Class: Stratagem::Instrumentation::Models::Annotations

Inherits:
Object
  • Object
show all
Includes:
Metadata, Tracing
Defined in:
lib/stratagem/instrumentation/models/annotations.rb

Defined Under Namespace

Classes: AdapterDescriptor

Constant Summary

Constants included from Metadata

Metadata::INSTANCE_ENTITY_METHODS, Metadata::INSTANCE_ENUMERATION_METHODS

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Tracing

#add_invocation, #clear_invocations, #controller_trace, #invocation, #invocations_audit, invocations_audit, #parse_trace_line, #read_invocation, #read_invocations, #validator_called, #write_invocation, #write_invocations

Methods included from Metadata

#callbacks, #connected_classes, #foreign_keys, included, #relation, #relation_names, #subclasses?, #validations, #validators

Constructor Details

#initialize(model) ⇒ Annotations

Returns a new instance of Annotations.



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# File 'lib/stratagem/instrumentation/models/annotations.rb', line 111

def initialize(model)
  puts "initializing stratagem for #{model.name}"
  @model = model
  self.class.detect_adapters(model).each do |adapter|
    if adapter.detector.supports?(model)
      # puts "\t#{model.name} supports #{adapter.detector.name}"
      instrument_model(adapter)
    else
      # puts "#{model.name} does not support #{adapter.detector.name}"
    end
  end
rescue
  puts $!.message
  puts $!.backtrace
end

Instance Attribute Details

#model ⇒ Object (readonly)

Returns the value of attribute model.



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# File 'lib/stratagem/instrumentation/models/annotations.rb', line 51

def model
  @model
end

Class Method Details

.configure(model) ⇒ Object 



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# File 'lib/stratagem/instrumentation/models/annotations.rb', line 56

def configure(model)
  puts "configuring #{model.name}"
  
  # add the stratagem namespace
  model.class_eval do 
    def self.stratagem
      # one stratagem instance per subclass
      @@stratagem ||= {}
      @@stratagem[self] ||= Stratagem::Instrumentation::Models::Annotations.new(self)
    end


    def stratagem
      @stratagem ||= Stratagem::Instrumentation::Models::InstanceAnnotations.new(self)
    end
  end

  # connect the adapters
  detect_adapters(model).each {|adapter|
    if adapter.detector.supports?(model)
      begin
        puts "#{model.name} supports #{adapter.tracing.name}"
        model.send(:include, adapter.tracing) 
      rescue
        Rails.logger.error($!)
      end
    end
  }
end

.detect_adapters(model) ⇒ Object 



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# File 'lib/stratagem/instrumentation/models/annotations.rb', line 86

def detect_adapters(model)
  @detectors ||= Detect.sg_subclasses
  @detectors.map do |detector|
    namespace = detector.name.split('::')
    namespace.pop
    namespace = namespace.join('::')
    instrumentation = module_class_ref(namespace+"::Instrumentation")
    tracing = module_class_ref(namespace+"::Tracing")
    metadata = module_class_ref(namespace+"::Metadata")
    metadata = metadata.new(model) if metadata
    AdapterDescriptor.new(metadata, detector, tracing, instrumentation)
  end
end

.module_class_ref(name) ⇒ Object 



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# File 'lib/stratagem/instrumentation/models/annotations.rb', line 100

def module_class_ref(name)
  begin
    module_eval(name)
  rescue Exception
    nil
  end
end

Instance Method Details

#adapters ⇒ Object 



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# File 'lib/stratagem/instrumentation/models/annotations.rb', line 141

def adapters
  # supported adapters may change throughout the lifecycle of a class / object
  @adapters ||= self.class.detect_adapters(model)
end

#instrument_model(adapter) ⇒ Object 



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# File 'lib/stratagem/instrumentation/models/annotations.rb', line 127

def instrument_model(adapter)
  instrument_model_with(adapter.tracing)
  instrument_model_with(adapter.instrumentation)
end

#instrument_model_with(instrumentation) ⇒ Object 



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# File 'lib/stratagem/instrumentation/models/annotations.rb', line 132

def instrument_model_with(instrumentation)
  return if instrumentation.nil?
  
  unless model.ancestors.include?(instrumentation)
    puts "including #{instrumentation.name} in #{model.name}"
    model.send(:include, instrumentation)
  end
end