1: <?php
2:
3: 4: 5: 6: 7: 8: 9: 10: 11:
12:
13:
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24: class Cache extends Object implements ArrayAccess
25: {
26:
27: const PRIORITY = 'priority',
28: EXPIRATION = 'expire',
29: EXPIRE = 'expire',
30: SLIDING = 'sliding',
31: TAGS = 'tags',
32: FILES = 'files',
33: ITEMS = 'items',
34: CONSTS = 'consts',
35: CALLBACKS = 'callbacks',
36: ALL = 'all';
37:
38:
39: const NAMESPACE_SEPARATOR = "\x00";
40:
41:
42: private $storage;
43:
44:
45: private $namespace;
46:
47:
48: private $key;
49:
50:
51: private $data;
52:
53:
54:
55: public function __construct(ICacheStorage $storage, $namespace = NULL)
56: {
57: $this->storage = $storage;
58: $this->namespace = $namespace . self::NAMESPACE_SEPARATOR;
59: }
60:
61:
62:
63: 64: 65: 66:
67: public function getStorage()
68: {
69: return $this->storage;
70: }
71:
72:
73:
74: 75: 76: 77:
78: public function getNamespace()
79: {
80: return (string) substr($this->namespace, 0, -1);
81: }
82:
83:
84:
85: 86: 87: 88: 89:
90: public function derive($namespace)
91: {
92: $derived = new self($this->storage, $this->namespace . $namespace);
93: return $derived;
94: }
95:
96:
97:
98: 99: 100: 101: 102: 103:
104: public function load($key, $fallback = NULL)
105: {
106: $data = $this->storage->read($this->generateKey($key));
107: if ($data === NULL && $fallback) {
108: return $this->save($key, new Callback($fallback));
109: }
110: return $data;
111: }
112:
113:
114:
115: 116: 117: 118: 119: 120: 121: 122: 123: 124: 125: 126: 127: 128: 129: 130: 131:
132: public function save($key, $data, array $dp = NULL)
133: {
134: $this->release();
135: $key = $this->generateKey($key);
136:
137: if ($data instanceof Callback || $data instanceof Closure) {
138: $this->storage->lock($key);
139: $data = Callback::create($data)->invokeArgs(array(&$dp));
140: }
141:
142: if ($data === NULL) {
143: $this->storage->remove($key);
144: } else {
145: $this->storage->write($key, $data, $this->completeDependencies($dp, $data));
146: return $data;
147: }
148: }
149:
150:
151:
152: private function completeDependencies($dp, $data)
153: {
154: if (is_object($data)) {
155: $dp[self::CALLBACKS][] = array(array(__CLASS__, 'checkSerializationVersion'), get_class($data),
156: ClassReflection::from($data)->getAnnotation('serializationVersion'));
157: }
158:
159:
160: if (isset($dp[Cache::EXPIRATION])) {
161: $dp[Cache::EXPIRATION] = DateTime53::from($dp[Cache::EXPIRATION])->format('U') - time();
162: }
163:
164:
165: if (isset($dp[self::FILES])) {
166:
167: foreach (array_unique((array) $dp[self::FILES]) as $item) {
168: $dp[self::CALLBACKS][] = array(array(__CLASS__, 'checkFile'), $item, @filemtime($item));
169: }
170: unset($dp[self::FILES]);
171: }
172:
173:
174: if (isset($dp[self::ITEMS])) {
175: $dp[self::ITEMS] = array_unique(array_map(array($this, 'generateKey'), (array) $dp[self::ITEMS]));
176: }
177:
178:
179: if (isset($dp[self::CONSTS])) {
180: foreach (array_unique((array) $dp[self::CONSTS]) as $item) {
181: $dp[self::CALLBACKS][] = array(array(__CLASS__, 'checkConst'), $item, constant($item));
182: }
183: unset($dp[self::CONSTS]);
184: }
185:
186: if (!is_array($dp)) {
187: $dp = array();
188: }
189: return $dp;
190: }
191:
192:
193:
194: 195: 196: 197: 198:
199: public function remove($key)
200: {
201: $this->save($key, NULL);
202: }
203:
204:
205:
206: 207: 208: 209: 210: 211: 212: 213: 214: 215:
216: public function clean(array $conds = NULL)
217: {
218: $this->release();
219: $this->storage->clean((array) $conds);
220: }
221:
222:
223:
224: 225: 226: 227: 228:
229: public function call($function)
230: {
231: $key = func_get_args();
232: return $this->load($key, create_function('', 'extract($GLOBALS[0]['.array_push($GLOBALS[0], array('function'=>$function,'key'=> $key)).'-1], EXTR_REFS);
233: array_shift($key);
234: return Callback::create($function)->invokeArgs($key);
235: '));
236: }
237:
238:
239:
240: 241: 242: 243: 244: 245:
246: public function wrap($function, array $dp = NULL)
247: {
248: $cache = $this;
249: return create_function('', 'extract($GLOBALS[0]['.array_push($GLOBALS[0], array('cache'=>$cache,'function'=> $function,'dp'=> $dp)).'-1], EXTR_REFS);
250: $_args=func_get_args(); $key = array($function, $_args);
251: $data = $cache->load($key);
252: if ($data === NULL) {
253: $data = $cache->save($key, Callback::create($function)->invokeArgs($key[1]), $dp);
254: }
255: return $data;
256: ');
257: }
258:
259:
260:
261: 262: 263: 264: 265:
266: public function start($key)
267: {
268: $data = $this->load($key);
269: if ($data === NULL) {
270: return new CachingHelper($this, $key);
271: }
272: echo $data;
273: }
274:
275:
276:
277: 278: 279: 280: 281: 282:
283: protected function generateKey($key)
284: {
285: return $this->namespace . md5(is_scalar($key) ? $key : serialize($key));
286: }
287:
288:
289:
290:
291:
292:
293:
294: 295: 296: 297: 298: 299: 300:
301: public function offsetSet($key, $data)
302: {
303: $this->save($key, $data);
304: }
305:
306:
307:
308: 309: 310: 311: 312: 313:
314: public function offsetGet($key)
315: {
316: $key = is_scalar($key) ? (string) $key : serialize($key);
317: if ($this->key !== $key) {
318: $this->key = $key;
319: $this->data = $this->load($key);
320: }
321: return $this->data;
322: }
323:
324:
325:
326: 327: 328: 329: 330: 331:
332: public function offsetExists($key)
333: {
334: $this->release();
335: return $this->offsetGet($key) !== NULL;
336: }
337:
338:
339:
340: 341: 342: 343: 344: 345:
346: public function offsetUnset($key)
347: {
348: $this->save($key, NULL);
349: }
350:
351:
352:
353: 354: 355: 356:
357: public function release()
358: {
359: $this->key = $this->data = NULL;
360: }
361:
362:
363:
364:
365:
366:
367:
368: 369: 370: 371: 372:
373: public static function checkCallbacks($callbacks)
374: {
375: foreach ($callbacks as $callback) {
376: $func = array_shift($callback);
377: if (!call_user_func_array($func, $callback)) {
378: return FALSE;
379: }
380: }
381: return TRUE;
382: }
383:
384:
385:
386: 387: 388: 389: 390: 391:
392: private static function checkConst($const, $value)
393: {
394: return defined($const) && constant($const) === $value;
395: }
396:
397:
398:
399: 400: 401: 402: 403: 404:
405: private static function checkFile($file, $time)
406: {
407: return @filemtime($file) == $time;
408: }
409:
410:
411:
412: 413: 414: 415: 416: 417:
418: private static function checkSerializationVersion($class, $value)
419: {
420: return ClassReflection::from($class)->getAnnotation('serializationVersion') === $value;
421: }
422:
423: }
424: