Paper/patches/server/0018-Paper-Metrics.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Zach Brown <zach.brown@destroystokyo.com>
Date: Fri, 24 Mar 2017 23:56:01 -0500
Subject: [PATCH] Paper Metrics

Removes Spigot's mcstats metrics in favor of a system using bStats

To disable for privacy or other reasons go to the bStats folder in your plugins folder
and edit the config.yml file present there.

Please keep in mind the data collected is anonymous and collection should have no
tangible effect on server performance. The data is used to allow the authors of
PaperMC to track version and platform usage so that we can make better management
decisions on behalf of the project.

diff --git a/src/main/java/com/destroystokyo/paper/Metrics.java b/src/main/java/com/destroystokyo/paper/Metrics.java
new file mode 100644
index 0000000000000000000000000000000000000000..6aaed8e8bf8c721fc834da5c76ac72a4c3e92458
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/Metrics.java
@@ -0,0 +1,678 @@
+package com.destroystokyo.paper;
+
+import net.minecraft.server.MinecraftServer;
+import org.bukkit.Bukkit;
+import org.bukkit.configuration.file.YamlConfiguration;
+import org.bukkit.craftbukkit.util.CraftMagicNumbers;
+import org.bukkit.plugin.Plugin;
+
+import org.json.simple.JSONArray;
+import org.json.simple.JSONObject;
+
+import javax.net.ssl.HttpsURLConnection;
+import java.io.ByteArrayOutputStream;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.IOException;
+import java.net.URL;
+import java.util.*;
+import java.util.concurrent.Callable;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.util.zip.GZIPOutputStream;
+
+/**
+ * bStats collects some data for plugin authors.
+ *
+ * Check out https://bStats.org/ to learn more about bStats!
+ */
+public class Metrics {
+
+    // Executor service for requests
+    // We use an executor service because the Bukkit scheduler is affected by server lags
+    private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
+
+    // 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/server-implementation";
+
+    // Should failed requests be logged?
+    private static boolean logFailedRequests = false;
+
+    // The logger for the failed requests
+    private static Logger logger = Logger.getLogger("bStats");
+
+    // The name of the server software
+    private final String name;
+
+    // The uuid of the server
+    private final String serverUUID;
+
+    // A list with all custom charts
+    private final List<CustomChart> charts = new ArrayList<>();
+
+    /**
+     * Class constructor.
+     *
+     * @param name              The name of the server software.
+     * @param serverUUID        The uuid of the server.
+     * @param logFailedRequests Whether failed requests should be logged or not.
+     * @param logger            The logger for the failed requests.
+     */
+    public Metrics(String name, String serverUUID, boolean logFailedRequests, Logger logger) {
+        this.name = name;
+        this.serverUUID = serverUUID;
+        Metrics.logFailedRequests = logFailedRequests;
+        Metrics.logger = logger;
+
+        // Start submitting the data
+        startSubmitting();
+    }
+
+    /**
+     * Adds a custom chart.
+     *
+     * @param chart The chart to add.
+     */
+    public void addCustomChart(CustomChart chart) {
+        if (chart == null) {
+            throw new IllegalArgumentException("Chart cannot be null!");
+        }
+        charts.add(chart);
+    }
+
+    /**
+     * Starts the Scheduler which submits our data every 30 minutes.
+     */
+    private void startSubmitting() {
+        final Runnable submitTask = this::submitData;
+
+        // Many servers tend to restart at a fixed time at xx:00 which causes an uneven distribution of requests on the
+        // bStats backend. To circumvent this problem, we introduce some randomness into the initial and second delay.
+        // WARNING: You must not modify any part of this Metrics class, including the submit delay or frequency!
+        // WARNING: Modifying this code will get your plugin banned on bStats. Just don't do it!
+        long initialDelay = (long) (1000 * 60 * (3 + Math.random() * 3));
+        long secondDelay = (long) (1000 * 60 * (Math.random() * 30));
+        scheduler.schedule(submitTask, initialDelay, TimeUnit.MILLISECONDS);
+        scheduler.scheduleAtFixedRate(submitTask, initialDelay + secondDelay, 1000 * 60 * 30, TimeUnit.MILLISECONDS);
+    }
+
+    /**
+     * Gets the plugin specific data.
+     *
+     * @return The plugin specific data.
+     */
+    private JSONObject getPluginData() {
+        JSONObject data = new JSONObject();
+
+        data.put("pluginName", name); // Append the name of the server software
+        JSONArray customCharts = new JSONArray();
+        for (CustomChart customChart : charts) {
+            // Add the data of the custom charts
+            JSONObject chart = customChart.getRequestJsonObject();
+            if (chart == null) { // If the chart is null, we skip it
+                continue;
+            }
+            customCharts.add(chart);
+        }
+        data.put("customCharts", customCharts);
+
+        return data;
+    }
+
+    /**
+     * Gets the server specific data.
+     *
+     * @return The server specific data.
+     */
+    private JSONObject getServerData() {
+        // OS specific data
+        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("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();
+        pluginData.add(getPluginData());
+        data.put("plugins", pluginData);
+
+        try {
+            // We are still in the Thread of the timer, so nothing get blocked :)
+            sendData(data);
+        } catch (Exception e) {
+            // Something went wrong! :(
+            if (logFailedRequests) {
+                logger.log(Level.WARNING, "Could not submit stats of " + name, e);
+            }
+        }
+    }
+
+    /**
+     * Sends the data to the bStats server.
+     *
+     * @param data The data to send.
+     * @throws Exception If the request failed.
+     */
+    private static void sendData(JSONObject data) throws Exception {
+        if (data == null) {
+            throw new IllegalArgumentException("Data cannot be null!");
+        }
+        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();
+
+        connection.getInputStream().close(); // We don't care about the response - Just send our data :)
+    }
+
+    /**
+     * 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("UTF-8"));
+        gzip.close();
+        return outputStream.toByteArray();
+    }
+
+    /**
+     * Represents a custom chart.
+     */
+    public static abstract class CustomChart {
+
+        // The id of the chart
+        final String chartId;
+
+        /**
+         * Class constructor.
+         *
+         * @param chartId The id of the chart.
+         */
+        CustomChart(String chartId) {
+            if (chartId == null || chartId.isEmpty()) {
+                throw new IllegalArgumentException("ChartId cannot be null or empty!");
+            }
+            this.chartId = chartId;
+        }
+
+        private JSONObject getRequestJsonObject() {
+            JSONObject chart = new JSONObject();
+            chart.put("chartId", chartId);
+            try {
+                JSONObject data = getChartData();
+                if (data == null) {
+                    // If the data is null we don't send the chart.
+                    return null;
+                }
+                chart.put("data", data);
+            } catch (Throwable t) {
+                if (logFailedRequests) {
+                    logger.log(Level.WARNING, "Failed to get data for custom chart with id " + chartId, t);
+                }
+                return null;
+            }
+            return chart;
+        }
+
+        protected abstract JSONObject getChartData() throws Exception;
+
+    }
+
+    /**
+     * Represents a custom simple pie.
+     */
+    public static class SimplePie extends CustomChart {
+
+        private final Callable<String> callable;
+
+        /**
+         * Class constructor.
+         *
+         * @param chartId  The id of the chart.
+         * @param callable The callable which is used to request the chart data.
+         */
+        public SimplePie(String chartId, Callable<String> callable) {
+            super(chartId);
+            this.callable = callable;
+        }
+
+        @Override
+        protected JSONObject getChartData() throws Exception {
+            JSONObject data = new JSONObject();
+            String value = callable.call();
+            if (value == null || value.isEmpty()) {
+                // Null = skip the chart
+                return null;
+            }
+            data.put("value", value);
+            return data;
+        }
+    }
+
+    /**
+     * Represents a custom advanced pie.
+     */
+    public static class AdvancedPie extends CustomChart {
+
+        private final Callable<Map<String, Integer>> callable;
+
+        /**
+         * Class constructor.
+         *
+         * @param chartId  The id of the chart.
+         * @param callable The callable which is used to request the chart data.
+         */
+        public AdvancedPie(String chartId, Callable<Map<String, Integer>> callable) {
+            super(chartId);
+            this.callable = callable;
+        }
+
+        @Override
+        protected JSONObject getChartData() throws Exception {
+            JSONObject data = new JSONObject();
+            JSONObject values = new JSONObject();
+            Map<String, Integer> map = callable.call();
+            if (map == null || map.isEmpty()) {
+                // Null = skip the chart
+                return null;
+            }
+            boolean allSkipped = true;
+            for (Map.Entry<String, Integer> entry : map.entrySet()) {
+                if (entry.getValue() == 0) {
+                    continue; // Skip this invalid
+                }
+                allSkipped = false;
+                values.put(entry.getKey(), entry.getValue());
+            }
+            if (allSkipped) {
+                // Null = skip the chart
+                return null;
+            }
+            data.put("values", values);
+            return data;
+        }
+    }
+
+    /**
+     * Represents a custom drilldown pie.
+     */
+    public static class DrilldownPie extends CustomChart {
+
+        private final Callable<Map<String, Map<String, Integer>>> callable;
+
+        /**
+         * Class constructor.
+         *
+         * @param chartId  The id of the chart.
+         * @param callable The callable which is used to request the chart data.
+         */
+        public DrilldownPie(String chartId, Callable<Map<String, Map<String, Integer>>> callable) {
+            super(chartId);
+            this.callable = callable;
+        }
+
+        @Override
+        public JSONObject getChartData() throws Exception {
+            JSONObject data = new JSONObject();
+            JSONObject values = new JSONObject();
+            Map<String, Map<String, Integer>> map = callable.call();
+            if (map == null || map.isEmpty()) {
+                // Null = skip the chart
+                return null;
+            }
+            boolean reallyAllSkipped = true;
+            for (Map.Entry<String, Map<String, Integer>> entryValues : map.entrySet()) {
+                JSONObject value = new JSONObject();
+                boolean allSkipped = true;
+                for (Map.Entry<String, Integer> valueEntry : map.get(entryValues.getKey()).entrySet()) {
+                    value.put(valueEntry.getKey(), valueEntry.getValue());
+                    allSkipped = false;
+                }
+                if (!allSkipped) {
+                    reallyAllSkipped = false;
+                    values.put(entryValues.getKey(), value);
+                }
+            }
+            if (reallyAllSkipped) {
+                // Null = skip the chart
+                return null;
+            }
+            data.put("values", values);
+            return data;
+        }
+    }
+
+    /**
+     * Represents a custom single line chart.
+     */
+    public static class SingleLineChart extends CustomChart {
+
+        private final Callable<Integer> callable;
+
+        /**
+         * Class constructor.
+         *
+         * @param chartId  The id of the chart.
+         * @param callable The callable which is used to request the chart data.
+         */
+        public SingleLineChart(String chartId, Callable<Integer> callable) {
+            super(chartId);
+            this.callable = callable;
+        }
+
+        @Override
+        protected JSONObject getChartData() throws Exception {
+            JSONObject data = new JSONObject();
+            int value = callable.call();
+            if (value == 0) {
+                // Null = skip the chart
+                return null;
+            }
+            data.put("value", value);
+            return data;
+        }
+
+    }
+
+    /**
+     * Represents a custom multi line chart.
+     */
+    public static class MultiLineChart extends CustomChart {
+
+        private final Callable<Map<String, Integer>> callable;
+
+        /**
+         * Class constructor.
+         *
+         * @param chartId  The id of the chart.
+         * @param callable The callable which is used to request the chart data.
+         */
+        public MultiLineChart(String chartId, Callable<Map<String, Integer>> callable) {
+            super(chartId);
+            this.callable = callable;
+        }
+
+        @Override
+        protected JSONObject getChartData() throws Exception {
+            JSONObject data = new JSONObject();
+            JSONObject values = new JSONObject();
+            Map<String, Integer> map = callable.call();
+            if (map == null || map.isEmpty()) {
+                // Null = skip the chart
+                return null;
+            }
+            boolean allSkipped = true;
+            for (Map.Entry<String, Integer> entry : map.entrySet()) {
+                if (entry.getValue() == 0) {
+                    continue; // Skip this invalid
+                }
+                allSkipped = false;
+                values.put(entry.getKey(), entry.getValue());
+            }
+            if (allSkipped) {
+                // Null = skip the chart
+                return null;
+            }
+            data.put("values", values);
+            return data;
+        }
+
+    }
+
+    /**
+     * Represents a custom simple bar chart.
+     */
+    public static class SimpleBarChart extends CustomChart {
+
+        private final Callable<Map<String, Integer>> callable;
+
+        /**
+         * Class constructor.
+         *
+         * @param chartId  The id of the chart.
+         * @param callable The callable which is used to request the chart data.
+         */
+        public SimpleBarChart(String chartId, Callable<Map<String, Integer>> callable) {
+            super(chartId);
+            this.callable = callable;
+        }
+
+        @Override
+        protected JSONObject getChartData() throws Exception {
+            JSONObject data = new JSONObject();
+            JSONObject values = new JSONObject();
+            Map<String, Integer> map = callable.call();
+            if (map == null || map.isEmpty()) {
+                // Null = skip the chart
+                return null;
+            }
+            for (Map.Entry<String, Integer> entry : map.entrySet()) {
+                JSONArray categoryValues = new JSONArray();
+                categoryValues.add(entry.getValue());
+                values.put(entry.getKey(), categoryValues);
+            }
+            data.put("values", values);
+            return data;
+        }
+
+    }
+
+    /**
+     * Represents a custom advanced bar chart.
+     */
+    public static class AdvancedBarChart extends CustomChart {
+
+        private final Callable<Map<String, int[]>> callable;
+
+        /**
+         * Class constructor.
+         *
+         * @param chartId  The id of the chart.
+         * @param callable The callable which is used to request the chart data.
+         */
+        public AdvancedBarChart(String chartId, Callable<Map<String, int[]>> callable) {
+            super(chartId);
+            this.callable = callable;
+        }
+
+        @Override
+        protected JSONObject getChartData() throws Exception {
+            JSONObject data = new JSONObject();
+            JSONObject values = new JSONObject();
+            Map<String, int[]> map = callable.call();
+            if (map == null || map.isEmpty()) {
+                // Null = skip the chart
+                return null;
+            }
+            boolean allSkipped = true;
+            for (Map.Entry<String, int[]> entry : map.entrySet()) {
+                if (entry.getValue().length == 0) {
+                    continue; // Skip this invalid
+                }
+                allSkipped = false;
+                JSONArray categoryValues = new JSONArray();
+                for (int categoryValue : entry.getValue()) {
+                    categoryValues.add(categoryValue);
+                }
+                values.put(entry.getKey(), categoryValues);
+            }
+            if (allSkipped) {
+                // Null = skip the chart
+                return null;
+            }
+            data.put("values", values);
+            return data;
+        }
+
+    }
+
+    public static class PaperMetrics {
+        public static void startMetrics() {
+            // Get the config file
+            File configFile = new File(new File((File) MinecraftServer.getServer().options.valueOf("plugins"), "bStats"), "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);
+
+                // 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
+            String serverUUID = config.getString("serverUuid");
+            boolean logFailedRequests = config.getBoolean("logFailedRequests", false);
+            // Only start Metrics, if it's enabled in the config
+            if (config.getBoolean("enabled", true)) {
+                Metrics metrics = new Metrics("Paper", serverUUID, logFailedRequests, Bukkit.getLogger());
+
+                metrics.addCustomChart(new Metrics.SimplePie("minecraft_version", () -> {
+                    String minecraftVersion = Bukkit.getVersion();
+                    minecraftVersion = minecraftVersion.substring(minecraftVersion.indexOf("MC: ") + 4, minecraftVersion.length() - 1);
+                    return minecraftVersion;
+                }));
+
+                metrics.addCustomChart(new Metrics.SingleLineChart("players", () -> Bukkit.getOnlinePlayers().size()));
+                metrics.addCustomChart(new Metrics.SimplePie("online_mode", () -> Bukkit.getOnlineMode() ? "online" : "offline"));
+                final String paperVersion;
+                final String implVersion = org.bukkit.craftbukkit.Main.class.getPackage().getImplementationVersion();
+                if (implVersion != null) {
+                    final String buildOrHash = implVersion.substring(implVersion.lastIndexOf('-') + 1);
+                    paperVersion = "git-Paper-%s-%s".formatted(Bukkit.getServer().getMinecraftVersion(), buildOrHash);
+                } else {
+                    paperVersion = "unknown";
+                }
+                metrics.addCustomChart(new Metrics.SimplePie("paper_version", () -> paperVersion));
+
+                metrics.addCustomChart(new Metrics.DrilldownPie("java_version", () -> {
+                    Map<String, Map<String, Integer>> map = new HashMap<>();
+                    String javaVersion = System.getProperty("java.version");
+                    Map<String, Integer> entry = new HashMap<>();
+                    entry.put(javaVersion, 1);
+
+                    // http://openjdk.java.net/jeps/223
+                    // Java decided to change their versioning scheme and in doing so modified the java.version system
+                    // property to return $major[.$minor][.$secuity][-ea], as opposed to 1.$major.0_$identifier
+                    // we can handle pre-9 by checking if the "major" is equal to "1", otherwise, 9+
+                    String majorVersion = javaVersion.split("\\.")[0];
+                    String release;
+
+                    int indexOf = javaVersion.lastIndexOf('.');
+
+                    if (majorVersion.equals("1")) {
+                        release = "Java " + javaVersion.substring(0, indexOf);
+                    } else {
+                        // of course, it really wouldn't be all that simple if they didn't add a quirk, now would it
+                        // valid strings for the major may potentially include values such as -ea to deannotate a pre release
+                        Matcher versionMatcher = Pattern.compile("\\d+").matcher(majorVersion);
+                        if (versionMatcher.find()) {
+                            majorVersion = versionMatcher.group(0);
+                        }
+                        release = "Java " + majorVersion;
+                    }
+                    map.put(release, entry);
+
+                    return map;
+                }));
+
+                metrics.addCustomChart(new Metrics.DrilldownPie("legacy_plugins", () -> {
+                    Map<String, Map<String, Integer>> map = new HashMap<>();
+
+                    // count legacy plugins
+                    int legacy = 0;
+                    for (Plugin plugin : Bukkit.getPluginManager().getPlugins()) {
+                        if (CraftMagicNumbers.isLegacy(plugin.getDescription())) {
+                            legacy++;
+                        }
+                    }
+
+                    // insert real value as lower dimension
+                    Map<String, Integer> entry = new HashMap<>();
+                    entry.put(String.valueOf(legacy), 1);
+
+                    // create buckets as higher dimension
+                    if (legacy == 0) {
+                        map.put("0 \uD83D\uDE0E", entry); // :sunglasses:
+                    } else if (legacy <= 5) {
+                        map.put("1-5", entry);
+                    } else if (legacy <= 10) {
+                        map.put("6-10", entry);
+                    } else if (legacy <= 25) {
+                        map.put("11-25", entry);
+                    } else if (legacy <= 50) {
+                        map.put("26-50", entry);
+                    } else {
+                        map.put("50+ \uD83D\uDE2D", entry); // :cry:
+                    }
+
+                    return map;
+                }));
+            }
+
+        }
+    }
+}
diff --git a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
index b9c22f725f5aeaee469fe5b7d8c3a57ddb1d5bdd..0d6688e9da81453e64daacfb81e4a13cc37b3e66 100644
--- a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
+++ b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
@@ -212,6 +212,7 @@ public class DedicatedServer extends MinecraftServer implements ServerInterface
         this.paperConfigurations.initializeWorldDefaultsConfiguration(this.registryAccess());
         // Paper end - initialize global and world-defaults configuration
         io.papermc.paper.command.PaperCommands.registerCommands(this); // Paper - setup /paper command
+        com.destroystokyo.paper.Metrics.PaperMetrics.startMetrics(); // Paper - start metrics
 
         this.setPvpAllowed(dedicatedserverproperties.pvp);
         this.setFlightAllowed(dedicatedserverproperties.allowFlight);
diff --git a/src/main/java/org/spigotmc/SpigotConfig.java b/src/main/java/org/spigotmc/SpigotConfig.java
index 899e85ea70edfb6553dc27462690da8caa793f77..27b01f7ed930baab466a5e4f9608e9e1a4da0978 100644
--- a/src/main/java/org/spigotmc/SpigotConfig.java
+++ b/src/main/java/org/spigotmc/SpigotConfig.java
@@ -83,6 +83,7 @@ public class SpigotConfig
             MinecraftServer.getServer().server.getCommandMap().register( entry.getKey(), "Spigot", entry.getValue() );
         }
 
+        /* // Paper - Replace with our own
         if ( SpigotConfig.metrics == null )
         {
             try
@@ -94,6 +95,7 @@ public class SpigotConfig
                 Bukkit.getServer().getLogger().log( Level.SEVERE, "Could not start metrics service", ex );
             }
         }
+        */ // Paper end
     }
 
     public static void readConfig(Class<?> clazz, Object instance) // Paper - package-private -> public