This PR builds up on the pass-through DB driver to a fully functioning DB driver implementation via our RPC layer.
To keep things separate from the plugin RPC API, and have the ability to move fast with changes, a separate field Driver is added to MattermostPlugin. Typically the field which is required to be compatible are the API and Helpers. It would be well-documented that Driver is purely for internal use by Mattermost plugins.
A new Driver interface was created which would have a client and server implementation. Every object (connection, statement, etc.) is created and added to a map on the server side. On the client side, the wrapper structs hold the object id, and communicate via the RPC API using this id.
When the server gets the object id, it picks up the appropriate object from its map and performs the operation, and sends back the data.
Some things that need to be handled are errors. Typical error types like pq.Error and mysql.MySQLError are registered with encoding/gob. But for error variables like sql.ErrNoRows, a special integer is encoded with the ErrorString struct. And on the cilent side, the integer is checked, and the appropriate error variable is returned.
Some pending things:
- Context support. This is tricky. Since context.Context is an interface, it's not possible to marshal it. We have to find a way to get the timeout value from the context and pass it.
- RowsColumnScanType(rowsID string, index int) reflect.Type API. Again, reflect.Type is an interface.
- Master/Replica API support.
* MM-31063: Change constants to use CamelCase
* store package
* change allcaps to camel case (#16615)
* New tools.mod
Co-authored-by: Ibrahim Serdar Acikgoz <serdaracikgoz86@gmail.com>
This PR adds EnsureChannel helper analogous to EnsureBot helper which creates a new channel if not exists and update the meta data of the channel if exists. Also, it will throw error
if the type of existing channel do not match the type of new channel.
* Adding EnsureBot plugin helper.
* Removing unessisary GetBot call.
* Moving to own file and error handling cleanup.
* Removing patch functionaliy. Plugins should manage their own bot account updates for now.
* Adding tests and cleaning up errors.
* Modify to not shadow err.
* Moving helpers to seperate interface.
* Feedback fixes
* MM-12193: remove auto configuration unmarshalling
Since plugin hook events are called concurrently, there's no way for the plugin framework to coordinate safe access to the automatically unmarshalled configuration fields. Remove this functionality, and update documentation to illustrate a safe way to do this.
* better Fprint example
* fix unit tests
* log when OnConfigurationChange fails through OnActivate
* clarify lifecycle when OnConfigurationChange returns an error
* call SetAPI even if OnConfigurationChange not implemented
* clean up plugins GoDoc:
- eliminate plugin.NewBlankContext() as unnecessary
- export ValidIdRegex as a string vs. the less readable var
- add/update various documentation strings
- hide everything by default, except where used by client plugins or the mattermost-server. The exception to this rule are the `*(Args|Returns)` structs which must be public for go-plugin, but are now prefixed with `Z_` with a warning not to use.
- include a top-level example to get plugin authors started
This is not a breaking change for existing plugins compiled against
plugins-v2.
* remove commented out ServeHTTPResponseWriter
* update examples to match developer docs
* add missing plugin/doc.go license header
