public $stream = null;
public $cachekey = null;
+ public $useLast = true;
- function __construct($stream, $cachekey)
+ function __construct($stream, $cachekey, $useLast = true)
{
$this->stream = $stream;
$this->cachekey = $cachekey;
+ $this->useLast = $useLast;
}
function getNoticeIds($offset, $limit, $sinceId, $maxId)
return $ids;
}
- // Check the cache to see if we have a "last-known-good" version.
- // The actual cache gets blown away when new notices are added, but
- // the "last" value holds a lot of info. We might need to only generate
- // a few at the "tip", which can bound our queries and save lots
- // of time.
+ if ($this->useLast) {
+ // Check the cache to see if we have a "last-known-good" version.
+ // The actual cache gets blown away when new notices are added, but
+ // the "last" value holds a lot of info. We might need to only generate
+ // a few at the "tip", which can bound our queries and save lots
+ // of time.
- $laststr = $cache->get($idkey.';last');
+ $laststr = $cache->get($idkey.';last');
- if ($laststr !== false) {
- $window = explode(',', $laststr);
- $last_id = $window[0];
- $new_ids = $this->stream->getNoticeIds(0, self::CACHE_WINDOW, $last_id, 0);
+ if ($laststr !== false) {
+ $window = explode(',', $laststr);
+ $last_id = $window[0];
+ $new_ids = $this->stream->getNoticeIds(0, self::CACHE_WINDOW, $last_id, 0);
- $new_window = array_merge($new_ids, $window);
+ $new_window = array_merge($new_ids, $window);
- $new_windowstr = implode(',', $new_window);
+ $new_windowstr = implode(',', $new_window);
- $result = $cache->set($idkey, $new_windowstr);
- $result = $cache->set($idkey . ';last', $new_windowstr);
+ $result = $cache->set($idkey, $new_windowstr);
+ $result = $cache->set($idkey . ';last', $new_windowstr);
- $ids = array_slice($new_window, $offset, $limit);
+ $ids = array_slice($new_window, $offset, $limit);
- return $ids;
+ return $ids;
+ }
}
// No cache hits :( Generate directly and stick the results
$windowstr = implode(',', $window);
$result = $cache->set($idkey, $windowstr);
- $result = $cache->set($idkey . ';last', $windowstr);
+
+ if ($this->useLast) {
+ $result = $cache->set($idkey . ';last', $windowstr);
+ }
// Return just the slice that was requested