Class: LogStash::Filters::List2fields

Inherits:
Base
  • Object
show all
Defined in:
lib/logstash/filters/list2fields.rb

Instance Method Summary collapse

Instance Method Details

#filter(event) ⇒ Object 



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# File 'lib/logstash/filters/list2fields.rb', line 33

def filter(event)
  input = event.get(@source)
  if !input.nil?  && (input.is_a? Enumerable)     
    input.each do |entry|
      begin
        @logger.warn(entry.to_a.to_s)
        if @access_by_name

          if entry.is_a?(::Hash) # see spec file: test case 1 
            if !entry[@key].nil?
              new_key = @prefix.to_s + entry[@key].to_s
              value = entry[@value]
              @logger.info("Adding new field " + new_key + " with value " + value)
            else # might be a symbol then and we need to convert our keys to :keys
              new_key = @prefix.to_s + entry[@key.to_sym].to_s
              value = entry[@value.to_sym]
              @logger.info("Adding new field " + new_key + ", value " + value)
            end
            event.set(new_key, value)
          else # it's an object of some unknown class.
            @logger.warn("Data structure not supported. " + entry.inspect.to_s) 
          end # if is hash

        else # access by position, no key / value names provided
          
          if entry.is_a?(::Hash)  # see spec file: test case 2
            new_key = @prefix.to_s + entry.keys[0].to_s
            event.set(new_key, entry.values[0])

          else # it's an object of some unknown class. 
            @logger.warn("Data structure not supported. " + entry.inspect.to_s)
          end # if is hash

        end # acess type
      rescue 
        @logger.debug("Could not find key " + @key + " in incoming data, please check your config. ")
      end
    end # do
    if @remove_source
      event.remove(@source)
    end
  
  end # if input.nil? 
end

#register ⇒ Object 



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# File 'lib/logstash/filters/list2fields.rb', line 28

def register
  @access_by_name = !@key.empty? && !@value.empty?   
end