Replace guava caches with caffeine

Replacing Guava caches with Caffeine reduces the chances of having the
deadlocks and improves the cache performance.

This was already attempted in: I8d2b17a94d0, but got reverted in:
If65560b4a9b due to recursion in PatchListLoader. This recursion issue
is present on current master. While this change replaces all caches
with Caffeine backend, the follow-up change in this series will switch
back to using Guava backend for PatchListCache implementation.

For seamless integration, the caffeine-guava adapter library is used.
Given that the final artifact for the adapter is also called guava,
there is only the version number that differentiates that artifact from
the guava library itself so that we have a danger for naming collision.
To avoid potential naming collision risk, rename the library name to
caffeine-guava.jar during the fetch from Maven Central.

Alternatives considered is not to use the caffeine-guava adapter
library. But then the Cache and LoadingCache classes and friends would
change the package name from com.google.common.cache package to
com.github.benmanes.caffeine.cache package and this change would also
affect some gerrit plugins and thus considered to be a quite intrusive
change.  Still we can consider to do this change in one of the future
gerrit releases.

Bug: Issue 7645
Bug: Issue 11484
Change-Id: I6af4c15d6c15f438becd62409b7d233c309be8de
5 files changed
tree: f6a1edf95d2d279a0cdf00b76acb8202e09c8c17
  1. .settings/
  2. antlr3/
  3. contrib/
  4. Documentation/
  5. e2e-tests/
  6. java/
  7. javatests/
  8. lib/
  9. modules/
  10. plugins/
  11. polygerrit-ui/
  12. prolog/
  13. prologtests/
  14. proto/
  15. resources/
  16. tools/
  17. webapp/
  18. .bazelignore
  19. .bazelproject
  20. .bazelrc
  21. .bazelversion
  22. .editorconfig
  23. .git-blame-ignore-revs
  24. .gitignore
  25. .gitmodules
  26. .gitreview
  27. .mailmap
  28. .pydevproject
  29. BUILD
  30. COPYING
  31. INSTALL
  32. Jenkinsfile
  33. package.json
  34. README.md
  35. SUBMITTING_PATCHES
  36. version.bzl
  37. WORKSPACE
README.md

Gerrit Code Review

Gerrit is a code review and project management tool for Git based projects.

Build Status

Objective

Gerrit makes reviews easier by showing changes in a side-by-side display, and allowing inline comments to be added by any reviewer.

Gerrit simplifies Git based project maintainership by permitting any authorized user to submit changes to the master Git repository, rather than requiring all approved changes to be merged in by hand by the project maintainer.

Documentation

For information about how to install and use Gerrit, refer to the documentation.

Source

Our canonical Git repository is located on googlesource.com. There is a mirror of the repository on Github.

Reporting bugs

Please report bugs on the issue tracker.

Contribute

Gerrit is the work of hundreds of contributors. We appreciate your help!

Please read the contribution guidelines.

Note that we do not accept Pull Requests via the Github mirror.

Getting in contact

The Developer Mailing list is repo-discuss on Google Groups.

License

Gerrit is provided under the Apache License 2.0.

Build

Install Bazel and run the following:

    git clone --recurse-submodules https://gerrit.googlesource.com/gerrit
    cd gerrit && bazel build release

Install binary packages (Deb/Rpm)

The instruction how to configure GerritForge/BinTray repositories is here

On Debian/Ubuntu run:

    apt-get update & apt-get install gerrit=<version>-<release>

NOTE: release is a counter that starts with 1 and indicates the number of packages that have been released with the same version of the software.

On CentOS/RedHat run:

    yum clean all && yum install gerrit-<version>[-<release>]

On Fedora run:

    dnf clean all && dnf install gerrit-<version>[-<release>]

Use pre-built Gerrit images on Docker

Docker images of Gerrit are available on DockerHub

To run a CentOS 7 based Gerrit image:

    docker run -p 8080:8080 gerritforge/gerrit-centos7[:version]

To run a Ubuntu 15.04 based Gerrit image:

    docker run -p 8080:8080 gerritforge/gerrit-ubuntu15.04[:version]

NOTE: release is optional. Last released package of the version is installed if the release number is omitted.