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2026-07-13 13:32:57 +08:00

27 lines
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TypeScript

// Pure run-ops split READ gate. The LEGACY handle is intentionally the control-plane client,
// so only the NEW client's distinctness gates (see runOpsSplitReadGate.test.ts).
export function computeRunOpsSplitReadEnabled(args: {
newReplica: unknown;
controlPlaneWriter: unknown;
controlPlaneReplica: unknown;
hasNewUrl: boolean;
hasLegacyUrl: boolean;
logger?: { warn: (msg: string, meta?: Record<string, unknown>) => void };
}): boolean {
const newIsDistinctDedicatedClient =
args.newReplica !== args.controlPlaneWriter && args.newReplica !== args.controlPlaneReplica;
const enabled = newIsDistinctDedicatedClient && args.hasNewUrl && args.hasLegacyUrl;
// Configured for split but the identity check failed: fan-out is being silently disabled.
if (!newIsDistinctDedicatedClient && args.hasNewUrl && args.hasLegacyUrl) {
args.logger?.warn(
"run-ops split read fan-out is configured (RUN_OPS_DATABASE_URL and " +
"RUN_OPS_LEGACY_DATABASE_URL are both set) but the NEW client is not a distinct " +
"instance from the control-plane client; read fan-out is silently disabled."
);
}
return enabled;
}