Class: Convection::Model::Template

Inherits:
Object
  • Object
show all
Includes:
DSL::IntrinsicFunctions, DSL::Template
Defined in:
lib/convection/model/template.rb,
lib/convection/model/template/output.rb,
lib/convection/model/template/mapping.rb,
lib/convection/model/template/metadata.rb,
lib/convection/model/template/resource.rb,
lib/convection/model/template/condition.rb,
lib/convection/model/template/parameter.rb,
lib/convection/model/template/resource/aws_elb.rb,
lib/convection/model/template/resource_property.rb,
lib/convection/model/template/resource_attribute.rb,
lib/convection/model/template/resource_collection.rb,
lib/convection/model/template/resource/aws_ec2_eip.rb,
lib/convection/model/template/resource/aws_ec2_vpc.rb,
lib/convection/model/template/resource/aws_kms_key.rb,
lib/convection/model/template/resource/aws_iam_role.rb,
lib/convection/model/template/resource/aws_iam_user.rb,
lib/convection/model/template/resource/aws_ec2_route.rb,
lib/convection/model/template/resource/aws_iam_group.rb,
lib/convection/model/template/resource/aws_s3_bucket.rb,
lib/convection/model/template/resource/aws_sns_topic.rb,
lib/convection/model/template/resource/aws_sqs_queue.rb,
lib/convection/model/template/resource/aws_ec2_subnet.rb,
lib/convection/model/template/resource/aws_ec2_volume.rb,
lib/convection/model/template/resource/aws_iam_policy.rb,
lib/convection/model/template/resource/aws_events_rule.rb,
lib/convection/model/template/resource/aws_ec2_instance.rb,
lib/convection/model/template/resource/aws_lambda_alias.rb,
lib/convection/model/template/resource/aws_logs_loggroup.rb,
lib/convection/model/template/resource/aws_dynamodb_table.rb,
lib/convection/model/template/resource/aws_ec2_spot_fleet.rb,
lib/convection/model/template/resource/aws_ecr_repository.rb,
lib/convection/model/template/resource/aws_elbv2_listener.rb,
lib/convection/model/template/resource/aws_iam_access_key.rb,
lib/convection/model/template/resource/aws_lambda_version.rb,
lib/convection/model/template/resource/aws_rds_db_cluster.rb,
lib/convection/model/template/resource/aws_ec2_nat_gateway.rb,
lib/convection/model/template/resource/aws_ec2_network_acl.rb,
lib/convection/model/template/resource/aws_ec2_route_table.rb,
lib/convection/model/template/resource/aws_ec2_vpn_gateway.rb,
lib/convection/model/template/resource/aws_efs_file_system.rb,
lib/convection/model/template/resource/aws_lambda_function.rb,
lib/convection/model/template/resource/aws_rds_db_instance.rb,
lib/convection/model/template/resource/aws_ec2_dhcp_options.rb,
lib/convection/model/template/resource/aws_ec2_vpc_endpoint.rb,
lib/convection/model/template/resource/aws_efs_mount_target.rb,
lib/convection/model/template/resource/aws_s3_bucket_policy.rb,
lib/convection/model/template/resource/aws_sns_subscription.rb,
lib/convection/model/template/resource/aws_sns_topic_policy.rb,
lib/convection/model/template/resource/aws_sqs_queue_policy.rb,
lib/convection/model/template/resource/aws_api_gateway_model.rb,
lib/convection/model/template/resource/aws_api_gateway_stage.rb,
lib/convection/model/template/resource/aws_cloud_watch_alarm.rb,
lib/convection/model/template/resource/aws_lambda_permission.rb,
lib/convection/model/template/resource/aws_route53_recordset.rb,
lib/convection/model/template/resource/aws_api_gateway_method.rb,
lib/convection/model/template/resource/aws_ec2_security_group.rb,
lib/convection/model/template/resource/aws_ec2_vpn_connection.rb,
lib/convection/model/template/resource/aws_elbv2_target_group.rb,
lib/convection/model/template/resource/aws_iam_managed_policy.rb,
lib/convection/model/template/resource/aws_api_gateway_account.rb,
lib/convection/model/template/resource/aws_api_gateway_api_key.rb,
lib/convection/model/template/resource/aws_ec2_eip_association.rb,
lib/convection/model/template/resource/aws_elasticache_cluster.rb,
lib/convection/model/template/resource/aws_elbv2_listener_rule.rb,
lib/convection/model/template/resource/aws_elbv2_load_balancer.rb,
lib/convection/model/template/resource/aws_rds_db_subnet_group.rb,
lib/convection/model/template/resource/aws_route53_hosted_zone.rb,
lib/convection/model/template/resource_attribute/update_policy.rb,
lib/convection/model/template/resource/aws_api_gateway_resource.rb,
lib/convection/model/template/resource/aws_api_gateway_rest_api.rb,
lib/convection/model/template/resource/aws_ec2_customer_gateway.rb,
lib/convection/model/template/resource/aws_ec2_internet_gateway.rb,
lib/convection/model/template/resource/aws_elasticsearch_domain.rb,
lib/convection/model/template/resource/aws_iam_instance_profile.rb,
lib/convection/model/template/resource/aws_route53_health_check.rb,
lib/convection/model/template/resource/aws_ec2_network_acl_entry.rb,
lib/convection/model/template/resource/aws_rds_db_security_group.rb,
lib/convection/model/template/resource/aws_api_gateway_authorizer.rb,
lib/convection/model/template/resource/aws_api_gateway_deployment.rb,
lib/convection/model/template/resource/aws_api_gateway_usage_plan.rb,
lib/convection/model/template/resource/aws_rds_db_parameter_group.rb,
lib/convection/model/template/resource/aws_rds_event_subscription.rb,
lib/convection/model/template/resource/aws_cloudfront_distribution.rb,
lib/convection/model/template/resource/aws_ec2_vpn_connection_route.rb,
lib/convection/model/template/resource/aws_elasticache_subnet_group.rb,
lib/convection/model/template/resource/aws_logs_subscription_filter.rb,
lib/convection/model/template/resource_property/aws_ec2_mount_point.rb,
lib/convection/model/template/resource/aws_ec2_security_group_ingres.rb,
lib/convection/model/template/resource/aws_api_gateway_usage_plan_key.rb,
lib/convection/model/template/resource/aws_ec2_vpc_gateway_attachment.rb,
lib/convection/model/template/resource/aws_ec2_vpc_peering_connection.rb,
lib/convection/model/template/resource/aws_elasticache_security_group.rb,
lib/convection/model/template/resource_property/aws_cloudfront_origin.rb,
lib/convection/model/template/resource_property/aws_lambda_vpc_config.rb,
lib/convection/model/template/resource/aws_auto_scaling_scaling_policy.rb,
lib/convection/model/template/resource/aws_directory_service_simple_ad.rb,
lib/convection/model/template/resource/aws_elasticache_parameter_group.rb,
lib/convection/model/template/resource_property/aws_cloudfront_logging.rb,
lib/convection/model/template/resource_property/aws_events_rule_target.rb,
lib/convection/model/template/resource_property/aws_lambda_environment.rb,
lib/convection/model/template/resource/aws_elasticbeanstalk_application.rb,
lib/convection/model/template/resource/aws_elasticbeanstalk_environment.rb,
lib/convection/model/template/resource/aws_rds_db_clusterparametergroup.rb,
lib/convection/model/template/resource_property/aws_cloudfront_s3origin.rb,
lib/convection/model/template/resource_property/aws_route53_geolocation.rb,
lib/convection/model/template/resource/aws_api_gateway_base_path_mapping.rb,
lib/convection/model/template/resource/aws_auto_scaling_scheduled_action.rb,
lib/convection/model/template/resource/aws_elasticache_replication_group.rb,
lib/convection/model/template/resource_property/aws_lambda_function_code.rb,
lib/convection/model/template/resource_property/aws_route53_alias_target.rb,
lib/convection/model/template/resource/aws_api_gateway_client_certificate.rb,
lib/convection/model/template/resource_property/aws_ec2_network_interface.rb,
lib/convection/model/template/resource_property/aws_s3_cors_configuration.rb,
lib/convection/model/template/resource/aws_auto_scaling_auto_scaling_group.rb,
lib/convection/model/template/resource/aws_certificate_manager_certificate.rb,
lib/convection/model/template/resource_property/aws_cloudfront_customorigin.rb,
lib/convection/model/template/resource_property/aws_cloudfront_restrictions.rb,
lib/convection/model/template/resource/aws_auto_scaling_launch_configuration.rb,
lib/convection/model/template/resource/aws_ec2_vpn_gateway_route_propagation.rb,
lib/convection/model/template/resource_property/aws_cloudfront_cachebehavior.rb,
lib/convection/model/template/resource_property/aws_ec2_block_device_mapping.rb,
lib/convection/model/template/resource_property/aws_ec2_iam_instance_profile.rb,
lib/convection/model/template/resource_property/aws_s3_website_configuration.rb,
lib/convection/model/template/resource/aws_ec2_subnet_network_acl_association.rb,
lib/convection/model/template/resource/aws_ec2_subnet_route_table_association.rb,
lib/convection/model/template/resource/aws_elasticache_security_group_ingress.rb,
lib/convection/model/template/resource_property/aws_cloudfront_georestriction.rb,
lib/convection/model/template/resource/aws_elasticbeanstalk_applicationversion.rb,
lib/convection/model/template/resource_property/aws_cloudfront_forwardedvalues.rb,
lib/convection/model/template/resource_property/aws_elbv2_listener_rule_action.rb,
lib/convection/model/template/resource_property/aws_elbv2_target_group_matcher.rb,
lib/convection/model/template/resource_property/aws_s3_cors_configuration_rule.rb,
lib/convection/model/template/resource_property/aws_elbv2_listener_certificates.rb,
lib/convection/model/template/resource_property/aws_cloudfront_viewercertificate.rb,
lib/convection/model/template/resource_property/aws_ec2_block_store_block_device.rb,
lib/convection/model/template/resource_property/aws_elbv2_target_group_attribute.rb,
lib/convection/model/template/resource_property/aws_s3_replication_configuration.rb,
lib/convection/model/template/resource/aws_elasticbeanstalk_configurationtemplate.rb,
lib/convection/model/template/resource_property/aws_api_gateway_api_key_stage_key.rb,
lib/convection/model/template/resource_property/aws_elbv2_listener_default_action.rb,
lib/convection/model/template/resource_property/aws_elbv2_listener_rule_condition.rb,
lib/convection/model/template/resource_property/aws_elbv2_load_balancer_attribute.rb,
lib/convection/model/template/resource_property/aws_api_gateway_method_integration.rb,
lib/convection/model/template/resource_property/aws_cloudfront_customerrorresponse.rb,
lib/convection/model/template/resource_property/aws_cloudfront_distribution_config.rb,
lib/convection/model/template/resource_property/aws_cloudfront_defaultcachebehavior.rb,
lib/convection/model/template/resource_property/aws_api_gateway_rest_api_s3_location.rb,
lib/convection/model/template/resource_property/aws_api_gateway_usage_plan_api_stage.rb,
lib/convection/model/template/resource_property/aws_elasticsearch_domain_ebs_options.rb,
lib/convection/model/template/resource_property/aws_elasticsearch_domain_vpc_options.rb,
lib/convection/model/template/resource_property/aws_s3_replication_configuration_rule.rb,
lib/convection/model/template/resource_property/aws_api_gateway_method_method_response.rb,
lib/convection/model/template/resource_property/aws_cloudfront_forwardedvalues_cookies.rb,
lib/convection/model/template/resource_property/aws_ec2_spot_fleet_request_config_data.rb,
lib/convection/model/template/resource_property/aws_lambda_function_dead_letter_config.rb,
lib/convection/model/template/resource_property/aws_api_gateway_usage_plan_quota_settings.rb,
lib/convection/model/template/resource_property/aws_elasticsearch_domain_advanced_options.rb,
lib/convection/model/template/resource_property/aws_elasticsearch_domain_snapshot_options.rb,
lib/convection/model/template/resource_property/aws_elbv2_target_group_target_description.rb,
lib/convection/model/template/resource_property/aws_s3_website_configuration_routing_rule.rb,
lib/convection/model/template/resource_property/aws_api_gateway_deployment_stage_description.rb,
lib/convection/model/template/resource_property/aws_api_gateway_usage_plan_throttle_settings.rb,
lib/convection/model/template/resource_property/aws_api_gateway_deployment_stage_method_setting.rb,
lib/convection/model/template/resource_property/aws_s3_replication_configuration_rule_destination.rb,
lib/convection/model/template/resource_property/aws_elasticsearch_domain_elasticsearch_cluster_config.rb,
lib/convection/model/template/resource_property/aws_s3_website_configuration_redirect_all_requests_to.rb,
lib/convection/model/template/resource_property/aws_api_gateway_method_integration_integration_response.rb,
lib/convection/model/template/resource_property/aws_s3_website_configuration_routing_rule_redirect_rule.rb,
lib/convection/model/template/resource_property/aws_elasticache_replication_group_node_group_configuration.rb,
lib/convection/model/template/resource_property/aws_api_gateway_deployment_stage_description_method_setting.rb,
lib/convection/model/template/resource_property/aws_certificate_manager_certificate_domain_validation_option.rb,
lib/convection/model/template/resource_property/aws_ec2_spot_fleet_request_config_data_launch_specifications.rb,
lib/convection/model/template/resource_property/aws_s3_website_configuration_routing_rule_routing_rule_condition.rb,
lib/convection/model/template/resource_property/aws_ec2_spot_fleet_request_config_data_launch_specifications_security_groups.rb,
lib/convection/model/template/resource_property/aws_ec2_spot_fleet_request_config_data_launch_specifications_network_interface.rb,
lib/convection/model/template/resource_property/aws_ec2_spot_fleet_request_config_data_launch_specifications_block_device_mapping.rb,
lib/convection/model/template/resource_property/aws_ec2_spot_fleet_request_config_data_launch_specifications_block_device_mapping_ebs.rb

Overview

Template container class

Defined Under Namespace

Classes: Condition, Mapping, Metadata, Output, Parameter, Resource, ResourceAttribute, ResourceCollection, ResourceProperty

Constant Summary collapse

DEFAULT_VERSION = 
'2010-09-09'.freeze

Constants included from DSL::Template

DSL::Template::CF_MAX_BYTESIZE, DSL::Template::CF_MAX_DESCRIPTION_BYTESIZE, DSL::Template::CF_MAX_MAPPINGS, DSL::Template::CF_MAX_MAPPING_ATTRIBUTES, DSL::Template::CF_MAX_MAPPING_ATTRIBUTE_NAME, DSL::Template::CF_MAX_MAPPING_NAME, DSL::Template::CF_MAX_OUTPUTS, DSL::Template::CF_MAX_OUTPUT_NAME_CHARACTERS, DSL::Template::CF_MAX_PARAMETERS, DSL::Template::CF_MAX_PARAMETER_NAME_CHARACTERS, DSL::Template::CF_MAX_PARAMETER_VALUE_BYTESIZE, DSL::Template::CF_MAX_RESOURCES, DSL::Template::CF_MAX_RESOURCE_NAME

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from DSL::Template

#condition, #logs_log_group, #mapping, #metadata, #output, #parameter, #resource

Methods included from DSL::Template::Resource

#_terraform_module_dir_to_flag, #_terraform_module_flag_to_dir, attach_resource, attach_resource_collection, resource_collection_dsl_methods, resource_dsl_methods

Methods included from DSL::Helpers

#camel_case, included, method_name, #screaming_snake_case, #snake_case

Methods included from DSL::IntrinsicFunctions

#base64, #find_in_map, #fn_and, #fn_equals, #fn_if, #fn_import_value, #fn_not, #fn_or, #fn_ref, #fn_sub, #get_att, #get_azs, included, #join, mixers, #select

Constructor Details

#initialize(stack = nil, &block) ⇒ Template

Returns a new instance of Template.



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# File 'lib/convection/model/template.rb', line 239

def initialize(stack = nil, &block)
  @definition = block

  @stack = stack
  @attribute_mappings = {}

  @version = DEFAULT_VERSION
  @description = ''

  @parameters = Collection.new
  @mappings = Collection.new
  @conditions = Collection.new
  @resources = Collection.new
  @resource_collections = Collection.new
  @outputs = Collection.new
  @metadata = Collection.new
end

Instance Attribute Details

#attribute_mappings ⇒ Object (readonly)

Returns the value of attribute attribute_mappings.



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# File 'lib/convection/model/template.rb', line 226

def attribute_mappings
  @attribute_mappings
end

#conditions ⇒ Object (readonly)

Returns the value of attribute conditions.



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# File 'lib/convection/model/template.rb', line 230

def conditions
  @conditions
end

#mappings ⇒ Object (readonly)

Returns the value of attribute mappings.



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# File 'lib/convection/model/template.rb', line 229

def mappings
  @mappings
end

#outputs ⇒ Object (readonly)

Returns the value of attribute outputs.



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# File 'lib/convection/model/template.rb', line 233

def outputs
  @outputs
end

#parameters ⇒ Object (readonly)

Returns the value of attribute parameters.



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# File 'lib/convection/model/template.rb', line 228

def parameters
  @parameters
end

#resource_collections ⇒ Object (readonly)

Returns the value of attribute resource_collections.



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# File 'lib/convection/model/template.rb', line 231

def resource_collections
  @resource_collections
end

#resources ⇒ Object (readonly)

Returns the value of attribute resources.



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# File 'lib/convection/model/template.rb', line 232

def resources
  @resources
end

#stack ⇒ Object (readonly)

Returns the value of attribute stack.



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# File 'lib/convection/model/template.rb', line 225

def stack
  @stack
end

Instance Method Details

#all_resources ⇒ Object 



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# File 'lib/convection/model/template.rb', line 293

def all_resources
  resource_collections.reduce(resources) do |result, (_name, resource_collection)|
    result.merge(resource_collection.resources)
  end
end

#clone(stack_) ⇒ Object 



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# File 'lib/convection/model/template.rb', line 257

def clone(stack_)
  Template.new(stack_, &@definition)
end

#diff(other, stack_ = nil, retain: false) ⇒ Object 



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# File 'lib/convection/model/template.rb', line 299

def diff(other, stack_ = nil, retain: false)
  # We want to accurately show when the DeletionPolicy is getting deleted and also when resources are going to be retained.
  # Sample DeletionPolicy Removal output
  # us-east-1      compare  Compare local state of stack test-logs-deletion with remote template
  # us-east-1       delete  Resources.sgtestConvectionDeletion.DeletionPolicy
  #
  # Sample Mixed Retain/Delete Resources
  # us-east-1       retain  Resources.ELBLoggingPolicy.DependsOn.AWS::S3::BucketPolicy.0
  # us-east-1       retain  Resources.ELBLoggingPolicy.DeletionPolicy
  # us-east-1       delete  Resources.sgtestConvectionDeletion.Type
  # us-east-1       delete  Resources.sgtestConvectionDeletion.Properties.AWS::EC2::SecurityGroup.GroupDescription
  # us-east-1       delete  Resources.sgtestConvectionDeletion.Properties.AWS::EC2::SecurityGroup.VpcId
  #
  events = render(stack_, retain: retain).diff(other).map { |diff| Diff.new(diff[0], *diff[1]) }

  # Top level events (changes to the resource directly) have keys with a format "Resources.{NAME}.{KEY}".
  # So we can count the number of separators to find them.
  top_level_events = events.select { |event| event.key.count('.') <= 2 }

  # We know something's a deleted resource when it has a top level "Type" attribute.
  type_suffix = '.Type'.freeze
  deleted_resources = top_level_events.select do |event|
    event.action == :delete && event.key.end_with?(type_suffix)
  end
  deleted_resources.map! { |event| event.key[0...-type_suffix.length] }

  # We know something's a retainable resource when it has a top level "DeletionPolicy" attribute.
  delete_policy_suffix = '.DeletionPolicy'.freeze
  retainable_resources = top_level_events.select do |event|
    event.action == :delete && event.key.end_with?(delete_policy_suffix) && event.theirs == 'Retain'
  end
  retainable_resources.map! { |event| event.key[0...-delete_policy_suffix.length] }
  retainable_resources.keep_if { |name| deleted_resources.include?(name) }

  events.each do |event|
    retained = retainable_resources.any? { |name| event.action == :delete && event.key.start_with?(name) }
    event.action = :retain if retained
  end

  events
end

#execute ⇒ Object 



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# File 'lib/convection/model/template.rb', line 261

def execute
  instance_exec(&@definition)

  resource_collections.each do |_, group|
    group.run_definition
    group.execute
  end
end

#render(stack_ = nil, retain: false) ⇒ Object 



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# File 'lib/convection/model/template.rb', line 270

def render(stack_ = nil, retain: false)
  ## Instantiate a new template with the definition block and an other stack
  return clone(stack_).render unless stack_.nil?

  execute ## Process the template document

  {
    'AWSTemplateFormatVersion' => version,
    'Description' => description,
    'Parameters' => parameters.map(&:render),
    'Mappings' => mappings.map(&:render),
    'Conditions' => conditions.map(&:render),
    'Resources' => all_resources.map do |resource|
      if retain && resource.deletion_policy.nil?
        resource.deletion_policy('Retain')
      end
      resource.render
    end,
    'Outputs' => outputs.map(&:render),
    'Metadata' => metadata.map(&:render)
  }
end

#template ⇒ Object 



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# File 'lib/convection/model/template.rb', line 235

def template
  self
end

#to_json(stack_ = nil, pretty = false, retain: false) ⇒ Object 



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# File 'lib/convection/model/template.rb', line 341

def to_json(stack_ = nil, pretty = false, retain: false)
  rendered_stack = render(stack_, retain: retain)
  validate(rendered_stack)
  return JSON.generate(rendered_stack) unless pretty
  JSON.pretty_generate(rendered_stack)
end

#validate(rendered_stack = nil) ⇒ Object 



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# File 'lib/convection/model/template.rb', line 348

def validate(rendered_stack = nil)
  %w(resources mappings parameters outputs description bytesize).map do |method|
    send("validate_#{method}", rendered_stack)
  end
end

#validate_bytesize(rendered_stack) ⇒ Object 



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# File 'lib/convection/model/template.rb', line 437

def validate_bytesize(rendered_stack)
  json = JSON.generate(rendered_stack)
  validate_compare(json.bytesize,
                   CF_MAX_BYTESIZE,
                   ExcessiveTemplateSizeError)
end

#validate_compare(value, cf_max, error) ⇒ Object 



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# File 'lib/convection/model/template.rb', line 354

def validate_compare(value, cf_max, error)
  limit_exceeded_error(value, cf_max, error) if value > cf_max
end

#validate_description(rendered_stack) ⇒ Object 



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# File 'lib/convection/model/template.rb', line 431

def validate_description(rendered_stack)
  validate_compare(rendered_stack['Description'].bytesize,
                   CF_MAX_DESCRIPTION_BYTESIZE,
                   ExcessiveDescriptionError)
end

#validate_mappings(rendered_stack) ⇒ Object 



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# File 'lib/convection/model/template.rb', line 369

def validate_mappings(rendered_stack)
  mappings = rendered_stack ['Mappings']
  validate_compare(mappings.count,
                   CF_MAX_MAPPINGS,
                   ExcessiveMappingsError)
  mappings.each do |_, value|
    validate_compare(
      value.count,
      CF_MAX_MAPPING_ATTRIBUTES,
      ExcessiveMappingAttributesError
    )
  end

  mappings.keys.each do |key|
    validate_compare(key.length,
                     CF_MAX_MAPPING_NAME,
                     ExcessiveMappingNameError)
  end

  ## XXX What are we trying to do here @aburke
  mapping_attributes = mappings.values.flat_map do |inner_hash|
    inner_hash.keys.select do |key|
      value = inner_hash[key]
    end
  end

  mapping_attributes.each do |attribute|
    validate_compare(attribute.length,
                     CF_MAX_MAPPING_ATTRIBUTE_NAME,
                     ExcessiveMappingAttributeNameError)
  end
end

#validate_outputs(rendered_stack) ⇒ Object 



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# File 'lib/convection/model/template.rb', line 419

def validate_outputs(rendered_stack)
  outputs = rendered_stack['Outputs']
  validate_compare(outputs.count,
                   CF_MAX_OUTPUTS,
                   ExcessiveOutputsError)
  largest_output_name = outputs.keys.max
  largest_output_name ||= ''
  validate_compare(largest_output_name.length,
                   CF_MAX_OUTPUT_NAME_CHARACTERS,
                   ExcessiveOutputNameError)
end

#validate_parameters(rendered_stack) ⇒ Object 



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# File 'lib/convection/model/template.rb', line 402

def validate_parameters(rendered_stack)
  parameters = rendered_stack['Parameters']
  validate_compare(parameters.count,
                   CF_MAX_PARAMETERS,
                   ExcessiveParametersError)
  largest_parameter_name = parameters.keys.max
  largest_parameter_name ||= ''
  validate_compare(largest_parameter_name.length,
                   CF_MAX_PARAMETER_NAME_CHARACTERS,
                   ExcessiveParameterNameError)
  parameters.values.each do |value|
    validate_compare(JSON.generate(value).bytesize,
                     CF_MAX_PARAMETER_VALUE_BYTESIZE,
                     ExcessiveParameterBytesizeError)
  end
end

#validate_resources(rendered_stack) ⇒ Object 



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# File 'lib/convection/model/template.rb', line 358

def validate_resources(rendered_stack)
  validate_compare(rendered_stack['Resources'].count,
                   CF_MAX_RESOURCES,
                   ExcessiveResourcesError)

  largest_resource_name = resources.keys.max || ''
  validate_compare(largest_resource_name.length,
                   CF_MAX_RESOURCE_NAME,
                   ExcessiveResourceNameError)
end