uk.co.flax.ukmp.Indexer.java Source code

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Here is the source code for uk.co.flax.ukmp.Indexer.java

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/**
 * Copyright (c) 2014 Lemur Consulting Ltd.
 * <p/>
 * 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
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * 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 uk.co.flax.ukmp;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;

import org.yaml.snakeyaml.Yaml;

import twitter4j.conf.Configuration;
import twitter4j.conf.PropertyConfiguration;
import uk.co.flax.ukmp.twitter.PartyListHandler;

/**
 * @author Matt Pearce
 */
public class Indexer {

    private final IndexerConfiguration config;
    private final Configuration twitterConfig;

    public Indexer(String configFile) throws Exception {
        // Read the configuration details
        config = readConfiguration(configFile);
        twitterConfig = readTwitterConfiguration(config.getAuthenticationFile());
    }

    private IndexerConfiguration readConfiguration(String configFile) throws IOException {
        IndexerConfiguration ret = null;
        BufferedReader br = null;

        try {
            Yaml yaml = new Yaml();
            br = new BufferedReader(new FileReader(configFile));
            ret = yaml.loadAs(br, IndexerConfiguration.class);
        } finally {
            if (br != null) {
                br.close();
            }
        }

        return ret;
    }

    private Configuration readTwitterConfiguration(String twitterConfigFile) throws IOException {
        Configuration twitterConfig = null;
        InputStream is = null;

        try {
            is = new FileInputStream(config.getAuthenticationFile());
            twitterConfig = new PropertyConfiguration(is);
        } finally {
            if (is != null) {
                is.close();
            }
        }

        return twitterConfig;
    }

    public void run() {
        PartyListHandler listHandler = new PartyListHandler(twitterConfig, config.getParties());
        listHandler.refreshLists();
    }

    public static void main(String[] args) {
        if (args.length != 1) {
            System.out.println("Usage:");
            System.out.println("  java Indexer <configFile>");
            System.exit(1);
        } else {
            try {
                new Indexer(args[0]).run();
            } catch (Exception e) {
                System.err.println("Exception caught from Indexer: " + e.getMessage());
                System.exit(1);
            }
        }
    }

}