local/twitter-history-elasticsearch/src/main/java/org/apache/streams/example/twitter/TwitterHistoryElasticsearch.java

/*
 * 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
 *
 *   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.example.twitter;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.typesafe.config.Config;
import org.apache.streams.config.ComponentConfigurator;
import org.apache.streams.config.StreamsConfigurator;
import org.apache.streams.converter.ActivityConverterProcessor;
import org.apache.streams.core.StreamBuilder;
import org.apache.streams.elasticsearch.ElasticsearchConfigurator;
import org.apache.streams.elasticsearch.ElasticsearchPersistWriter;
import org.apache.streams.elasticsearch.ElasticsearchWriterConfiguration;
import org.apache.streams.local.builders.LocalStreamBuilder;
import org.apache.streams.pojo.json.Activity;
import org.apache.streams.twitter.TwitterStreamConfiguration;
import org.apache.streams.twitter.TwitterUserInformationConfiguration;
import org.apache.streams.twitter.processor.TwitterTypeConverter;
import org.apache.streams.twitter.provider.TwitterConfigurator;
import org.apache.streams.twitter.provider.TwitterTimelineProvider;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Retrieves as many posts from a known list of users as twitter API allows.
 *
 * Converts them to activities, and writes them in activity format to Elasticsearch.
 */

public class TwitterHistoryElasticsearch implements Runnable {

    public final static String STREAMS_ID = "TwitterHistoryElasticsearch";

    private final static Logger LOGGER = LoggerFactory.getLogger(TwitterHistoryElasticsearch.class);

    private static final ObjectMapper mapper = new ObjectMapper();

    TwitterHistoryElasticsearchConfiguration config;

    public TwitterHistoryElasticsearch() {
        this(new ComponentConfigurator<>(TwitterHistoryElasticsearchConfiguration.class).detectConfiguration(StreamsConfigurator.getConfig()));

    }

    public TwitterHistoryElasticsearch(TwitterHistoryElasticsearchConfiguration config) {
        this.config = config;
    }

    public static void main(String[] args)
    {
        LOGGER.info(StreamsConfigurator.config.toString());

        TwitterHistoryElasticsearch history = new TwitterHistoryElasticsearch();

        new Thread(history).start();

    }


    public void run() {

        TwitterTimelineProvider provider = new TwitterTimelineProvider(config.getTwitter(), ObjectNode.class);
        ActivityConverterProcessor converter = new ActivityConverterProcessor();
        ElasticsearchPersistWriter writer = new ElasticsearchPersistWriter(config.getElasticsearch());

        StreamBuilder builder = new LocalStreamBuilder(500);

        builder.newPerpetualStream("provider", provider);
        builder.addStreamsProcessor("converter", converter, 2, "provider");
        builder.addStreamsPersistWriter("writer", writer, 1, "converter");
        builder.start();
    }
}