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Contents
module Vagrant
# Register components in a single location that can be queried.
#
# This allows certain components (such as guest systems, configuration
# pieces, etc.) to be registered and queried.
class Registry
def initialize
@actions = {}
@results_cache = {}
end
# Register a callable by key.
#
# The callable should be given in a block which will be lazily evaluated
# when the action is needed.
#
# If an action by the given name already exists then it will be
# overwritten.
def register(key, value=nil, &block)
block = lambda { value } if value
@actions[key] = block
end
# Get an action by the given key.
#
# This will evaluate the block given to `register` and return the resulting
# action stack.
def get(key)
return nil if !@actions.has_key?(key)
return @results_cache[key] if @results_cache.has_key?(key)
@results_cache[key] = @actions[key].call
end
alias :[] :get
# Iterate over the keyspace.
def each(&block)
@actions.each do |key, _|
yield key, get(key)
end
end
# Converts this registry to a hash
def to_hash
result = {}
self.each do |key, value|
result[key] = value
end
result
end
end
end
Version data entries
32 entries across 32 versions & 6 rubygems