com.quicklookbusy.twending.TwendsRequest.java Source code

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Here is the source code for com.quicklookbusy.twending.TwendsRequest.java

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/*
 * TwendsRequest.java
 * 
 * Defines the class used to query Twitter for a list of trending topics
 * 
 * Copyright 2012 Shawn Busolits
 * Licensed under the Apache License, Version 2.0 (the "License"); you may 
 * not use this file except in compliance with the License. You may obtain a 
 * copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 
 * License for the specific language governing permissions and limitations 
 * under the License.
 */

package com.quicklookbusy.twending;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;

import twitter4j.Trends;
import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.TwitterFactory;

import com.quicklookbusy.twending.TwendingService.TwendsCallback;

/**
 * Requests a list of trending topics for the US from Twitter
 * 
 * @author Shawn Busolits
 * @version 1.0
 */
public class TwendsRequest extends Thread {

    /** Callback to cal when the request returns */
    TwendsCallback callback;

    /**
     * Instantiates the request with the provided callback
     * 
     * @param callback
     *            Callback to call when the request returns
     */
    public TwendsRequest(TwendsCallback callback) {
        this.callback = callback;
    }

    /**
     * Makes the request and calls the callback with the acquired data
     */
    public void run() {
        ArrayList<String> topics = new ArrayList<String>();
        Twitter twitter = new TwitterFactory().getInstance();
        Trends usTrends;
        try {
            usTrends = twitter.getLocationTrends(23424977);

            for (int i = 0; i < usTrends.getTrends().length; i++) {
                topics.add(usTrends.getTrends()[i].getName());
            }

            DateFormat dateFormat = new SimpleDateFormat("HH:mm:ss d MMM");
            Calendar cal = Calendar.getInstance();
            topics.add("Last updated at " + dateFormat.format(cal.getTime()));

        } catch (TwitterException e) {
            e.printStackTrace();
        }

        callback.doOnResult(topics);
    }
}