RetryHelper: Allow arbitrary string as action type

The action type is used for 2 purposes:

1. to determine the default timeout for executing the action
2. as bucket for all retry metrics

By making action type a String (instead of limiting it to the values of
the ActionType enum) we allow plugins and organisation-specific
integrations (e.g. at Google) to define additional action types. This is
useful if there are action kinds that should use a different default
timeout or a different metric bucket. At Google, besides the REST API we
have another internal API that is mainly used by bots and we want
retries that are triggered through this API to be distinguishable in the
metrics. Hence for retries that are done through this API we want to set
another/custom action type.

For the default action types (those defined by the ActionType enum) we
read the default timeouts from gerrit.config once when RetryHelper is
initialized. For other action types we read the default timeout when it
is needed for the first time. Then the value is cached so that also
these default timeouts are read only once too. The reading of these
additional default timeouts must be thread-safe so that the map that
caches the default timeouts is updated only by one thread.

Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: Icbb395d7921864f0f2717d50a816d6a37e9ac863
2 files changed
tree: 77aa0c682b0368ef545ed41a254f4f5efb9dafe2
  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

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