org.apache.streams.youtube.provider.YoutubeChannelProvider.java Source code

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Here is the source code for org.apache.streams.youtube.provider.YoutubeChannelProvider.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.streams.youtube.provider;

import org.apache.streams.config.ComponentConfigurator;
import org.apache.streams.config.StreamsConfiguration;
import org.apache.streams.config.StreamsConfigurator;
import org.apache.streams.core.StreamsDatum;
import org.apache.streams.google.gplus.configuration.UserInfo;
import org.apache.streams.jackson.StreamsJacksonMapper;
import org.apache.streams.util.api.requests.backoff.BackOffStrategy;
import org.apache.streams.youtube.YoutubeConfiguration;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.api.services.youtube.YouTube;
import com.google.common.base.Preconditions;
import com.google.common.util.concurrent.Uninterruptibles;
import com.typesafe.config.Config;
import com.typesafe.config.ConfigFactory;
import com.typesafe.config.ConfigParseOptions;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintStream;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.TimeUnit;

/**
 * Retrieve recent activity from a list of channels.
 */
public class YoutubeChannelProvider extends YoutubeProvider {

    public YoutubeChannelProvider() {
        super();
    }

    public YoutubeChannelProvider(YoutubeConfiguration config) {
        super(config);
    }

    /**
     * To use from command line:
     * <p/>
     * Supply (at least) the following required configuration in application.conf:
     * <p/>
     * youtube.oauth.pathToP12KeyFile
     * youtube.oauth.serviceAccountEmailAddress
     * youtube.apiKey
     * youtube.youtubeUsers
     * <p/>
     * Launch using:
     * <p/>
     * mvn exec:java -Dexec.mainClass=org.apache.streams.youtube.provider.YoutubeUserActivityProvider -Dexec.args="application.conf tweets.json"
     * @param args args
     * @throws Exception Exception
     */
    public static void main(String[] args) throws Exception {

        Preconditions.checkArgument(args.length >= 2);

        String configfile = args[0];
        String outfile = args[1];

        Config reference = ConfigFactory.load();
        File file = new File(configfile);
        assert (file.exists());
        Config testResourceConfig = ConfigFactory.parseFileAnySyntax(file,
                ConfigParseOptions.defaults().setAllowMissing(false));

        Config typesafe = testResourceConfig.withFallback(reference).resolve();

        StreamsConfiguration streamsConfiguration = StreamsConfigurator.detectConfiguration(typesafe);
        YoutubeConfiguration config = new ComponentConfigurator<>(YoutubeConfiguration.class)
                .detectConfiguration(typesafe, "youtube");
        YoutubeChannelProvider provider = new YoutubeChannelProvider(config);

        ObjectMapper mapper = StreamsJacksonMapper.getInstance();

        PrintStream outStream = new PrintStream(new BufferedOutputStream(new FileOutputStream(outfile)));
        provider.prepare(config);
        provider.startStream();
        do {
            Uninterruptibles.sleepUninterruptibly(streamsConfiguration.getBatchFrequencyMs(),
                    TimeUnit.MILLISECONDS);
            for (StreamsDatum datum : provider.readCurrent()) {
                String json;
                try {
                    if (datum.getDocument() instanceof String) {
                        json = (String) datum.getDocument();
                    } else {
                        json = mapper.writeValueAsString(datum.getDocument());
                    }
                    outStream.println(json);
                } catch (JsonProcessingException ex) {
                    System.err.println(ex.getMessage());
                }
            }
        } while (provider.isRunning());
        provider.cleanUp();
        outStream.flush();
    }

    @Override
    protected Runnable getDataCollector(BackOffStrategy strategy, BlockingQueue<StreamsDatum> queue,
            YouTube youtube, UserInfo userInfo) {
        return new YoutubeChannelDataCollector(youtube, queue, strategy, userInfo, this.config);
    }
}