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Replace StartWork and StopWork with an ActiveLeavesUpdate signal (#1431)

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Robert Habermeier
2020-07-22 12:12:49 -04:00
committed by GitHub
parent 42ddcada02
commit 5be366d6dc
10 changed files with 55 additions and 31 deletions
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polkadot/roadmap/implementers-guide/src/node/backing/candidate-backing.md
+4 -2
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@@ -31,8 +31,10 @@ The subsystem should maintain a set of handles to Candidate Backing Jobs that ar
### On Overseer Signal
* If the signal is an [`OverseerSignal`][OverseerSignal]`::StartWork(relay_parent)`, spawn a Candidate Backing Job with the given relay parent, storing a bidirectional channel with the Candidate Backing Job in the set of handles.
* If the signal is an [`OverseerSignal`][OverseerSignal]`::StopWork(relay_parent)`, cease the Candidate Backing Job under that relay parent, if any.
* If the signal is an [`OverseerSignal`][OverseerSignal]`::ActiveLeavesUpdate`:
* spawn a Candidate Backing Job for each `activated` head, storing a bidirectional channel with the Candidate Backing Job in the set of handles.
* cease the Candidate Backing Job for each `deactivated` head, if any.
* If the signal is an [`OverseerSignal`][OverseerSignal]`::Conclude`: Forward conclude messages to all jobs, wait a small amount of time for them to join, and then exit.
### On Receiving `CandidateBackingMessage`