Class: Puppet::Graph::RelationshipGraph Private

Inherits:
SimpleGraph show all
Defined in:
lib/puppet/graph/relationship_graph.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

The relationship graph is the final form of a puppet catalog in which all dependency edges are explicitly in the graph. This form of the catalog is used to traverse the graph in the order in which resources are managed.

API:

  • private

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from SimpleGraph

#add_edge, #adjacent, #clear, #dependencies, #dependents, #direct_dependencies_of, #direct_dependents_of, #directed?, #downstream_from_vertex, #each_edge, #edge?, #edges, #edges_between, #find_cycles_in_graph, #instance_variable_get, #leaves, #matching_edges, #path_between, #paths_in_cycle, #remove_edge!, #report_cycles_in_graph, #reversal, #size, #tarjan, #to_a, #to_dot, #to_dot_graph, #to_yaml_properties, #tree_from_vertex, #upstream_from_vertex, #vertex?, #vertices, #walk, #write_cycles_to_graph, #write_graph, #yaml_initialize

Constructor Details

#initialize(prioritizer) ⇒ RelationshipGraph

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a new instance of RelationshipGraph.

API:

  • private



10
11
12
13
14
15
16
17
18
19
20
 
# File 'lib/puppet/graph/relationship_graph.rb', line 10

def initialize(prioritizer)
  super()

  @prioritizer = prioritizer

  @ready = Puppet::Graph::RbTreeMap.new
  @generated = {}
  @done = {}
  @blockers = {}
  @providerless_types = []
end

Instance Attribute Details

#blockers ⇒ Object (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

API:

  • private



8
9
10
 
# File 'lib/puppet/graph/relationship_graph.rb', line 8

def blockers
  @blockers
end

Instance Method Details

#add_relationship(f, t, label = nil) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

API:

  • private



44
45
46
47
 
# File 'lib/puppet/graph/relationship_graph.rb', line 44

def add_relationship(f, t, label=nil)
  super(f, t, label)
  @ready.delete(@prioritizer.priority_of(t))
end

#add_vertex(vertex, priority = nil) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

API:

  • private



34
35
36
37
38
39
40
41
42
 
# File 'lib/puppet/graph/relationship_graph.rb', line 34

def add_vertex(vertex, priority = nil)
  super(vertex)

  if priority
    @prioritizer.record_priority_for(vertex, priority)
  else
    @prioritizer.generate_priority_for(vertex)
  end
end

#clear_blockers ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

API:

  • private



78
79
80
 
# File 'lib/puppet/graph/relationship_graph.rb', line 78

def clear_blockers
  @blockers.clear
end

#enqueue(*resources) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

API:

  • private



82
83
84
85
86
 
# File 'lib/puppet/graph/relationship_graph.rb', line 82

def enqueue(*resources)
  resources.each do |resource|
    @ready[@prioritizer.priority_of(resource)] = resource
  end
end

#enqueue_roots ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Enqueue the initial set of resources, those with no dependencies.

API:

  • private



59
60
61
62
63
64
 
# File 'lib/puppet/graph/relationship_graph.rb', line 59

def enqueue_roots
  vertices.each do |v|
    @blockers[v] = direct_dependencies_of(v).length
    enqueue(v) if @blockers[v] == 0
  end
end

#finish(resource) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

API:

  • private



88
89
90
91
92
93
 
# File 'lib/puppet/graph/relationship_graph.rb', line 88

def finish(resource)
  direct_dependents_of(resource).each do |v|
    enqueue(v) if unblock(v)
  end
  @done[resource] = true
end

#next_resource ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

API:

  • private



95
96
97
 
# File 'lib/puppet/graph/relationship_graph.rb', line 95

def next_resource
  @ready.delete_min
end

#populate_from(catalog) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

API:

  • private



22
23
24
25
26
27
28
29
30
31
32
 
# File 'lib/puppet/graph/relationship_graph.rb', line 22

def populate_from(catalog)
  add_all_resources_as_vertices(catalog)
  build_manual_dependencies
  build_autorelation_dependencies(catalog)

  write_graph(:relationships) if catalog.host_config?

  replace_containers_with_anchors(catalog)

  write_graph(:expanded_relationships) if catalog.host_config?
end

#remove_vertex!(vertex) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

API:

  • private



49
50
51
52
 
# File 'lib/puppet/graph/relationship_graph.rb', line 49

def remove_vertex!(vertex)
  super
  @prioritizer.forget(vertex)
end

#resource_priority(resource) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

API:

  • private



54
55
56
 
# File 'lib/puppet/graph/relationship_graph.rb', line 54

def resource_priority(resource)
  @prioritizer.priority_of(resource)
end

#traverse(options = {}, &block) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

API:

  • private



99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
 
# File 'lib/puppet/graph/relationship_graph.rb', line 99

def traverse(options = {}, &block)
  continue_while = options[:while] || lambda { true }
  pre_process = options[:pre_process] || lambda { |resource| }
  overly_deferred_resource_handler = options[:overly_deferred_resource_handler] || lambda { |resource| }
  canceled_resource_handler = options[:canceled_resource_handler] || lambda { |resource| }
  teardown = options[:teardown] || lambda {}

  report_cycles_in_graph

  enqueue_roots

  deferred_resources = []

  while continue_while.call() && (resource = next_resource)
    if resource.suitable?
      made_progress = true

      pre_process.call(resource)

      yield resource

      finish(resource)
    else
      deferred_resources << resource
    end

    if @ready.empty? and deferred_resources.any?
      if made_progress
        enqueue(*deferred_resources)
      else
        deferred_resources.each do |res|
          overly_deferred_resource_handler.call(res)
          finish(res)
        end
      end

      made_progress = false
      deferred_resources = []
    end
  end

  if !continue_while.call()
    while (resource = next_resource)
      canceled_resource_handler.call(resource)
      finish(resource)
    end
  end

  teardown.call()
end

#unblock(resource) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Decrement the blocker count for the resource by 1. If the number of blockers is unknown, count them and THEN decrement by 1.

API:

  • private



68
69
70
71
72
73
74
75
76
 
# File 'lib/puppet/graph/relationship_graph.rb', line 68

def unblock(resource)
  @blockers[resource] ||= direct_dependencies_of(resource).select { |r2| !@done[r2] }.length
  if @blockers[resource] > 0
    @blockers[resource] -= 1
  else
    resource.warning "appears to have a negative number of dependencies"
  end
  @blockers[resource] <= 0
end