class Fluent::MysqlBulkOutput

Attributes

handler[RW]

Public Class Methods

new() click to toggle source
Calls superclass method
# File lib/fluent/plugin/out_mysql_bulk.rb, line 20
def initialize
  super
  require 'mysql2-cs-bind'
end

Public Instance Methods

client() click to toggle source
# File lib/fluent/plugin/out_mysql_bulk.rb, line 74
def client
  Mysql2::Client.new(
      host: @host,
      port: @port,
      username: @username,
      password: @password,
      database: @database,
      flags: Mysql2::Client::MULTI_STATEMENTS
    )
end
configure(conf) click to toggle source
Calls superclass method
# File lib/fluent/plugin/out_mysql_bulk.rb, line 25
def configure(conf)
  super

  if @column_names.nil?
    fail Fluent::ConfigError, 'column_names MUST specified, but missing'
  end

  if @on_duplicate_key_update
    if @on_duplicate_update_keys.nil?
      fail Fluent::ConfigError, 'on_duplicate_key_update = true , on_duplicate_update_keys nil!'
    end
    @on_duplicate_update_keys = @on_duplicate_update_keys.split(',')

    @on_duplicate_key_update_sql = ' ON DUPLICATE KEY UPDATE '
    updates = []
    @on_duplicate_update_keys.each do |update_column|
      updates << "#{update_column} = VALUES(#{update_column})"
    end
    @on_duplicate_key_update_sql += updates.join(',')
  end

  @column_names = @column_names.split(',')
  @key_names = @key_names.nil? ? @column_names : @key_names.split(',')
end
format(tag, time, record) click to toggle source
# File lib/fluent/plugin/out_mysql_bulk.rb, line 70
def format(tag, time, record)
  [tag, time, format_proc.call(tag, time, record)].to_msgpack
end
shutdown() click to toggle source
Calls superclass method
# File lib/fluent/plugin/out_mysql_bulk.rb, line 66
def shutdown
  super
end
start() click to toggle source
Calls superclass method
# File lib/fluent/plugin/out_mysql_bulk.rb, line 50
def start
  super
  result = client.xquery("SHOW COLUMNS FROM #{@table}")
  @max_lengths = []
  @column_names.each do |column|
    info = result.select { |x| x['Field'] == column }.first
    r = /(char|varchar)\(([\d]+)\)/
    begin
      max_length = info['Type'].scan(r)[0][1].to_i
    rescue
      max_length = nil
    end
    @max_lengths << max_length
  end
end
write(chunk) click to toggle source
# File lib/fluent/plugin/out_mysql_bulk.rb, line 85
def write(chunk)
  @handler = client
  values = []
  values_template = "(#{ @column_names.map { |key| '?' }.join(',') })"
  chunk.msgpack_each do |tag, time, data|
    values << Mysql2::Client.pseudo_bind(values_template, data)
  end
  sql = "INSERT INTO #{@table} (#{@column_names.join(',')}) VALUES #{values.join(',')}"
  sql += @on_duplicate_key_update_sql if @on_duplicate_key_update

  $log.info "bulk insert values size => #{values.size}"
  @handler.xquery(sql)
  @handler.close
end

Private Instance Methods

format_proc() click to toggle source
# File lib/fluent/plugin/out_mysql_bulk.rb, line 102
def format_proc
  proc do |tag, time, record|
    values = []
    @key_names.each_with_index do |key, i|
      if key == '${time}'
        value = Time.at(time).strftime('%Y-%m-%d %H:%M:%S')
      else
        if @max_lengths[i].nil? || record[key].nil?
          value = record[key]
        else
          value = record[key].slice(0, @max_lengths[i])
        end
      end
      values << value
    end
    values
  end
end