74 lines
1.9 KiB
Ruby
74 lines
1.9 KiB
Ruby
require 'tempfile'
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require 'securerandom'
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class StackTemplateBase < MongoModel
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attr_accessor :id, :template_url, :template_json, :provider
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# Few words about template_url:
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# In Amazon Cloudformation the template file must be stored on an Amazon S3 bucket,
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# but for Openstack stacks it isn't neccessary (your may use local file).
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# I decided to enforce template_url strategy using in openstack to reach more common
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# interface between different providers' stack templates.
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types id: {type: String, empty: false},
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provider: {type: String, empty: false},
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template_json: {type: String, empty: false},
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template_url: {type: String, empty: false}
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def initialize(attrs)
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self.id = attrs['id']
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self.template_json = attrs['template_json'].to_s
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self.template_url = attrs['template_url']
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self.provider = attrs['provider']
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self
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end
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def to_hash_without_id
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{
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provider: provider,
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template_json: template_json,
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template_url: template_url
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}
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end
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# do not forget to destroy template files on template destroying
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def delete_template_file_from_storage
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raise 'Override me'
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end
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# attrs should include:
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# - id (String)
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# - provider (String)
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# - template_json (String)
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def self.create(attrs)
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json = attrs['template_json']
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attrs['template_url'] = generate_template_file_and_upload_to_storage(attrs['id'], json)
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new(attrs)
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end
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def self.build_from_bson(attrs)
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attrs['id'] = attrs["_id"]
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self.new(attrs)
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end
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class << self
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private
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def generate_template_file_and_upload_to_storage(id, json)
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tempfile = Tempfile.new('foo')
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tempfile.write(json)
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secure_filename = "#{id}-#{SecureRandom.hex}.template"
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upload_file_to_storage(secure_filename, tempfile.path)
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ensure
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tempfile.close
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tempfile.unlink
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end
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def upload_file_to_storage(filename, file_path)
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raise 'Override me'
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end
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end
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end
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