2 commits

Author	SHA1	Message	Date
Yi Wu	aaf42fe775	Move blob_db/ttl_extractor.h into blob_db/blob_db.h ... Summary: Move blob_db/ttl_extractor.h into blob_db/blob_db.h Also exclude TTLExtractor from LITE build. Closes https://github.com/facebook/rocksdb/pull/2665 Differential Revision: D5520009 Pulled By: yiwu-arbug fbshipit-source-id: 4813dcc272c7cc4bf2cdac285256d9a17d78c7b7	2017-07-28 14:28:21 -07:00
Yi Wu	6083bc79f8	Blob DB TTL extractor ... Summary: Introducing blob_db::TTLExtractor to replace extract_ttl_fn. The TTL extractor can be use to extract TTL from keys insert with Put or WriteBatch. Change over existing extract_ttl_fn are: * If value is changed, it will be return via std::string* (rather than Slice*). With Slice* the new value has to be part of the existing value. With std::string* the limitation is removed. * It can optionally return TTL or expiration. Other changes in this PR: * replace `std::chrono::system_clock` with `Env::NowMicros` so that I can mock time in tests. * add several TTL tests. * other minor naming change. Closes https://github.com/facebook/rocksdb/pull/2659 Differential Revision: D5512627 Pulled By: yiwu-arbug fbshipit-source-id: 0dfcb00d74d060b8534c6130c808e4d5d0a54440	2017-07-27 23:26:04 -07:00