wip mod dependencies, improve mod loading (reuse threads), rename StaticConfiguration.homeDir to HOME_DIR, remove old code

doc/Modding.md

@@ -12,6 +12,7 @@ In the root folder of your jar file (the mod) must be a file called `mod.json`.
     "Example dev"
   ],
   "name": "Example Mod",
+  "moddingAPIVersion": 1,
   "identifier": "example",
   "mainClass": "de.example.mod.Main",
   "loading": {
@@ -43,7 +44,8 @@ In the root folder of your jar file (the mod) must be a file called `mod.json`.
 - `uuid` is a unique id for the mod. Generate 1 and keep it in all versions (used for dependencies, etc). **Required**
 - `versionId` like in android there is a numeric version id. It is used to compare between versions (and as identifier). **Required**
 - `versionName`, `authors`, `name` is the classic implementation of metadata. Can be anything, will be displayed in the mod list. **Required**
-- `identifier` is the prefix of items (for Minecraft it is `minecraft`). Aka the thing before the ``.  **Required**
+- `moddingAPIVersion` Modding API version of minosoft. Currently `1` **Required**
+- `identifier` is the prefix of items (for Minecraft it is `minecraft`). Aka the thing before the `:`.  **Required**
 - `mainClass` the Main class of your mod (self explaining). The main class needs to extent the abstract class `MinosoftMod`. **Required**
 - `loading` Loading attributes. **Optional**
   - `priority` should the mod be loaded at the beginning or at the end. Possible values are `LOWEST`, `LOW`, `NORMAL`, `HIGH`, `HIGHEST` **Optional**
@@ -52,8 +54,8 @@ In the root folder of your jar file (the mod) must be a file called `mod.json`.
   - `soft` These mods are **optional** to work. Both use the following format: **Optional**
     - `uuid` the uuid of the mod to load. **Required**
     - `version` Specifies the version you need to load. **Optional**
-      - `minimum` Minimum versionId required. **Maximum, minimum or both**
-      - `maximum` Maximum versionId required. **Maximum, minimum or both**
+      - `minimum` Minimum versionId required. **Maximum, minimum, both or none**
+      - `maximum` Maximum versionId required. **Maximum, minimum, both or none**
 
 ## Mod loading (aka Main class)
 Your main class must extend the following class: `de.bixilon.minosoft.MinosoftMod`.

src/main/java/de/bixilon/minosoft/config/Configuration.java

@@ -33,19 +33,19 @@ public class Configuration {
     private final Object lock = new Object();
 
     public Configuration() throws IOException {
-        File file = new File(StaticConfiguration.homeDir + "config/" + StaticConfiguration.CONFIG_FILENAME);
+        File file = new File(StaticConfiguration.HOME_DIR + "config/" + StaticConfiguration.CONFIG_FILENAME);
         if (!file.exists()) {
             // no configuration file
             InputStream input = getClass().getResourceAsStream("/config/" + StaticConfiguration.CONFIG_FILENAME);
             if (input == null) {
                 throw new FileNotFoundException(String.format("[Config] Missing default config: %s!", StaticConfiguration.CONFIG_FILENAME));
             }
-            File folder = new File(StaticConfiguration.homeDir + "config/");
+            File folder = new File(StaticConfiguration.HOME_DIR + "config/");
             if (!folder.exists() && !folder.mkdirs()) {
                 throw new IOException("[Config] Could not create config folder!");
             }
             Files.copy(input, Paths.get(file.getAbsolutePath()));
-            file = new File(StaticConfiguration.homeDir + "config/" + StaticConfiguration.CONFIG_FILENAME);
+            file = new File(StaticConfiguration.HOME_DIR + "config/" + StaticConfiguration.CONFIG_FILENAME);
         }
         config = Util.readJsonFromFile(file.getAbsolutePath());
         int configVersion = getInt(ConfigurationPaths.CONFIG_VERSION);
@@ -67,7 +67,7 @@ public class Configuration {
                     }
                 }
                 // write config to temp file, delete original config, rename temp file to original file to avoid conflicts if minosoft gets closed while saving the config
-                File tempFile = new File(StaticConfiguration.homeDir + "config/" + StaticConfiguration.CONFIG_FILENAME + ".tmp");
+                File tempFile = new File(StaticConfiguration.HOME_DIR + "config/" + StaticConfiguration.CONFIG_FILENAME + ".tmp");
                 Gson gson = new GsonBuilder().setPrettyPrinting().create();
                 FileWriter writer;
                 try {

src/main/java/de/bixilon/minosoft/config/StaticConfiguration.java

@@ -23,10 +23,11 @@ public class StaticConfiguration {
     public static final boolean COLORED_LOG = true; // the log should be colored with ANSI (does not affect base components)
     public static final boolean LOG_RELATIVE_TIME = false; // prefix all log messages with the relative start time in milliseconds instead of the formatted time
 
-    public static String homeDir;
+    public static final String HOME_DIR;
 
     static {
         // Sets Config.homeDir to the correct folder per OS
+        String homeDir;
         homeDir = System.getProperty("user.home");
         if (!homeDir.endsWith(File.separator)) {
             homeDir += "/";
@@ -42,5 +43,6 @@ public class StaticConfiguration {
             // failed creating folder
             throw new RuntimeException(String.format("Could not create home folder (%s)!", homeDir));
         }
+        HOME_DIR = folder.getAbsolutePath() + "/";
     }
 }

src/main/java/de/bixilon/minosoft/data/assets/AssetsManager.java

@@ -241,6 +241,6 @@ public class AssetsManager {
     }
 
     private static String getAssetDiskPath(String hash) {
-        return StaticConfiguration.homeDir + String.format("assets/objects/%s/%s.gz", hash.substring(0, 2), hash);
+        return StaticConfiguration.HOME_DIR + String.format("assets/objects/%s/%s.gz", hash.substring(0, 2), hash);
     }
 }

src/main/java/de/bixilon/minosoft/data/mappings/versions/Versions.java

@@ -128,7 +128,7 @@ public class Versions {
         long startTime = System.currentTimeMillis();
 
         // check if mapping folder exist
-        File mappingFolder = new File(StaticConfiguration.homeDir + "assets/mapping");
+        File mappingFolder = new File(StaticConfiguration.HOME_DIR + "assets/mapping");
         if (!mappingFolder.exists()) {
             if (mappingFolder.mkdirs()) {
                 Log.verbose("Created mappings folder.");
@@ -138,7 +138,7 @@ public class Versions {
             }
         }
 
-        String fileName = StaticConfiguration.homeDir + String.format("assets/mapping/%s.tar.gz", version.getVersionName());
+        String fileName = StaticConfiguration.HOME_DIR + String.format("assets/mapping/%s.tar.gz", version.getVersionName());
         HashMap<String, JsonObject> files;
         try {
             files = Util.readJsonTarGzFile(fileName);

src/main/java/de/bixilon/minosoft/modding/loading/ModDependency.java

@@ -0,0 +1,110 @@
+/*
+ * Minosoft
+ * Copyright (C) 2020 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ *  This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+package de.bixilon.minosoft.modding.loading;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonObject;
+import de.bixilon.minosoft.util.Util;
+
+import java.util.HashSet;
+import java.util.UUID;
+
+public class ModDependency {
+
+    private final UUID uuid;
+    private Integer versionMinimum;
+    private Integer versionMaximum;
+
+    public ModDependency(UUID uuid, Integer versionMinimum, Integer versionMaximum) {
+        this.uuid = uuid;
+        this.versionMinimum = versionMinimum;
+        this.versionMaximum = versionMaximum;
+    }
+
+    public ModDependency(UUID uuid) {
+        this.uuid = uuid;
+    }
+
+    public static ModDependency serialize(JsonObject json) {
+        UUID uuid = Util.getUUIDFromString(json.get("uuid").getAsString());
+        Integer versionMinimum = null;
+        Integer versionMaximum = null;
+
+        if (json.has("version")) {
+            JsonObject version = json.getAsJsonObject("version");
+            if (version.has("minimum")) {
+                versionMinimum = version.get("minimum").getAsInt();
+            }
+            if (version.has("maximum")) {
+                versionMaximum = version.get("maximum").getAsInt();
+            }
+        }
+        return new ModDependency(uuid, versionMinimum, versionMaximum);
+    }
+
+    public static HashSet<ModDependency> serializeDependencyArray(JsonArray json) {
+        HashSet<ModDependency> result = new HashSet<>();
+        json.forEach((jsonElement -> result.add(serialize(jsonElement.getAsJsonObject()))));
+        return result;
+    }
+
+    public UUID getUUID() {
+        return uuid;
+    }
+
+    public Integer getVersionMinimum() {
+        return versionMinimum;
+    }
+
+    public Integer getVersionMaximum() {
+        return versionMaximum;
+    }
+
+    @Override
+    public int hashCode() {
+        int result = uuid.hashCode();
+        if (versionMinimum != null && versionMinimum > 0) {
+            result *= versionMinimum;
+        }
+
+        if (versionMaximum != null && versionMaximum > 0) {
+            result *= versionMaximum;
+        }
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (super.equals(obj)) {
+            return true;
+        }
+        if (hashCode() != obj.hashCode()) {
+            return false;
+        }
+        ModDependency their = (ModDependency) obj;
+        return getUUID().equals(their.getUUID()) && getVersionMaximum().equals(their.getVersionMaximum()) && getVersionMinimum().equals(their.getVersionMinimum());
+    }
+
+    @Override
+    public String toString() {
+        String result = uuid.toString();
+        if (versionMinimum != null) {
+            result += " >" + versionMinimum;
+        }
+        if (versionMaximum != null) {
+            result += " <" + versionMaximum;
+        }
+        return result;
+    }
+}

src/main/java/de/bixilon/minosoft/modding/loading/ModInfo.java

@@ -17,6 +17,7 @@ import com.google.gson.JsonArray;
 import com.google.gson.JsonObject;
 import de.bixilon.minosoft.util.Util;
 
+import java.util.HashSet;
 import java.util.UUID;
 import java.util.concurrent.atomic.AtomicInteger;
 
@@ -26,11 +27,14 @@ public class ModInfo {
     final String versionName;
     final String name;
     final String[] authors;
+    final int moddingAPIVersion;
     final String identifier;
     final String mainClass;
+    final HashSet<ModDependency> hardDependencies = new HashSet<>();
+    final HashSet<ModDependency> softDependencies = new HashSet<>();
     LoadingInfo loadingInfo;
 
-    public ModInfo(JsonObject json) {
+    public ModInfo(JsonObject json) throws ModLoadingException {
         this.uuid = Util.getUUIDFromString(json.get("uuid").getAsString());
         this.versionId = json.get("versionId").getAsInt();
         this.versionName = json.get("versionName").getAsString();
@@ -39,6 +43,10 @@ public class ModInfo {
         this.authors = new String[authors.size()];
         AtomicInteger i = new AtomicInteger();
         authors.forEach((authorElement) -> this.authors[i.getAndIncrement()] = authorElement.getAsString());
+        moddingAPIVersion = json.get("moddingAPIVersion").getAsInt();
+        if (moddingAPIVersion > ModLoader.CURRENT_MODDING_API_VERSION) {
+            throw new ModLoadingException(String.format("Mod was written with for a newer version of minosoft (moddingAPIVersion=%d, expected=%d)", moddingAPIVersion, ModLoader.CURRENT_MODDING_API_VERSION));
+        }
         this.identifier = json.get("identifier").getAsString();
         this.mainClass = json.get("mainClass").getAsString();
         if (json.has("loading")) {
@@ -48,6 +56,15 @@ public class ModInfo {
                 this.loadingInfo.setLoadingPriority(Priorities.valueOf(loading.get("priority").getAsString()));
             }
         }
+        if (json.has("dependencies")) {
+            JsonObject dependencies = json.getAsJsonObject("dependencies");
+            if (dependencies.has("hard")) {
+                hardDependencies.addAll(ModDependency.serializeDependencyArray(dependencies.getAsJsonArray("hard")));
+            }
+            if (dependencies.has("soft")) {
+                softDependencies.addAll(ModDependency.serializeDependencyArray(dependencies.getAsJsonArray("soft")));
+            }
+        }
     }
 
     public String[] getAuthors() {

src/main/java/de/bixilon/minosoft/modding/loading/ModLoader.java

@@ -24,63 +24,78 @@ import org.xeustechnologies.jcl.JclObjectFactory;
 
 import java.io.File;
 import java.io.IOException;
-import java.util.HashSet;
 import java.util.LinkedList;
-import java.util.concurrent.Callable;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
 import java.util.zip.ZipFile;
 
 public class ModLoader {
-    static final LinkedList<MinosoftMod> mods = new LinkedList<>();
+    public static final int CURRENT_MODDING_API_VERSION = 1;
+    public static final LinkedList<MinosoftMod> mods = new LinkedList<>();
 
     public static void loadMods(CountUpAndDownLatch progress) throws Exception {
         Log.verbose("Start loading mods...");
+        ExecutorService executor = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors(), Util.getThreadFactory("ModLoader"));
+
         // load all jars, parse the mod.json
         // sort the list and prioritize
         // load all lists and dependencies async
-        HashSet<Callable<MinosoftMod>> callables = new HashSet<>();
-        File[] files = new File(StaticConfiguration.homeDir + "mods").listFiles();
+        File[] files = new File(StaticConfiguration.HOME_DIR + "mods").listFiles();
         if (files == null) {
             // no mods to load
             return;
         }
+        CountDownLatch latch = new CountDownLatch(files.length);
         for (File modFile : files) {
             if (modFile.isDirectory()) {
                 continue;
             }
-            callables.add(() -> {
+            executor.execute(() -> {
                 MinosoftMod mod = loadMod(progress, modFile);
                 if (mod != null) {
                     mods.add(mod);
                 }
-                return mod;
+                latch.countDown();
             });
         }
+        latch.await();
 
-        Util.executeInThreadPool("ModLoader", callables);
+        if (mods.size() == 0) {
+            Log.info("No mods to load.");
+            return;
+        }
 
         progress.addCount(mods.size() * ModPhases.values().length); // count * mod phases
 
+        // sort for priority
         mods.sort((a, b) -> {
             if (a == null || b == null) {
                 return 0;
             }
             return -(getLoadingPriorityOrDefault(b.getInfo()).ordinal() - getLoadingPriorityOrDefault(a.getInfo()).ordinal());
         });
+        // ToDo: check dependencies
+
         for (ModPhases phase : ModPhases.values()) {
             Log.verbose(String.format("Map loading phase changed: %s", phase));
-            HashSet<Callable<MinosoftMod>> phaseLoaderCallables = new HashSet<>();
-            mods.forEach((instance) -> phaseLoaderCallables.add(() -> {
-                if (!instance.isEnabled()) {
-                    return instance;
-                }
-                if (!instance.start(phase)) {
-                    Log.warn(String.format("An error occurred while loading %s", instance.getInfo()));
-                    instance.setEnabled(false);
-                }
-                progress.countDown();
-                return instance;
-            }));
-            Util.executeInThreadPool("ModLoader", phaseLoaderCallables);
+            CountDownLatch modLatch = new CountDownLatch(mods.size());
+            mods.forEach((instance) -> {
+                executor.execute(() -> {
+                    if (!instance.isEnabled()) {
+                        modLatch.countDown();
+                        progress.countDown();
+                        return;
+                    }
+                    if (!instance.start(phase)) {
+                        Log.warn(String.format("An error occurred while loading %s", instance.getInfo()));
+                        instance.setEnabled(false);
+                    }
+                    modLatch.countDown();
+                    progress.countDown();
+                });
+            });
+            modLatch.await();
         }
         mods.forEach((instance) -> {
             if (instance.isEnabled()) {
@@ -94,6 +109,7 @@ public class ModLoader {
     }
 
     public static MinosoftMod loadMod(CountUpAndDownLatch progress, File file) {
+        MinosoftMod instance;
         try {
             Log.verbose(String.format("[MOD] Loading file %s", file.getAbsolutePath()));
             progress.countUp();
@@ -107,18 +123,17 @@ public class ModLoader {
             jcl.add(file.getAbsolutePath());
             JclObjectFactory factory = JclObjectFactory.getInstance();
 
-            MinosoftMod instance = (MinosoftMod) factory.create(jcl, modInfo.getMainClass());
+            instance = (MinosoftMod) factory.create(jcl, modInfo.getMainClass());
             instance.setInfo(modInfo);
             Log.verbose(String.format("[MOD] Mod file loaded and added to classpath (%s)", modInfo));
             zipFile.close();
-            progress.countDown();
-            return instance;
-        } catch (IOException e) {
+        } catch (IOException | ModLoadingException | NullPointerException e) {
+            instance = null;
             e.printStackTrace();
             Log.warn(String.format("Could not load mod: %s", file.getAbsolutePath()));
         }
         progress.countDown(); // failed
-        return null;
+        return instance;
     }
 
     private static Priorities getLoadingPriorityOrDefault(ModInfo info) {

src/main/java/de/bixilon/minosoft/modding/loading/ModLoadingException.java

@@ -0,0 +1,35 @@
+/*
+ * Minosoft
+ * Copyright (C) 2020 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ *  This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+package de.bixilon.minosoft.modding.loading;
+
+public class ModLoadingException extends Exception {
+    public ModLoadingException() {
+    }
+
+    public ModLoadingException(String message) {
+        super(message);
+    }
+
+    public ModLoadingException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    public ModLoadingException(Throwable cause) {
+        super(cause);
+    }
+
+    public ModLoadingException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
+        super(message, cause, enableSuppression, writableStackTrace);
+    }
+}

src/main/java/de/bixilon/minosoft/util/Util.java

@@ -26,10 +26,9 @@ import java.net.URL;
 import java.nio.charset.StandardCharsets;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
-import java.util.Collection;
 import java.util.HashMap;
 import java.util.UUID;
-import java.util.concurrent.*;
+import java.util.concurrent.ThreadFactory;
 import java.util.regex.Pattern;
 import java.util.zip.*;
 
@@ -246,17 +245,6 @@ public final class Util {
         return new BufferedInputStream(new URL(url).openStream());
     }
 
-    public static <T> void executeInThreadPool(String name, Collection<Callable<T>> callables) throws InterruptedException {
-        ExecutorService phaseLoader = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors(), getThreadFactory(name));
-        phaseLoader.invokeAll(callables).forEach((tFuture -> {
-            try {
-                tFuture.get();
-            } catch (ExecutionException | InterruptedException ex) {
-                ex.getCause().printStackTrace();
-            }
-        }));
-    }
-
     public static ThreadFactory getThreadFactory(String threadName) {
         return new ThreadFactoryBuilder().setNameFormat(threadName + "#%d").build();
     }