Class: Mccloud::Definition

Inherits:
Object
  • Object
show all
Defined in:
lib/mccloud/definition.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, env) ⇒ Definition

Returns a new instance of Definition.



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# File 'lib/mccloud/definition.rb', line 9

def initialize(name,env)
  @name=name
  @env=env
  @type="vm"
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(m, *args, &block) ⇒ Object 



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# File 'lib/mccloud/definition.rb', line 20

def method_missing(m, *args, &block)
  #puts  "There's no method called #{m} here -- please try again."
  @raw.send(m,*args)
end

Instance Attribute Details

#env ⇒ Object (readonly)

Returns the value of attribute env.



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# File 'lib/mccloud/definition.rb', line 6

def env
  @env
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/mccloud/definition.rb', line 5

def name
  @name
end

#provider ⇒ Object

Returns the value of attribute provider.



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# File 'lib/mccloud/definition.rb', line 7

def provider
  @provider
end

Instance Method Details

#copy_template(templatename) ⇒ Object

Raises:



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# File 'lib/mccloud/definition.rb', line 66

def copy_template(templatename)
  raise ::Mccloud::Error, "Definition #{@name} already exists" if self.exists?
  raise ::Mccloud::Error, "Template #{templatename} does not exist" unless @env.config.templates[templatename].exists?

  begin
    t=@env.config.templates[templatename]
    @env.logger.info "Copying template #{t.path} to definition #{self.path}"
    FileUtils.cp_r(t.path,self.path)
    save_mccloud_rb
    FileUtils.rm(File.join(self.path,"mccloud.erb"))
  rescue Exception => ex
    raise ::Mccloud::Error, "Error copying template #{templatename} to definition #{@name}:\n#{ex}"
  end

end

#definition_path ⇒ Object 



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# File 'lib/mccloud/definition.rb', line 37

def definition_path
  File.join(self.path,"mccloud.rb")
end

#exists? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mccloud/definition.rb', line 29

def exists?
  File.directory?(self.path)
end

#load! ⇒ Object 



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# File 'lib/mccloud/definition.rb', line 41

def load!
  self.validate

  content=File.read(self.definition_path)
  mccloud_configurator=env.config
  content.gsub!("Mccloud::Config.run","mccloud_configurator.define")

  begin
    env.config.instance_eval(content)
  rescue Error => ex
    raise ::Mccloud::Error, "Error reading definition from file #{definition_file}#{ex}"
  end
end

#path ⇒ Object 



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# File 'lib/mccloud/definition.rb', line 33

def path
  File.join(@env.config.mccloud.definition_path,@name)
end

#save_mccloud_rb ⇒ Object 



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# File 'lib/mccloud/definition.rb', line 82

def save_mccloud_rb
  begin
    unless File.exists?(self.definition_path)
      File.open(self.definition_path,'w'){ |f| f.write(self.to_template(@name))}
    else
      raise ::Mccloud::Error, "Definition file #{self.definition_path} already exists"
    end
  rescue Error => ex
    raise ::Mccloud::Error, "Error writing mccloud.rb"
  end
end

#to_template(templatename) ⇒ Object 



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# File 'lib/mccloud/definition.rb', line 94

def to_template(templatename)
  result=""
  t=@env.config.templates[templatename]
  filename=File.join(self.path,'mccloud.erb')
  env.logger.info "Opening vm template file #{@file}"
  template=File.new(filename).read
  result=ERB.new(template).result(binding)
  return result
end

#to_vm(name) ⇒ Object 



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# File 'lib/mccloud/definition.rb', line 55

def to_vm(name)
  vm=@raw.dup
  vm.name=name
  return vm
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mccloud/definition.rb', line 25

def valid?
  File.exists?(self.definition_path)
end

#validate ⇒ Object

Raises:



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# File 'lib/mccloud/definition.rb', line 61

def validate
  raise ::Mccloud::Error, "Definition #{@name} does not yet exist" unless self.exists?
end