ManageIQ/manageiq

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app/models/metric/processing.rb

Summary

Maintainability
C
1 day
Test Coverage
B
82%

Method process_derived_columns has a Cognitive Complexity of 68 (exceeds 11 allowed). Consider refactoring.
Open

  def self.process_derived_columns(obj, attrs, ts = nil)
    unless VALID_PROCESS_TARGETS.any? { |t| obj.kind_of?(t) }
      raise _("object %{name} is not one of %{items}") % {:name  => obj,
                                                          :items => VALID_PROCESS_TARGETS.collect(&:name).join(", ")}
    end
Severity: Minor
Found in app/models/metric/processing.rb - About 1 day to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Cyclomatic complexity for process_derived_columns is too high. [41/11]
Open

  def self.process_derived_columns(obj, attrs, ts = nil)
    unless VALID_PROCESS_TARGETS.any? { |t| obj.kind_of?(t) }
      raise _("object %{name} is not one of %{items}") % {:name  => obj,
                                                          :items => VALID_PROCESS_TARGETS.collect(&:name).join(", ")}
    end
Severity: Minor
Found in app/models/metric/processing.rb by rubocop

This cop checks that the cyclomatic complexity of methods is not higher than the configured maximum. The cyclomatic complexity is the number of linearly independent paths through a method. The algorithm counts decision points and adds one.

An if statement (or unless or ?:) increases the complexity by one. An else branch does not, since it doesn't add a decision point. The && operator (or keyword and) can be converted to a nested if statement, and ||/or is shorthand for a sequence of ifs, so they also add one. Loops can be said to have an exit condition, so they add one.

Method create_new_metric has a Cognitive Complexity of 12 (exceeds 11 allowed). Consider refactoring.
Open

  def self.create_new_metric(klass, last_perf, perf, interval)
    attrs = last_perf.attributes
    attrs.delete('id')
    attrs['timestamp'] += interval
    attrs['capture_interval'] = 0
Severity: Minor
Found in app/models/metric/processing.rb - About 25 mins to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Avoid more than 3 levels of block nesting.
Open

            attrs[:mem_usage_absolute_average] = 100.0 / total_mem * attrs[:derived_memory_used] if total_mem > 0 && !attrs[:derived_memory_used].nil?
Severity: Minor
Found in app/models/metric/processing.rb by rubocop

This cop checks for excessive nesting of conditional and looping constructs.

You can configure if blocks are considered using the CountBlocks option. When set to false (the default) blocks are not counted towards the nesting level. Set to true to count blocks as well.

The maximum level of nesting allowed is configurable.

Avoid more than 3 levels of block nesting.
Open

            result[col] = (attrs[:mem_usage_absolute_average] / 100 * total_mem) unless total_mem == 0 || attrs[:mem_usage_absolute_average].nil?
Severity: Minor
Found in app/models/metric/processing.rb by rubocop

This cop checks for excessive nesting of conditional and looping constructs.

You can configure if blocks are considered using the CountBlocks option. When set to false (the default) blocks are not counted towards the nesting level. Set to true to count blocks as well.

The maximum level of nesting allowed is configurable.

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