zitadel/internal/cache/connector/redis/get.lua
Tim Möhlmann 250f2344c8
feat(cache): redis cache (#8822)
# Which Problems Are Solved

Add a cache implementation using Redis single mode. This does not add
support for Redis Cluster or sentinel.

# How the Problems Are Solved

Added the `internal/cache/redis` package. All operations occur
atomically, including setting of secondary indexes, using LUA scripts
where needed.

The [`miniredis`](https://github.com/alicebob/miniredis) package is used
to run unit tests.

# Additional Changes

- Move connector code to `internal/cache/connector/...` and remove
duplicate code from `query` and `command` packages.
- Fix a missed invalidation on the restrictions projection

# Additional Context

Closes #8130
2024-11-04 10:44:51 +00:00

30 lines
759 B
Lua

local result = redis.call("GET", KEYS[1])
if result == false then
return nil
end
local object_id = tostring(result)
local object = getCall("HGET", object_id, "object")
if object == nil then
-- object expired, but there are keys that need to be cleaned up
remove(object_id)
return nil
end
-- max-age must be checked manually
local expiry = getCall("HGET", object_id, "expiry")
if not (expiry == nil) and expiry > 0 then
if getTime() > expiry then
remove(object_id)
return nil
end
end
local usage_lifetime = getCall("HGET", object_id, "usage_lifetime")
-- reset usage based TTL
if not (usage_lifetime == nil) and tonumber(usage_lifetime) > 0 then
redis.call('EXPIRE', object_id, usage_lifetime)
end
return object