Class: DB2Fog

Inherits:
Object
  • Object
show all
Defined in:
lib/db2fog.rb,
lib/db2fog/railtie.rb

Defined Under Namespace

Classes: FogStore, MysqlAdaptor, PsqlAdaptor, Railtie

Instance Method Summary collapse

Instance Method Details

#backup ⇒ Object 



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# File 'lib/db2fog.rb', line 13

def backup
  file_name = "dump-#{db_credentials[:database]}-#{Time.now.utc.strftime("%Y%m%d%H%M")}.sql.gz"
  store.store(file_name, open(database.dump))
  store.store(most_recent_dump_file_name, file_name)
end

#clean ⇒ Object 



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# File 'lib/db2fog.rb', line 25

def clean
  to_keep = []
  # only consider files that belong to db2fog. Other files are ignored
  filelist = store.list.select {|file|
    file.include?(db_credentials[:database]) && file.match(/\d{12}.sql.gz\Z/)
  }
  files = filelist.map { |file|
    {
      :path => file,
      :date => Time.parse(file.split('-').last.split('.').first)
    }
  }
  # Keep all backups from the past day
  files.select {|x| x[:date] >= 1.day.ago }.each do |backup_for_day|
    to_keep << backup_for_day
  end

  # Keep one backup per day from the last week
  files.select {|x| x[:date] >= 1.week.ago }.group_by {|x| x[:date].strftime("%Y%m%d") }.values.each do |backups_for_last_week|
    to_keep << backups_for_last_week.sort_by{|x| x[:date].strftime("%Y%m%d") }.first
  end

  # Keep one backup per week since forever
  files.group_by {|x| x[:date].strftime("%Y%W") }.values.each do |backups_for_week|
    to_keep << backups_for_week.sort_by{|x| x[:date].strftime("%Y%m%d") }.first
  end

  to_destroy = filelist - to_keep.uniq.collect {|x| x[:path] }
  to_destroy.each do |file|
    store.delete(file.split('/').last)
  end
end

#restore ⇒ Object 



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# File 'lib/db2fog.rb', line 19

def restore
  dump_file_name = store.fetch(most_recent_dump_file_name).read
  file = store.fetch(dump_file_name)
  database.restore(file.path)
end