Add Mojang status route

src/main/java/me/braydon/mc/common/MojangServer.java

@@ -0,0 +1,101 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2024 Braydon (Rainnny).
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package me.braydon.mc.common;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NonNull;
+import lombok.ToString;
+
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+
+/**
+ * Represents a service provided by Mojang.
+ *
+ * @author Braydon
+ */
+@AllArgsConstructor @Getter @ToString
+public enum MojangServer {
+    SESSION("https://sessionserver.mojang.com"),
+    API("https://api.mojang.com"),
+    TEXTURES("https://textures.minecraft.net"),
+    ASSETS("https://assets.mojang.com"),
+    LIBRARIES("https://libraries.minecraft.net");
+
+    private static final int STATUS_TIMEOUT = 7000;
+
+    /**
+     * The endpoint of this service.
+     */
+    @NonNull private final String endpoint;
+
+    /**
+     * Get the status of this service.
+     *
+     * @return the service status
+     */
+    @NonNull
+    public Status getStatus() {
+        try {
+            InetAddress address = InetAddress.getByName(endpoint.substring(8));
+            long before = System.currentTimeMillis();
+            if (address.isReachable(STATUS_TIMEOUT)) {
+                // The time it took to reach the host is 75% of
+                // the timeout, consider it to be degraded.
+                if ((System.currentTimeMillis() - before) > STATUS_TIMEOUT * 0.75D) {
+                    return Status.DEGRADED;
+                }
+                return Status.ONLINE;
+            }
+        } catch (UnknownHostException ex) {
+            ex.printStackTrace();
+        } catch (IOException ignored) {
+            // We can safely ignore any errors, we're simply checking
+            // if the host is reachable, if it's not, it's offline.
+        }
+        return Status.OFFLINE;
+    }
+
+    /**
+     * The status of a service.
+     */
+    public enum Status {
+        /**
+         * The service is online and accessible.
+         */
+        ONLINE,
+
+        /**
+         * The service is online, but is experiencing degraded performance.
+         */
+        DEGRADED,
+
+        /**
+         * The service is offline and inaccessible.
+         */
+        OFFLINE
+    }
+}

src/main/java/me/braydon/mc/controller/MojangController.java

@@ -0,0 +1,78 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2024 Braydon (Rainnny).
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package me.braydon.mc.controller;
+
+import io.swagger.v3.oas.annotations.tags.Tag;
+import lombok.NonNull;
+import lombok.extern.log4j.Log4j2;
+import me.braydon.mc.common.MojangServer;
+import me.braydon.mc.exception.impl.BadRequestException;
+import me.braydon.mc.service.MojangService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * The controller for handling
+ * Mojang related requests.
+ *
+ * @author Braydon
+ */
+@RestController
+@RequestMapping(value = "/mojang", produces = MediaType.APPLICATION_JSON_VALUE)
+@Log4j2(topic = "Mojang Controller")
+@Tag(name = "Mojang Controller", description = "The controller for handling Mojang related requests.")
+public final class MojangController {
+    /**
+     * The Mojang service to use.
+     */
+    @NonNull private final MojangService mojangService;
+
+    @Autowired
+    public MojangController(@NonNull MojangService mojangService) {
+        this.mojangService = mojangService;
+    }
+
+    /**
+     * A GET route to get the status of Mojang servers.
+     *
+     * @return the status response
+     */
+    @GetMapping("/status")
+    @ResponseBody
+    public ResponseEntity<Map<String, String>> getStatus() throws BadRequestException {
+        Map<String, String> response = new HashMap<>();
+        for (Map.Entry<MojangServer, MojangServer.Status> entry : mojangService.getMojangServerStatuses().entrySet()) {
+            response.put(entry.getKey().getEndpoint(), entry.getValue().name());
+        }
+        return ResponseEntity.ok(response);
+    }
+}

src/main/java/me/braydon/mc/controller/PlayerController.java

@@ -50,7 +50,7 @@ import org.springframework.web.bind.annotation.*;
 @Tag(name = "Player Controller", description = "The controller for handling player related requests.")
 public final class PlayerController {
     /**
-     * The Mojang service to use for player information.
+     * The Mojang service to use.
      */
     @NonNull private final MojangService mojangService;
 

src/main/java/me/braydon/mc/controller/ServerController.java

@@ -52,7 +52,7 @@ import java.util.Map;
 @Tag(name = "Server Controller", description = "The controller for handling server related requests.")
 public final class ServerController {
     /**
-     * The Mojang service to use for server information.
+     * The Mojang service to use.
      */
     @NonNull private final MojangService mojangService;
 

src/main/java/me/braydon/mc/service/MojangService.java

@@ -28,6 +28,7 @@ import com.google.common.base.Splitter;
 import com.google.common.collect.Lists;
 import com.google.common.hash.Hashing;
 import jakarta.annotation.PostConstruct;
+import lombok.Getter;
 import lombok.NonNull;
 import lombok.SneakyThrows;
 import lombok.extern.log4j.Log4j2;
@@ -77,11 +78,9 @@ import java.util.concurrent.TimeUnit;
 @Service
 @Log4j2(topic = "Mojang Service")
 public final class MojangService {
-    private static final String SESSION_SERVER_ENDPOINT = "https://sessionserver.mojang.com";
+    private static final String UUID_TO_PROFILE = MojangServer.SESSION.getEndpoint() + "/session/minecraft/profile/%s";
-    private static final String API_ENDPOINT = "https://api.mojang.com";
+    private static final String USERNAME_TO_UUID = MojangServer.API.getEndpoint() + "/users/profiles/minecraft/%s";
-    private static final String UUID_TO_PROFILE = SESSION_SERVER_ENDPOINT + "/session/minecraft/profile/%s";
+    private static final String FETCH_BLOCKED_SERVERS = MojangServer.SESSION.getEndpoint() + "/blockedservers";
-    private static final String USERNAME_TO_UUID = API_ENDPOINT + "/users/profiles/minecraft/%s";
-    private static final String FETCH_BLOCKED_SERVERS = SESSION_SERVER_ENDPOINT + "/blockedservers";
 
     private static final int DEFAULT_PART_TEXTURE_SIZE = 128;
     private static final int MAX_PART_TEXTURE_SIZE = 512;
@@ -102,7 +101,7 @@ public final class MojangService {
     @NonNull private final PlayerCacheRepository playerCache;
 
     /**
-     * The cache repository for {@link Skin.Part}'s.
+     * The cache repository for {@link ISkinPart}'s.
      */
     @NonNull private final SkinPartTextureCacheRepository skinPartTextureCache;
 
@@ -111,6 +110,11 @@ public final class MojangService {
      */
     @NonNull private final MinecraftServerCacheRepository minecraftServerCache;
 
+    /**
+     * Mapped statuses for {@link MojangServer}'s.
+     */
+    @Getter private final Map<MojangServer, MojangServer.Status> mojangServerStatuses = Collections.synchronizedMap(new HashMap<>());
+
     /**
      * A list of banned server hashes provided by Mojang.
      * <p>
@@ -140,6 +144,15 @@ public final class MojangService {
 
     @PostConstruct
     public void onInitialize() {
+        // Schedule a task to fetch statuses
+        // of Mojang servers every few minutes
+        new Timer().scheduleAtFixedRate(new TimerTask() {
+            @Override
+            public void run() {
+                fetchMojangServerStatuses();
+            }
+        }, 0L, 60L * 3L * 1000L);
+
         // Schedule a task to fetch blocked
         // servers from Mojang every 15 minutes.
         new Timer().scheduleAtFixedRate(new TimerTask() {
@@ -501,6 +514,22 @@ public final class MojangService {
         }
     }
 
+    /**
+     * Fetch the statuses of {@link MojangServer}'s.
+     */
+    @SneakyThrows
+    private void fetchMojangServerStatuses() {
+        log.info("Checking Mojang server statuses...");
+        long before = System.currentTimeMillis();
+        for (MojangServer server : MojangServer.values()) {
+            log.info("Pinging {}...", server.getEndpoint());
+            MojangServer.Status status = server.getStatus(); // Retrieve the server status
+            log.info("Retrieved status of {}: {}", server.getEndpoint(), status.name());
+            mojangServerStatuses.put(server, status); // Cache the server status
+        }
+        log.info("Mojang server status check took {}ms", System.currentTimeMillis() - before);
+    }
+
     /**
      * Fetch a list of blocked servers from Mojang.
      */