Class: Traject::JsonWriter

Inherits:
LineWriter show all
Defined in:
lib/traject/json_writer.rb

Overview

A writer for Traject::Indexer, that just writes out all the output as Json. It’s newline delimitted json, but right now no checks to make sure there is no internal newlines as whitespace in the json. TODO, add that.

Should be thread-safe (ie, multiple worker threads can be calling #put concurrently), by wrapping write to actual output file in a mutex synchronize. This does not seem to effect performance much, as far as I could tell benchmarking.

You can force pretty-printing with setting ‘json_writer.pretty_print’ of boolean true or string ‘true’. Useful mostly for human checking of output.

Output will be sent to settings string path, or else settings (ruby IO object), or else stdout.

Instance Attribute Summary

Attributes inherited from LineWriter

#settings, #write_mutex

Instance Method Summary collapse

Methods inherited from LineWriter

#close, #initialize, #output_file, #put

Constructor Details

This class inherits a constructor from Traject::LineWriter

Instance Method Details

#serialize(context) ⇒ Object 



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# File 'lib/traject/json_writer.rb', line 21

def serialize(context)
  hash = context.output_hash
  if settings["json_writer.pretty_print"]
    JSON.pretty_generate(hash)
  else
    JSON.generate(hash)
  end
end