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module Gitlab
module Database
class ThreadedConnectionPool
def self.with_pool(pool_size)
pool = new(pool_size)
yield(pool)
ensure
pool.join
pool.close
end
def initialize(pool_size)
config = ActiveRecord::Base.configurations[Rails.env]
@ar_pool = ActiveRecord::Base.establish_connection(
config.merge(pool: pool_size))
@workers = []
@mutex = Mutex.new
end
def execute_async(sql)
@mutex.synchronize do
@workers << Thread.new do
@ar_pool.with_connection do |connection|
connection.execute(sql)
end
end
end
end
def join
threads = nil
@mutex.synchronize do
threads = @workers.dup
@workers.clear
end
threads.each(&:join)
end
def close
@ar_pool.disconnect!
end
end
end
end
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