riotpiaole
a04c76a684
Implements the kmsvc: key schema (inflight, pending/watermark keyed by shard+partition, vis_index, dedup, fifo_lock, queue meta, shard map) plus the atomic reap/ack Lua scripts used for safe multi-replica redelivery and DLQ routing.
38 lines
990 B
Lua
38 lines
990 B
Lua
-- Atomic ack for DeleteMessage (design.md §3).
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-- KEYS[1] = inflight key
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-- KEYS[2] = vis_index key (queue-level)
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-- ARGV[1] = receiptHandle
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-- ARGV[2] = queueName
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--
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-- Returns {"not_found"} if the message is already gone (already acked, or
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-- already DLQ-routed/redelivered by the reaper).
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-- Returns {"acked"} otherwise.
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local inflight = redis.call('HGETALL', KEYS[1])
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if #inflight == 0 then
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return {'not_found'}
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end
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local m = {}
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for i = 1, #inflight, 2 do
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m[inflight[i]] = inflight[i + 1]
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end
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local queueName = ARGV[2]
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redis.call('ZREM', KEYS[2], ARGV[1])
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local pendingKey = 'kmsvc:pending:' .. queueName .. ':' .. m['shardId'] .. ':' .. m['partition']
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redis.call('ZREM', pendingKey, m['offset'])
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redis.call('DEL', KEYS[1])
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if m['groupId'] and m['groupId'] ~= '' then
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local lockKey = 'kmsvc:fifo_lock:' .. queueName .. ':' .. m['groupId']
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local lockVal = redis.call('GET', lockKey)
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if lockVal == ARGV[1] then
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redis.call('DEL', lockKey)
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end
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end
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return {'acked'}
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