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fix(multiplayer): recover recorded allocations

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Josh Creek
2026-09-01 10:40:10 +01:00
parent 55c46f56ec
commit 25fdc2c2c8
6 changed files with 68 additions and 12 deletions
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server/store/allocation_match_sql.go
+25
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@@ -1,6 +1,7 @@
package store
import (
"bytes"
"context"
"database/sql"
"fmt"
@@ -47,6 +48,30 @@ const ReleaseAllocatedMatchClaimSQL = `UPDATE matches
SET allocation_id = NULL, allocation_claimed_at = NULL
WHERE match_id = $1 AND state = 'ALLOCATING' AND allocation_id = $2 AND server_id IS NULL`
// FindProviderAllocation verifies whether a recovered lease has already
// crossed the durable provider boundary. A worker can then bind it without
// issuing a second external allocation request after a crash.
func FindProviderAllocation(ctx context.Context, db *sql.DB, request domain.AllocationRequest) (domain.Allocation, bool, error) {
if db == nil || request.AllocationID == "" || request.MatchID == "" || request.Region == "" || request.Build == "" || request.Protocol <= 0 || (request.Transport != "enet" && request.Transport != "steam_sdr") {
return domain.Allocation{}, false, fmt.Errorf("invalid provider allocation lookup")
}
var allocation domain.Allocation
var digest []byte
err := db.QueryRowContext(ctx, SelectAllocationSQL, request.AllocationID).Scan(&allocation.AllocationID, &allocation.MatchID, &allocation.ServerID, &allocation.Region, &allocation.Build, &allocation.Protocol, &allocation.Transport, &allocation.AllocatedAt, &digest)
if err == sql.ErrNoRows {
return domain.Allocation{}, false, nil
}
if err != nil {
return domain.Allocation{}, false, err
}
want := allocationRequestDigest(request)
if !bytes.Equal(digest, want[:]) || allocation.MatchID != request.MatchID || allocation.Region != request.Region || allocation.Build != request.Build || allocation.Protocol != request.Protocol || allocation.Transport != request.Transport {
return domain.Allocation{}, false, domain.ErrConflict
}
allocation.State = domain.ServerAllocated
return allocation, true, nil
}
// ClaimAllocatingMatch returns one durable provider work item. The fixed
// allocation ID is retained across a lease recovery, allowing every later
// reconciliation step to reject a different server for the same match.