tree d640a0657224b40980877ff43f69dab3a0cd9e8e
parent e39b40a265946f2cf9cbb2f81a446005fba38217
author Shawn Pearce <sop@google.com> 1372263702 -0600
committer Shawn Pearce <sop@google.com> 1372266462 -0600

Replace SearcherManager with NRTManager

The NRTManager allows Gerrit to wait for a specific document mutation
to be visible to searchers before trying to run a new search.  The
NRTManager comes with its own background thread to manage reopens,
replacing the thread that reopened the index every 100 ms.

The change index API now returns a ListenableFuture the caller can
wait on to learn when new queries will return the updates.

Change-Id: I1b3c5ba036241ffd54c88a16ee8b2ffb3d3bf5f2