Added metrics

ChunkBusterPlugin/src/main/java/codes/biscuit/chunkbuster/ChunkBuster.java

@@ -4,6 +4,7 @@
 import codes.biscuit.chunkbuster.events.OtherEvents;
 import codes.biscuit.chunkbuster.events.PlayerEvents;
 import codes.biscuit.chunkbuster.hooks.HookUtils;
+import codes.biscuit.chunkbuster.hooks.MetricsLite;
 import codes.biscuit.chunkbuster.utils.ConfigValues;
 import codes.biscuit.chunkbuster.utils.Utils;
 import org.bukkit.Bukkit;
@@ -25,6 +26,7 @@ public void onEnable() {
         ChunkBusterCommand chunkBusterCommand = new ChunkBusterCommand(this);
         getCommand("chunkbuster").setExecutor(chunkBusterCommand);
         getCommand("chunkbuster").setTabCompleter(chunkBusterCommand);
+        new MetricsLite(this);
     }
 
     public Utils getUtils() { return utils; }

ChunkBusterPlugin/src/main/java/codes/biscuit/chunkbuster/hooks/MetricsLite.java

@@ -0,0 +1,312 @@
+package codes.biscuit.chunkbuster.hooks;
+
+import org.bukkit.Bukkit;
+import org.bukkit.configuration.file.YamlConfiguration;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.RegisteredServiceProvider;
+import org.bukkit.plugin.ServicePriority;
+import org.json.simple.JSONArray;
+import org.json.simple.JSONObject;
+
+import javax.net.ssl.HttpsURLConnection;
+import java.io.*;
+import java.lang.reflect.InvocationTargetException;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.util.Timer;
+import java.util.TimerTask;
+import java.util.UUID;
+import java.util.logging.Level;
+import java.util.zip.GZIPOutputStream;
+
+/**
+ * bStats collects some data for plugin authors.
+ * <p>
+ * Check out https://bStats.org/ to learn more about bStats!
+ */
+@SuppressWarnings({"WeakerAccess", "unchecked", "unused"})
+public class MetricsLite {
+
+    // The version of this bStats class
+    public static final int B_STATS_VERSION = 1;
+
+    // The url to which the data is sent
+    private static final String URL = "https://bStats.org/submitData/bukkit";
+
+    // Is bStats enabled on this server?
+    private boolean enabled;
+
+    // Should failed requests be logged?
+    private static boolean logFailedRequests;
+
+    // Should the sent data be logged?
+    private static boolean logSentData;
+
+    // Should the response text be logged?
+    private static boolean logResponseStatusText;
+
+    // The uuid of the server
+    private static String serverUUID;
+
+    // The plugin
+    private final Plugin plugin;
+
+    /**
+     * Class constructor.
+     *
+     * @param plugin The plugin which stats should be submitted.
+     */
+    public MetricsLite(Plugin plugin) {
+        if (plugin == null) {
+            throw new IllegalArgumentException("Plugin cannot be null!");
+        }
+        this.plugin = plugin;
+
+        // Get the config file
+        File bStatsFolder = new File(plugin.getDataFolder().getParentFile(), "bStats");
+        File configFile = new File(bStatsFolder, "config.yml");
+        YamlConfiguration config = YamlConfiguration.loadConfiguration(configFile);
+
+        // Check if the config file exists
+        if (!config.isSet("serverUuid")) {
+
+            // Add default values
+            config.addDefault("enabled", true);
+            // Every server gets it's unique random id.
+            config.addDefault("serverUuid", UUID.randomUUID().toString());
+            // Should failed request be logged?
+            config.addDefault("logFailedRequests", false);
+            // Should the sent data be logged?
+            config.addDefault("logSentData", false);
+            // Should the response text be logged?
+            config.addDefault("logResponseStatusText", false);
+
+            // Inform the server owners about bStats
+            config.options().header(
+                    "bStats collects some data for plugin authors like how many servers are using their plugins.\n" +
+                            "To honor their work, you should not disable it.\n" +
+                            "This has nearly no effect on the server performance!\n" +
+                            "Check out https://bStats.org/ to learn more :)"
+            ).copyDefaults(true);
+            try {
+                config.save(configFile);
+            } catch (IOException ignored) { }
+        }
+
+        // Load the data
+        serverUUID = config.getString("serverUuid");
+        logFailedRequests = config.getBoolean("logFailedRequests", false);
+        enabled = config.getBoolean("enabled", true);
+        if (enabled) {
+            boolean found = false;
+            // Search for all other bStats Metrics classes to see if we are the first one
+            for (Class<?> service : Bukkit.getServicesManager().getKnownServices()) {
+                try {
+                    service.getField("B_STATS_VERSION"); // Our identifier :)
+                    found = true; // We aren't the first
+                    break;
+                } catch (NoSuchFieldException ignored) { }
+            }
+            // Register our service
+            Bukkit.getServicesManager().register(MetricsLite.class, this, plugin, ServicePriority.Normal);
+            if (!found) {
+                // We are the first!
+                startSubmitting();
+            }
+        }
+    }
+
+    /**
+     * Checks if bStats is enabled.
+     *
+     * @return Whether bStats is enabled or not.
+     */
+    public boolean isEnabled() {
+        return enabled;
+    }
+
+    /**
+     * Starts the Scheduler which submits our data every 30 minutes.
+     */
+    private void startSubmitting() {
+        final Timer timer = new Timer(true); // We use a timer cause the Bukkit scheduler is affected by server lags
+        timer.scheduleAtFixedRate(new TimerTask() {
+            @Override
+            public void run() {
+                if (!plugin.isEnabled()) { // Plugin was disabled
+                    timer.cancel();
+                    return;
+                }
+                // Nevertheless we want our code to run in the Bukkit main thread, so we have to use the Bukkit scheduler
+                // Don't be afraid! The connection to the bStats server is still async, only the stats collection is sync ;)
+                Bukkit.getScheduler().runTask(plugin, () -> submitData());
+            }
+        }, 1000 * 60 * 5, 1000 * 60 * 30);
+        // Submit the data every 30 minutes, first time after 5 minutes to give other plugins enough time to start
+        // WARNING: Changing the frequency has no effect but your plugin WILL be blocked/deleted!
+        // WARNING: Just don't do it!
+    }
+
+    /**
+     * Gets the plugin specific data.
+     * This method is called using Reflection.
+     *
+     * @return The plugin specific data.
+     */
+    public JSONObject getPluginData() {
+        JSONObject data = new JSONObject();
+
+        String pluginName = plugin.getDescription().getName();
+        String pluginVersion = plugin.getDescription().getVersion();
+
+        data.put("pluginName", pluginName); // Append the name of the plugin
+        data.put("pluginVersion", pluginVersion); // Append the version of the plugin
+        JSONArray customCharts = new JSONArray();
+        data.put("customCharts", customCharts);
+
+        return data;
+    }
+
+    /**
+     * Gets the server specific data.
+     *
+     * @return The server specific data.
+     */
+    private JSONObject getServerData() {
+        // Minecraft specific data
+        int playerAmount = Bukkit.getOnlinePlayers().size();
+        int onlineMode = Bukkit.getOnlineMode() ? 1 : 0;
+        String bukkitVersion = Bukkit.getVersion();
+
+        // OS/Java specific data
+        String javaVersion = System.getProperty("java.version");
+        String osName = System.getProperty("os.name");
+        String osArch = System.getProperty("os.arch");
+        String osVersion = System.getProperty("os.version");
+        int coreCount = Runtime.getRuntime().availableProcessors();
+
+        JSONObject data = new JSONObject();
+
+        data.put("serverUUID", serverUUID);
+
+        data.put("playerAmount", playerAmount);
+        data.put("onlineMode", onlineMode);
+        data.put("bukkitVersion", bukkitVersion);
+
+        data.put("javaVersion", javaVersion);
+        data.put("osName", osName);
+        data.put("osArch", osArch);
+        data.put("osVersion", osVersion);
+        data.put("coreCount", coreCount);
+
+        return data;
+    }
+
+    /**
+     * Collects the data and sends it afterwards.
+     */
+    private void submitData() {
+        final JSONObject data = getServerData();
+
+        JSONArray pluginData = new JSONArray();
+        // Search for all other bStats Metrics classes to get their plugin data
+        for (Class<?> service : Bukkit.getServicesManager().getKnownServices()) {
+            try {
+                service.getField("B_STATS_VERSION"); // Our identifier :)
+
+                for (RegisteredServiceProvider<?> provider : Bukkit.getServicesManager().getRegistrations(service)) {
+                    try {
+                        pluginData.add(provider.getService().getMethod("getPluginData").invoke(provider.getProvider()));
+                    } catch (NullPointerException | NoSuchMethodException | IllegalAccessException | InvocationTargetException ignored) {
+                    }
+                }
+            } catch (NoSuchFieldException ignored) { }
+        }
+
+        data.put("plugins", pluginData);
+
+        // Create a new thread for the connection to the bStats server
+        new Thread(() -> {
+            try {
+                // Send the data
+                sendData(plugin, data);
+            } catch (Exception e) {
+                // Something went wrong! :(
+                if (logFailedRequests) {
+                    plugin.getLogger().log(Level.WARNING, "Could not submit plugin stats of " + plugin.getName(), e);
+                }
+            }
+        }).start();
+    }
+
+    /**
+     * Sends the data to the bStats server.
+     *
+     * @param plugin Any plugin. It's just used to get a logger instance.
+     * @param data The data to send.
+     * @throws Exception If the request failed.
+     */
+    private static void sendData(Plugin plugin, JSONObject data) throws Exception {
+        if (data == null) {
+            throw new IllegalArgumentException("Data cannot be null!");
+        }
+        if (Bukkit.isPrimaryThread()) {
+            throw new IllegalAccessException("This method must not be called from the main thread!");
+        }
+        if (logSentData) {
+            plugin.getLogger().info("Sending data to bStats: " + data.toString());
+        }
+        HttpsURLConnection connection = (HttpsURLConnection) new URL(URL).openConnection();
+
+        // Compress the data to save bandwidth
+        byte[] compressedData = compress(data.toString());
+
+        // Add headers
+        connection.setRequestMethod("POST");
+        connection.addRequestProperty("Accept", "application/json");
+        connection.addRequestProperty("Connection", "close");
+        connection.addRequestProperty("Content-Encoding", "gzip"); // We gzip our request
+        connection.addRequestProperty("Content-Length", String.valueOf(compressedData.length));
+        connection.setRequestProperty("Content-Type", "application/json"); // We send our data in JSON format
+        connection.setRequestProperty("User-Agent", "MC-Server/" + B_STATS_VERSION);
+
+        // Send data
+        connection.setDoOutput(true);
+        DataOutputStream outputStream = new DataOutputStream(connection.getOutputStream());
+        outputStream.write(compressedData);
+        outputStream.flush();
+        outputStream.close();
+
+        InputStream inputStream = connection.getInputStream();
+        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
+
+        StringBuilder builder = new StringBuilder();
+        String line;
+        while ((line = bufferedReader.readLine()) != null) {
+            builder.append(line);
+        }
+        bufferedReader.close();
+        if (logResponseStatusText) {
+            plugin.getLogger().info("Sent data to bStats and received response: " + builder.toString());
+        }
+    }
+
+    /**
+     * Gzips the given String.
+     *
+     * @param str The string to gzip.
+     * @return The gzipped String.
+     * @throws IOException If the compression failed.
+     */
+    private static byte[] compress(final String str) throws IOException {
+        if (str == null) {
+            return null;
+        }
+        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+        GZIPOutputStream gzip = new GZIPOutputStream(outputStream);
+        gzip.write(str.getBytes(StandardCharsets.UTF_8));
+        gzip.close();
+        return outputStream.toByteArray();
+    }
+
+}