mirror of
https://github.com/mastodon/mastodon.git
synced 2024-12-05 10:19:59 +00:00
115 lines
2.4 KiB
Ruby
115 lines
2.4 KiB
Ruby
|
# frozen_string_literal: true
|
||
|
|
||
|
require_relative './connection_pool/shared_connection_pool'
|
||
|
|
||
|
class RequestPool
|
||
|
def self.current
|
||
|
@current ||= RequestPool.new
|
||
|
end
|
||
|
|
||
|
class Reaper
|
||
|
attr_reader :pool, :frequency
|
||
|
|
||
|
def initialize(pool, frequency)
|
||
|
@pool = pool
|
||
|
@frequency = frequency
|
||
|
end
|
||
|
|
||
|
def run
|
||
|
return unless frequency&.positive?
|
||
|
|
||
|
Thread.new(frequency, pool) do |t, p|
|
||
|
loop do
|
||
|
sleep t
|
||
|
p.flush
|
||
|
end
|
||
|
end
|
||
|
end
|
||
|
end
|
||
|
|
||
|
MAX_IDLE_TIME = 30
|
||
|
WAIT_TIMEOUT = 5
|
||
|
MAX_POOL_SIZE = ENV.fetch('MAX_REQUEST_POOL_SIZE', 512).to_i
|
||
|
|
||
|
class Connection
|
||
|
attr_reader :site, :last_used_at, :created_at, :in_use, :dead, :fresh
|
||
|
|
||
|
def initialize(site)
|
||
|
@site = site
|
||
|
@http_client = http_client
|
||
|
@last_used_at = nil
|
||
|
@created_at = current_time
|
||
|
@dead = false
|
||
|
@fresh = true
|
||
|
end
|
||
|
|
||
|
def use
|
||
|
@last_used_at = current_time
|
||
|
@in_use = true
|
||
|
|
||
|
retries = 0
|
||
|
|
||
|
begin
|
||
|
yield @http_client
|
||
|
rescue HTTP::ConnectionError
|
||
|
# It's possible the connection was closed, so let's
|
||
|
# try re-opening it once
|
||
|
|
||
|
close
|
||
|
|
||
|
if @fresh || retries.positive?
|
||
|
raise
|
||
|
else
|
||
|
@http_client = http_client
|
||
|
retries += 1
|
||
|
retry
|
||
|
end
|
||
|
rescue StandardError
|
||
|
# If this connection raises errors of any kind, it's
|
||
|
# better if it gets reaped as soon as possible
|
||
|
|
||
|
close
|
||
|
@dead = true
|
||
|
raise
|
||
|
end
|
||
|
ensure
|
||
|
@fresh = false
|
||
|
@in_use = false
|
||
|
end
|
||
|
|
||
|
def seconds_idle
|
||
|
current_time - (@last_used_at || @created_at)
|
||
|
end
|
||
|
|
||
|
def close
|
||
|
@http_client.close
|
||
|
end
|
||
|
|
||
|
private
|
||
|
|
||
|
def http_client
|
||
|
Request.http_client.persistent(@site, timeout: MAX_IDLE_TIME)
|
||
|
end
|
||
|
|
||
|
def current_time
|
||
|
Process.clock_gettime(Process::CLOCK_MONOTONIC)
|
||
|
end
|
||
|
end
|
||
|
|
||
|
def initialize
|
||
|
@pool = ConnectionPool::SharedConnectionPool.new(size: MAX_POOL_SIZE, timeout: WAIT_TIMEOUT) { |site| Connection.new(site) }
|
||
|
@reaper = Reaper.new(self, 30)
|
||
|
@reaper.run
|
||
|
end
|
||
|
|
||
|
def with(site, &block)
|
||
|
@pool.with(site) do |connection|
|
||
|
ActiveSupport::Notifications.instrument('with.request_pool', miss: connection.fresh, host: connection.site) do
|
||
|
connection.use(&block)
|
||
|
end
|
||
|
end
|
||
|
end
|
||
|
|
||
|
delegate :size, :flush, to: :@pool
|
||
|
end
|