Class: LogStash::Config::AST::Plugin

Inherits:
Node
  • Object
show all
Defined in:
lib/logstash/config/config_ast.rb

Instance Method Summary collapse

Instance Method Details

#compile ⇒ Object 



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# File 'lib/logstash/config/config_ast.rb', line 152

def compile
  case plugin_type
    when "input"
      return "start_input(#{variable_name})"
    when "filter"
      # This is some pretty stupid code, honestly.
      # I'd prefer much if it were put into the Pipeline itself
      # and this should simply compile to 
      #   #{variable_name}.filter(event)
      return [
        "newevents = []",
        "extra_events.each do |event|",
        "  #{variable_name}.filter(event) do |newevent|",
        "    newevents << newevent",
        "  end",
        "end",
        "extra_events += newevents",

        "#{variable_name}.filter(event) do |newevent|",
        "  extra_events << newevent",
        "end",
        "if event.cancelled?",
        "  extra_events.each(&block)",
        "  return",
        "end",
      ].map { |l| "#{l}\n" }.join("")
    when "output"
      return "#{variable_name}.handle(event)\n"
    when "codec"
      settings = attributes.recursive_select(Attribute).collect(&:compile).reject(&:empty?)
      attributes_code = "LogStash::Util.hash_merge_many(#{settings.map { |c| "{ #{c} }" }.join(", ")})"
      return "plugin(#{plugin_type.inspect}, #{plugin_name.inspect}, #{attributes_code})"
  end
end

#compile_initializer ⇒ Object 



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# File 'lib/logstash/config/config_ast.rb', line 139

def compile_initializer
  # If any parent is a Plugin, this must be a codec.

  if attributes.elements.nil?
    return "plugin(#{plugin_type.inspect}, #{plugin_name.inspect})" << (plugin_type == "codec" ? "" : "\n")
  else
    settings = attributes.recursive_select(Attribute).collect(&:compile).reject(&:empty?)

    attributes_code = "LogStash::Util.hash_merge_many(#{settings.map { |c| "{ #{c} }" }.join(", ")})"
    return "plugin(#{plugin_type.inspect}, #{plugin_name.inspect}, #{attributes_code})" << (plugin_type == "codec" ? "" : "\n")
  end
end

#plugin_name ⇒ Object 



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# File 'lib/logstash/config/config_ast.rb', line 131

def plugin_name
  return name.text_value
end

#plugin_type ⇒ Object 



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# File 'lib/logstash/config/config_ast.rb', line 123

def plugin_type
  if recursive_select_parent(Plugin).any?
    return "codec"
  else
    return recursive_select_parent(PluginSection).first.plugin_type.text_value
  end
end

#variable_name ⇒ Object 



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# File 'lib/logstash/config/config_ast.rb', line 135

def variable_name
  return recursive_select_parent(PluginSection).first.variable(self)
end