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PHP LoadBalancer::openConnection方法代码示例

本文整理汇总了PHP中LoadBalancer::openConnection方法的典型用法代码示例。如果您正苦于以下问题:PHP LoadBalancer::openConnection方法的具体用法?PHP LoadBalancer::openConnection怎么用?PHP LoadBalancer::openConnection使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在LoadBalancer的用法示例。


在下文中一共展示了LoadBalancer::openConnection方法的4个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的PHP代码示例。

示例1: getLagTimes

 public function getLagTimes($serverIndexes, $wiki)
 {
     if (count($serverIndexes) == 1 && reset($serverIndexes) == 0) {
         // Single server only, just return zero without caching
         return array(0 => 0);
     }
     $expiry = 5;
     $requestRate = 10;
     $cache = $this->cache;
     $masterName = $this->parent->getServerName(0);
     $memcKey = wfMemcKey('lag_times', $masterName);
     $times = $cache->get($memcKey);
     if (is_array($times)) {
         # Randomly recache with probability rising over $expiry
         $elapsed = time() - $times['timestamp'];
         $chance = max(0, ($expiry - $elapsed) * $requestRate);
         if (mt_rand(0, $chance) != 0) {
             unset($times['timestamp']);
             // hide from caller
             return $times;
         }
         wfIncrStats('lag_cache.miss.expired');
     } else {
         wfIncrStats('lag_cache.miss.absent');
     }
     # Cache key missing or expired
     if ($cache->lock($memcKey, 0, 10)) {
         # Let this process alone update the cache value
         $unlocker = new ScopedCallback(function () use($cache, $memcKey) {
             $cache->unlock($memcKey);
         });
     } elseif (is_array($times)) {
         # Could not acquire lock but an old cache exists, so use it
         unset($times['timestamp']);
         // hide from caller
         return $times;
     }
     $times = array();
     foreach ($serverIndexes as $i) {
         if ($i == 0) {
             # Master
             $times[$i] = 0;
         } elseif (false !== ($conn = $this->parent->getAnyOpenConnection($i))) {
             $times[$i] = $conn->getLag();
         } elseif (false !== ($conn = $this->parent->openConnection($i, $wiki))) {
             $times[$i] = $conn->getLag();
             // Close the connection to avoid sleeper connections piling up.
             // Note that the caller will pick one of these DBs and reconnect,
             // which is slightly inefficient, but this only matters for the lag
             // time cache miss cache, which is far less common that cache hits.
             $this->parent->closeConnection($conn);
         }
     }
     # Add a timestamp key so we know when it was cached
     $times['timestamp'] = time();
     $cache->set($memcKey, $times, $expiry + 10);
     unset($times['timestamp']);
     // hide from caller
     return $times;
 }
开发者ID:GoProjectOwner,项目名称:mediawiki,代码行数:60,代码来源:LoadMonitor.php

示例2: getLagTimes

 public function getLagTimes($serverIndexes, $wiki)
 {
     if (count($serverIndexes) == 1 && reset($serverIndexes) == 0) {
         // Single server only, just return zero without caching
         return array(0 => 0);
     }
     $section = new ProfileSection(__METHOD__);
     $expiry = 5;
     $requestRate = 10;
     global $wgMemc;
     if (empty($wgMemc)) {
         $wgMemc = wfGetMainCache();
     }
     $masterName = $this->parent->getServerName(0);
     $memcKey = wfMemcKey('lag_times', $masterName);
     $times = $wgMemc->get($memcKey);
     if (is_array($times)) {
         # Randomly recache with probability rising over $expiry
         $elapsed = time() - $times['timestamp'];
         $chance = max(0, ($expiry - $elapsed) * $requestRate);
         if (mt_rand(0, $chance) != 0) {
             unset($times['timestamp']);
             // hide from caller
             return $times;
         }
         wfIncrStats('lag_cache_miss_expired');
     } else {
         wfIncrStats('lag_cache_miss_absent');
     }
     # Cache key missing or expired
     if ($wgMemc->add("{$memcKey}:lock", 1, 10)) {
         # Let this process alone update the cache value
         $unlocker = new ScopedCallback(function () use($wgMemc, $memcKey) {
             $wgMemc->delete($memcKey);
         });
     } elseif (is_array($times)) {
         # Could not acquire lock but an old cache exists, so use it
         unset($times['timestamp']);
         // hide from caller
         return $times;
     }
     $times = array();
     foreach ($serverIndexes as $i) {
         if ($i == 0) {
             # Master
             $times[$i] = 0;
         } elseif (false !== ($conn = $this->parent->getAnyOpenConnection($i))) {
             $times[$i] = $conn->getLag();
         } elseif (false !== ($conn = $this->parent->openConnection($i, $wiki))) {
             $times[$i] = $conn->getLag();
         }
     }
     # Add a timestamp key so we know when it was cached
     $times['timestamp'] = time();
     $wgMemc->set($memcKey, $times, $expiry + 10);
     unset($times['timestamp']);
     // hide from caller
     return $times;
 }
开发者ID:Tarendai,项目名称:spring-website,代码行数:59,代码来源:LoadMonitor.php

示例3: getLagTimes

 /**
  * @param $serverIndexes
  * @param $wiki
  * @return array
  */
 function getLagTimes($serverIndexes, $wiki)
 {
     if (count($serverIndexes) == 1 && reset($serverIndexes) == 0) {
         // Single server only, just return zero without caching
         return array(0 => 0);
     }
     wfProfileIn(__METHOD__);
     $expiry = 5;
     $requestRate = 10;
     global $wgMemc;
     if (empty($wgMemc)) {
         $wgMemc = wfGetMainCache();
     }
     $masterName = $this->parent->getServerName(0);
     $memcKey = wfMemcKey('lag_times', $masterName);
     $times = $wgMemc->get($memcKey);
     if ($times) {
         # Randomly recache with probability rising over $expiry
         $elapsed = time() - $times['timestamp'];
         $chance = max(0, ($expiry - $elapsed) * $requestRate);
         if (mt_rand(0, $chance) != 0) {
             unset($times['timestamp']);
             wfProfileOut(__METHOD__);
             return $times;
         }
         wfIncrStats('lag_cache_miss_expired');
     } else {
         wfIncrStats('lag_cache_miss_absent');
     }
     # Cache key missing or expired
     $times = array();
     foreach ($serverIndexes as $i) {
         if ($i == 0) {
             # Master
             $times[$i] = 0;
         } elseif (false !== ($conn = $this->parent->getAnyOpenConnection($i))) {
             $times[$i] = $conn->getLag();
         } elseif (false !== ($conn = $this->parent->openConnection($i, $wiki))) {
             $times[$i] = $conn->getLag();
         }
     }
     # Add a timestamp key so we know when it was cached
     $times['timestamp'] = time();
     $wgMemc->set($memcKey, $times, $expiry);
     # But don't give the timestamp to the caller
     unset($times['timestamp']);
     $lagTimes = $times;
     wfProfileOut(__METHOD__);
     return $lagTimes;
 }
开发者ID:eFFemeer,项目名称:seizamcore,代码行数:55,代码来源:LoadMonitor.php

示例4: getLagTimes

 public function getLagTimes($serverIndexes, $wiki)
 {
     if (count($serverIndexes) == 1 && reset($serverIndexes) == 0) {
         # Single server only, just return zero without caching
         return array(0 => 0);
     }
     $key = $this->getLagTimeCacheKey();
     # Randomize TTLs to reduce stampedes (4.0 - 5.0 sec)
     $ttl = mt_rand(4000000.0, 5000000.0) / 1000000.0;
     # Keep keys around longer as fallbacks
     $staleTTL = 60;
     # (a) Check the local APC cache
     $value = $this->srvCache->get($key);
     if ($value && $value['timestamp'] > microtime(true) - $ttl) {
         wfDebugLog('replication', __METHOD__ . ": got lag times ({$key}) from local cache");
         return $value['lagTimes'];
         // cache hit
     }
     $staleValue = $value ?: false;
     # (b) Check the shared cache and backfill APC
     $value = $this->mainCache->get($key);
     if ($value && $value['timestamp'] > microtime(true) - $ttl) {
         $this->srvCache->set($key, $value, $staleTTL);
         wfDebugLog('replication', __METHOD__ . ": got lag times ({$key}) from main cache");
         return $value['lagTimes'];
         // cache hit
     }
     $staleValue = $value ?: $staleValue;
     # (c) Cache key missing or expired; regenerate and backfill
     if ($this->mainCache->lock($key, 0, 10)) {
         # Let this process alone update the cache value
         $cache = $this->mainCache;
         /** @noinspection PhpUnusedLocalVariableInspection */
         $unlocker = new ScopedCallback(function () use($cache, $key) {
             $cache->unlock($key);
         });
     } elseif ($staleValue) {
         # Could not acquire lock but an old cache exists, so use it
         return $staleValue['lagTimes'];
     }
     $lagTimes = array();
     foreach ($serverIndexes as $i) {
         if ($i == 0) {
             # Master
             $lagTimes[$i] = 0;
         } elseif (false !== ($conn = $this->parent->getAnyOpenConnection($i))) {
             $lagTimes[$i] = $conn->getLag();
         } elseif (false !== ($conn = $this->parent->openConnection($i, $wiki))) {
             $lagTimes[$i] = $conn->getLag();
             # Close the connection to avoid sleeper connections piling up.
             # Note that the caller will pick one of these DBs and reconnect,
             # which is slightly inefficient, but this only matters for the lag
             # time cache miss cache, which is far less common that cache hits.
             $this->parent->closeConnection($conn);
         }
     }
     # Add a timestamp key so we know when it was cached
     $value = array('lagTimes' => $lagTimes, 'timestamp' => microtime(true));
     $this->mainCache->set($key, $value, $staleTTL);
     $this->srvCache->set($key, $value, $staleTTL);
     wfDebugLog('replication', __METHOD__ . ": re-calculated lag times ({$key})");
     return $value['lagTimes'];
 }
开发者ID:sftsk,项目名称:mediawiki,代码行数:63,代码来源:LoadMonitorMySQL.php


注:本文中的LoadBalancer::openConnection方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。