RedisRetweetBolt.java

package com.ebottabi.bolt;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.json.simple.JSONObject;

import twitter4j.Status;

/**
 *
 * Bolt that will publish to a redis channel those tweets that have been
 * retweeted a number of times.
 *
 * Can be moved this bolt to any other that alread works with the tweets but,
 * this is just a test :P
 *
 * @author ebot
 *
 */
public class RedisRetweetBolt extends RedisBolt {

    public static final String CHANNEL = "retweets";
    protected int retweetCount;

    public RedisRetweetBolt(int count) {
        super(CHANNEL);
        retweetCount = count;
    }

    @Override
    public List<Object> filter(Status original) {
        Status status = original.getRetweetedStatus();
        if (status == null) {
            return null;
        }
        if (status.getRetweetCount() < retweetCount) {
            return null;
        }

        //Just tweets two days old
        if (status.getCreatedAt().getTime() + 2 * 24 * 60 * 60 * 1000 < System.currentTimeMillis()) {
            return null;
        }

        JSONObject msg = new JSONObject();
        msg.put("user", original.getUser().getScreenName());
        msg.put("photo", original.getUser().getProfileImageURL().toString());
        msg.put("tweet", original.getText());
        msg.put("id", original.getId());
        //msg.put("count", status.getRetweetCount() > 100 ? "> 100" : status.getRetweetCount());
        msg.put("count", status.getRetweetCount());

        publish(msg.toJSONString());

        List<Object> result = new ArrayList<Object>();
        result.add(status);
        return result;
    }

    @Override
    public Map<String, Object> getComponentConfiguration() {
        return null;
    }
}