mirror of
https://github.com/1f349/dendrite.git
synced 2024-12-23 16:54:08 +00:00
193 lines
11 KiB
Markdown
193 lines
11 KiB
Markdown
# Wiring
|
|
|
|
The diagram is incomplete. The following things aren't shown on the diagram:
|
|
|
|
- [ ] Device Messages
|
|
- [ ] User Profiles
|
|
- [ ] Notification Counts
|
|
- [ ] Sending federation.
|
|
- [ ] Querying federation.
|
|
- [ ] Other things that aren't shown on the diagram.
|
|
|
|
Diagram:
|
|
|
|
|
|
W -> Writer
|
|
S -> Server/Store/Service/Something/Stuff
|
|
R -> Reader
|
|
|
|
+---+ +---+ +---+
|
|
+----------| W | +----------| S | +--------| R |
|
|
| +---+ | Receipts +---+ | Client +---+
|
|
| Federation |>=========================================>| Server |>=====================>| Sync |
|
|
| Receiver | | | | |
|
|
| | +---+ | | | |
|
|
| | +--------| W | | | | |
|
|
| | | Client +---+ | | | |
|
|
| | | Receipt |>=====>| | | |
|
|
| | | Updater | | | | |
|
|
| | +----------+ | | | |
|
|
| | | | | |
|
|
| | +---+ +---+ | | +---+ | |
|
|
| | +------------| W | +------| S | | | +--------| R | | |
|
|
| | | Federation +---+ | Room +---+ | | | Client +---+ | |
|
|
| | | Backfill |>=====>| Server |>=====>| |>=====>| Push | | |
|
|
| | +--------------+ | | +------------+ | | | |
|
|
| | | | | | | |
|
|
| | | |>==========================>| | | |
|
|
| | | | +----------+ | |
|
|
| | | | | |
|
|
| | | | +---+ | |
|
|
| | | | +--------| R | | |
|
|
| | | | | Client +---+ | |
|
|
| |>========================>| |>==========================>| Search | | |
|
|
| | | | | | | |
|
|
| | | | +----------+ | |
|
|
| | | | | |
|
|
| | | |>==========================================>| |
|
|
| | | | | |
|
|
| | +---+ | | +---+ | |
|
|
| | +--------| W | | | +----------| S | | |
|
|
| | | Client +---+ | | | Presence +---+ | |
|
|
| | | API |>=====>| |>=====>| Server |>=====================>| |
|
|
| | | /send | +--------+ | | | |
|
|
| | | | | | | |
|
|
| | | |>======================>| |<=====================<| |
|
|
| | +----------+ | | | |
|
|
| | | | | |
|
|
| | +---+ | | | |
|
|
| | +--------| W | | | | |
|
|
| | | Client +---+ | | | |
|
|
| | | Presence |>=====>| | | |
|
|
| | | Setter | | | | |
|
|
| | +----------+ | | | |
|
|
| | | | | |
|
|
| | | | | |
|
|
| |>=========================================>| | | |
|
|
| | +------------+ | |
|
|
| | | |
|
|
| | +---+ | |
|
|
| | +----------| S | | |
|
|
| | | Typing +---+ | |
|
|
| |>=========================================>| Server |>=====================>| |
|
|
+------------+ | | +----------+
|
|
+---+ | |
|
|
+--------| W | | |
|
|
| Client +---+ | |
|
|
| Typing |>=====>| |
|
|
| Setter | | |
|
|
+----------+ +------------+
|
|
|
|
|
|
# Component Descriptions
|
|
|
|
Many of the components are logical rather than physical. For example it is
|
|
possible that all of the client API writers will end up being glued together
|
|
and always deployed as a single unit.
|
|
|
|
Outbound federation requests will probably need to be funnelled through a
|
|
choke-point to implement ratelimiting and backoff correctly.
|
|
|
|
## Federation Send
|
|
|
|
* Handles `/federation/v1/send/` requests.
|
|
* Fetches missing ``prev_events`` from the remote server if needed.
|
|
* Fetches missing room state from the remote server if needed.
|
|
* Checks signatures on remote events, downloading keys if needed.
|
|
* Queries information needed to process events from the Room Server.
|
|
* Writes room events to logs.
|
|
* Writes presence updates to logs.
|
|
* Writes receipt updates to logs.
|
|
* Writes typing updates to logs.
|
|
* Writes other updates to logs.
|
|
|
|
## Client API /send
|
|
|
|
* Handles puts to `/client/v1/rooms/` that create room events.
|
|
* Queries information needed to process events from the Room Server.
|
|
* Talks to remote servers if needed for joins and invites.
|
|
* Writes room event pdus.
|
|
* Writes presence updates to logs.
|
|
|
|
## Client Presence Setter
|
|
|
|
* Handles puts to whatever the client API path for presence is?
|
|
* Writes presence updates to logs.
|
|
|
|
## Client Typing Setter
|
|
|
|
* Handles puts to whatever the client API path for typing is?
|
|
* Writes typing updates to logs.
|
|
|
|
## Client Receipt Updater
|
|
|
|
* Handles puts to whatever the client API path for receipts is?
|
|
* Writes typing updates to logs.
|
|
|
|
## Federation Backfill
|
|
|
|
* Backfills events from other servers
|
|
* Writes the resulting room events to logs.
|
|
* Is a different component from the room server itself cause it'll
|
|
be easier if the room server component isn't making outbound HTTP requests
|
|
to remote servers
|
|
|
|
## Room Server
|
|
|
|
* Reads new and backfilled room events from the logs written by FS, FB and CRS.
|
|
* Tracks the current state of the room and the state at each event.
|
|
* Probably does auth checks on the incoming events.
|
|
* Handles state resolution as part of working out the current state and the
|
|
* state at each event.
|
|
* Writes updates to the current state and new events to logs.
|
|
* Shards by room ID.
|
|
|
|
## Receipt Server
|
|
|
|
* Reads new updates to receipts from the logs written by the FS and CRU.
|
|
* Somehow learns enough information from the room server to workout how the
|
|
current receipt markers move with each update.
|
|
* Writes the new marker positions to logs
|
|
* Shards by room ID?
|
|
* It may be impossible to implement without folding it into the Room Server
|
|
forever coupling the components together.
|
|
|
|
## Typing Server
|
|
|
|
* Reads new updates to typing from the logs written by the FS and CTS.
|
|
* Updates the current list of people typing in a room.
|
|
* Writes the current list of people typing in a room to the logs.
|
|
* Shards by room ID?
|
|
|
|
## Presence Server
|
|
|
|
* Reads the current state of the rooms from the logs to track the intersection
|
|
of room membership between users.
|
|
* Reads updates to presence from the logs written by the FS and the CPS.
|
|
* Reads when clients sync from the logs from the Client Sync.
|
|
* Tracks any timers for users.
|
|
* Writes the changes to presence state to the logs.
|
|
* Shards by user ID somehow?
|
|
|
|
## Client Sync
|
|
|
|
* Handle /client/v2/sync requests.
|
|
* Reads new events and the current state of the rooms from logs written by the Room Server.
|
|
* Reads new receipts positions from the logs written by the Receipts Server.
|
|
* Reads changes to presence from the logs written by the Presence Server.
|
|
* Reads changes to typing from the logs written by the Typing Server.
|
|
* Writes when a client starts and stops syncing to the logs.
|
|
|
|
## Client Search
|
|
|
|
* Handle whatever the client API path for event search is?
|
|
* Reads new events and the current state of the rooms from logs writeen by the Room Server.
|
|
* Maintains a full text search index of somekind.
|
|
|
|
## Client Push
|
|
|
|
* Pushes unread messages to remote push servers.
|
|
* Reads new events and the current state of the rooms from logs writeen by the Room Server.
|
|
* Reads the position of the read marker from the Receipts Server.
|
|
* Makes outbound HTTP hits to the push server for the client device.
|