Module: Instana::Util

Defined in:
lib/instana/util.rb

Class Method Summary collapse

Class Method Details

.enforce_deltas(candidate, last) ⇒ Object

Take two hashes, and make sure candidate does not have any of the same values as ‘last`. We only report when values change.

Note this is not recursive, so only pass in the single hashes that you want delta reporting with.



31
32
33
34
35
36
37
38
39
40
 
# File 'lib/instana/util.rb', line 31

def enforce_deltas(candidate, last)
  return unless last.is_a?(Hash)

  candidate.each do |k,v|
    if candidate[k] == last[k]
      candidate.delete(k)
    end
  end
  candidate
end

.method_alias(klass, method) ⇒ Object

An agnostic approach to method aliasing.

Parameters:

  • klass (Object) —

    The class or module that holds the method to be alias’d.

  • method (Symbol) —

    The name of the method to be aliased.



9
10
11
12
13
14
15
16
17
18
19
20
21
22
 
# File 'lib/instana/util.rb', line 9

def method_alias(klass, method)
  if klass.method_defined?(method.to_sym)

    with = "#{method}_with_instana"
    without = "#{method}_without_instana"

    klass.class_eval do
      alias_method without, method.to_s
      alias_method method.to_s, with
    end
  else
    ::Instana.logger.debug "No such method (#{method}) to alias on #{klass}"
  end
end

.pry! ⇒ Object

Debugging helper method



44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
 
# File 'lib/instana/util.rb', line 44

def pry!
  # Only valid for development or test environments
  #env = ENV['RACK_ENV'] || ENV['RAILS_ENV']
  #return unless %w(development, test).include? env

  if RUBY_VERSION > '1.8.7'
    require 'pry-byebug'

    if defined?(PryByebug)
      Pry.commands.alias_command 'c', 'continue'
      Pry.commands.alias_command 's', 'step'
      Pry.commands.alias_command 'n', 'next'
      Pry.commands.alias_command 'f', 'finish'

      Pry::Commands.command(/^$/, 'repeat last command') do
        _pry_.run_command Pry.history.to_a.last
      end
    end

    binding.pry
  else
    require 'ruby-debug'; debugger
  end
end