Class: Rssdump::Dumper

Inherits:
Object
  • Object
show all
Defined in:
lib/rssdump/dumper.rb

Instance Method Summary collapse

Constructor Details

#initialize(opt) ⇒ Dumper

Returns a new instance of Dumper.



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# File 'lib/rssdump/dumper.rb', line 5

def initialize opt
  @mongo_url = opt[:mongo_url] || raise("Missing opt :mongo_url")
  @store = MongoStore.new @mongo_url
  @logger = Logging.logger[self]
end

Instance Method Details

#dump(file, opts = {threads: 1}) ⇒ Object 



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# File 'lib/rssdump/dumper.rb', line 37

def dump file, opts = {threads: 1}
  @logger.info "Starting a batch scrap from feed file #{file} [opts: #{opts}]"
  pool = Thread.pool(opts[:threads])
  mutex = Mutex.new

  @start = Time.now
  nb_inserted = 0
  IO.readlines(file, :encoding => 'UTF-8').select do |l|
    !l.strip.empty? && !l.strip.start_with?('#')
  end.map do |l|
    l.split("\t").map(&:strip)
  end.each do |feed_name, feed_url|
    pool.process do
      res = dump_feed(feed_name, feed_url)
      mutex.synchronize do
        nb_inserted += res[:nb_inserted] if res[:status] == 0
      end
    end
  end

  # wait until all tasks are finished

  @logger.info "Waiting for all pools to process."
  pool.shutdown
  @logger.info "All pools processed !"

  @logger.info "Finished dumping file #{file} in #{"%.3f" % (Time.now - @start)} seconds."
  @logger.info "Num of new items inserted #{nb_inserted}."
  @logger.info "Total number of items in db: #{@store.nb_items}."
  @logger.info "Data size : #{ '%.2f' % @store.disk_usage_mb}Mb."
end

#dump_feed(feed_name, feed_url) ⇒ Object 



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# File 'lib/rssdump/dumper.rb', line 11

def dump_feed feed_name, feed_url
  begin
    scraper = Scraper.new
    @logger.info "Scraping feed #{feed_name} - #{feed_url}"
    items = scraper.scrap feed_url, feed_name
    nb = 0
    for item in items
      inserted = @store.upsert item
      nb+=1 if inserted
    end
    if nb > 0
      @logger.info "#{nb} new items inserted for feed #{feed_name} - #{feed_url}"
    else
      @logger.debug "No new item inserted for feed #{feed_name} - #{feed_url}"
    end
    if(nb == items.count)
      @logger.warn "All #{nb} items were new for feed #{feed_name}. Consider increasing the scraping frequency"
    end
    {status: 0, nb_inserted: nb}
  rescue => e
    @logger.error "An error occurred while scraping feed #{feed_name} - #{feed_url}"
    @logger.error "#{e}\n#{e.backtrace.join("\n")}"
    {status: 1, error: e}
  end
end