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# Copyright 2011-2013 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"). You
# may not use this file except in compliance with the License. A copy of
# the License is located at
#
# http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file is
# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
# ANY KIND, either express or implied. See the License for the specific
# language governing permissions and limitations under the License.
module AWS
class SimpleDB
# SimpleDB can report on the amount of data stored in a domain,
# the number of items, etc.
#
# @example
#
# sdb = SimpleDB.new
# sdb.domains['mydomain'].metadata.to_h
#
# # the hash returned above might look like:
# {
# :timestamp => 1300841880,
# :attribute_names_size_bytes => 12,
# :item_count => 1,
# :attribute_value_count => 6,
# :attribute_values_size_bytes => 25,
# :item_names_size_bytes => 3,
# :attribute_name_count => 3
# }
#
class DomainMetadata
include Core::Model
# @api private
ATTRIBUTES = [
:item_count,
:item_names_size_bytes,
:attribute_name_count,
:attribute_names_size_bytes,
:attribute_value_count,
:attribute_values_size_bytes,
:timestamp,
]
# @param [Domain] domain The domain to fetch metadata for.
# @return [DomainMetadata]
def initialize domain, options = {}
@domain = domain
super
end
# @return [Domain] The domain this metadata is describing.
attr_reader :domain
# @return [Integer] The number of all items in the {#domain}.
def item_count
self.to_h[:item_count]
end
# @return [Integer] The total size of all item names in the {#domain},
# in bytes.
def item_names_size_bytes
self.to_h[:item_names_size_bytes]
end
# @return [Integer] The number of unique attribute names in the
# {#domain}.
def attribute_name_count
self.to_h[:attribute_name_count]
end
# @return [Integer] The total size of all unique attribute names,
# in bytes.
def attribute_names_size_bytes
self.to_h[:attribute_names_size_bytes]
end
# @return [Integer] The number of all attribute name/value pairs in
# the {#domain}.
def attribute_value_count
self.to_h[:attribute_value_count]
end
# @return [Integer] The total size of all attribute values, in bytes.
def attribute_values_size_bytes
self.to_h[:attribute_values_size_bytes]
end
# @return [Integer] The data and time when metadata was calculated
# in Epoch (UNIX) time.
def timestamp
self.to_h[:timestamp]
end
# @return [Hash] A hash of all of the metadata attributes for
# this {#domain}.
def to_h
meta = client.domain_metadata(:domain_name => domain.name)
ATTRIBUTES.inject({}) {|h,attr| h[attr] = meta.send(attr); h }
end
end
end
end
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