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module Oxidized
require 'oxidized/node'
class Oxidized::NotSupported < StandardError; end
class Oxidized::NodeNotFound < StandardError; end
class Nodes < Array
attr_accessor :source
alias :put :unshift
def initialize *args
super
@mutex= Mutex.new # we compete for the nodes with webapi thread
load if args.empty?
end
def load
lock
new = []
@source = CFG.source[:default]
Oxidized.mgr.source = @source
Oxidized.mgr.source[@source].new.load.each do |node|
new.push Node.new node
end
unlock(replace new)
end
def list
lock
unlock(map { |e| e.serialize })
end
def show node
lock
i = find_node_index node
unlock(self[i].serialize)
end
def fetch node, group
lock
i = find_node_index node
output = self[i].output.new
unlock
raise Oxidized::NotSupported unless output.respond_to? :fetch
output.fetch node, group
end
def del node
lock
unlock(delete_at find_node_index(node))
end
# @param node [String] name of the node moved into the head of array
def next node, opt={}
lock
n = del node
if n
n.user = opt['user']
n.msg = opt['msg']
n.from = opt['from']
put n
end
unlock
end
alias :top :next
# @return [String] node from the head of the array
def get
lock
unlock((self << shift).last)
end
private
def lock
@mutex.lock unless @mutex.owned?
end
def unlock arg=nil
@mutex.unlock if @mutex.owned?
arg
end
def find_index node
index { |e| e.name == node }
end
def find_node_index node
find_index node or raise Oxidized::NodeNotFound, "unable to find '#{node}'"
end
end
end
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