Class: Scoped

Inherits:
Object
  • Object
show all
Includes:
MonitorUtilities
Defined in:
lib/rearview/templates/monitor.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods included from MonitorUtilities

#collect_aberrations, #collect_comparisons, #deploy_check, #outside_limits?, #percentage_errors

Constructor Details

#initialize(timeout) ⇒ Scoped

Returns a new instance of Scoped.



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# File 'lib/rearview/templates/monitor.rb', line 59

def initialize(timeout)
  @graph_data         = {}
  @graph_data.default = [] # make the default value an empty array
  @timeout            = timeout
end

Class Method Details

.to_s ⇒ Object

Bolt on a to_s to @timeseries to pretty print the instances



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# File 'lib/rearview/templates/monitor.rb', line 92

def @timeseries.to_s
  "[ #{self.join ", "} ]"
end

Instance Method Details

#fold_metrics(initial, &block) ⇒ Object 



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# File 'lib/rearview/templates/monitor.rb', line 69

def fold_metrics(initial, &block)
  iterations = @timeseries[0].values.length
  iterations.times.inject(initial) do |accum, i|
    entries = @timeseries.map { |series| series.entries[i] }
    block.call accum, *entries
  end
end

#graph_value(name, timestamp, value) ⇒ Object 



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# File 'lib/rearview/templates/monitor.rb', line 65

def graph_value(name, timestamp, value)
  @graph_data[name] += [[timestamp, value]]
end

#scoped_eval(namespace) ⇒ Object 



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# File 'lib/rearview/templates/monitor.rb', line 85

def scoped_eval(namespace)
  # Copy instance variables from top-level class into current scope
  namespace.keys.each do |v|
    instance_variable_set "#{v}".to_sym, namespace[v]
  end

  # Bolt on a to_s to @timeseries to pretty print the instances
  def @timeseries.to_s
    "[ #{self.join ", "} ]"
  end

  out = StringIO.new

  t = Thread.start do
    $stdout = out
    $SAFE=3
    begin
      graph_value = lambda { |name, timestamp, value| graph_value(name, timestamp, value) }
      %{expression}
    rescue RuntimeError => e
      out.write e
      @error = e.to_s
    end
  end

  t.abort_on_exception = false

  begin
    t.join
  rescue => e
    out.write e
    @error = e.to_s
  ensure
    $SAFE = 0
    $stdout = STDOUT
    $stderr = STDERR
  end

  { :graph_data => @graph_data, :output => out.string, :error => @error}.to_json
end

#with_metrics(&block) ⇒ Object 



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# File 'lib/rearview/templates/monitor.rb', line 77

def with_metrics(&block)
  iterations = @timeseries[0].values.length
  iterations.times.each do |i|
    entries = @timeseries.map { |series| series.entries[i] }
    block.call *entries
  end
end