Agent filters are always present no matter what, so we cant raise an error if the capabilities suggest the discovery method cant do agents we just have to rely on the discovery plugin to not do stupid things in the presense of a agent filter
# File lib/mcollective/discovery.rb, line 62 def check_capabilities(filter) capabilities = ddl.discovery_interface[:capabilities] unless capabilities.include?(:classes) raise "Cannot use class filters while using the '%s' discovery method" % discovery_method unless filter["cf_class"].empty? end unless capabilities.include?(:facts) raise "Cannot use fact filters while using the '%s' discovery method" % discovery_method unless filter["fact"].empty? end unless capabilities.include?(:identity) raise "Cannot use identity filters while using the '%s' discovery method" % discovery_method unless filter["identity"].empty? end unless capabilities.include?(:compound) raise "Cannot use compound filters while using the '%s' discovery method" % discovery_method unless filter["compound"].empty? end end
# File lib/mcollective/discovery.rb, line 47 def ddl @ddl ||= DDL.new(discovery_method, :discovery) # if the discovery method got changed we might have an old DDL cached # this will detect that and reread the correct DDL from disk unless @ddl.meta[:name] == discovery_method @ddl = DDL.new(discovery_method, :discovery) end return @ddl end
# File lib/mcollective/discovery.rb, line 96 def discover(filter, timeout, limit) raise "Limit has to be an integer" unless limit.is_a?(Fixnum) if force_discovery_method_by_filter(filter) timeout = ddl.meta[:timeout] + @client.timeout_for_compound_filter(filter["compound"]) else timeout = ddl.meta[:timeout] unless timeout end check_capabilities(filter) discovered = discovery_class.discover(filter, timeout, limit, @client) if limit > 0 return discovered[0,limit] else return discovered end end
# File lib/mcollective/discovery.rb, line 39 def discovery_class method = discovery_method.capitalize PluginManager.loadclass("MCollective::Discovery::#{method}") unless self.class.const_defined?(method) self.class.const_get(method) end
# File lib/mcollective/discovery.rb, line 21 def discovery_method method = "mc" if @client.options[:discovery_method] method = @client.options[:discovery_method] else method = @default_method end raise "Unknown discovery method %s" % method unless has_method?(method) unless method == "mc" raise "Custom discovery methods require direct addressing mode" unless Config.instance.direct_addressing end return method end
# File lib/mcollective/discovery.rb, line 9 def find_known_methods PluginManager.find("discovery") end
# File lib/mcollective/discovery.rb, line 17 def force_direct_mode? discovery_method != "mc" end
checks if compound filters are used and then forces the ‘mc’ discovery plugin
# File lib/mcollective/discovery.rb, line 83 def force_discovery_method_by_filter(filter) unless discovery_method == "mc" unless filter["compound"].empty? Log.info "Switching to mc discovery method because compound filters are used" @client.options[:discovery_method] = "mc" return true end end return false end
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