de.dentrassi.pm.usage.Pinger.java Source code

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Here is the source code for de.dentrassi.pm.usage.Pinger.java

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/*******************************************************************************
 * Copyright (c) 2015 IBH SYSTEMS GmbH.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBH SYSTEMS GmbH - initial API and implementation
 *******************************************************************************/
package de.dentrassi.pm.usage;

import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.nio.charset.StandardCharsets;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.io.CharStreams;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

import de.dentrassi.pm.VersionInformation;

public class Pinger extends Thread {
    private final static Logger logger = LoggerFactory.getLogger(Pinger.class);

    private final static String PING_URL = "http://packagedrone.org/stats/";

    private final static URL URL;

    static {
        URL url = null;
        try {
            url = new URL(PING_URL);
        } catch (final MalformedURLException e) {
        }
        URL = url;
    }

    private final Statistics statistics;

    public Pinger(final Statistics statistics) {
        this.statistics = statistics;

        setDaemon(true);
        setName("Pinger");
        setPriority(Thread.MIN_PRIORITY);
    }

    @Override
    public void run() {
        if (URL == null) {
            logger.info("Trouble parsing ping URL: {}", PING_URL);
            return;
        }

        final long start = System.currentTimeMillis();
        logger.debug("Starting ping");
        try {
            performPing(this.statistics);
        } catch (final Exception e) {
            logger.info("Failed to ping", e);
        } finally {
            logger.debug("Ended ping after {} ms", System.currentTimeMillis() - start);
        }
    }

    protected static void performPing(final Statistics statistics) throws Exception {
        final URLConnection con = URL.openConnection();

        con.setDoOutput(true);
        con.setUseCaches(false);

        logger.debug("Connection: {}", con);

        if (con instanceof HttpURLConnection) {
            ((HttpURLConnection) con).setRequestMethod("POST");
            ((HttpURLConnection) con).setInstanceFollowRedirects(false);
        }

        con.setRequestProperty("Content-type", "text/json");
        con.setRequestProperty("User-agent", VersionInformation.USER_AGENT);

        try (OutputStream out = con.getOutputStream()) {
            final GsonBuilder gb = new GsonBuilder();
            final Gson g = gb.create();
            final OutputStreamWriter writer = new OutputStreamWriter(out, StandardCharsets.UTF_8);
            g.toJson(statistics, writer);
            writer.flush();
        }

        try (InputStream in = con.getInputStream()) {
            final String result = CharStreams.toString(new InputStreamReader(in, StandardCharsets.UTF_8));
            logger.debug("Ping result: {}", result);
        }
    }

}