Class: NewRelic::Agent::Configuration::Manager
- Inherits:
-
Object
- Object
- NewRelic::Agent::Configuration::Manager
- Extended by:
- Forwardable
- Defined in:
- lib/new_relic/agent/configuration/manager.rb
Instance Attribute Summary collapse
-
#config_stack ⇒ Object
readonly
mainly for testing.
Instance Method Summary collapse
- #app_names ⇒ Object
- #apply_config(source, level = 0) ⇒ Object
- #fetch(key) ⇒ Object
- #flattened_config ⇒ Object
-
#initialize ⇒ Manager
constructor
A new instance of Manager.
- #invoke_callbacks(direction, source) ⇒ Object
- #register_callback(key, &proc) ⇒ Object
- #remove_config(source = nil) ⇒ Object
- #replace_or_add_config(source, level = 0) ⇒ Object
- #reset_cache ⇒ Object
- #source(key) ⇒ Object
Constructor Details
#initialize ⇒ Manager
Returns a new instance of Manager.
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# File 'lib/new_relic/agent/configuration/manager.rb', line 15 def initialize @config_stack = [ EnvironmentSource.new, DEFAULTS ] @cache = Hash.new {|hash,key| hash[key] = self.fetch(key) } @callbacks = Hash.new {|hash,key| hash[key] = [] } end |
Instance Attribute Details
#config_stack ⇒ Object (readonly)
mainly for testing
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# File 'lib/new_relic/agent/configuration/manager.rb', line 13 def config_stack @config_stack end |
Instance Method Details
#app_names ⇒ Object
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# File 'lib/new_relic/agent/configuration/manager.rb', line 102 def app_names case self[:app_name] when Array then self[:app_name] when String then self[:app_name].split(';') else [] end end |
#apply_config(source, level = 0) ⇒ Object
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# File 'lib/new_relic/agent/configuration/manager.rb', line 21 def apply_config(source, level=0) invoke_callbacks(:add, source) @config_stack.insert(level, source.freeze) reset_cache end |
#fetch(key) ⇒ Object
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# File 'lib/new_relic/agent/configuration/manager.rb', line 51 def fetch(key) @config_stack.each do |config| next unless config accessor = key.to_sym if config.has_key?(accessor) if config[accessor].respond_to?(:call) return instance_eval(&config[accessor]) else return config[accessor] end end end nil end |
#flattened_config ⇒ Object
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# File 'lib/new_relic/agent/configuration/manager.rb', line 86 def flattened_config @config_stack.reverse.inject({}) do |flat,layer| thawed_layer = layer.dup thawed_layer.each do |k,v| begin thawed_layer[k] = instance_eval(&v) if v.respond_to?(:call) rescue => e NewRelic::Control.instance.log.debug("#{e.class.name} : #{e.} - when accessing config key #{k}") thawed_layer[k] = nil end thawed_layer.delete(:config) end flat.merge(thawed_layer) end end |
#invoke_callbacks(direction, source) ⇒ Object
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# File 'lib/new_relic/agent/configuration/manager.rb', line 71 def invoke_callbacks(direction, source) return unless source source.keys.each do |key| if @cache[key] != source[key] @callbacks[key].each do |proc| if direction == :add proc.call(source[key]) else proc.call(@cache[key]) end end end end end |
#register_callback(key, &proc) ⇒ Object
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# File 'lib/new_relic/agent/configuration/manager.rb', line 66 def register_callback(key, &proc) @callbacks[key] << proc proc.call(@cache[key]) end |
#remove_config(source = nil) ⇒ Object
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# File 'lib/new_relic/agent/configuration/manager.rb', line 27 def remove_config(source=nil) if block_given? @config_stack.delete_if {|c| yield c } else @config_stack.delete(source) end reset_cache invoke_callbacks(:remove, source) end |
#replace_or_add_config(source, level = 0) ⇒ Object
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# File 'lib/new_relic/agent/configuration/manager.rb', line 37 def replace_or_add_config(source, level=0) idx = @config_stack.map{|s| s.class}.index(source.class) @config_stack.delete_at(idx) if idx apply_config(source, idx || level) end |
#reset_cache ⇒ Object
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# File 'lib/new_relic/agent/configuration/manager.rb', line 110 def reset_cache @cache = Hash.new {|hash,key| hash[key] = self.fetch(key) } end |
#source(key) ⇒ Object
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# File 'lib/new_relic/agent/configuration/manager.rb', line 43 def source(key) @config_stack.each do |config| if config.respond_to?(key.to_sym) || config.has_key?(key.to_sym) return config end end end |