Lucee Memcached Extension

Issues: https://luceeserver.atlassian.net/issues/?jql=labels%20%3D%20memcached

Docs: https://docs.lucee.org/categories/cache.html

Limitations

Memcached's protocol doesn't expose key enumeration, so any CFML cache feature that needs to list or count keys is constrained:

• cacheCount(cacheName) returns -1 — the documented "count not available" sentinel from the Cache interface. Use if ( cacheCount(cn) GTE 0 ) before relying on the value. (LDEV-6324)
• cacheGetAllIds(filter, cacheName) returns an empty array.
• cacheGetAll(filter, cacheName) is currently broken against memcached and throws — see LDEV-2275.
• cacheClear(filter, cacheName) returns -1; the filter is ignored because keys can't be enumerated. cacheClear() without a filter performs a cache-wide flush and works.
• The Lucee Admin cache edit page shows Clear cache (count unsupported) for memcached connections instead of an item count.

Single-key operations work normally: cachePut, cacheGet, cacheGetMetadata, cacheKeyExists, cacheRemove.