Class: HAProxy::Renderer

Inherits:
Object
  • Object
show all
Defined in:
lib/haproxy/renderer.rb

Overview

Responsible for rendering an HAProxy::Config instance to a string.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config, source_tree) ⇒ Renderer

Returns a new instance of Renderer.



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# File 'lib/haproxy/renderer.rb', line 7

def initialize(config, source_tree)
  self.config       = config
  self.source_tree  = source_tree
  @server_list      = {}
  @config_list      = {}
  @context          = self.config
  @prev_context     = self.config
  @config_text      = ''
end

Instance Attribute Details

#config ⇒ Object

Returns the value of attribute config.



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# File 'lib/haproxy/renderer.rb', line 5

def config
  @config
end

#source_tree ⇒ Object

Returns the value of attribute source_tree.



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# File 'lib/haproxy/renderer.rb', line 5

def source_tree
  @source_tree
end

Instance Method Details

#render ⇒ Object 



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# File 'lib/haproxy/renderer.rb', line 17

def render
  render_node(self.source_tree)
  handle_context_change
  @config_text
end

#render_node(node) ⇒ Object 



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# File 'lib/haproxy/renderer.rb', line 23

def render_node(node)
  node.elements.each do |e|
    update_render_context(e)

    handle_context_change if context_changed?

    if e.class == HAProxy::Treetop::ServerLine
      # Keep track of the servers that we've seen, so that we can detect and render new ones.
      @server_list[e.name] = e
      # Don't render the server element if it's been deleted from the config.
      next if @context.servers[e.name].nil?
    end

    if e.class == HAProxy::Treetop::ConfigLine and @context.class == HAProxy::Default
      # Keep track of the configs in this config block we've seen, so that we can detect and render new ones.
      @config_list[e.key] = e
      # Don't render the config *if* it's been removed from the config block.
      next if @context.config[e.key].nil?
    end

    if e.class == HAProxy::Treetop::ServerLine
      # Use a custom rendering method for servers, since we allow them to be
      # added/removed/changed.
      render_server_element(e)
    elsif e.class== HAProxy::Treetop::ConfigLine and @context.class == HAProxy::Default
      # Use a custom rendering method for configs, since we allow them to be
      # added/removed/changed.
      render_config_line_element(e)
    elsif e.elements && e.elements.size > 0
      render_node(e)
    else
      @config_text << e.text_value
    end
  end
  @config_text
end