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|
require "time"
module EM
class Connection
def send_chunk(data)
send_data(data + "\r\n")
end
end
end
class Receiver::Worker < DaemonSpawn::Base
class DBProxyServer < EM::Connection
$worker_count = nil
@@wq = EM::WorkQueue::WorkQueue.new do |arg|
begin
begin
json = ::Yajl::Parser.parse(arg.last, :symbolize_keys => true)
rescue ::Yajl::ParseError
# JSON parse error....??
p $!
end
case arg.first
when "USER"
$logger.debug("Received User")
rec = User.find_or_initialize_by(:id => json[:id])
rec.screen_name = json[:screen_name]
rec.name = json[:name]
rec.profile_image_url = json[:profile_image_url]
rec.save! if rec.changed?
when "TWEET"
$logger.debug("Received Tweet")
begin
Tweet.create!(:id => json[:id],
:text => json[:text],
:source => json[:source],
:tweeted_at => Time.parse(json[:tweeted_at]),
:user_id => json[:user_id])
$logger.debug("Saved Tweet")
rescue ActiveRecord::RecordNotUnique
$logger.info("Can't Save Tweet: Duplicate")
end
when "FAVORITE"
$logger.debug("Received Favorite")
begin
Favorite.create!(:tweet_id => json[:tweet_id],
:user_id => json[:user_id])
$logger.debug("Saved Favorite")
rescue ActiveRecord::RecordNotUnique
$logger.info("Can't Save Tweet: Duplicate")
end
when "UNFAVORITE"
Favorite
.where("tweet_id = #{json[:tweet_id]} AND user_id = #{json[:user_id]}")
.destroy_all
when "RETWEET"
$logger.debug("Received Retweet")
begin
Retweet.create!(:id => json[:id],
:tweet_id => json[:tweet_id],
:user_id => json[:user_id])
$logger.debug("Saved Retweet")
rescue ActiveRecord::RecordNotUnique
$logger.info("Can't Save Retweet: Duplicate")
end
when "DELETE"
tweet = Tweet.find_by(:id => json[:id]) || Retweet.find_by(:id => json[:id])
if tweet
tweet.destroy
end
else
# ???
puts "???????"
end
rescue
$logger.error($!)
$logger.error($@)
end
end
@@wq.start
def initialize
@worker_number = nil
@receive_buf = ""
end
def post_init
# なにもしない。クライアントが
end
def unbind
$connections.delete_if{|k, v| v == self}
$logger.info("Connection closed")
end
def send_account_all
Account.where("id % ? = ?", $worker_count, @worker_number).each do |account|
puts "Sent #{account.id}/#{account.user_id}"
send_account(account)
end
end
def send_account(account)
send_chunk("ACCOUNT #{Yajl::Encoder.encode(account.attributes)}")
end
def receive_data(data)
@receive_buf << data
while line = @receive_buf.slice!(/.+?\r\n/)
line.chomp!
next if line == ""
arg = line.split(/ /, 2)
case arg.first
when "CONNECT"
begin
json = ::Yajl::Parser.parse(arg.last, :symbolize_keys => true)
rescue ::Yajl::ParseError
# JSON parse error....??
p $!
end
secret_key = json[:secret_key]
worker_number = json[:worker_number]
worker_count = json[:worker_count]
if secret_key == Settings.secret_key
if $worker_count != worker_count && $connections.size > 0
$logger.error("Error: Worker Count Difference: $worker_count=#{$worker_count}, worker_count=#{worker_count}")
send_chunk("ERROR Invalid Worker Count")
close_connection_after_writing
else
$worker_count = worker_count
$connections[worker_number] = self
@worker_number = worker_number
@authorized = true
$logger.info("Connected: #{worker_number}")
send_chunk("OK Connected")
send_account_all
end
else
$logger.error("Error: Invalid Secret Key")
send_chunk("ERROR Invalid Secret Key")
close_connection_after_writing
end
when "UNAUTHORIZED"
$logger.warn("Unauthorized: #{arg.last}")
# unregister
when "QUIT"
$logger.info("Quit: #{@worker_number}")
send_chunk("BYE")
close_connection_after_writing
else
if @authorized
@@wq.push arg
end
end
end
end
end
class RegisterServer < EM::Connection
def initialize
@receive_buf = ""
end
def post_init
end
def receive_data(data)
@receive_buf << data
while line = @receive_buf.slice!(/.+?\r\n/)
line.chomp!
next if line == ""
p line
sp = line.split(/ /, 2)
if sp.first == "REGISTER"
if sp.last =~ /^[0-9]+$/
account = Account.find_by(:id => sp.last.to_i)
if account
if con = $connections[account.id % $worker_count]
con.send_account(account)
send_chunk("OK Registered")
else
send_chunk("OK Worker not found")
end
else
$logger.error("Unknown account: #{sp.last}")
send_chunk("ERROR Unknown Account")
end
else
$logger.error("Invalid User ID")
send_chunk("ERROR Invalid User ID")
end
else
$logger.error("Unknown Command: #{sp})")
send_chunk("ERROR Unknown command")
end
close_connection_after_writing
return
end
end
end
def initialize(opts = {})
super(opts)
$logger = Receiver::Logger.new(:warn)
$connections = {}
end
def start(args)
$logger.info("Database Proxy Started")
EM.run do
stop = Proc.new do
EM.stop
end
Signal.trap(:INT, &stop)
Signal.trap(:QUIT, &stop)
Signal.trap(:TERM, &stop)
EM.start_server("0.0.0.0", Settings.db_proxy_port, DBProxyServer)
EM.start_unix_domain_server(Settings.register_server_path, RegisterServer)
end
end
def stop
end
end
|
