# == Define: oslo::db
#
# Configure oslo_db options
#
# This resource configures Oslo database configs for an OpenStack service.
# It will manage the [database] section in the given config resource.
#
# === Parameters:
#
# [*sqlite_synchronous*]
#   (Optional) If True, SQLite uses synchronous mode (boolean value).
#   Defaults to $::os_service_default
#
# [*backend*]
#   (Optional) The back end to use for the database.
#   Defaults to $::os_service_default
#
# [*manage_backend_package*]
#   (Optional) Whether to install the backend package.
#   Defaults to true.
#
# [*backend_package_ensure*]
#   (Optional) Desired ensure state of the backend database package,
#   accepts latest or specific versions.
#   Defaults to present.
#
# [*connection*]
#   (Optional) The SQLAlchemy connection string to use to connect to the database.
#   Defaults to $::os_service_default
#
# [*slave_connection*]
#   (Optional) The SQLAlchemy connection string to use to connect to the slave database.
#   Defaults to $::os_service_default
#
# [*mysql_sql_mode*]
#   (Optional) The SQL mode to be used for MySQL sessions.
#   Defaults to $::os_service_default
#
# [*idle_timeout*]
#   (Optional) Timeout before idle SQL connections are reaped.
#   Defaults to $::os_service_default
#
# [*min_pool_size*]
#   (Optional) Minimum number of SQL connections to keep open in a pool.
#   Defaults to $::os_service_default
#
# [*max_pool_size*]
#   (Optional) Maximum number of SQL connections to keep open in a pool.
#   Defaults to $::os_service_default
#
# [*max_retries*]
#   (Optional) Maximum number of database connection retries during startup.
#   Set to -1 to specify an infinite retry count.
#   Defaults to $::os_service_default
#
# [*retry_interval*]
#   (Optional) Interval between retries of opening a SQL connection.
#   Defaults to $::os_service_default
#
# [*max_overflow*]
#   (Optional) If set, use this value for max_overflow with SQLALchemy.
#   Defaults to $::os_service_default
#
# [*connection_debug*]
#   (Optional) Verbosity of SQL debugging information: 0=None, 100=Everything.
#   Defaults to $::os_service_default
#
# [*connection_trace*]
#   (Optional) Add Python stack traces to SQL as comment strings (boolean value).
#   Defaults to $::os_service_default
#
# [*pool_timeout*]
#   (Optional) If set, use this value for pool_timeout with SQLAlchemy.
#   Defaults to $::os_service_default
#
# [*use_db_reconnect*]
#   (Optional) Enable the experimental use of database reconnect on connection lost (boolean value)
#   Defaults to $::os_service_default
#
# [*db_retry_interval*]
#   (Optional) Seconds between retries of a database transaction.
#   Defaults to $::os_service_default
#
# [*db_inc_retry_interval*]
#   (Optional) If True, increases the interval between retries of
#   a database operation up to db_max_retry_interval.
#   Defaults to $::os_service_default
#
# [*db_max_retry_interval*]
#   (Optional) If db_inc_retry_interval is set, the maximum seconds between
#   retries of adatabase operation.
#   Defaults to $::os_service_default
#
# [*db_max_retries*]
#   (Optional) Maximum retries in case of connection error or deadlock error
#   before error is raised. Set to -1 to specify an infinite retry count.
#   Defaults to $::os_service_default
#
# [*use_tpool*]
#   (Optional) Enable the experimental use of thread pooling for all DB API calls (boolean value)
#   Defaults to $::os_service_default
#
define oslo::db(
  $sqlite_synchronous     = $::os_service_default,
  $backend                = $::os_service_default,
  $manage_backend_package = true,
  $backend_package_ensure = present,
  $connection             = $::os_service_default,
  $slave_connection       = $::os_service_default,
  $mysql_sql_mode         = $::os_service_default,
  $idle_timeout           = $::os_service_default,
  $min_pool_size          = $::os_service_default,
  $max_pool_size          = $::os_service_default,
  $max_retries            = $::os_service_default,
  $retry_interval         = $::os_service_default,
  $max_overflow           = $::os_service_default,
  $connection_debug       = $::os_service_default,
  $connection_trace       = $::os_service_default,
  $pool_timeout           = $::os_service_default,
  $use_db_reconnect       = $::os_service_default,
  $db_retry_interval      = $::os_service_default,
  $db_inc_retry_interval  = $::os_service_default,
  $db_max_retry_interval  = $::os_service_default,
  $db_max_retries         = $::os_service_default,
  $use_tpool              = $::os_service_default,
) {

  include ::oslo::params

  if !is_service_default($connection) {

    validate_re($connection,
      '^(sqlite|mysql(\+pymysql)?|postgresql(\+psycopg2)?|mongodb):\/\/(\S+:\S+@\S+\/\S+)?')

    if $manage_backend_package {
      case $connection {
        /^mysql(\+pymysql)?:\/\//: {
          require '::mysql::bindings'
          require '::mysql::bindings::python'
          if $connection =~ /^mysql\+pymysql/ {
            $backend_package = $::oslo::params::pymysql_package_name
          } else {
            $backend_package = false
          }
        }
        /^postgresql(\+psycopg2)?:\/\//: {
          $backend_package = false
          require '::postgresql::lib::python'
        }
        /^mongodb:\/\//: {
          $backend_package = $::oslo::params::pymongo_package_name
        }
        /^sqlite:\/\//: {
          $backend_package = $::oslo::params::sqlite_package_name
        }
        default: {
          fail('Unsupported backend configured')
        }
      }

      if $backend_package and !defined(Package[$backend_package]) {
        package { $backend_package:
          ensure => $backend_package_ensure,
          name   => $backend_package,
          tag    => 'openstack',
        }
      }
    }
  }

  $database_options = {
    'database/sqlite_synchronous'    => { value => $sqlite_synchronous },
    'database/backend'               => { value => $backend },
    'database/connection'            => { value => $connection, secret => true },
    'database/slave_connection'      => { value => $slave_connection, secret => true },
    'database/mysql_sql_mode'        => { value => $mysql_sql_mode },
    'database/idle_timeout'          => { value => $idle_timeout },
    'database/min_pool_size'         => { value => $min_pool_size },
    'database/max_pool_size'         => { value => $max_pool_size },
    'database/max_retries'           => { value => $max_retries },
    'database/retry_interval'        => { value => $retry_interval },
    'database/max_overflow'          => { value => $max_overflow },
    'database/connection_debug'      => { value => $connection_debug },
    'database/connection_trace'      => { value => $connection_trace },
    'database/pool_timeout'          => { value => $pool_timeout },
    'database/use_db_reconnect'      => { value => $use_db_reconnect },
    'database/db_retry_interval'     => { value => $db_retry_interval },
    'database/db_inc_retry_interval' => { value => $db_inc_retry_interval },
    'database/db_max_retry_interval' => { value => $db_max_retry_interval },
    'database/db_max_retries'        => { value => $db_max_retries },
    'database/use_tpool'             => { value => $use_tpool },
  }

  create_resources($name, $database_options)

}