/
MetricsLite.java
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/
MetricsLite.java
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package org.bstats.bukkit;
import com.google.gson.JsonArray;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import org.bukkit.Bukkit;
import org.bukkit.configuration.file.YamlConfiguration;
import org.bukkit.entity.Player;
import org.bukkit.plugin.Plugin;
import org.bukkit.plugin.RegisteredServiceProvider;
import org.bukkit.plugin.ServicePriority;
import javax.net.ssl.HttpsURLConnection;
import java.io.*;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.util.Collection;
import java.util.Timer;
import java.util.TimerTask;
import java.util.UUID;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
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", "unused"})
public class MetricsLite {
static {
// You can use the property to disable the check in your test environment
if (System.getProperty("bstats.relocatecheck") == null || !System.getProperty("bstats.relocatecheck").equals("false")) {
// Maven's Relocate is clever and changes strings, too. So we have to use this little "trick" ... :D
final String defaultPackage = new String(
new byte[]{'o', 'r', 'g', '.', 'b', 's', 't', 'a', 't', 's', '.', 'b', 'u', 'k', 'k', 'i', 't'});
final String examplePackage = new String(new byte[]{'y', 'o', 'u', 'r', '.', 'p', 'a', 'c', 'k', 'a', 'g', 'e'});
// We want to make sure nobody just copy & pastes the example and use the wrong package names
if (MetricsLite.class.getPackage().getName().equals(defaultPackage) || MetricsLite.class.getPackage().getName().equals(examplePackage)) {
throw new IllegalStateException("bStats Metrics class has not been relocated correctly!");
}
}
}
// This ThreadFactory enforces the naming convention for our Threads
private final ThreadFactory threadFactory = task -> new Thread(task, "bStats-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, threadFactory);
// 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;
// The plugin id
private final int pluginId;
/**
* Class constructor.
*
* @param plugin The plugin which stats should be submitted.
* @param pluginId The id of the plugin.
* It can be found at <a href="https://bstats.org/what-is-my-plugin-id">What is my plugin id?</a>
*/
public MetricsLite(Plugin plugin, int pluginId) {
if (plugin == null) {
throw new IllegalArgumentException("Plugin cannot be null!");
}
this.plugin = plugin;
this.pluginId = pluginId;
// 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);
logSentData = config.getBoolean("logSentData", false);
logResponseStatusText = config.getBoolean("logResponseStatusText", false);
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 Runnable submitTask = () -> {
if (!plugin.isEnabled()) { // Plugin was disabled
scheduler.shutdown();
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, 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 and 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.
* 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.addProperty("pluginName", pluginName); // Append the name of the plugin
data.addProperty("id", pluginId); // Append the id of the plugin
data.addProperty("pluginVersion", pluginVersion); // Append the version of the plugin
data.add("customCharts", new JsonArray());
return data;
}
/**
* Gets the server specific data.
*
* @return The server specific data.
*/
private JsonObject getServerData() {
// Minecraft specific data
int playerAmount;
try {
// Around MC 1.8 the return type was changed to a collection from an array,
// This fixes java.lang.NoSuchMethodError: org.bukkit.Bukkit.getOnlinePlayers()Ljava/util/Collection;
Method onlinePlayersMethod = Class.forName("org.bukkit.Server").getMethod("getOnlinePlayers");
playerAmount = onlinePlayersMethod.getReturnType().equals(Collection.class)
? ((Collection<?>) onlinePlayersMethod.invoke(Bukkit.getServer())).size()
: ((Player[]) onlinePlayersMethod.invoke(Bukkit.getServer())).length;
} catch (Exception e) {
playerAmount = Bukkit.getOnlinePlayers().size(); // Just use the new method if the Reflection failed
}
int onlineMode = Bukkit.getOnlineMode() ? 1 : 0;
String bukkitVersion = Bukkit.getVersion();
String bukkitName = Bukkit.getName();
// 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.addProperty("serverUUID", serverUUID);
data.addProperty("playerAmount", playerAmount);
data.addProperty("onlineMode", onlineMode);
data.addProperty("bukkitVersion", bukkitVersion);
data.addProperty("bukkitName", bukkitName);
data.addProperty("javaVersion", javaVersion);
data.addProperty("osName", osName);
data.addProperty("osArch", osArch);
data.addProperty("osVersion", osVersion);
data.addProperty("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 {
Object plugin = provider.getService().getMethod("getPluginData").invoke(provider.getProvider());
if (plugin instanceof JsonObject) {
pluginData.add((JsonObject) plugin);
} else { // old bstats version compatibility
try {
Class<?> jsonObjectJsonSimple = Class.forName("org.json.simple.JSONObject");
if (plugin.getClass().isAssignableFrom(jsonObjectJsonSimple)) {
Method jsonStringGetter = jsonObjectJsonSimple.getDeclaredMethod("toJSONString");
jsonStringGetter.setAccessible(true);
String jsonString = (String) jsonStringGetter.invoke(plugin);
JsonObject object = new JsonParser().parse(jsonString).getAsJsonObject();
pluginData.add(object);
}
} catch (ClassNotFoundException e) {
// minecraft version 1.14+
if (logFailedRequests) {
this.plugin.getLogger().log(Level.SEVERE, "Encountered unexpected exception ", e);
}
}
}
} catch (NullPointerException | NoSuchMethodException | IllegalAccessException | InvocationTargetException ignored) {
}
}
} catch (NoSuchFieldException ignored) { }
}
data.add("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);
}
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);
try (DataOutputStream outputStream = new DataOutputStream(connection.getOutputStream())) {
outputStream.write(compressedData);
}
StringBuilder builder = new StringBuilder();
try (BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(connection.getInputStream()))) {
String line;
while ((line = bufferedReader.readLine()) != null) {
builder.append(line);
}
}
if (logResponseStatusText) {
plugin.getLogger().info("Sent data to bStats and received response: " + builder);
}
}
/**
* 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();
try(GZIPOutputStream gzip = new GZIPOutputStream(outputStream)) {
gzip.write(str.getBytes(StandardCharsets.UTF_8));
}
return outputStream.toByteArray();
}
}