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

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

Instance Method Summary collapse

Methods inherited from Node

#text_value_for_comments

Instance Method Details

#compile ⇒ Object 



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# File 'lib/logstash/config/config_ast.rb', line 94

def compile
  LogStash::Config::AST.defered_conditionals = []
  LogStash::Config::AST.defered_conditionals_index = 0
  LogStash::Config::AST.plugin_instance_index = 0
  code = []

  code << <<-CODE
    @inputs = []
    @filters = []
    @outputs = []
    @periodic_flushers = []
    @shutdown_flushers = []
    @generated_objects = {}
  CODE

  sections = recursive_select(LogStash::Config::AST::PluginSection)
  sections.each do |s|
    code << s.compile_initializer
  end

  # start inputs
  definitions = []

  ["filter", "output"].each do |type|
    # defines @filter_func and @output_func

    # This need to be defined as a singleton method
    # so each instance of the pipeline has his own implementation
    # of the output/filter function
    definitions << "define_singleton_method :#{type}_func do |event|"
    definitions << "  targeted_outputs = []" if type == "output"
    definitions << "  events = [event]" if type == "filter"
    definitions << "  @logger.debug? && @logger.debug(\"#{type} received\", \"event\" => event.to_hash)"

    sections.select { |s| s.plugin_type.text_value == type }.each do |s|
      definitions << s.compile.split("\n", -1).map { |e| "  #{e}" }
    end

    definitions << "  events" if type == "filter"
    definitions << "  targeted_outputs" if type == "output"
    definitions << "end"
  end

  code += definitions.join("\n").split("\n", -1).collect { |l| "  #{l}" }

  code += LogStash::Config::AST.defered_conditionals

  return code.join("\n")
end