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Improved CompactionFilter api: pass in a opaque argument to CompactionFilter invocation.

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Summary:
There are applications that operate on multiple leveldb instances.
These applications will like to pass in an opaque type for each
leveldb instance and this type should be passed back to the application
with every invocation of the CompactionFilter api.

Test Plan: Enehanced unit test for opaque parameter to CompactionFilter.

Reviewers: heyongqiang

Reviewed By: heyongqiang

CC: MarkCallaghan, sheki, emayanke

Differential Revision: https://reviews.facebook.net/D6711
This commit is contained in:
Dhruba Borthakur
2012-11-13 15:48:00 -08:00
parent a785e029f7
commit 5d16e503a6
4 changed files with 17 additions and 5 deletions
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3
db/db_impl.cc
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@@ -1164,7 +1164,8 @@ Status DBImpl::DoCompactionWork(CompactionState* compact) {
// it. If this key is not visible via any snapshot and the
// return value of the compaction filter is true and then
// drop this key from the output.
drop = options_.CompactionFilter(compact->compaction->level(),
drop = options_.CompactionFilter(options_.compaction_filter_args,
compact->compaction->level(),
ikey.user_key, value, &compaction_filter_value);
if (drop) {