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module Oxidized
require 'oxidized/node'
require 'ipaddr'
class Oxidized::NotSupported < OxidizedError; end
class Oxidized::NodeNotFound < OxidizedError; end
class Nodes < Array
attr_accessor :source
alias :put :unshift
def load node_want=nil
with_lock do
new = []
node_want_ip = (IPAddr.new(node_want) rescue false) if node_want
@source = CFG.source.default
Oxidized.mgr.add_source @source
Oxidized.mgr.source[@source].new.load.each do |node|
# we want to load specific node(s), not all of them
if node_want
next unless node_want_ip == node[:ip] or node_want.match(node[:name])
end
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]
rescue Resolv::ResolvError => err
Log.error "node %s is not resolvable, raised %s with message '%s'" % [node, err.class, err.message]
end
end
size == 0 ? replace(new) : update_nodes(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={}
if waiting.find_node_index(node)
with_lock do
n = del node
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
# @param node node whose index number in Nodes to find
# @return [Fixnum] index number of node in Nodes
def find_node_index node
find_index node or raise Oxidized::NodeNotFound, "unable to find '#{node}'"
end
private
def initialize opts={}
super()
node = opts.delete :node
@mutex= Mutex.new # we compete for the nodes with webapi thread
if nodes = opts.delete(:nodes)
replace nodes
else
load node
end
end
def with_lock &block
@mutex.synchronize(&block)
end
def find_index node
index { |e| e.name == node }
end
# @param node node which is removed from nodes list
# @return [Node] deleted node
def del node
delete_at find_node_index(node)
end
# @return [Nodes] list of nodes running now
def running
Nodes.new :nodes => select { |node| node.running? }
end
# @return [Nodes] list of nodes waiting (not running)
def waiting
Nodes.new :nodes => select { |node| not node.running? }
end
# walks list of new nodes, if old node contains same name, adds last and
# stats information from old to new.
#
# @todo can we trust name to be unique identifier, what about when groups are used?
# @param [Array] nodes Array of nodes used to replace+update old
def update_nodes nodes
old = self.dup
replace(nodes)
each do |node|
begin
if i = old.find_node_index(node.name)
node.stats = old[i].stats
node.last = old[i].last
end
rescue Oxidized::NodeNotFound
end
end
end
end
end
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