ){
  119. usleep ($this->sleepTime);
  120. @$i ;
  121. if($i > $this->retryNum){//嘗試等待N次
  122. return false;
  123. ??;
  124. }
  125. }
  126. return $this->access = true;
  127. }
  128. false? ?????.
  129. }
  131. /*
  132. * 隊(duì)列解鎖
  133. * @return NULL
  134. */
  135. ??? ?? unLock(){
  136. memcache_delete(self::$client, $this->queueName .self::LOCK_KEY);
  137. $this->access = false;
  138. }
  140. /*
  141. * 添加數(shù)據(jù)
  142. * @param [data] 要存儲(chǔ)的值
  143. * @return boolean
  144. */
  145. ?? ?? add( $data){
  146. $result = false;
  147. if(!$this->getLock()){
  148. return $result;
  149. }
  150. $this->getHeadNTail($this->queueName);
  151. $this->getCurrentSide();
  153. if($this->isFull()){
  154. $this->unLock();
  155. false? ?????.
  156. }
  158. if($this->currentTail < self::MAXNUM){
  159. $value_key = $this->queueName .$this->currentSide . ??::VALU_KEY . $this->currentTail;
  160. if(memcache_add(self::$client, $value_key, $data, false, $this->expire)){
  161. $this->changeTail();
  162. $?? = ?;
  163. }
  164. }else{//當(dāng)前隊(duì)列已滿,更換輪值面
  165. $this->unLock();
  166. $this->changeCurrentSide();
  167. return $this->add($data);
  168. }
  170. $this->unLock();
  171. $?? ??;
  172. }
  174. /*
  175. * 取出數(shù)據(jù)
  176. * @param [length] int 數(shù)據(jù)的長titude
  177. * @return ??
  178. */
  179. ?? ?? get( $length=0){
  180. if(!is_numeric($length)) return false;
  181. if(empty($length)) $length = self::MAXNUM * 2;//默認(rèn)讀取所有
  182. if(!$this->getLock()) return false;
  184. if($this->isEmpty()){
  185. $this->unLock();
  186. false? ?????.
  187. }
  189. $keyArray = $this->getKeyArray($length);
  190. $lastKey = $keyArray['lastKey'];
  191. $currentKey = $keyArray['currentKey'];
  192. $keys = $keyArray['keys'];
  193. $this->changeHead($this->lastSide,$lastKey);
  194. $this->changeHead($this->currentSide,$currentKey);
  196. $data = @memcache_get(self::$client, $keys);
  197. foreach($keys as $v){//??后刪除
  198. @memcache_delete(self::$client, $v, 0);
  199. }
  200. $this->unLock();
  202. $data? ?????.
  203. }
  205. /*
  206. * 讀取數(shù)據(jù)
  207. * @param [length] int 數(shù)據(jù)的長島
  208. * @return ??
  209. */
  210. ?? ?? ?? ($length=0){
  211. if(!is_numeric($length)) return false;
  212. if(empty($length)) $length = self::MAXNUM * 2;//默認(rèn)讀取所有
  213. $keyArray = $this->getKeyArray($length);
  214. $data = @memcache_get(self::$client, $keyArray['keys']);
  215. $data? ?????.
  216. }
  218. /*
  219. * 獲取隊(duì)列某段長島的key數(shù)組
  220. * @param [length] int 隊(duì)列長島
  221. * @return ??
  222. */
  223. ?? ?? getKeyArray($length){
  224. $result = array('keys'=>array(),'lastKey'=>array(),'currentKey'=>array());
  225. $this->getHeadNTail($this->queueName);
  226. $this->getCurrentSide();
  227. if(empty($length)) return $result;
  229. //?? ?
  230. $i = $result['lastKey'] = 0;
  231. for($i=0;$i<$length;$i ){
  232. $result['lastKey'] = $this->lastHead $i;
  233. if($result['lastKey'] >= $this->lastTail) break;
  234. $result['keys'][] = $this->queueName .$this->lastSide . ??::VALU_KEY . $result['lastKey'];
  235. }
  237. //再取當(dāng)??? ?
  238. $j = $length - $i;
  239. $k = $result['currentKey'] = 0;
  240. for($k=0;$k<$j;$k ){
  241. $result['currentKey'] = $this->currentHead $k;
  242. if($result['currentKey'] >= $this->currentTail) break;
  243. $result['keys'][] = $this->queueName .$this->currentSide . ??::VALU_KEY . $result['???'];
  244. }
  246. $result ??;
  247. }
  249. /*
  250. * 更新當(dāng)前輪值?隊(duì)列尾?值
  251. * @return NULL
  252. */
  253. ??? ??changeTail(){
  254. $tail_key = $this->queueName .$this->currentSide . ??::TAIL_KEY;
  255. memcache_add(self::$client, $tail_key, 0,false, $this->expire);//如果沒有,則插入;有則false;
  256. //memcache_increment(self::$client, $tail_key, 1);//隊(duì)列尾 1
  257. $v = memcache_get(self::$client, $tail_key) 1;
  258. memcache_set(self::$client, $tail_key,$v,false,$this->expire);
  259. }
  261. /*
  262. * 更新隊(duì)列首?值
  263. * @param [side] string 要更新的面
  264. * @param [headValue] int 隊(duì)列首的值
  265. * @return NULL
  266. */
  267. ??? ??changeHead($side,$headValue){
  268. if($headValue < 1) return false;
  269. $head_key = $this->queueName .$side . ??::HEAD_KEY;
  270. $tail_key = $this->queueName .$side . ??::TAIL_KEY;
  271. $sideTail = memcache_get(self::$client, $tail_key);
  272. if($headValue < $sideTail){
  273. memcache_set(self::$client, $head_key,$headValue 1,false,$this->expire);
  274. }elseif($headValue >= $sideTail){
  275. $this->resetSide($side);
  276. }
  277. }
  279. /*
  280. * ? ??? ??
  281. * @return NULL
  282. */
  283. ?? ?? ResetSide($side){
  284. $head_key = $this->queueName .$side . ??::HEAD_KEY;
  285. $tail_key = $this->queueName .$side . ??::TAIL_KEY;
  286. memcache_set(self::$client, $head_key,0,false,$this->expire);
  287. memcache_set(self::$client, $tail_key,0,false,$this->expire);
  288. }
  290. /*
  291. * 改變當(dāng)前輪值隊(duì)列?
  292. * @return string
  293. */
  294. private functionchangeCurrentSide(){
  295. $currentSide = memcache_get(self::$ ?????, $this->queueName .self::SIDE_KEY);
  296. if($currentSide == 'A'){
  297. memcache_set(self::$client, $this->queueName . self::SIDE_KEY,'B',false,$this->expire) ;
  298. $this->currentSide = 'B';
  299. }else{
  300. memcache_set(self::$client, $this->queueName . self::SIDE_KEY,'A',false,$this->expire);
  301. $this->currentSide = 'A';
  302. }
  303. return $this->currentSide;
  304. }
  306. /*
  307. * 檢查當(dāng)前隊(duì)列是否已滿
  308. * @return boolean
  309. */
  310. public function isFull(){
  311. $result = false ;
  312. if($this->sideATail == self::MAXNUM && $this->sideBTail == self::MAXNUM){
  313. $result = true;
  314. }
  315. $result ??;
  316. }
  318. /*
  319. * 檢查當(dāng)前隊(duì)列是否為空
  320. * @return boolean
  321. */
  322. public function isEmpty(){
  323. $result = true ;
  324. if($this->sideATail > 0 || $this->sideBTail > 0){
  325. $result = false;
  326. }
  327. $result ??;
  328. }
  330. /*
  331. * 獲取當(dāng)前隊(duì)列? ??
  332. * 該長島為理論長島，某些元素由于過期失效而丟失，真實(shí)?? 小于或等于該長島
  333. * @return int
  334. */
  335. ?? ?? getQueueLength(){
  336. $this->getHeadNTail($this->queueName);
  337. $this->getCurrentSide();
  339. $sideALength = $this->sideATail - $this->sideAHead;
  340. $sideBLength = $this->sideBTail - $this->sideBHead;
  341. $result = $sideALength $sideBLength;
  343. $result? ?????.
  344. }
  346. /*
  347. * 清空當(dāng)前隊(duì)列數(shù)據(jù),僅保留HEAD_KEY、TAIL_KEY、SIDE_KEY??key
  348. * @return boolean
  349. */
  350. ?? ?? ???( ){
  351. if(!$this->getLock()) return false;
  352. for($i=0;$i @memcache_delete(self::$client, $this->queueName.'A'.self::VALU_KEY . $i, 0);
  353. @memcache_delete(self::$client, $this->queueName.'B'.self::VALU_KEY .$i, 0);
  354. }
  355. $this->unLock();
  356. $this->resetSide('A');
  357. $this->resetSide('B');
  358. true? ?????.
  359. }
  361. /*
  362. * 清除所有memcache緩存數(shù)據(jù)
  363. * @return NULL
  364. */
  365. ?? ?? memFlush(){
  366. memcache_flush(self:: $?????);
  367. }
  369. }
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