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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 EMR
# @attr_reader [String] market
#
# @attr_reader [String] instance_role
#
# @attr_reader [String,nil] bid_price
#
# @attr_reader [String] instance_type
#
# @attr_reader [String] instance_request_count
#
# @attr_reader [String] instance_running_count
#
# @attr_reader [String] state
#
# @attr_reader [String] last_state_change_reason
#
# @attr_reader [Time] created_at
#
# @attr_reader [Time] started_at
#
# @attr_reader [Time] ready_at
#
# @attr_reader [Time] ended_at
#
class InstanceGroup < Core::Resource
# @api private
def initialize job_flow, instance_group_id, options = {}
@job_flow = job_flow
@instance_group_id = instance_group_id
super
end
# @return [JobFlow]
attr_reader :job_flow
# @return [String]
attr_reader :instance_group_id
alias_method :id, :instance_group_id
# @attr_reader [String] name
attribute :name, :static => true
attribute :market, :static => true
attribute :instance_role, :static => true
attribute :bid_price, :static => true
attribute :instance_type, :static => true
attribute :instance_request_count
attribute :instance_running_count
attribute :state
attribute :last_state_change_reason
attribute :creation_date_time, :static => true, :alias => :created_at
attribute :start_date_time, :alias => :started_at
attribute :ready_date_time, :alias => :ready_at
attribute :end_date_time, :alias => :ended_at
populates_from(:describe_job_flows) do |resp|
find_in_response(resp)
end
# Modifies the target size of this instance group.
# @param [Integer] count
# @return (see #modify)
def set_instance_count count
modify(:instance_count => count)
end
# @param [Hash] options
# @option options [Integer] :count The new target size for the
# instance group.
# @return [nil]
def modify options = {}
options[:instance_group_id] = instance_group_id
options[:instance_count] = options.delete(:count) if options[:count]
client.modify_instance_groups(:instance_groups => [options])
nil
end
# @return [Boolean] Returns `true` if the instance group exists.
def exists?
!!find_in_response(get_resource)
end
protected
def resource_identifiers
[[:job_flow_id, job_flow.id], [:instance_group_id, id]]
end
def get_resource attr = nil
client.describe_job_flows(:job_flow_ids => [job_flow.id])
end
def find_in_response resp
data = nil
resp.data[:job_flows].each do |job|
if job[:job_flow_id] == job_flow.job_flow_id
job[:instances][:instance_groups].each do |ig|
if ig[:instance_group_id] == instance_group_id
data = ig
end
end
end
end
data
end
end
end
end
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