com.rhymestore.twitter.config.TwitterModule.java Source code

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Here is the source code for com.rhymestore.twitter.config.TwitterModule.java

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/**
 * Copyright (c) 2010 Enric Ruiz, Ignasi Barrera
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.rhymestore.twitter.config;

import javax.inject.Singleton;

import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.TwitterFactory;
import twitter4j.TwitterStream;
import twitter4j.TwitterStreamFactory;

import com.google.common.base.Supplier;
import com.google.common.base.Suppliers;
import com.google.common.base.Throwables;
import com.google.inject.AbstractModule;
import com.google.inject.Provides;
import com.rhymestore.twitter.stream.GetMentionsListener;

/**
 * Configures the Twitter access.
 * 
 * @author Ignasi Barrera
 */
public class TwitterModule extends AbstractModule {
    @Override
    protected void configure() {
        System.setProperty("twitter4j.oauth.consumerKey", System.getenv("TWITTER_CONSUMERKEY"));
        System.setProperty("twitter4j.oauth.consumerSecret", System.getenv("TWITTER_CONSUMERSECRET"));
        System.setProperty("twitter4j.oauth.accessToken", System.getenv("TWITTER_ACCESSTOKEN"));
        System.setProperty("twitter4j.oauth.accessTokenSecret", System.getenv("TWITTER_ACCESSTOKENSECRET"));
    }

    @Provides
    @Singleton
    public Twitter provideTwitter() {
        return TwitterFactory.getSingleton();
    }

    @Provides
    @Singleton
    public TwitterStream provideTwitterStream(final GetMentionsListener mentionListener) {
        TwitterStream stream = TwitterStreamFactory.getSingleton();
        stream.addListener(mentionListener);
        return stream;
    }

    @Provides
    @Singleton
    public Supplier<String> provideTwitterUser(final Twitter twitter) {
        return Suppliers.memoize(new Supplier<String>() {
            @Override
            public String get() {
                try {
                    return twitter.getScreenName();
                } catch (TwitterException ex) {
                    throw Throwables.propagate(ex);
                }
            }
        });
    }

}