98 lines
2.9 KiB
Ruby
98 lines
2.9 KiB
Ruby
require 'fiber'
|
|
require 'cartodb/sequel_connection_helper'
|
|
|
|
module CartoDB
|
|
class ConnectionPool
|
|
include CartoDB::SequelConnectionHelper
|
|
|
|
# Until migration to AR is done
|
|
MAX_POOL_SIZE = 600
|
|
|
|
def initialize
|
|
@pool = {}
|
|
end
|
|
|
|
# Intended only for testing
|
|
def all
|
|
@pool
|
|
end
|
|
|
|
def fetch(configuration, &block)
|
|
conn = nil
|
|
if @pool[connection_id(configuration)]
|
|
Rails.logger.debug "[pool] Found a connection for #{connection_id(configuration)} (#{@pool.keys.size})"
|
|
@pool[connection_id(configuration)][:last_accessed] = Time.now
|
|
conn = @pool[connection_id(configuration)][:connection]
|
|
else
|
|
conn = create_new_connection(configuration, &block)
|
|
end
|
|
# This conn may be still broken after 3 tries
|
|
return conn
|
|
end
|
|
|
|
def max_pool_size?
|
|
if @pool.size >= MAX_POOL_SIZE
|
|
#close_connections!
|
|
close_oldest_connection!
|
|
end
|
|
end
|
|
|
|
def create_new_connection(configuration, &block)
|
|
max_pool_size?
|
|
connection = yield
|
|
@pool[connection_id(configuration)] = { :connection => connection, :last_accessed => Time.now }
|
|
Rails.logger.debug "[pool] Creating a new connection for #{connection_id(configuration)} (#{@pool.keys.size})"
|
|
connection
|
|
end
|
|
|
|
def close_connections!(db=nil)
|
|
newpool = {}
|
|
@pool.each do |id, conn|
|
|
if ! db || ( id.start_with? "#{db}:" )
|
|
Rails.logger.debug "[pool] Dropping connection #{id}"
|
|
close_connection(conn[:connection], id)
|
|
else
|
|
Rails.logger.debug "[pool] Not dropping connection #{id}"
|
|
newpool[id] = conn
|
|
end
|
|
end
|
|
@pool = newpool
|
|
end
|
|
|
|
def close_oldest_connection!
|
|
older = nil
|
|
oldest_access = nil
|
|
@pool.each do |connection_id, conn|
|
|
if oldest_access.nil? || conn[:last_accessed] < oldest_access
|
|
oldest_access = conn[:last_accessed]
|
|
older = connection_id
|
|
end
|
|
end
|
|
close_connection(@pool[older][:connection], older)
|
|
@pool.delete(older)
|
|
end
|
|
|
|
private
|
|
|
|
def close_connection(connection, id)
|
|
if id.end_with?('sequel')
|
|
close_sequel_connection(connection)
|
|
else
|
|
connection.disconnect!
|
|
end
|
|
end
|
|
|
|
def connection_id(configuration)
|
|
# TODO: Due to migration from Sequel to ActiveRecord, afterwards can be used with only symbols
|
|
host = configuration.fetch(:host, configuration['host'])
|
|
database = configuration.fetch(:database, configuration['database'])
|
|
username = configuration.fetch(:username, configuration['username'])
|
|
orm = configuration.fetch(:orm, 'sequel')
|
|
port = configuration.fetch(:port, configuration['port'])
|
|
# Be aware of close_connections! and close_connection logic when prepending or appending new
|
|
# parameters to the id.
|
|
"#{host}:#{database}:#{port}:#{username}:#{orm}"
|
|
end
|
|
end
|
|
end
|