{"action":"created","comment":{"url":"https://api.github.com/repos/cockroachdb/cockroach/pulls/comments/45548942","id":45548942,"diff_hunk":"@@ -39,33 +39,84 @@\n extern \"C\" {\n #include \"_cgo_export.h\"\n \n-struct DBBatch {\n+struct DBEngine {\n+  rocksdb::DB* const rep;\n+\n+  DBEngine(rocksdb::DB* r)\n+      : rep(r) {\n+  }\n+  virtual ~DBEngine() { }\n+\n+  virtual DBStatus Put(DBSlice key, DBSlice value);","path":"storage/engine/rocksdb/db.cc","position":13,"original_position":13,"commit_id":"5bb35a522dd875045f24ad2310e8d9942e86f7ca","original_commit_id":"5bb35a522dd875045f24ad2310e8d9942e86f7ca","user":{"login":"bdarnell","id":160562,"avatar_url":"https://avatars.githubusercontent.com/u/160562?v=3","gravatar_id":"","url":"https://api.github.com/users/bdarnell","html_url":"https://github.com/bdarnell","followers_url":"https://api.github.com/users/bdarnell/followers","following_url":"https://api.github.com/users/bdarnell/following{/other_user}","gists_url":"https://api.github.com/users/bdarnell/gists{/gist_id}","starred_url":"https://api.github.com/users/bdarnell/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/bdarnell/subscriptions","organizations_url":"https://api.github.com/users/bdarnell/orgs","repos_url":"https://api.github.com/users/bdarnell/repos","events_url":"https://api.github.com/users/bdarnell/events{/privacy}","received_events_url":"https://api.github.com/users/bdarnell/received_events","type":"User","site_admin":false},"body":"It looks like these methods can be pure in the base class and the implementations moved to `DBImpl` (in which case disregard my other comment about the name of `DBImpl`)","created_at":"2015-11-21T18:17:19Z","updated_at":"2015-11-21T18:17:19Z","html_url":"https://github.com/cockroachdb/cockroach/pull/3180#discussion_r45548942","pull_request_url":"https://api.github.com/repos/cockroachdb/cockroach/pulls/3180","_links":{"self":{"href":"https://api.github.com/repos/cockroachdb/cockroach/pulls/comments/45548942"},"html":{"href":"https://github.com/cockroachdb/cockroach/pull/3180#discussion_r45548942"},"pull_request":{"href":"https://api.github.com/repos/cockroachdb/cockroach/pulls/3180"}}},"pull_request":{"url":"https://api.github.com/repos/cockroachdb/cockroach/pulls/3180","id":51357390,"html_url":"https://github.com/cockroachdb/cockroach/pull/3180","diff_url":"https://github.com/cockroachdb/cockroach/pull/3180.diff","patch_url":"https://github.com/cockroachdb/cockroach/pull/3180.patch","issue_url":"https://api.github.com/repos/cockroachdb/cockroach/issues/3180","number":3180,"state":"open","locked":false,"title":"Cleanup of the C++ DB* implementation and interface.","user":{"login":"petermattis","id":6201335,"avatar_url":"https://avatars.githubusercontent.com/u/6201335?v=3","gravatar_id":"","url":"https://api.github.com/users/petermattis","html_url":"https://github.com/petermattis","followers_url":"https://api.github.com/users/petermattis/followers","following_url":"https://api.github.com/users/petermattis/following{/other_user}","gists_url":"https://api.github.com/users/petermattis/gists{/gist_id}","starred_url":"https://api.github.com/users/petermattis/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/petermattis/subscriptions","organizations_url":"https://api.github.com/users/petermattis/orgs","repos_url":"https://api.github.com/users/petermattis/repos","events_url":"https://api.github.com/users/petermattis/events{/privacy}","received_events_url":"https://api.github.com/users/petermattis/received_events","type":"User","site_admin":false},"body":"Merged the DBBatch* functions into the DB* equivalents. Remove the\nDBSnapshot argument to DBGet() and DBNewIter(). DBNew{Batch,Snapshot}()\nnow returns a DBEngine. Internally, DBEngine has methods implementing\nGet, Put, etc. and DB{Batch,Snapshot} override the base implementations.\n\nThis work does not change any functionality, but will make it easier to\nuse DBEngine, DBBatch and DBSnapshot interchangeably with the C++\ncode. 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