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<?php
namespace Laravel\Horizon;
class LuaScripts
{
/**
* Update the metrics for a job.
*
* KEYS[1] - The name of the key being updated
* KEYS[2] - The name of the key of the metrics group
* ARGV[1] - The runtime in milliseconds of the current job
*
* @return string
*/
public static function updateMetrics()
{
return <<<'LUA'
redis.call('hsetnx', KEYS[1], 'throughput', 0)
redis.call('sadd', KEYS[2], KEYS[1])
local hash = redis.call('hmget', KEYS[1], 'throughput', 'runtime')
local throughput = hash[1] + 1
local runtime = 0
if hash[2] then
runtime = ((hash[1] * tonumber(hash[2])) + tonumber(ARGV[1])) / throughput
else
runtime = tonumber(ARGV[1])
end
redis.call('hmset', KEYS[1], 'throughput', throughput, 'runtime', runtime)
LUA;
}
/**
* Get the Lua script for purging recent and pending jobs off of the queue.
*
* KEYS[1] - The name of the recent jobs sorted set
* KEYS[2] - The name of the pending jobs sorted set
* ARGV[1] - The prefix of the Horizon keys
* ARGV[2] - The name of the queue to purge
*
* @return string
*/
public static function purge()
{
return <<<'LUA'
local count = 0
local cursor = 0
repeat
-- Iterate over the recent jobs sorted set
local scanner = redis.call('zscan', KEYS[1], cursor)
cursor = scanner[1]
for i = 1, #scanner[2], 2 do
local jobid = scanner[2][i]
local hashkey = ARGV[1] .. jobid
local job = redis.call('hmget', hashkey, 'status', 'queue')
-- Delete the pending/reserved jobs, that match the queue
-- name, from the sorted sets as well as the job hash
if((job[1] == 'reserved' or job[1] == 'pending') and job[2] == ARGV[2]) then
redis.call('zrem', KEYS[1], jobid)
redis.call('zrem', KEYS[2], jobid)
redis.call('del', hashkey)
count = count + 1
end
end
until cursor == '0'
return count
LUA;
}
}