| # SWO Group | |
| The `swogrp` package handles orchestrating the state and transitions of the SWO process. The state of the cluster can be determined by following the sequence in the message log, which is the source of truth. | |
| ## Cluster State | |
| ```mermaid | |
| sequenceDiagram | |
| actor admin as Admin | |
| participant api as API Node | |
| participant log as Message Log | |
| participant engine as Engine Node | |
| note over admin,engine: Cluster State: **Unknown** | |
| admin ->> api : Click(Reset) | |
| activate api | |
| api ->> log : "cancel" | |
| api ->> api : DisableTriggers() | |
| api ->> log : "reset" | |
| api -->> admin: OK | |
| deactivate api | |
| note over admin,engine: Cluster State: **Resetting** | |
| engine ->> log: "hello" | |
| activate engine | |
| note over engine: Becomes Leader | |
| api ->> log: "hello" | |
| engine ->> engine: Wait 3s for "hello" messages | |
| engine ->> log: "reset-end" | |
| deactivate engine | |
| note over admin,engine: Cluster State: **Idle** | |
| admin ->> api: Click(Execute) | |
| activate api | |
| api ->> log: "execute" | |
| api -->> admin: OK | |
| deactivate api | |
| note over admin,engine: Cluster State: **Syncing** | |
| log -->> engine: "execute" | |
| activate engine | |
| engine ->> engine: EnableTriggers() | |
| engine ->> engine: InitialSync() | |
| engine ->> engine: LogicalSync() x10 | |
| engine ->> log: "pause" | |
| deactivate engine | |
| note over admin,engine: Cluster State: **Pausing** | |
| engine ->> engine: Pause() | |
| engine ->> log: "paused" | |
| api ->> api: Pause() | |
| api ->> log: "paused" | |
| note over admin,engine: Cluster State: **Executing** | |
| log -->> engine: 2/2 "paused" | |
| activate engine | |
| engine ->> engine: LogicalSync() x10 | |
| engine ->> engine: FinalSync() | |
| engine ->> log: "done" | |
| deactivate engine | |
| note over admin,engine: Cluster State: **Done** | |
| ``` | |