Created
September 28, 2015 12:15
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redis_smtp_scheduler.rb
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| require 'rubygems' | |
| require 'redis' | |
| r = Redis.new(:host => "127.0.0.1", :port => 6379, :db => 5) | |
| r.multi do | |
| r.del 'smtp_servers' | |
| r.del 'smtp_servers_conf' | |
| r.rpush 'smtp_servers', 11 | |
| r.rpush 'smtp_servers', 12 | |
| r.rpush 'smtp_servers', 13 | |
| r.hmset 'smtp_servers_conf', 11, 3, 12, 1, 13, 2 | |
| r.hmset 'smtp_status', 'current', 0, 'sent', 0 | |
| end | |
| NextSMTPScript = <<EOF | |
| local current = redis.call('hget', 'smtp_status', 'current') | |
| local sent = redis.call('hget', 'smtp_status', 'sent') | |
| local current_id = redis.call('lindex', 'smtp_servers', current) | |
| local max = redis.call('hget', 'smtp_servers_conf', current_id) | |
| local res | |
| if sent == max then | |
| local new_current = current + 1 | |
| local server_size = redis.call('llen', 'smtp_servers') | |
| if new_current == server_size then | |
| new_current = 0 | |
| end | |
| res = redis.call('lindex', 'smtp_servers', new_current) | |
| redis.call('hmset', 'smtp_status', 'current', new_current, 'sent', 0) | |
| else | |
| res = current_id | |
| end | |
| redis.call('hincrby', 'smtp_status', 'sent', 1) | |
| return res | |
| EOF | |
| sha1 = r.script :load, NextSMTPScript | |
| puts r.evalsha(sha1,[]) | |
| # => 11 | |
| puts r.evalsha(sha1,[]) | |
| # => 11 | |
| puts r.evalsha(sha1,[]) | |
| # => 11 | |
| puts r.evalsha(sha1,[]) | |
| # => 12 | |
| puts r.evalsha(sha1,[]) | |
| # => 13 | |
| puts r.evalsha(sha1,[]) | |
| # => 13 | |
| puts r.evalsha(sha1,[]) | |
| # => 11 | |
| puts r.hgetall 'smtp_status' | |
| # => {"current"=>"0", "sent"=>"1"} |
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