Class: MySQLDBTool::Backup

Inherits:
Object
  • Object
show all
Defined in:
lib/mysql_db_tool/backup.rb

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Backup

Returns a new instance of Backup.



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# File 'lib/mysql_db_tool/backup.rb', line 9

def initialize(options = {})
  @options = options
  tableConfig = MySQLDBTool::Config::ConfigLoader.load(options[:env])
  @data_tables = tableConfig[:data_tables]
  @ignore_tables = tableConfig[:ignore_tables]
  @db_info = tableConfig[:db_info]
  
  @db_info[:database] = @options[:database] if @options[:database]
end

Instance Method Details

#gzipCommand(command, isGzip, file, gzipSuffix = '.gz') ⇒ Object 



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# File 'lib/mysql_db_tool/backup.rb', line 67

def gzipCommand(command, isGzip, file, gzipSuffix = '.gz')
  "#{command} #{isGzip ? '| gzip ' : ''} > #{file}#{isGzip ? gzipSuffix : ''}"
end

#perform ⇒ Object 



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# File 'lib/mysql_db_tool/backup.rb', line 19

def perform

  verify_tools_exist

  id=@options[:id] || "0"
  isGzip=@options[:gzip]
  limitDays=@options[:limit_days] || 3
  gzipSuffix = @options[:gzip_suffix] || '.gz'

  Array(@db_info[:database]).flat_map.each_with_index do |database, index |

    defaultOptions="--column-statistics=0 #{mysqlDefaultOptions(@db_info, database)}"
    backupDir=backupDirName(id, "#{index}_#{database}")

    commands = []
    if File.exist? backupDir
      puts "[skip - directory exists] #{backupDir}"
      return commands
    end
    commands.push "mkdir -p #{backupDir}"

    backupFile="#{backupDir}/#{DateTime.now.strftime("%Y-%m-%d")}_#{id}"
    whereDate=(Date.today - limitDays).strftime("%Y-%m-%d 00:00:00")
    options=ENV['DUMP_OPTIONS'] || "--single-transaction --skip-lock-tables"

    puts "backupFile=#{backupFile}"

    ignoreTablesOption = @ignore_tables.map { |e| "--ignore-table=#{e.include?('.') ? e : "#{database}.#{e}"}" }.join(' ')

    commands.push gzipCommand("mysqldump --no-data #{ignoreTablesOption} #{defaultOptions}", isGzip, "#{backupFile}-schema.sql", gzipSuffix)

    backupTables = []

    @data_tables.each {|table|
      where = table[:where].empty? ? "" : "--where=\"#{table[:where]} >= '#{whereDate}'\""
      if where.empty?
        backupTables.push(table[:name])
        next
      else
        commands.push(gzipCommand("mysqldump --no-create-info #{options} #{where} #{defaultOptions} #{table[:name]}", isGzip, "#{backupFile}-#{table[:name]}.sql", gzipSuffix))
      end
    }

    commands.push(gzipCommand("mysqldump --no-create-info #{ignoreTablesOption} #{options} #{defaultOptions} #{backupTables.join(' ')}", isGzip, "#{backupFile}-all-other-tables.sql", gzipSuffix))
    commands
  end
end