Compute Staggered TTL for Codelist

Computes a deterministic TTL for a codelist based on a hash of its ID. This distributes codelist expirations across a time window to prevent all codelists from expiring simultaneously (thundering herd problem).

Usage

compute_codelist_ttl(codelist_id, base_ttl = NULL, jitter_days = NULL)

Arguments

codelist_id

Character string, codelist ID (e.g., "CL_FREQ")

base_ttl

Numeric, minimum TTL in days. Default from config (14)

jitter_days

Numeric, distribution window in days. Default from config (14)

Value

Numeric TTL in days (base_ttl to base_ttl + jitter_days - 1)

Examples

if (FALSE) { # \dontrun{
# Compute TTL for a codelist
ttl <- compute_codelist_ttl("CL_FREQ")
# Returns a value between 14 and 27 days

# Different codelists get different TTLs
ttl1 <- compute_codelist_ttl("CL_FREQ")
ttl2 <- compute_codelist_ttl("CL_ITTER107")
# ttl1 and ttl2 are deterministic but likely different
} # }