mesh-catalog/modules/mesh-healers

mesh-healers

Holds the seat mesh-healers (novox/hq ADR 0564 §7, §8): the mesh's healers, moved out of the controller. Go, one binary (cmd/mesh-healers), served by a runtime of its own on its own bus account (runs-as).

What it does

It hears the condition keeper's condition-raised and condition-changed (seat mesh-conditions) on a durable consumer. A condition whose kind a healer answers is acted on within the healer's budget, its settle and the mesh-wide brake (twelve acts an hour). A repair is a call of the seat or tool that owns the act: H3 asks the grants part's grants_assert for the module whose consumer is gone. H4 (the controller's own consumer) and H5 (the provider's own repair) are registered and run elsewhere.

Each act is begun by a create of its key in attempts before it is made and finished after, so a holder that dies mid-act has spent it and a second instance cannot begin it again. The condition keeper writes the condition's tried, resolver and escalation from attempts; a healer writes no condition.

Only once the controller's lease names no controller. Until the write that hands the lease away, each act it would take is written to would, never to attempts: it counts for no budget, settle or brake and reaches no condition.

Both buckets age as a whole, each key a week after its last write: the runtime gives a bundle no time to live per key, so the bucket's age is the deleter for this release. The end of a settle and the end of S15's fortnight wake the healers through an in-process timer, armed by the act; at start, once the lease is first read, every settle still running is re-armed from attempts and one that ended while they were down is judged at once, and the hand-act log's watch hands over every entry again, which re-arms S15. So a restart loses no wake.

S15: it watches the controller's hand-act log and writes healer-wanted for a cause repaired by hand twice within a fortnight; a drill and a person's decision by design never count.

What it keeps

• mesh-healers_attempts: every act and escalation, kept a week (the bucket's age).
• mesh-healers_would: the newest act it would take per healer and condition while the controller holds the lease, kept a week (the bucket's age); nothing else deletes it, and nothing is written there once the lease is handed away.
• mesh-healers_findings: the brake, its own blindness, and S15.

Its verbs and tools

• mesh-healers.healers: the registry, the acts of the last days, the would-acts, the brake, whether it acts and why; recount=true counts the hand-act log again.
• mesh-healers.heal: one act now on an open condition, by key and why.
• mesh-healers.drill: refused until the hand-act log's home is delivered (issue 1953), naming mesh-controller.drill.
• healers_findings, healers_would: the reads of its buckets.