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PHP Cross Reference of Moodle 1.9.3 [Build 15-Oct-2008] |
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| File Size: | 132 lines (4 kb) |
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eaccelerator:: (7 methods):
eaccelerator()
status()
set()
get()
delete()
getforfill()
releaseforfill()
Class: eaccelerator - X-Ref
This class abstracts eaccelerator/turckmmcache| eaccelerator() X-Ref |
| No description |
| status() X-Ref |
| No description |
| set($key, $value, $ttl=0) X-Ref |
| No description |
| get($key) X-Ref |
| No description |
| delete($key) X-Ref |
| No description |
| getforfill($key) X-Ref |
| In the simple case, this function will get the cached value if available. If the entry is not cached, it will try to get an exclusive lock that announces that this process will populate the cache. If we fail to get the lock -- this means another process is doing it. so we wait (block) for a few microseconds while we wait for the cache to be filled or the lock to timeout. If you get a false from this call, you _must_ populate the cache ASAP or indicate that you won't by calling releaseforfill(). This technique forces serialisation and so helps deal with thundering herd scenarios where a lot of clients ask the for the same idempotent (and costly) operation. The implementation is based on suggestions in this message http://marc.theaimsgroup.com/?l=git&m=116562052506776&w=2 param: $key string return: mixed on cache hit, false otherwise |
| releaseforfill($key) X-Ref |
| Release the exclusive lock obtained by getforfill(). See getforfill() for more details. param: $key string return: bool |
| Generated: Wed Jan 14 11:33:29 2009 | Cross-referenced by PHPXref 0.7 |