PrinterBolt.java

public void execute(Tuple input) {
	Object obj = input.getValueByField("rankings");
	try {
		Rankings ranking = (Rankings) obj;
		LOGGER.debug("input ranking : {}", ranking);
		int count = 1;
		for(Rankable rank : ranking.getRankings()) {
			LOGGER.info("RANK : {}, HashTag : {}, Count : {}", count++, rank.getObject(), rank.getCount());
		}
	} catch (Exception e) {
		LOGGER.error("Exception occurred. {}", e);
	}
	collector.ack(input);
}