Apply modules overrides by libModule for batch program reindex

Gerrit ignores libModule overrides when running its batch programs.
As a consequence, it would not allow to replace default implementation
with ad-hoc modules (e.g. use a persistent cache different than H2).

From Change-Id: I9be5a2ea0f Gerrit supports plugins that can provide
extra BatchModules to be used by the Gerrit site programs like
the reindex and during the init phase.
Improve the BatchModule by enabling also the replacement of Gerrit's
introducing a new LibModuleType.SYS_BATCH_MODULE called BatchModule.

Allow to specify a set of alternative implementations during
the Gerrit programs execution by introducing a new libBatchModule.
LibModules can override any of the Gerrit tagged modules loaded
by default by the BatchProgramModule.

Modules can potentially provide also a different set of bindings
for the daemon execution (libModule configuration) and the site program
(libBatchModule configuration), so to adapt to the availability
of different injected classes in the two contexts.

Before this change, plugins could already expose BatchModule to be
loaded in Gerrit's site programs like the reindex.
This change allows Gerrit to have in addition the ability to override
the tagged Modules in core with alternative implementations provided
by the library.

One use case is the persistent cache backend, alternative to the default
H2 backend, which during reindex needs to populates the diff caches.

Bug: Issue 14004
Change-Id: Ifab60ae3252d50066eb04cb02369b0ce987ee835
4 files changed
tree: 10ff16473b1482fa09f5eac1f99cdc90094edd86
  1. .settings/
  2. .ts-out/
  3. antlr3/
  4. contrib/
  5. Documentation/
  6. e2e-tests/
  7. java/
  8. javatests/
  9. lib/
  10. modules/
  11. plugins/
  12. polygerrit-ui/
  13. prolog/
  14. prologtests/
  15. proto/
  16. resources/
  17. tools/
  18. webapp/
  19. .bazelignore
  20. .bazelproject
  21. .bazelrc
  22. .bazelversion
  23. .editorconfig
  24. .git-blame-ignore-revs
  25. .gitignore
  26. .gitmodules
  27. .gitreview
  28. .mailmap
  29. .pydevproject
  30. .zuul.yaml
  31. BUILD
  32. COPYING
  33. INSTALL
  34. Jenkinsfile
  35. package.json
  36. README.md
  37. SUBMITTING_PATCHES
  38. version.bzl
  39. WORKSPACE
  40. yarn.lock
README.md

Gerrit Code Review

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

Build Status Maven Central

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 8 based Gerrit image:

    docker run -p 8080:8080 gerritcodereview/gerrit[:version]-centos8

To run a Ubuntu 20.04 based Gerrit image:

    docker run -p 8080:8080 gerritcodereview/gerrit[:version]-ubuntu20

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