* Created message export scheduled task
* Added CLI command to immediately kick off an export job
* Added email addresses for users joining and leaving the channel to the export
* Added support for both MySQL and PostgreSQL
* Fixing gofmt error
* Added a new ChannelMemberHistory store and associated tests
* Updating the ChannelMemberHistory channel as users create/join/leave channels
* Added user email to the message export object so it can be included in the actiance export xml
* Don't fail to log a leave event if a corresponding join event wasn't logged
* Adding copyright notices
* Adding message export settings to daily diagnostics report
* Added System Console integration for message export
* Cleaned up TODOs
* Made batch size configurable
* Added export from timestamp to CLI command
* Made ChannelMemberHistory table updates best effort
* Added a context-based timeout option to the message export CLI
* Minor PR updates/improvements
* Removed unnecessary fields from MessageExport object to reduce query overhead
* Removed JSON functions from the message export query in an effort to optimize performance
* Changed the way that channel member history queries and purges work to better account for edge cases
* Fixing a test I missed with the last refactor
* Added file copy functionality to file backend, improved config validation, added default config values
* Fixed file copy tests
* More concise use of the testing libraries
* Fixed context leak error
* Changed default export path to correctly place an 'export' directory under the 'data' directory
* Can't delete records from a read replica
* Fixed copy file tests
* Start job workers when license is applied, if configured to do so
* Suggestions from the PR
* Moar unit tests
* Fixed test imports
* Implement user access tokens and new roles
* Update config.json
* Add public post permission to apiv3
* Remove old comment
* Fix model unit test
* Updates to store per feedback
* Updates per feedback from CS
* Adding Reaction store cache layer example
* Implementing reaction store in new caching system.
* Redis for reaction store
* Adding redis library
* Adding invalidation for DeleteAllWithEmojiName and other minor enhancements
This commit redesigns the jobserver to be based around an architecture
of "workers", which carry out jobs of a particular type, and "jobs"
which are a unit of work carried by a particular worker. It also
introduces "schedulers" which are responsible for scheduling jobs of a
particular type automatically (jobs can also be scheduled manually when
apropriate).
Workers may be run many times, either in instances of the platform
binary, or the standalone jobserver binary. In any mattermost cluster,
only one instance of platform OR jobserver must run the schedulers. At
the moment this is controlled by a config variable, but in future will
be controlled through the cluster leader election process.
