每天laravel-20160701|Repository
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<?php namespace Illuminate\Cache; use Closure; use DateTime; use ArrayAccess; use Carbon\Carbon; use BadMethodCallException; use Illuminate\Contracts\Cache\Store; use Illuminate\Support\Traits\Macroable; use Illuminate\Contracts\Events\Dispatcher; use Illuminate\Contracts\Cache\Repository as CacheContract; // a namespace be used enough class Repository implements CacheContract, ArrayAccess {// two interface that should be implements by Repository use Macroable { __call as macroCall; }// use Macroable that we will be a __call /** * The cache store implementation. * The cache store * @var \Illuminate\Contracts\Cache\Store */ protected $store;// a Cache Store instance of the implementation /** * The event dispatcher implementation. * * @var \Illuminate\Contracts\Events\Dispatcher */ protected $events;// The event dispatcher implementation a events interface /** * The default number of minutes to store items. * * @var int */ protected $default = 60; // a normal time[minutes]or[seconds] to set the value into the store items . // normal set it is 60 second /** * Create a new cache repository instance. * * @param \Illuminate\Contracts\Cache\Store $store * @return void */ public function __construct(Store $store) { $this->store = $store; }// a big __set to Create a new instance about Cache, repository // a library to store. /** * Set the event dispatcher instance. * * @param \Illuminate\Contracts\Events\Dispatcher $events * @return void */ public function setEventDispatcher(Dispatcher $events) { $this->events = $events; }// Set the event dispatcher instance. // a big set to the events. /** * Fire an event for this cache instance. * * @param string $event * @param array $payload * @return void */ // Fire an event for this cache instance. protected function fireCacheEvent($event, $payload)// fire cache event { if (! isset($this->events)) { return; }// check this is a normal events switch ($event) {// this->events is a instance about a class, then the events is a way or a type case ‘hit‘:// case hit: if (count($payload) == 2) { $payload[] = []; } return $this->events->fire(new Events\CacheHit($payload[0], $payload[1], $payload[2])); case ‘missed‘:// case missed: if (count($payload) == 1) { $payload[] = []; } return $this->events->fire(new Events\CacheMissed($payload[0], $payload[1])); case ‘delete‘:// case delete: if (count($payload) == 1) { $payload[] = []; } return $this->events->fire(new Events\KeyForgotten($payload[0], $payload[1])); case ‘write‘:// cache write: if (count($payload) == 3) { $payload[] = []; } return $this->events->fire(new Events\KeyWritten($payload[0], $payload[1], $payload[2], $payload[3])); } }// a switch way to change the result /** * Determine if an item exists in the cache. * * @param string $key * @return bool */ public function has($key) { return ! is_null($this->get($key)); }// determine[check] the item has exists in the cache. /** * Retrieve an item from the cache by key. Retrieve an item from the cache by key. * * @param string $key * @param mixed $default * @return mixed */ public function get($key, $default = null)// get item by key. { if (is_array($key)) { return $this->many($key); }// the key is a array ,will back a item array by many. $value = $this->store->get($this->itemKey($key));// get item[value] by key if (is_null($value)) {// null the value $this->fireCacheEvent(‘missed‘, [$key]);//missed $value = value($default); } else { $this->fireCacheEvent(‘hit‘, [$key, $value]);// hit } return $value; } /** * Retrieve multiple items from the cache by key.// Retrieve multiple items from the cache * * Items not found in the cache will have a null value.// items not found in the cache will have a null value * * @param array $keys * @return array */ public function many(array $keys) { $normalizedKeys = []; foreach ($keys as $key => $value) { $normalizedKeys[] = is_string($key) ? $key : $value; } $values = $this->store->many($normalizedKeys); foreach ($values as $key => &$value) { if (is_null($value)) { $this->fireCacheEvent(‘missed‘, [$key]); $value = isset($keys[$key]) ? value($keys[$key]) : null; } else { $this->fireCacheEvent(‘hit‘, [$key, $value]); } } return $values; } // 2016-04-05 /** * Retrieve an item from the cache and delete it. * * @param string $key * @param mixed $default * @return mixed */ public function pull($key, $default = null)// Retrieve an item from the cache and delete it. {// like pop push , pull $value = $this->get($key, $default);// first we will get value by key $this->forget($key);// then forget the key, the same to delete the item by key return $value;// return the key } /** * Store an item in the cache. * * @param string $key * @param mixed $value * @param \DateTime|int $minutes * @return void */ public function put($key, $value, $minutes = null)// Store an item in the cache. { if (is_array($key) && filter_var($value, FILTER_VALIDATE_INT) !== false) { return $this->putMany($key, $value); }// if is a array and check the filter var has int, the return putMany $minutes = $this->getMinutes($minutes);// change minutes to you wants if (! is_null($minutes)) {// check has times [minutes] $this->store->put($this->itemKey($key), $value, $minutes);// put key $this->fireCacheEvent(‘write‘, [$key, $value, $minutes]);// fire cache event } }// to set a item in cache use a key /** * Store multiple items in the cache for a given number of minutes. * * @param array $values * @param int $minutes * @return void */ public function putMany(array $values, $minutes)// Store multiple item in the cache for a {// given number of minutes $minutes = $this->getMinutes($minutes);// get a normal time if (! is_null($minutes)) {// has time $this->store->putMany($values, $minutes);// use a api to set way foreach ($values as $key => $value) { $this->fireCacheEvent(‘write‘, [$key, $value, $minutes]); }// a long a way to check the write event } } /** * Store an item in the cache if the key does not exist. * * @param string $key * @param mixed $value * @param \DateTime|int $minutes * @return bool */ public function add($key, $value, $minutes)// Store an item in the cache if the key does not exist. {// add values by key in to the cache $minutes = $this->getMinutes($minutes);// get a minutes if (is_null($minutes)) { return false; }// no time no value if (method_exists($this->store, ‘add‘)) { return $this->store->add($this->itemKey($key), $value, $minutes); }// check has the add method, or done null if (is_null($this->get($key))) {// no value $this->put($key, $value, $minutes);// put a key and value return true; } return false; } /** * Store an item in the cache indefinitely. * * @param string $key * @param mixed $value * @return void */ public function forever($key, $value)// Store an item in the cache indefinitely { $this->store->forever($this->itemKey($key), $value);// use api to set the key forever $this->fireCacheEvent(‘write‘, [$key, $value, 0]);// send a event to } /** * Get an item from the cache, or store the default value. * * @param string $key * @param \DateTime|int $minutes * @param \Closure $callback * @return mixed */ // Get an item from the cache ,or store the default value. public function remember($key, $minutes, Closure $callback) { // If the item exists in the cache we will just return this immediately // otherwise we will execute the given Closure and cache the result // of that execution for the given number of minutes in storage. if (! is_null($value = $this->get($key))) { return $value; }// has the item then back it $this->put($key, $value = $callback(), $minutes);// set the return $value; }// a number to be remember /** * Get an item from the cache, or store the default value forever. * * @param string $key * @param \Closure $callback * @return mixed */ public function sear($key, Closure $callback) { return $this->rememberForever($key, $callback); }// Get an item from the cache, or store the default value forever // like a 38 women, has the key ,i use it,or i will set a default value,like kill it, // even a forever /** * Get an item from the cache, or store the default value forever. * Get an item from the cache, or store the * @param string $key * @param \Closure $callback * @return mixed */ // a method like sear ,means to remember Forever public function rememberForever($key, Closure $callback) { // If the item exists in the cache we will just return this immediately // otherwise we will execute the given Closure and cache the result // of that execution for the given number of minutes. It‘s easy. if (! is_null($value = $this->get($key))) { return $value; } $this->forever($key, $value = $callback()); return $value; }// if the item exists in the cache we will just return this immediately // otherwise we will execute the given Closure and cache the result of that execution for // the given of minutes ,it is easy /** * Remove an item from the cache. * * @param string $key * @return bool */ public function forget($key)// delete or remove or forget an item from the cache { $success = $this->store->forget($this->itemKey($key));// a api to forget $this->fireCacheEvent(‘delete‘, [$key]);// fire event deltet return $success;// get result, more time it is success! } /** * Begin executing a new tags operation if the store supports it. * * @param array|mixed $names * @return \Illuminate\Cache\TaggedCache * * @throws \BadMethodCallException */ public function tags($names)// Begin executing a new tags operation if the store supports it. { if (method_exists($this->store, ‘tags‘)) {// check has the method tags $taggedCache = $this->store->tags($names);// change the name to if (! is_null($this->events)) { $taggedCache->setEventDispatcher($this->events); } $taggedCache->setDefaultCacheTime($this->default); return $taggedCache;// set Default Cache then } throw new BadMethodCallException(‘This cache store does not support tagging.‘); } /** * Format the key for a cache item. * * @param string $key * @return string */ protected function itemKey($key) { return $key; }// Format the key for a cache item. but do nothing /** * Get the default cache time. * * @return int */ public function getDefaultCacheTime() { return $this->default;// a default about time }// Get the default cache time. /** * Set the default cache time in minutes. * * @param int $minutes * @return void */ public function setDefaultCacheTime($minutes) { $this->default = $minutes; }// Set the default cache time in minutes. /** * Get the cache store implementation. * * @return \Illuminate\Contracts\Cache\Store */ public function getStore() { return $this->store;// back an instance }// get the cache store implementation. /** * Determine if a cached value exists. * * @param string $key * @return bool */ public function offsetExists($key) { return $this->has($key);// check has a key }// Determine if a cached value exists /** * Retrieve an item from the cache by key. * * @param string $key * @return mixed */ public function offsetGet($key) { return $this->get($key); }// Retrieve an item from the cache by key. /** * Store an item in the cache for the default time. * * @param string $key * @param mixed $value * @return void */ public function offsetSet($key, $value) { $this->put($key, $value, $this->default); }// Store an item in the /** * Remove an item from the cache. * * @param string $key * @return void */ public function offsetUnset($key) { $this->forget($key); }// a remove an item from the cache. method /** * Calculate the number of minutes with the given duration. * * @param \DateTime|int $duration * @return int|null */ protected function getMinutes($duration) { if ($duration instanceof DateTime) { $fromNow = Carbon::now()->diffInMinutes(Carbon::instance($duration), false); return $fromNow > 0 ? $fromNow : null; } return is_string($duration) ? (int) $duration : $duration; }// Calculate the number of minutes with the given duration. // get time duration for a int times /** * Handle dynamic calls into macros or pass missing methods to the store. * Handle dynamic calls into macros or pass missing methods to the store. * @param string $method * @param array $parameters * @return mixed */ // dynamic calls into macros or pass missing methods public function __call($method, $parameters) { if (static::hasMacro($method)) { return $this->macroCall($method, $parameters); }// static:: method to check has a method return call_user_func_array([$this->store, $method], $parameters); }// call_user_func_array() /** * Clone cache repository instance. * * @return void */ public function __clone() { $this->store = clone $this->store; }// Clone cache repository instance. }
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