com.k42b3.quantum.worker.HttpWorkerAbstract.java Source code

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Here is the source code for com.k42b3.quantum.worker.HttpWorkerAbstract.java

Source

/**
 * Quantum is an aggregator service which collects messages from different 
 * sources and publish them through an REST API.
 * 
 * Copyright (c) 2014 Christoph Kappestein <k42b3.x@gmail.com>
 * 
 * This file is part of Quantum. Quantum is free software: you can 
 * redistribute it and/or modify it under the terms of the GNU 
 * General Public License as published by the Free Software Foundation, 
 * either version 3 of the License, or at any later version.
 * 
 * Quantum is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with Quantum. If not, see <http://www.gnu.org/licenses/>.
 */

package com.k42b3.quantum.worker;

import java.io.IOException;
import java.util.LinkedHashMap;
import java.util.Map;

import org.apache.http.client.HttpClient;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;

import com.k42b3.quantum.Queue;
import com.k42b3.quantum.Worker;
import com.k42b3.quantum.WorkerAbstract;

/**
 * HttpWorkerAbstract
 *
 * @author  Christoph Kappestein <k42b3.x@gmail.com>
 * @license http://www.gnu.org/licenses/gpl.html GPLv3
 * @link    https://github.com/k42b3/quantum
 */
abstract public class HttpWorkerAbstract extends WorkerAbstract {
    public HttpWorkerAbstract(Queue queue, Worker worker) {
        super(queue, worker);
    }

    public void run() {
        CloseableHttpClient httpClient = HttpClients.createDefault();

        try {
            this.fetch(httpClient);

            httpClient.close();
        } catch (Exception e) {
            logger.error(e.getMessage(), e);
        } finally {
            try {
                httpClient.close();
            } catch (IOException e) {
                logger.error(e.getMessage(), e);
            }
        }
    }

    public Map<String, String> getParameters() {
        LinkedHashMap<String, String> parameters = new LinkedHashMap<String, String>();
        parameters.put("url", "Url");

        return parameters;
    }

    /**
     * Method which makes an http requests an returns an list of new messages
     * 
     * @param httpClient
     */
    abstract protected void fetch(HttpClient httpClient);
}