[JGIT PATCH 00/11] Repository instance caching

From: Shawn O. Pearce <spearce@spearce.org>
Date: Jul 11, 2009, 20:19 UTC
Message-ID: <1247343566-19025-1-git-send-email-spearce@spearce.org>

This series lays the groundwork for caching Repository instances within the JRE, such as a server daemon might want when it is accessing multiple repositories, like a git:// daemon needs to do.

We also modify the way alternates are handled, checking to see if an alternate is actually an objects directory for a Repository, and if so, using the Repository instance from the cache in the alternate chain. This permits better reuse of pack files windows when repositories are using alternates. Based on this support we can also now implement the ".have" logic in the ReceivePack server code.

I plan to follow onto this series with work to support submodules in a server setting, e.g. processing the .gitmodules directly from the object database and being able to examine the submodule Repository.

Shawn O. Pearce (11):
  Change Daemon to use concurrent collections for exported repositories
  Make Daemon's exportAll check not require synchronization
  Don't retry ".git" suffix in daemon if already tried
  Refactor ref advertisement code from server implementations
  Don't advertise HEAD from ReceivePack
  Add a use reference counter to Repository
  Introduce RepositoryCache to cache handles of Repository objects
  Change Daemon to use RepositoryCache
  Expose the Repository's ObjectDatabase object
  Use cached Repository instances when resolving alternates
  Send .have lines in ReceivePack for alternate repositories

 .../org/spearce/jgit/lib/RepositoryCacheTest.java  |  126 +++++++
 .../org/spearce/jgit/lib/RepositoryTestCase.java   |   16 +-
 .../jgit/errors/RepositoryNotFoundException.java   |   65 ++++
 .../jgit/lib/AlternateRepositoryDatabase.java      |  127 +++++++
 .../src/org/spearce/jgit/lib/ObjectDatabase.java   |   16 +-
 .../src/org/spearce/jgit/lib/ObjectDirectory.java  |   18 +-
 .../src/org/spearce/jgit/lib/Repository.java       |   18 +-
 .../src/org/spearce/jgit/lib/RepositoryCache.java  |  386 ++++++++++++++++++++
 .../src/org/spearce/jgit/transport/Daemon.java     |   76 ++---
 .../org/spearce/jgit/transport/DaemonService.java  |   14 +-
 .../org/spearce/jgit/transport/ReceivePack.java    |   67 +---
 .../org/spearce/jgit/transport/RefAdvertiser.java  |  189 ++++++++++
 .../src/org/spearce/jgit/transport/UploadPack.java |   93 +-----
 13 files changed, 1019 insertions(+), 192 deletions(-)
 create mode 100644 org.spearce.jgit.test/tst/org/spearce/jgit/lib/RepositoryCacheTest.java
 create mode 100644 org.spearce.jgit/src/org/spearce/jgit/errors/RepositoryNotFoundException.java
 create mode 100644 org.spearce.jgit/src/org/spearce/jgit/lib/AlternateRepositoryDatabase.java
 create mode 100644 org.spearce.jgit/src/org/spearce/jgit/lib/RepositoryCache.java
 create mode 100644 org.spearce.jgit/src/org/spearce/jgit/transport/RefAdvertiser.java