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# An actual indirection.
class Puppet::Indirector::Indirection
@@indirections = []
# Clear all cached termini from all indirections.
def self.clear_cache
@@indirections.each { |ind| ind.clear_cache }
end
attr_accessor :name, :termini
attr_reader :to
# Clear our cached list of termini.
# This is only used for testing.
def clear_cache
@termini.clear
end
# This is only used for testing.
def delete
@@indirections.delete(self) if @@indirections.include?(self)
end
def initialize(name, options = {})
@name = name
options.each do |name, value|
begin
send(name.to_s + "=", value)
rescue NoMethodError
raise ArgumentError, "%s is not a valid Indirection parameter" % name
end
end
@termini = {}
@@indirections << self
end
# Return the singleton terminus for this indirection.
def terminus(name = nil)
# Get the name of the terminus.
unless name
unless param_name = self.to
raise ArgumentError, "You must specify an indirection terminus for indirection %s" % self.name
end
name = Puppet[param_name]
name = name.intern if name.is_a?(String)
end
unless @termini[name]
@termini[name] = make_terminus(name)
end
@termini[name]
end
# Validate the parameter. This requires that indirecting
# classes require 'puppet/defaults', because of ordering issues,
# but it makes problems much easier to debug.
def to=(param_name)
unless Puppet.config.valid?(param_name)
raise ArgumentError, "Configuration parameter '%s' for indirection '%s' does not exist'" % [param_name, self.name]
end
@to = param_name
end
private
# Create a new terminus instance.
def make_terminus(name)
# Load our terminus class.
unless klass = Puppet::Indirector.terminus(self.name, name)
raise ArgumentError, "Could not find terminus %s for indirection %s" % [name, self.name]
end
return klass.new
end
end
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