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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 load
with_lock do
new = []
@source = CFG.source[:default]
Oxidized.mgr.add_source @source
Oxidized.mgr.source[@source].new.load.each do |node|
begin
_node = Node.new node
new.push _node
rescue ModelNotFound => err
Log.error "node %s raised %s with message %s" % [node, err.class, err.message]
end
end
replace new
end
end
def list
with_lock do
map { |e| e.serialize }
end
end
def show node
with_lock do
i = find_node_index node
self[i].serialize
end
end
def fetch node, group
with_lock do
i = find_node_index node
output = self[i].output.new
raise Oxidized::NotSupported unless output.respond_to? :fetch
output.fetch node, group
end
end
# @param node [String] name of the node moved into the head of array
def next node, opt={}
with_lock do
n = del node
if n
n.user = opt['user']
n.msg = opt['msg']
n.from = opt['from']
# set last job to nil so that the node is picked for immediate update
n.last = nil
put n
end
end
end
alias :top :next
# @return [String] node from the head of the array
def get
with_lock do
(self << shift).last
end
end
private
def initialize *args
super
@mutex= Mutex.new # we compete for the nodes with webapi thread
load if args.empty?
end
def with_lock &block
@mutex.synchronize(&block)
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
def del node
delete_at find_node_index(node)
end
end
end
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