net.peterkuterna.android.apps.devoxxsched.service.TwitterSearchService.java Source code

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Here is the source code for net.peterkuterna.android.apps.devoxxsched.service.TwitterSearchService.java

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/*
 * Copyright 2011 Peter Kuterna
 *
 * 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 net.peterkuterna.android.apps.devoxxsched.service;

import net.peterkuterna.android.apps.devoxxsched.io.RemoteExecutor;
import net.peterkuterna.android.apps.devoxxsched.io.TwitterSearchHandler;
import net.peterkuterna.android.apps.devoxxsched.provider.CfpContract;
import net.peterkuterna.android.apps.devoxxsched.provider.CfpContract.Tweets;
import net.peterkuterna.android.apps.devoxxsched.util.HttpUtils;
import net.peterkuterna.android.apps.devoxxsched.util.TwitterApiUriUtils;

import org.apache.http.client.HttpClient;

import android.app.Service;
import android.content.ContentResolver;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.util.Log;

/**
 * Background {@link Service} that performs twitter search operations through
 * the Twitter search API.
 */
public class TwitterSearchService extends AbstractSyncService {

    protected static final String TAG = "TwitterSearchService";

    private RemoteExecutor mRemoteExecutor;
    private HttpClient mHttpClient;
    private ContentResolver mResolver;

    public TwitterSearchService() {
        super(TAG);
    }

    @Override
    public void onCreate() {
        super.onCreate();

        mHttpClient = HttpUtils.getHttpClient(this);
        mResolver = getContentResolver();

        mRemoteExecutor = new RemoteExecutor(mHttpClient, mResolver);
    }

    @Override
    protected void doSync(Intent intent) throws Exception {
        Log.d(TAG, "Refreshing twitter results");

        final Cursor c = mResolver.query(Tweets.CONTENT_URI, TweetsQuery.PROJECTION, null, null, null);

        String tweetId = "0";
        try {
            if (c.moveToFirst()) {
                tweetId = c.getString(TweetsQuery.MAX_TWEET_ID);
            }
        } finally {
            c.close();
        }

        final Uri uri = TwitterApiUriUtils.buildTwitterSearchUri("from:Devoxx OR #devoxx +exclude:retweets",
                tweetId);

        mRemoteExecutor.executeGet(uri.toString(), new TwitterSearchHandler());
    }

    /**
     * {@link Tweets} query parameters.
     */
    private interface TweetsQuery {

        String PROJECTION[] = { "MAX(" + CfpContract.Tweets.TWEET_ID + ") AS max_tweet_id" };

        int MAX_TWEET_ID = 0;

    }

}