Class: MysqlRakeTasks::Tasks

Inherits:
Object
  • Object
show all
Defined in:
lib/mysql_rake_tasks/tasks.rb

Class Method Summary collapse

Class Method Details

.create_user_sql(config) ⇒ Object 



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# File 'lib/mysql_rake_tasks/tasks.rb', line 63

def self.create_user_sql(config)
  if config.nil? then
    return ""
  end

  if config['username'].nil? then
    puts 'Error code: missing username entry'
  end

  sql  = <<-SQL
    GRANT
    ALL PRIVILEGES
    ON #{config['database']}.*
    TO #{config['username']}@localhost
    IDENTIFIED BY '#{config['password']}';
  SQL
end

.create_users(args) ⇒ Object

creates user permissions for mysql database for localhost only



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# File 'lib/mysql_rake_tasks/tasks.rb', line 35

def self.create_users(args)
  args = self.get_input(args)
  @root_user = args[:root_user]
  @pass = args[:pass]

  # create a mysql user for each listing in database.yml file
  Rails::configuration.database_configuration.each do |listing|
    begin
 @config = listing[1]
      db = Mysql2::Client.new(
           :host => 'localhost',
           :username => @root_user,
           :password => @pass,
           :socket => @config['socket'])

      sql = self.create_user_sql(@config)
      db.query sql
	  $stdout.puts "Created #{@config['username']} on #{@config['database']}\n"
    rescue Mysql2::Error => e
      $stdout.puts "Error code: #{e.errno}"
      $stdout.puts "Error message: #{e.error}"
      $stdout.puts "Error SQLSTATE: #{e.sqlstate}" if e.respond_to?("sqlstate")
    ensure # disconnect from server
      db.close if db
    end
  end
end

.get_input(*args) ⇒ Object

Parses input args for username and password, if not given it will prompt the user



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# File 'lib/mysql_rake_tasks/tasks.rb', line 15

def self.get_input(*args)
  if !args[0].nil? then
    root_user = args[0][:root_user]
    root_pass = args[0][:pass]
  end

  if root_user.nil? or root_pass.nil? then
    $stdout.puts 'mysql user:'
    root_user = $stdin.gets.chomp

	$stdout.puts 'mysql password:'
    system 'stty -echo'
    root_pass = $stdin.gets.chomp
    system 'stty echo'
  end

  {:root_user => root_user, :pass => root_pass}
end

.print_header ⇒ Object 



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# File 'lib/mysql_rake_tasks/tasks.rb', line 120

def self.print_header
  print_separator
  printf "| %30s | %13s | %9s | %8s | %8s |\n",
    "Table Name".ljust(30), "Rows", "Data Size", "IDX Size", "Total Size"
   print_separator
end

.print_separator ⇒ Object 



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# File 'lib/mysql_rake_tasks/tasks.rb', line 116

def self.print_separator
  puts   "+--------------------------------+---------------+-----------+----------+------------+"
end

.stats ⇒ Object 



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# File 'lib/mysql_rake_tasks/tasks.rb', line 81

def self.stats
  config = Rails::configuration.database_configuration[Rails.env]

  begin
    dbh = Mysql2::Client.new( :host => config['host'], :username => config['username'], :password => config['password'])
    sql = stats_query(config['database'])
    result = dbh.query sql

    print_header
    db_total = 0
    result.each  do |row|
      printf "| %30s | %13s | %9s | %8s | %10s |\n",
        row["table_name"].ljust(30),
        number_to_human(row["rows"]).rjust(13),
        number_to_human_size(row["data"]),
        number_to_human_size(row["idx"]),
        number_to_human_size(row["total_size"])

	  db_total += row["total_size"].to_i
    end

    print_separator
    printf "|%70s | %10s |\n",'',  number_to_human_size(db_total)
    print_separator
    puts "Database: #{config['database']}  MySQL Server Version: #{dbh.info[:version]}\n"
    puts " "
  rescue Mysql2::Error => e
    puts "Error code: #{e.errno}"
    puts "Error message: #{e.error}"
    puts "Error SQLSTATE: #{e.sqlstate}" if e.respond_to?("sqlstate")
  ensure
    dbh.close if dbh
  end
end

.stats_query(db_name) ⇒ Object 



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# File 'lib/mysql_rake_tasks/tasks.rb', line 127

def self.stats_query(db_name)
  sql = <<-SQL
      SELECT table_name,
      concat(table_rows) rows,
      concat(data_length) data,
      concat(index_length) idx,
      concat(data_length+index_length) total_size
      FROM information_schema.TABLES
      WHERE table_schema LIKE '#{db_name}'
      ORDER BY table_name;
  SQL
end