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Merge branch 'master' into master

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JesFot 2020-11-20 02:12:02 +01:00 committed by GitHub
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44 changed files with 1448 additions and 336 deletions
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10
.github/workflows/tests.yml vendored
View File

@ -19,6 +19,16 @@ jobs:
java-version: 1.11
- name: Grant execute permission for gradlew
run: chmod +x gradlew
- name: Setup gradle cache
uses: burrunan/gradle-cache-action@v1
with:
save-generated-gradle-jars: false
save-local-build-cache: false
save-gradle-dependencies-cache: true
save-maven-dependencies-cache: true
# Ignore some of the paths when caching Maven Local repository
maven-local-ignore-paths: |
net/minestom/
- name: Build Minestom
run: ./gradlew build
- name: Run Minestom tests

2
.gitignore vendored
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@ -52,4 +52,4 @@ gradle-app.setting
/src/main/java/com/mcecraft/
# When running the demo we generate the extensions folder
extensions/
/extensions/

6
build.gradle
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@ -129,6 +129,8 @@ dependencies {
// SLF4J is the base logger for most libraries, therefore we can hook it into log4j2.
api 'org.apache.logging.log4j:log4j-slf4j-impl:2.14.0'
// Guava 21.0+ required for Mixin, but Authlib imports 17.0
api 'com.google.guava:guava:21.0'
api 'com.mojang:authlib:1.5.21'
// Code modification
@ -143,6 +145,8 @@ dependencies {
api 'com.github.MadMartian:hydrazine-path-finding:1.4.2'
api "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
// NBT parsing/manipulation/saving
api("com.github.jglrxavpok:Hephaistos:${project.hephaistos_version}")
api("com.github.jglrxavpok:Hephaistos:${project.hephaistos_version}:gson")
api("com.github.jglrxavpok:Hephaistos:${project.hephaistos_version}") {
@ -151,6 +155,8 @@ dependencies {
}
}
implementation "com.github.Minestom:DependencyGetter:v1.0.1"
// LWJGL, for map rendering
lwjglApi platform("org.lwjgl:lwjgl-bom:$lwjglVersion")

1
gradle/wrapper/gradle-wrapper.properties vendored
View File

@ -4,3 +4,4 @@ distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-all.zip
distributionSha256Sum=0f316a67b971b7b571dac7215dcf2591a30994b3450e0629925ffcfe2c68cc5c

10
src/main/java/net/minestom/server/Bootstrap.java
View File

@ -1,6 +1,6 @@
package net.minestom.server;
import net.minestom.server.extras.selfmodification.MinestomOverwriteClassLoader;
import net.minestom.server.extras.selfmodification.MinestomRootClassLoader;
import net.minestom.server.extras.selfmodification.mixins.MixinCodeModifier;
import net.minestom.server.extras.selfmodification.mixins.MixinServiceMinestom;
import org.spongepowered.asm.launch.MixinBootstrap;
@ -12,15 +12,15 @@ import java.lang.reflect.Method;
import java.util.Arrays;
/**
* Used to launch Minestom with the {@link MinestomOverwriteClassLoader} to allow for self-modifications
* Used to launch Minestom with the {@link MinestomRootClassLoader} to allow for self-modifications
*/
public final class Bootstrap {
public static void bootstrap(String mainClassFullName, String[] args) {
try {
ClassLoader classLoader = MinestomOverwriteClassLoader.getInstance();
ClassLoader classLoader = MinestomRootClassLoader.getInstance();
startMixin(args);
MinestomOverwriteClassLoader.getInstance().addCodeModifier(new MixinCodeModifier());
MinestomRootClassLoader.getInstance().addCodeModifier(new MixinCodeModifier());
MixinServiceMinestom.gotoPreinitPhase();
// ensure extensions are loaded when starting the server
@ -53,6 +53,6 @@ public final class Bootstrap {
doInit.invoke(null, CommandLineOptions.ofArgs(Arrays.asList(args)));
MixinBootstrap.getPlatform().inject();
Mixins.getConfigs().forEach(c -> MinestomOverwriteClassLoader.getInstance().protectedPackages.add(c.getConfig().getMixinPackage()));
Mixins.getConfigs().forEach(c -> MinestomRootClassLoader.getInstance().protectedPackages.add(c.getConfig().getMixinPackage()));
}
}

4
src/main/java/net/minestom/server/MinecraftServer.java
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@ -77,7 +77,7 @@ public final class MinecraftServer {
public static final String THREAD_NAME_TICK = "Ms-Tick";
public static final String THREAD_NAME_BLOCK_BATCH = "Ms-BlockBatchPool";
public static final int THREAD_COUNT_BLOCK_BATCH = 2;
public static final int THREAD_COUNT_BLOCK_BATCH = 4;
public static final String THREAD_NAME_SCHEDULER = "Ms-SchedulerPool";
public static final int THREAD_COUNT_SCHEDULER = 1;
@ -124,7 +124,7 @@ public final class MinecraftServer {
private static boolean initialized;
private static boolean started;
private static int chunkViewDistance = 10;
private static int chunkViewDistance = 8;
private static int entityViewDistance = 5;
private static int compressionThreshold = 256;
private static ResponseDataConsumer responseDataConsumer;

5
src/main/java/net/minestom/server/UpdateManager.java
View File

@ -3,7 +3,7 @@ package net.minestom.server;
import net.minestom.server.entity.EntityManager;
import net.minestom.server.instance.Instance;
import net.minestom.server.instance.InstanceManager;
import net.minestom.server.thread.PerGroupChunkProvider;
import net.minestom.server.thread.PerInstanceThreadProvider;
import net.minestom.server.thread.ThreadProvider;
import net.minestom.server.utils.thread.MinestomThread;
import net.minestom.server.utils.validate.Check;
@ -33,7 +33,8 @@ public final class UpdateManager {
{
// DEFAULT THREAD PROVIDER
threadProvider = new PerGroupChunkProvider();
//threadProvider = new PerGroupChunkProvider();
threadProvider = new PerInstanceThreadProvider();
}
/**

10
src/main/java/net/minestom/server/command/CommandManager.java
View File

@ -104,6 +104,16 @@ public final class CommandManager {
this.dispatcher.register(command);
}
/**
* Removes a command from the currently registered commands.
* Does nothing if the command was not registered before
*
* @param command the command to remove
*/
public void unregister(@NotNull Command command) {
this.dispatcher.unregister(command);
}
/**
* Gets the {@link Command} registered by {@link #register(Command)}.
*

8
src/main/java/net/minestom/server/command/builder/CommandDispatcher.java
View File

@ -37,6 +37,14 @@ public class CommandDispatcher {
this.commands.add(command);
}
public void unregister(Command command) {
commandMap.remove(command.getName().toLowerCase());
for(String alias : command.getAliases()) {
this.commandMap.remove(alias.toLowerCase());
}
commands.remove(command);
}
/**
* Parses the given command.
*

16
src/main/java/net/minestom/server/entity/Entity.java
View File

@ -31,7 +31,9 @@ import net.minestom.server.utils.callback.OptionalCallback;
import net.minestom.server.utils.chunk.ChunkUtils;
import net.minestom.server.utils.entity.EntityUtils;
import net.minestom.server.utils.player.PlayerUtils;
import net.minestom.server.utils.time.CooldownUtils;
import net.minestom.server.utils.time.TimeUnit;
import net.minestom.server.utils.time.UpdateOption;
import net.minestom.server.utils.validate.Check;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
@ -103,9 +105,9 @@ public abstract class Entity implements Viewable, EventHandler, DataContainer, P
private long lastUpdate;
private final EntityType entityType;
// Network synchronization
private static final long SYNCHRONIZATION_DELAY = 1500; // In ms
private long lastSynchronizationTime;
// Network synchronization, send the absolute position of the entity each X milliseconds
private static final UpdateOption SYNCHRONIZATION_COOLDOWN = new UpdateOption(1500, TimeUnit.MILLISECOND);
private long lastAbsoluteSynchronizationTime;
// Events
private final Map<Class<? extends Event>, Collection<EventCallback>> eventCallbacks = new ConcurrentHashMap<>();
@ -543,8 +545,8 @@ public abstract class Entity implements Viewable, EventHandler, DataContainer, P
}
// Scheduled synchronization
if (time - lastSynchronizationTime >= SYNCHRONIZATION_DELAY) {
lastSynchronizationTime = time;
if (!CooldownUtils.hasCooldown(time, lastAbsoluteSynchronizationTime, SYNCHRONIZATION_COOLDOWN)) {
this.lastAbsoluteSynchronizationTime = time;
sendSynchronization();
}
@ -672,7 +674,7 @@ public abstract class Entity implements Viewable, EventHandler, DataContainer, P
*/
@Nullable
public Chunk getChunk() {
return instance.getChunkAt(lastX, lastZ);
return instance.getChunkAt(position.getX(), position.getZ());
}
/**
@ -1354,7 +1356,7 @@ public abstract class Entity implements Viewable, EventHandler, DataContainer, P
* Asks for a synchronization (position) to happen during next entity tick.
*/
public void askSynchronization() {
this.lastSynchronizationTime = 0;
this.lastAbsoluteSynchronizationTime = 0;
}
private boolean shouldUpdate(long time) {

104
src/main/java/net/minestom/server/entity/Player.java
View File

@ -56,7 +56,6 @@ import net.minestom.server.utils.callback.OptionalCallback;
import net.minestom.server.utils.chunk.ChunkCallback;
import net.minestom.server.utils.chunk.ChunkUtils;
import net.minestom.server.utils.instance.InstanceUtils;
import net.minestom.server.utils.player.PlayerUtils;
import net.minestom.server.utils.time.CooldownUtils;
import net.minestom.server.utils.time.TimeUnit;
import net.minestom.server.utils.time.UpdateOption;
@ -73,12 +72,50 @@ import java.util.function.Consumer;
/**
* Those are the major actors of the server,
* they are not necessary backed by a {@link NettyPlayerConnection} as shown by {@link FakePlayer}
* they are not necessary backed by a {@link NettyPlayerConnection} as shown by {@link FakePlayer}.
* <p>
* You can easily create your own implementation of this and use it with {@link ConnectionManager#setPlayerProvider(PlayerProvider)}.
*/
public class Player extends LivingEntity implements CommandSender {
/**
* @see #getPlayerSynchronizationGroup()
*/
private static volatile int playerSynchronizationGroup = 50;
/**
* For the number of viewers that a player has, the position synchronization packet will be sent
* every 1 tick + (viewers/{@code playerSynchronizationGroup}).
* (eg with a value of 100, having 300 viewers means sending the synchronization packet every 3 ticks)
* <p>
* Used to prevent sending exponentially more packets and therefore reduce network load.
*
* @return the viewers count which would result in a 1 tick delay
*/
public static int getPlayerSynchronizationGroup() {
return playerSynchronizationGroup;
}
/**
* Changes the viewers count resulting in an additional delay of 1 tick for the position synchronization.
*
* @param playerSynchronizationGroup the new synchronization group size
* @see #getPlayerSynchronizationGroup()
*/
public static void setPlayerSynchronizationGroup(int playerSynchronizationGroup) {
Player.playerSynchronizationGroup = playerSynchronizationGroup;
}
/**
* Gets the number of tick between each position synchronization.
*
* @param viewersCount the player viewers count
* @return the number of tick between each position synchronization.
*/
public static int getPlayerSynchronizationTickDelay(int viewersCount) {
return viewersCount / playerSynchronizationGroup + 1;
}
private long lastKeepAlive;
private boolean answerKeepAlive;
@ -131,6 +168,10 @@ public class Player extends LivingEntity implements CommandSender {
private byte targetStage; // The current stage of the target block, only if multi player breaking is disabled
private final Set<Player> targetBreakers = new HashSet<>(1); // Only used if multi player breaking is disabled, contains only this player
// Position synchronization with viewers
private long lastPlayerSynchronizationTime;
private float lastPlayerSyncX, lastPlayerSyncY, lastPlayerSyncZ, lastPlayerSyncYaw, lastPlayerSyncPitch;
// Experience orb pickup
protected UpdateOption experiencePickupCooldown = new UpdateOption(10, TimeUnit.TICK);
private long lastExperiencePickupCheckTime;
@ -299,13 +340,8 @@ public class Player extends LivingEntity implements CommandSender {
@Override
public void update(long time) {
// Flush all pending packets
if (PlayerUtils.isNettyClient(this)) {
((NettyPlayerConnection) playerConnection).getChannel().flush();
}
// Network tick verification
playerConnection.updateStats();
// Network tick
this.playerConnection.update();
// Process received packets
ClientPlayPacket packet;
@ -412,9 +448,16 @@ public class Player extends LivingEntity implements CommandSender {
callEvent(PlayerTickEvent.class, playerTickEvent);
// Multiplayer sync
final boolean positionChanged = position.getX() != lastX || position.getY() != lastY || position.getZ() != lastZ;
final boolean viewChanged = position.getYaw() != lastYaw || position.getPitch() != lastPitch;
if (!viewers.isEmpty()) {
final boolean positionChanged = position.getX() != lastPlayerSyncX ||
position.getY() != lastPlayerSyncY ||
position.getZ() != lastPlayerSyncZ;
final boolean viewChanged = position.getYaw() != lastPlayerSyncYaw ||
position.getPitch() != lastPlayerSyncPitch;
if (!viewers.isEmpty() &&
!CooldownUtils.hasCooldown(time, lastPlayerSynchronizationTime,
TimeUnit.TICK, getPlayerSynchronizationTickDelay(viewers.size()))) {
this.lastPlayerSynchronizationTime = time;
if (positionChanged || viewChanged) {
// Player moved since last time
@ -423,9 +466,9 @@ public class Player extends LivingEntity implements CommandSender {
if (positionChanged && viewChanged) {
EntityPositionAndRotationPacket entityPositionAndRotationPacket = new EntityPositionAndRotationPacket();
entityPositionAndRotationPacket.entityId = getEntityId();
entityPositionAndRotationPacket.deltaX = (short) ((position.getX() * 32 - lastX * 32) * 128);
entityPositionAndRotationPacket.deltaY = (short) ((position.getY() * 32 - lastY * 32) * 128);
entityPositionAndRotationPacket.deltaZ = (short) ((position.getZ() * 32 - lastZ * 32) * 128);
entityPositionAndRotationPacket.deltaX = (short) ((position.getX() * 32 - lastPlayerSyncX * 32) * 128);
entityPositionAndRotationPacket.deltaY = (short) ((position.getY() * 32 - lastPlayerSyncY * 32) * 128);
entityPositionAndRotationPacket.deltaZ = (short) ((position.getZ() * 32 - lastPlayerSyncZ * 32) * 128);
entityPositionAndRotationPacket.yaw = position.getYaw();
entityPositionAndRotationPacket.pitch = position.getPitch();
entityPositionAndRotationPacket.onGround = onGround;
@ -434,9 +477,9 @@ public class Player extends LivingEntity implements CommandSender {
} else if (positionChanged) {
EntityPositionPacket entityPositionPacket = new EntityPositionPacket();
entityPositionPacket.entityId = getEntityId();
entityPositionPacket.deltaX = (short) ((position.getX() * 32 - lastX * 32) * 128);
entityPositionPacket.deltaY = (short) ((position.getY() * 32 - lastY * 32) * 128);
entityPositionPacket.deltaZ = (short) ((position.getZ() * 32 - lastZ * 32) * 128);
entityPositionPacket.deltaX = (short) ((position.getX() * 32 - lastPlayerSyncX * 32) * 128);
entityPositionPacket.deltaY = (short) ((position.getY() * 32 - lastPlayerSyncY * 32) * 128);
entityPositionPacket.deltaZ = (short) ((position.getZ() * 32 - lastPlayerSyncZ * 32) * 128);
entityPositionPacket.onGround = onGround;
updatePacket = entityPositionPacket;
@ -472,16 +515,17 @@ public class Player extends LivingEntity implements CommandSender {
entityMovementPacket.entityId = getEntityId();
sendPacketToViewers(entityMovementPacket);
}
}
if (positionChanged) {
lastX = position.getX();
lastY = position.getY();
lastZ = position.getZ();
}
if (viewChanged) {
lastYaw = position.getYaw();
lastPitch = position.getPitch();
// Update sync data
if (positionChanged) {
lastPlayerSyncX = position.getX();
lastPlayerSyncY = position.getY();
lastPlayerSyncZ = position.getZ();
}
if (viewChanged) {
lastPlayerSyncYaw = position.getYaw();
lastPlayerSyncPitch = position.getPitch();
}
}
}
@ -659,7 +703,7 @@ public class Player extends LivingEntity implements CommandSender {
sendDimension(instanceDimensionType);
}
final long[] visibleChunks = ChunkUtils.getChunksInRange(position, getChunkRange());
final long[] visibleChunks = ChunkUtils.getChunksInRange(firstSpawn ? getRespawnPoint() : position, getChunkRange());
final int length = visibleChunks.length;
AtomicInteger counter = new AtomicInteger(0);
@ -703,11 +747,11 @@ public class Player extends LivingEntity implements CommandSender {
*/
private void spawnPlayer(Instance instance, boolean firstSpawn) {
this.viewableEntities.forEach(entity -> entity.removeViewer(this));
super.setInstance(instance);
if (firstSpawn) {
teleport(getRespawnPoint());
this.position = getRespawnPoint();
}
super.setInstance(instance);
PlayerSpawnEvent spawnEvent = new PlayerSpawnEvent(this, instance, firstSpawn);
callEvent(PlayerSpawnEvent.class, spawnEvent);

4
src/main/java/net/minestom/server/event/player/PlayerStartDiggingEvent.java
View File

@ -8,6 +8,10 @@ import org.jetbrains.annotations.NotNull;
/**
* Called when a {@link Player} start digging a block,
* can be used to forbid the {@link Player} from mining it.
* <p>
* Be aware that cancelling this event does not necessary prevent the player from breaking the block
* (could be because of high latency or a modified client) so cancelling {@link PlayerBlockBreakEvent} is also necessary.
* Could be fixed in future Minestom version.
*/
public class PlayerStartDiggingEvent extends CancellableEvent {

171
src/main/java/net/minestom/server/extensions/DiscoveredExtension.java Normal file
View File

@ -0,0 +1,171 @@
package net.minestom.server.extensions;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.net.URL;
import java.util.LinkedList;
import java.util.List;
final class DiscoveredExtension {
public final static Logger LOGGER = LoggerFactory.getLogger(DiscoveredExtension.class);
public static final String NAME_REGEX = "[A-Za-z][_A-Za-z0-9]+";
private String name;
private String entrypoint;
private String version;
private String mixinConfig;
private String[] authors;
private String[] codeModifiers;
private String[] dependencies;
private ExternalDependencies externalDependencies;
transient List<URL> files = new LinkedList<>();
transient LoadStatus loadStatus = LoadStatus.LOAD_SUCCESS;
transient private File originalJar;
@NotNull
public String getName() {
return name;
}
@NotNull
public String getEntrypoint() {
return entrypoint;
}
@NotNull
public String getVersion() {
return version;
}
@NotNull
public String getMixinConfig() {
return mixinConfig;
}
@NotNull
public String[] getAuthors() {
return authors;
}
@NotNull
public String[] getCodeModifiers() {
if (codeModifiers == null) {
codeModifiers = new String[0];
}
return codeModifiers;
}
@NotNull
public String[] getDependencies() {
return dependencies;
}
@NotNull
public ExternalDependencies getExternalDependencies() {
return externalDependencies;
}
void setOriginalJar(@Nullable File file) {
originalJar = file;
}
@Nullable
File getOriginalJar() {
return originalJar;
}
static void verifyIntegrity(@NotNull DiscoveredExtension extension) {
if (extension.name == null) {
StringBuilder fileList = new StringBuilder();
for (URL f : extension.files) {
fileList.append(f.toExternalForm()).append(", ");
}
LOGGER.error("Extension with no name. (at {}})", fileList);
LOGGER.error("Extension at ({}) will not be loaded.", fileList);
extension.loadStatus = DiscoveredExtension.LoadStatus.INVALID_NAME;
// To ensure @NotNull: name = INVALID_NAME
extension.name = extension.loadStatus.name();
return;
}
if (!extension.name.matches(NAME_REGEX)) {
LOGGER.error("Extension '{}' specified an invalid name.", extension.name);
LOGGER.error("Extension '{}' will not be loaded.", extension.name);
extension.loadStatus = DiscoveredExtension.LoadStatus.INVALID_NAME;
// To ensure @NotNull: name = INVALID_NAME
extension.name = extension.loadStatus.name();
return;
}
if (extension.entrypoint == null) {
LOGGER.error("Extension '{}' did not specify an entry point (via 'entrypoint').", extension.name);
LOGGER.error("Extension '{}' will not be loaded.", extension.name);
extension.loadStatus = DiscoveredExtension.LoadStatus.NO_ENTRYPOINT;
// To ensure @NotNull: entrypoint = NO_ENTRYPOINT
extension.entrypoint = extension.loadStatus.name();
return;
}
// Handle defaults
// If we reach this code, then the extension will most likely be loaded:
if (extension.version == null) {
LOGGER.warn("Extension '{}' did not specify a version.", extension.name);
LOGGER.warn("Extension '{}' will continue to load but should specify a plugin version.", extension.name);
extension.version = "Unspecified";
}
if (extension.mixinConfig == null) {
extension.mixinConfig = "";
}
if (extension.authors == null) {
extension.authors = new String[0];
}
if (extension.codeModifiers == null) {
extension.codeModifiers = new String[0];
}
// No dependencies were specified
if (extension.dependencies == null) {
extension.dependencies = new String[0];
}
// No external dependencies were specified;
if (extension.externalDependencies == null) {
extension.externalDependencies = new ExternalDependencies();
}
}
enum LoadStatus {
LOAD_SUCCESS("Actually, it did not fail. This message should not have been printed."),
MISSING_DEPENDENCIES("Missing dependencies, check your logs."),
INVALID_NAME("Invalid name."),
NO_ENTRYPOINT("No entrypoint specified."),
FAILED_TO_SETUP_CLASSLOADER("Extension classloader could not be setup."),
LOAD_FAILED("Load failed. See logs for more information."),
;
private final String message;
LoadStatus(@NotNull String message) {
this.message = message;
}
@NotNull
public String getMessage() {
return message;
}
}
static final class ExternalDependencies {
Repository[] repositories = new Repository[0];
String[] artifacts = new String[0];
static class Repository {
String name = "";
String url = "";
}
}
}

32
src/main/java/net/minestom/server/extensions/Extension.java
View File

@ -3,11 +3,15 @@ package net.minestom.server.extensions;
import org.jetbrains.annotations.NotNull;
import org.slf4j.Logger;
import java.util.ArrayList;
import java.util.List;
public abstract class Extension {
// Set by reflection
@SuppressWarnings("unused")
private ExtensionDescription description;
// Set by reflection
@SuppressWarnings("unused")
private Logger logger;
protected Extension() {
@ -34,24 +38,36 @@ public abstract class Extension {
}
/**
* Called after postTerminate when reloading an extension
*/
public void unload() {
}
@NotNull
public ExtensionDescription getDescription() {
return description;
}
@NotNull
protected Logger getLogger() {
return logger;
}
protected static class ExtensionDescription {
public static class ExtensionDescription {
private final String name;
private final String version;
private final List<String> authors;
private final List<String> dependents = new ArrayList<>();
private final DiscoveredExtension origin;
protected ExtensionDescription(@NotNull String name, @NotNull String version, @NotNull List<String> authors) {
ExtensionDescription(@NotNull String name, @NotNull String version, @NotNull List<String> authors, @NotNull DiscoveredExtension origin) {
this.name = name;
this.version = version;
this.authors = authors;
this.origin = origin;
}
@NotNull
@ -68,5 +84,15 @@ public abstract class Extension {
public List<String> getAuthors() {
return authors;
}
@NotNull
public List<String> getDependents() {
return dependents;
}
@NotNull
DiscoveredExtension getOrigin() {
return origin;
}
}
}

54
src/main/java/net/minestom/server/extensions/ExtensionDependencyResolver.java Normal file
View File

@ -0,0 +1,54 @@
package net.minestom.server.extensions;
import net.minestom.dependencies.DependencyResolver;
import net.minestom.dependencies.ResolvedDependency;
import net.minestom.dependencies.UnresolvedDependencyException;
import org.jetbrains.annotations.NotNull;
import java.io.File;
import java.net.URL;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
/**
* Does NOT relocate extensions
*/
public class ExtensionDependencyResolver implements DependencyResolver {
private Map<String, DiscoveredExtension> extensionMap = new HashMap<>();
public ExtensionDependencyResolver(List<DiscoveredExtension> extensions) {
for(DiscoveredExtension ext : extensions) {
extensionMap.put(ext.getName(), ext);
}
}
@NotNull
@Override
public ResolvedDependency resolve(@NotNull String extensionName, @NotNull File file) throws UnresolvedDependencyException {
if(extensionMap.containsKey(extensionName)) {
DiscoveredExtension ext = extensionMap.get(extensionName);
// convert extension URLs to subdependencies
// FIXME: this is not a deep conversion, this might create an issue in this scenario with different classloaders:
// A depends on an external lib (Ext<-A)
// B depends on A (A<-B)
// When loading B, with no deep conversion, Ext will not be added to the list of dependencies (because it is not a direct dependency)
// But when trying to call/access code from extension A, the parts dependent on Ext won't be inside B's dependencies, triggering a ClassNotFoundException
List<ResolvedDependency> deps = new LinkedList<>();
for(URL u : ext.files) {
deps.add(new ResolvedDependency(u.toExternalForm(), u.toExternalForm(), "", u, new LinkedList<>()));
}
return new ResolvedDependency(ext.getName(), ext.getName(), ext.getVersion(), ext.files.get(0), deps);
}
throw new UnresolvedDependencyException("No extension named "+extensionName);
}
@Override
public String toString() {
String list = extensionMap.values().stream().map(entry -> entry.getName()).collect(Collectors.joining(", "));
return "ExtensionDependencyResolver[" + list + "]";
}
}

663
src/main/java/net/minestom/server/extensions/ExtensionManager.java
View File

@ -1,7 +1,10 @@
package net.minestom.server.extensions;
import com.google.gson.*;
import net.minestom.server.extras.selfmodification.MinestomOverwriteClassLoader;
import com.google.gson.Gson;
import net.minestom.dependencies.DependencyGetter;
import net.minestom.dependencies.maven.MavenRepository;
import net.minestom.server.extras.selfmodification.MinestomExtensionClassLoader;
import net.minestom.server.extras.selfmodification.MinestomRootClassLoader;
import net.minestom.server.utils.validate.Check;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
@ -13,13 +16,13 @@ import java.io.*;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.*;
import java.util.stream.Collectors;
import java.util.zip.ZipFile;
public final class ExtensionManager {
public class ExtensionManager {
public final static Logger LOGGER = LoggerFactory.getLogger(ExtensionManager.class);
@ -27,11 +30,15 @@ public final class ExtensionManager {
private final static String INDEV_RESOURCES_FOLDER = "minestom.extension.indevfolder.resources";
private final static Gson GSON = new Gson();
private final Map<String, URLClassLoader> extensionLoaders = new HashMap<>();
private final Map<String, MinestomExtensionClassLoader> extensionLoaders = new HashMap<>();
private final Map<String, Extension> extensions = new HashMap<>();
private final File extensionFolder = new File("extensions");
private final File dependenciesFolder = new File(extensionFolder, ".libs");
private boolean loaded;
private final List<Extension> extensionList = new ArrayList<>();
private final List<Extension> immutableExtensionListView = Collections.unmodifiableList(extensionList);
public ExtensionManager() {
}
@ -46,146 +53,156 @@ public final class ExtensionManager {
}
}
final List<DiscoveredExtension> discoveredExtensions = discoverExtensions();
if (!dependenciesFolder.exists()) {
if (!dependenciesFolder.mkdirs()) {
LOGGER.error("Could not find nor create the extension dependencies folder, extensions will not be loaded!");
return;
}
}
List<DiscoveredExtension> discoveredExtensions = discoverExtensions();
discoveredExtensions = generateLoadOrder(discoveredExtensions);
loadDependencies(discoveredExtensions);
// remove invalid extensions
discoveredExtensions.removeIf(ext -> ext.loadStatus != DiscoveredExtension.LoadStatus.LOAD_SUCCESS);
for (DiscoveredExtension discoveredExtension : discoveredExtensions) {
try {
setupClassLoader(discoveredExtension);
} catch (Exception e) {
discoveredExtension.loadStatus = DiscoveredExtension.LoadStatus.FAILED_TO_SETUP_CLASSLOADER;
e.printStackTrace();
LOGGER.error("Failed to load extension {}", discoveredExtension.getName());
LOGGER.error("Failed to load extension", e);
}
}
// remove invalid extensions
discoveredExtensions.removeIf(ext -> ext.loadStatus != DiscoveredExtension.LoadStatus.LOAD_SUCCESS);
setupCodeModifiers(discoveredExtensions);
for (DiscoveredExtension discoveredExtension : discoveredExtensions) {
URLClassLoader loader;
URL[] urls = new URL[discoveredExtension.files.length];
try {
for (int i = 0; i < urls.length; i++) {
urls[i] = discoveredExtension.files[i].toURI().toURL();
}
loader = newClassLoader(urls);
} catch (MalformedURLException e) {
LOGGER.error("Failed to get URL.", e);
continue;
}
// TODO: Can't we use discoveredExtension.description here? Someone should test that.
final InputStream extensionInputStream = loader.getResourceAsStream("extension.json");
if (extensionInputStream == null) {
StringBuilder urlsString = new StringBuilder();
for (int i = 0; i < urls.length; i++) {
URL url = urls[i];
if (i != 0) {
urlsString.append(" ; ");
}
urlsString.append("'").append(url.toString()).append("'");
}
LOGGER.error("Failed to find extension.json in the urls '{}'.", urlsString);
continue;
}
JsonObject extensionDescriptionJson = JsonParser.parseReader(new InputStreamReader(extensionInputStream)).getAsJsonObject();
final String mainClass = extensionDescriptionJson.get("entrypoint").getAsString();
final String extensionName = extensionDescriptionJson.get("name").getAsString();
// Check the validity of the extension's name.
if (!extensionName.matches("[A-Za-z]+")) {
LOGGER.error("Extension '{}' specified an invalid name.", extensionName);
LOGGER.error("Extension '{}' will not be loaded.", extensionName);
continue;
}
// Get ExtensionDescription (authors, version etc.)
Extension.ExtensionDescription extensionDescription;
{
String version;
if (!extensionDescriptionJson.has("version")) {
LOGGER.warn("Extension '{}' did not specify a version.", extensionName);
LOGGER.warn("Extension '{}' will continue to load but should specify a plugin version.", extensionName);
version = "Not Specified";
} else {
version = extensionDescriptionJson.get("version").getAsString();
}
List<String> authors;
if (!extensionDescriptionJson.has("authors")) {
authors = new ArrayList<>();
} else {
authors = Arrays.asList(new Gson().fromJson(extensionDescriptionJson.get("authors"), String[].class));
}
extensionDescription = new Extension.ExtensionDescription(extensionName, version, authors);
}
extensionLoaders.put(extensionName.toLowerCase(), loader);
if (extensions.containsKey(extensionName.toLowerCase())) {
LOGGER.error("An extension called '{}' has already been registered.", extensionName);
continue;
}
Class<?> jarClass;
try {
jarClass = Class.forName(mainClass, true, loader);
} catch (ClassNotFoundException e) {
LOGGER.error("Could not find main class '{}' in extension '{}'.", mainClass, extensionName, e);
continue;
}
Class<? extends Extension> extensionClass;
try {
extensionClass = jarClass.asSubclass(Extension.class);
} catch (ClassCastException e) {
LOGGER.error("Main class '{}' in '{}' does not extend the 'Extension' superclass.", mainClass, extensionName, e);
continue;
}
Constructor<? extends Extension> constructor;
try {
constructor = extensionClass.getDeclaredConstructor();
// Let's just make it accessible, plugin creators don't have to make this public.
constructor.setAccessible(true);
} catch (NoSuchMethodException e) {
LOGGER.error("Main class '{}' in '{}' does not define a no-args constructor.", mainClass, extensionName, e);
continue;
}
Extension extension = null;
try {
extension = constructor.newInstance();
} catch (InstantiationException e) {
LOGGER.error("Main class '{}' in '{}' cannot be an abstract class.", mainClass, extensionName, e);
continue;
} catch (IllegalAccessException ignored) {
// We made it accessible, should not occur
} catch (InvocationTargetException e) {
LOGGER.error(
"While instantiating the main class '{}' in '{}' an exception was thrown.",
mainClass,
extensionName,
e.getTargetException()
);
continue;
}
// Set extension description
try {
Field descriptionField = extensionClass.getSuperclass().getDeclaredField("description");
descriptionField.setAccessible(true);
descriptionField.set(extension, extensionDescription);
} catch (IllegalAccessException e) {
// We made it accessible, should not occur
} catch (NoSuchFieldException e) {
LOGGER.error("Main class '{}' in '{}' has no description field.", mainClass, extensionName, e);
continue;
}
// Set logger
try {
Field descriptionField = extensionClass.getSuperclass().getDeclaredField("logger");
descriptionField.setAccessible(true);
descriptionField.set(extension, LoggerFactory.getLogger(extensionClass));
} catch (IllegalAccessException e) {
// We made it accessible, should not occur
attemptSingleLoad(discoveredExtension);
} catch (Exception e) {
discoveredExtension.loadStatus = DiscoveredExtension.LoadStatus.LOAD_FAILED;
e.printStackTrace();
} catch (NoSuchFieldException e) {
// This should also not occur (unless someone changed the logger in Extension superclass).
LOGGER.error("Main class '{}' in '{}' has no logger field.", mainClass, extensionName, e);
LOGGER.error("Failed to load extension {}", discoveredExtension.getName());
LOGGER.error("Failed to load extension", e);
}
extensions.put(extensionName.toLowerCase(), extension);
}
}
private void setupClassLoader(DiscoveredExtension discoveredExtension) {
String extensionName = discoveredExtension.getName();
MinestomExtensionClassLoader loader;
URL[] urls = discoveredExtension.files.toArray(new URL[0]);
loader = newClassLoader(discoveredExtension, urls);
extensionLoaders.put(extensionName.toLowerCase(), loader);
}
private Extension attemptSingleLoad(DiscoveredExtension discoveredExtension) {
// Create ExtensionDescription (authors, version etc.)
String extensionName = discoveredExtension.getName();
String mainClass = discoveredExtension.getEntrypoint();
Extension.ExtensionDescription extensionDescription = new Extension.ExtensionDescription(
extensionName,
discoveredExtension.getVersion(),
Arrays.asList(discoveredExtension.getAuthors()),
discoveredExtension
);
MinestomExtensionClassLoader loader = extensionLoaders.get(extensionName.toLowerCase());
if (extensions.containsKey(extensionName.toLowerCase())) {
LOGGER.error("An extension called '{}' has already been registered.", extensionName);
return null;
}
Class<?> jarClass;
try {
jarClass = Class.forName(mainClass, true, loader);
} catch (ClassNotFoundException e) {
LOGGER.error("Could not find main class '{}' in extension '{}'.", mainClass, extensionName, e);
return null;
}
Class<? extends Extension> extensionClass;
try {
extensionClass = jarClass.asSubclass(Extension.class);
} catch (ClassCastException e) {
LOGGER.error("Main class '{}' in '{}' does not extend the 'Extension' superclass.", mainClass, extensionName, e);
return null;
}
Constructor<? extends Extension> constructor;
try {
constructor = extensionClass.getDeclaredConstructor();
// Let's just make it accessible, plugin creators don't have to make this public.
constructor.setAccessible(true);
} catch (NoSuchMethodException e) {
LOGGER.error("Main class '{}' in '{}' does not define a no-args constructor.", mainClass, extensionName, e);
return null;
}
Extension extension = null;
try {
extension = constructor.newInstance();
} catch (InstantiationException e) {
LOGGER.error("Main class '{}' in '{}' cannot be an abstract class.", mainClass, extensionName, e);
return null;
} catch (IllegalAccessException ignored) {
// We made it accessible, should not occur
} catch (InvocationTargetException e) {
LOGGER.error(
"While instantiating the main class '{}' in '{}' an exception was thrown.",
mainClass,
extensionName,
e.getTargetException()
);
return null;
}
// Set extension description
try {
Field descriptionField = extensionClass.getSuperclass().getDeclaredField("description");
descriptionField.setAccessible(true);
descriptionField.set(extension, extensionDescription);
} catch (IllegalAccessException e) {
// We made it accessible, should not occur
} catch (NoSuchFieldException e) {
LOGGER.error("Main class '{}' in '{}' has no description field.", mainClass, extensionName, e);
return null;
}
// Set logger
try {
Field loggerField = extensionClass.getSuperclass().getDeclaredField("logger");
loggerField.setAccessible(true);
loggerField.set(extension, LoggerFactory.getLogger(extensionClass));
} catch (IllegalAccessException e) {
// We made it accessible, should not occur
e.printStackTrace();
} catch (NoSuchFieldException e) {
// This should also not occur (unless someone changed the logger in Extension superclass).
LOGGER.error("Main class '{}' in '{}' has no logger field.", mainClass, extensionName, e);
}
// add dependents to pre-existing extensions, so that they can easily be found during reloading
for (String dependency : discoveredExtension.getDependencies()) {
Extension dep = extensions.get(dependency.toLowerCase());
if (dep == null) {
LOGGER.warn("Dependency {} of {} is null? This means the extension has been loaded without its dependency, which could cause issues later.", dependency, discoveredExtension.getName());
} else {
dep.getDescription().getDependents().add(discoveredExtension.getName());
}
}
extensionList.add(extension); // add to a list, as lists preserve order
extensions.put(extensionName.toLowerCase(), extension);
return extension;
}
@NotNull
private List<DiscoveredExtension> discoverExtensions() {
List<DiscoveredExtension> extensions = new LinkedList<>();
@ -196,15 +213,9 @@ public final class ExtensionManager {
if (!file.getName().endsWith(".jar")) {
continue;
}
try (ZipFile f = new ZipFile(file);
InputStreamReader reader = new InputStreamReader(f.getInputStream(f.getEntry("extension.json")))) {
DiscoveredExtension extension = new DiscoveredExtension();
extension.files = new File[]{file};
extension.description = GSON.fromJson(reader, JsonObject.class);
DiscoveredExtension extension = discoverFromJar(file);
if (extension != null && extension.loadStatus == DiscoveredExtension.LoadStatus.LOAD_SUCCESS) {
extensions.add(extension);
} catch (IOException e) {
e.printStackTrace();
}
}
@ -214,10 +225,16 @@ public final class ExtensionManager {
final String extensionClasses = System.getProperty(INDEV_CLASSES_FOLDER);
final String extensionResources = System.getProperty(INDEV_RESOURCES_FOLDER);
try (InputStreamReader reader = new InputStreamReader(new FileInputStream(new File(extensionResources, "extension.json")))) {
DiscoveredExtension extension = new DiscoveredExtension();
extension.files = new File[]{new File(extensionClasses), new File(extensionResources)};
extension.description = GSON.fromJson(reader, JsonObject.class);
extensions.add(extension);
DiscoveredExtension extension = GSON.fromJson(reader, DiscoveredExtension.class);
extension.files.add(new File(extensionClasses).toURI().toURL());
extension.files.add(new File(extensionResources).toURI().toURL());
// Verify integrity and ensure defaults
DiscoveredExtension.verifyIntegrity(extension);
if (extension.loadStatus == DiscoveredExtension.LoadStatus.LOAD_SUCCESS) {
extensions.add(extension);
}
} catch (IOException e) {
e.printStackTrace();
}
@ -225,14 +242,186 @@ public final class ExtensionManager {
return extensions;
}
private DiscoveredExtension discoverFromJar(File file) {
try (ZipFile f = new ZipFile(file);
InputStreamReader reader = new InputStreamReader(f.getInputStream(f.getEntry("extension.json")))) {
DiscoveredExtension extension = GSON.fromJson(reader, DiscoveredExtension.class);
extension.setOriginalJar(file);
extension.files.add(file.toURI().toURL());
// Verify integrity and ensure defaults
DiscoveredExtension.verifyIntegrity(extension);
return extension;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
private List<DiscoveredExtension> generateLoadOrder(List<DiscoveredExtension> discoveredExtensions) {
// Do some mapping so we can map strings to extensions.
Map<String, DiscoveredExtension> extensionMap = new HashMap<>();
Map<DiscoveredExtension, List<DiscoveredExtension>> dependencyMap = new HashMap<>();
for (DiscoveredExtension discoveredExtension : discoveredExtensions) {
extensionMap.put(discoveredExtension.getName().toLowerCase(), discoveredExtension);
}
for (DiscoveredExtension discoveredExtension : discoveredExtensions) {
List<DiscoveredExtension> dependencies = Arrays.stream(discoveredExtension.getDependencies())
.map(dependencyName -> {
DiscoveredExtension dependencyExtension = extensionMap.get(dependencyName.toLowerCase());
// Specifies an extension we don't have.
if (dependencyExtension == null) {
// attempt to see if it is not already loaded (happens with dynamic (re)loading)
if (extensions.containsKey(dependencyName.toLowerCase())) {
return extensions.get(dependencyName.toLowerCase()).getDescription().getOrigin();
} else {
LOGGER.error("Extension {} requires an extension called {}.", discoveredExtension.getName(), dependencyName);
LOGGER.error("However the extension {} could not be found.", dependencyName);
LOGGER.error("Therefore {} will not be loaded.", discoveredExtension.getName());
discoveredExtension.loadStatus = DiscoveredExtension.LoadStatus.MISSING_DEPENDENCIES;
}
}
// This will return null for an unknown-extension
return extensionMap.get(dependencyName.toLowerCase());
}).collect(Collectors.toList());
// If the list contains null ignore it.
if (!dependencies.contains(null)) {
dependencyMap.put(
discoveredExtension,
dependencies
);
}
}
// List containing the real load order.
LinkedList<DiscoveredExtension> sortedList = new LinkedList<>();
// entries with empty lists
List<Map.Entry<DiscoveredExtension, List<DiscoveredExtension>>> loadableExtensions;
// While there are entries with no more elements (no more dependencies)
while (!(
loadableExtensions = dependencyMap.entrySet().stream().filter(entry -> areAllDependenciesLoaded(entry.getValue())).collect(Collectors.toList())
).isEmpty()
) {
// Get all "loadable" (not actually being loaded!) extensions and put them in the sorted list.
for (Map.Entry<DiscoveredExtension, List<DiscoveredExtension>> entry : loadableExtensions) {
// Add to sorted list.
sortedList.add(entry.getKey());
// Remove to make the next iterations a little bit quicker (hopefully) and to find cyclic dependencies.
dependencyMap.remove(entry.getKey());
// Remove this dependency from all the lists (if they include it) to make way for next level of extensions.
dependencyMap.forEach((key, dependencyList) -> dependencyList.remove(entry.getKey()));
}
}
// Check if there are cyclic extensions.
if (!dependencyMap.isEmpty()) {
LOGGER.error("Minestom found " + dependencyMap.size() + " cyclic extensions.");
LOGGER.error("Cyclic extensions depend on each other and can therefore not be loaded.");
for (Map.Entry<DiscoveredExtension, List<DiscoveredExtension>> entry : dependencyMap.entrySet()) {
DiscoveredExtension discoveredExtension = entry.getKey();
LOGGER.error(discoveredExtension.getName() + " could not be loaded, as it depends on: "
+ entry.getValue().stream().map(DiscoveredExtension::getName).collect(Collectors.joining(", "))
+ "."
);
}
}
return sortedList;
}
private boolean areAllDependenciesLoaded(List<DiscoveredExtension> dependencies) {
return dependencies.isEmpty() || dependencies.stream().allMatch(ext -> extensions.containsKey(ext.getName().toLowerCase()));
}
private void loadDependencies(List<DiscoveredExtension> extensions) {
List<DiscoveredExtension> allLoadedExtensions = new LinkedList<>(extensions);
extensionList.stream().map(ext -> ext.getDescription().getOrigin()).forEach(allLoadedExtensions::add);
ExtensionDependencyResolver extensionDependencyResolver = new ExtensionDependencyResolver(allLoadedExtensions);
for (DiscoveredExtension ext : extensions) {
try {
DependencyGetter getter = new DependencyGetter();
DiscoveredExtension.ExternalDependencies externalDependencies = ext.getExternalDependencies();
List<MavenRepository> repoList = new LinkedList<>();
for (var repository : externalDependencies.repositories) {
if (repository.name == null) {
throw new IllegalStateException("Missing 'name' element in repository object.");
}
if (repository.name.isEmpty()) {
throw new IllegalStateException("Invalid 'name' element in repository object.");
}
if (repository.url == null) {
throw new IllegalStateException("Missing 'url' element in repository object.");
}
if (repository.url.isEmpty()) {
throw new IllegalStateException("Invalid 'url' element in repository object.");
}
repoList.add(new MavenRepository(repository.name, repository.url));
}
getter.addMavenResolver(repoList);
getter.addResolver(extensionDependencyResolver);
for (var artifact : externalDependencies.artifacts) {
var resolved = getter.get(artifact, dependenciesFolder);
addDependencyFile(resolved.getContentsLocation(), ext);
LOGGER.trace("Dependency of extension {}: {}", ext.getName(), resolved);
}
for (var dependencyName : ext.getDependencies()) {
var resolved = getter.get(dependencyName, dependenciesFolder);
addDependencyFile(resolved.getContentsLocation(), ext);
LOGGER.trace("Dependency of extension {}: {}", ext.getName(), resolved);
}
} catch (Exception e) {
ext.loadStatus = DiscoveredExtension.LoadStatus.MISSING_DEPENDENCIES;
LOGGER.error("Failed to load dependencies for extension {}", ext.getName());
LOGGER.error("Extension '{}' will not be loaded", ext.getName());
LOGGER.error("This is the exception", e);
}
}
}
private void addDependencyFile(URL dependency, DiscoveredExtension extension) {
extension.files.add(dependency);
LOGGER.trace("Added dependency {} to extension {} classpath", dependency.toExternalForm(), extension.getName());
}
/**
* Loads a URL into the classpath.
* Creates a new class loader for the given extension.
* Will add the new loader as a child of all its dependencies' loaders.
*
* @param urls {@link URL} (usually a JAR) that should be loaded.
*/
@NotNull
public URLClassLoader newClassLoader(@NotNull URL[] urls) {
return URLClassLoader.newInstance(urls, ExtensionManager.class.getClassLoader());
public MinestomExtensionClassLoader newClassLoader(@NotNull DiscoveredExtension extension, @NotNull URL[] urls) {
MinestomRootClassLoader root = MinestomRootClassLoader.getInstance();
MinestomExtensionClassLoader loader = new MinestomExtensionClassLoader(extension.getName(), urls, root);
if (extension.getDependencies().length == 0) {
// orphaned extension, we can insert it directly
root.addChild(loader);
} else {
// we need to keep track that it has actually been inserted
// even though it should always be (due to the order in which extensions are loaders), it is an additional layer of """security"""
boolean foundOne = false;
for (String dependency : extension.getDependencies()) {
if (extensionLoaders.containsKey(dependency.toLowerCase())) {
MinestomExtensionClassLoader parentLoader = extensionLoaders.get(dependency.toLowerCase());
parentLoader.addChild(loader);
foundOne = true;
}
}
if (!foundOne) {
LOGGER.error("Could not load extension {}, could not find any parent inside classloader hierarchy.", extension.getName());
throw new RuntimeException("Could not load extension " + extension.getName() + ", could not find any parent inside classloader hierarchy.");
}
}
return loader;
}
@NotNull
@ -242,7 +431,7 @@ public final class ExtensionManager {
@NotNull
public List<Extension> getExtensions() {
return new ArrayList<>(extensions.values());
return immutableExtensionListView;
}
@Nullable
@ -260,35 +449,177 @@ public final class ExtensionManager {
*/
private void setupCodeModifiers(@NotNull List<DiscoveredExtension> extensions) {
final ClassLoader cl = getClass().getClassLoader();
if (!(cl instanceof MinestomOverwriteClassLoader)) {
if (!(cl instanceof MinestomRootClassLoader)) {
LOGGER.warn("Current class loader is not a MinestomOverwriteClassLoader, but " + cl + ". This disables code modifiers (Mixin support is therefore disabled)");
return;
}
MinestomOverwriteClassLoader modifiableClassLoader = (MinestomOverwriteClassLoader) cl;
MinestomRootClassLoader modifiableClassLoader = (MinestomRootClassLoader) cl;
LOGGER.info("Start loading code modifiers...");
for (DiscoveredExtension extension : extensions) {
try {
if (extension.description.has("codeModifiers")) {
final JsonArray codeModifierClasses = extension.description.getAsJsonArray("codeModifiers");
for (JsonElement elem : codeModifierClasses) {
modifiableClassLoader.loadModifier(extension.files, elem.getAsString());
}
for (String codeModifierClass : extension.getCodeModifiers()) {
modifiableClassLoader.loadModifier(extension.files.toArray(new File[0]), codeModifierClass);
}
if (extension.description.has("mixinConfig")) {
final String mixinConfigFile = extension.description.get("mixinConfig").getAsString();
if (!extension.getMixinConfig().isEmpty()) {
final String mixinConfigFile = extension.getMixinConfig();
Mixins.addConfiguration(mixinConfigFile);
LOGGER.info("Found mixin in extension " + extension.description.get("name").getAsString() + ": " + mixinConfigFile);
LOGGER.info("Found mixin in extension " + extension.getName() + ": " + mixinConfigFile);
}
} catch (Exception e) {
e.printStackTrace();
LOGGER.error("Failed to load code modifier for extension in files: " + Arrays.toString(extension.files), e);
LOGGER.error("Failed to load code modifier for extension in files: " + extension.files.stream().map(u -> u.toExternalForm()).collect(Collectors.joining(", ")), e);
}
}
LOGGER.info("Done loading code modifiers.");
}
private static class DiscoveredExtension {
private File[] files;
private JsonObject description;
private void unload(Extension ext) {
ext.preTerminate();
ext.terminate();
ext.postTerminate();
ext.unload();
// remove as dependent of other extensions
// this avoids issues where a dependent extension fails to reload, and prevents the base extension to reload too
for (Extension e : extensionList) {
e.getDescription().getDependents().remove(ext.getDescription().getName());
}
String id = ext.getDescription().getName().toLowerCase();
// remove from loaded extensions
extensions.remove(id);
extensionList.remove(ext);
// remove class loader, required to reload the classes
MinestomExtensionClassLoader classloader = extensionLoaders.remove(id);
try {
// close resources
classloader.close();
} catch (IOException e) {
e.printStackTrace();
}
MinestomRootClassLoader.getInstance().removeChildInHierarchy(classloader);
}
public void reload(String extensionName) {
Extension ext = extensions.get(extensionName.toLowerCase());
if (ext == null) {
throw new IllegalArgumentException("Extension " + extensionName + " is not currently loaded.");
}
File originalJar = ext.getDescription().getOrigin().getOriginalJar();
if (originalJar == null) {
LOGGER.error("Cannot reload extension {} that is not from a .jar file!", extensionName);
return;
}
LOGGER.info("Reload extension {} from jar file {}", extensionName, originalJar.getAbsolutePath());
List<String> dependents = new LinkedList<>(ext.getDescription().getDependents()); // copy dependents list
List<File> originalJarsOfDependents = new LinkedList<>();
for (String dependentID : dependents) {
Extension dependentExt = extensions.get(dependentID.toLowerCase());
File dependentOriginalJar = dependentExt.getDescription().getOrigin().getOriginalJar();
originalJarsOfDependents.add(dependentOriginalJar);
if (dependentOriginalJar == null) {
LOGGER.error("Cannot reload extension {} that is not from a .jar file!", dependentID);
return;
}
LOGGER.info("Unloading dependent extension {} (because it depends on {})", dependentID, extensionName);
unload(dependentExt);
}
LOGGER.info("Unloading extension {}", extensionName);
unload(ext);
System.gc();
// ext and its dependents should no longer be referenced from now on
// rediscover extension to reload. We allow dependency changes, so we need to fully reload it
List<DiscoveredExtension> extensionsToReload = new LinkedList<>();
LOGGER.info("Rediscover extension {} from jar {}", extensionName, originalJar.getAbsolutePath());
DiscoveredExtension rediscoveredExtension = discoverFromJar(originalJar);
extensionsToReload.add(rediscoveredExtension);
for (File dependentJar : originalJarsOfDependents) {
// rediscover dependent extension to reload
LOGGER.info("Rediscover dependent extension (depends on {}) from jar {}", extensionName, dependentJar.getAbsolutePath());
extensionsToReload.add(discoverFromJar(dependentJar));
}
// ensure correct order of dependencies
loadExtensionList(extensionsToReload);
}
public boolean loadDynamicExtension(File jarFile) throws FileNotFoundException {
if (!jarFile.exists()) {
throw new FileNotFoundException("File '" + jarFile.getAbsolutePath() + "' does not exists. Cannot load extension.");
}
LOGGER.info("Discover dynamic extension from jar {}", jarFile.getAbsolutePath());
DiscoveredExtension discoveredExtension = discoverFromJar(jarFile);
List<DiscoveredExtension> extensionsToLoad = Collections.singletonList(discoveredExtension);
return loadExtensionList(extensionsToLoad);
}
private boolean loadExtensionList(List<DiscoveredExtension> extensionsToLoad) {
// ensure correct order of dependencies
LOGGER.debug("Reorder extensions to ensure proper load order");
extensionsToLoad = generateLoadOrder(extensionsToLoad);
loadDependencies(extensionsToLoad);
// setup new classloaders for the extensions to reload
for (DiscoveredExtension toReload : extensionsToLoad) {
LOGGER.debug("Setting up classloader for extension {}", toReload.getName());
setupClassLoader(toReload);
}
// setup code modifiers for these extensions
// TODO: it is possible the new modifiers cannot be applied (because the targeted classes are already loaded), should we issue a warning?
setupCodeModifiers(extensionsToLoad);
List<Extension> newExtensions = new LinkedList<>();
for (DiscoveredExtension toReload : extensionsToLoad) {
// reload extensions
LOGGER.info("Actually load extension {}", toReload.getName());
Extension loadedExtension = attemptSingleLoad(toReload);
if (loadedExtension != null) {
newExtensions.add(loadedExtension);
}
}
if (newExtensions.isEmpty()) {
LOGGER.error("No extensions to load, skipping callbacks");
return false;
}
LOGGER.info("Load complete, firing preinit, init and then postinit callbacks");
// retrigger preinit, init and postinit
newExtensions.forEach(Extension::preInitialize);
newExtensions.forEach(Extension::initialize);
newExtensions.forEach(Extension::postInitialize);
return true;
}
public void unloadExtension(String extensionName) {
Extension ext = extensions.get(extensionName.toLowerCase());
if (ext == null) {
throw new IllegalArgumentException("Extension " + extensionName + " is not currently loaded.");
}
List<String> dependents = new LinkedList<>(ext.getDescription().getDependents()); // copy dependents list
for (String dependentID : dependents) {
Extension dependentExt = extensions.get(dependentID.toLowerCase());
LOGGER.info("Unloading dependent extension {} (because it depends on {})", dependentID, extensionName);
unload(dependentExt);
}
LOGGER.info("Unloading extension {}", extensionName);
unload(ext);
// call GC to try to get rid of classes and classloader
System.gc();
}
}

2
src/main/java/net/minestom/server/extras/selfmodification/CodeModifier.java
View File

@ -3,7 +3,7 @@ package net.minestom.server.extras.selfmodification;
import org.objectweb.asm.tree.ClassNode;
/**
* Will be called by {@link MinestomOverwriteClassLoader} to transform classes at load-time
* Will be called by {@link MinestomRootClassLoader} to transform classes at load-time
*/
public abstract class CodeModifier {
/**

41
src/main/java/net/minestom/server/extras/selfmodification/HierarchyClassLoader.java Normal file
View File

@ -0,0 +1,41 @@
package net.minestom.server.extras.selfmodification;
import org.jetbrains.annotations.NotNull;
import java.io.InputStream;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.LinkedList;
import java.util.List;
/**
* Classloader part of a hierarchy of classloader
*/
public abstract class HierarchyClassLoader extends URLClassLoader {
protected final List<MinestomExtensionClassLoader> children = new LinkedList<>();
public HierarchyClassLoader(String name, URL[] urls, ClassLoader parent) {
super(name, urls, parent);
}
public void addChild(@NotNull MinestomExtensionClassLoader loader) {
children.add(loader);
}
public InputStream getResourceAsStreamWithChildren(String name) {
InputStream in = getResourceAsStream(name);
if(in != null) return in;
for(MinestomExtensionClassLoader child : children) {
InputStream childInput = child.getResourceAsStreamWithChildren(name);
if(childInput != null)
return childInput;
}
return null;
}
public void removeChildInHierarchy(MinestomExtensionClassLoader child) {
children.remove(child);
children.forEach(c -> c.removeChildInHierarchy(child));
}
}

76
src/main/java/net/minestom/server/extras/selfmodification/MinestomExtensionClassLoader.java Normal file
View File

@ -0,0 +1,76 @@
package net.minestom.server.extras.selfmodification;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
public class MinestomExtensionClassLoader extends HierarchyClassLoader {
/**
* Root ClassLoader, everything goes through it before any attempt at loading is done inside this classloader
*/
private final MinestomRootClassLoader root;
public MinestomExtensionClassLoader(String name, URL[] urls, MinestomRootClassLoader root) {
super(name, urls, root);
this.root = root;
}
@Override
public Class<?> loadClass(String name) throws ClassNotFoundException {
return root.loadClass(name);
}
@Override
protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
return root.loadClass(name, resolve);
}
/**
* Assumes the name is not null, nor it does represent a protected class
* @param name
* @return
* @throws ClassNotFoundException if the class is not found inside this classloader
*/
public Class<?> loadClassAsChild(String name, boolean resolve) throws ClassNotFoundException {
Class<?> loadedClass = findLoadedClass(name);
if(loadedClass != null) {
return loadedClass;
}
try {
// not in children, attempt load in this classloader
String path = name.replace(".", "/") + ".class";
InputStream in = getResourceAsStream(path);
if (in == null) {
throw new ClassNotFoundException("Could not load class " + name);
}
try (in) {
byte[] bytes = in.readAllBytes();
bytes = root.transformBytes(bytes, name);
Class<?> clazz = defineClass(name, bytes, 0, bytes.length);
if (resolve) {
resolveClass(clazz);
}
return clazz;
} catch (IOException e) {
throw new ClassNotFoundException("Could not load class " + name, e);
}
} catch (ClassNotFoundException e) {
for(MinestomExtensionClassLoader child : children) {
try {
Class<?> loaded = child.loadClassAsChild(name, resolve);
return loaded;
} catch (ClassNotFoundException e1) {
// move on to next child
}
}
throw e;
}
}
@Override
protected void finalize() throws Throwable {
super.finalize();
System.err.println("Class loader "+getName()+" finalized.");
}
}

90
src/main/java/net/minestom/server/extras/selfmodification/MinestomOverwriteClassLoader.java → src/main/java/net/minestom/server/extras/selfmodification/MinestomRootClassLoader.java
View File

@ -1,6 +1,5 @@
package net.minestom.server.extras.selfmodification;
import net.minestom.server.MinecraftServer;
import org.jetbrains.annotations.NotNull;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassWriter;
@ -10,6 +9,7 @@ import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.InvocationTargetException;
import java.net.MalformedURLException;
import java.net.URL;
@ -22,11 +22,11 @@ import java.util.Set;
/**
* Class Loader that can modify class bytecode when they are loaded
*/
public class MinestomOverwriteClassLoader extends URLClassLoader {
public class MinestomRootClassLoader extends HierarchyClassLoader {
public final static Logger LOGGER = LoggerFactory.getLogger(MinecraftServer.class);
public final static Logger LOGGER = LoggerFactory.getLogger(MinestomRootClassLoader.class);
private static MinestomOverwriteClassLoader INSTANCE;
private static MinestomRootClassLoader INSTANCE;
/**
* Classes that cannot be loaded/modified by this classloader.
@ -47,6 +47,7 @@ public class MinestomOverwriteClassLoader extends URLClassLoader {
add("org.apache");
add("org.spongepowered");
add("net.minestom.server.extras.selfmodification");
add("org.jboss.shrinkwrap.resolver");
}
};
/**
@ -62,16 +63,16 @@ public class MinestomOverwriteClassLoader extends URLClassLoader {
// TODO: priorities?
private final List<CodeModifier> modifiers = new LinkedList<>();
private MinestomOverwriteClassLoader(ClassLoader parent) {
super("Minestom ClassLoader", extractURLsFromClasspath(), parent);
private MinestomRootClassLoader(ClassLoader parent) {
super("Minestom Root ClassLoader", extractURLsFromClasspath(), parent);
asmClassLoader = newChild(new URL[0]);
}
public static MinestomOverwriteClassLoader getInstance() {
public static MinestomRootClassLoader getInstance() {
if (INSTANCE == null) {
synchronized (MinestomOverwriteClassLoader.class) {
synchronized (MinestomRootClassLoader.class) {
if (INSTANCE == null) {
INSTANCE = new MinestomOverwriteClassLoader(MinestomOverwriteClassLoader.class.getClassLoader());
INSTANCE = new MinestomRootClassLoader(MinestomRootClassLoader.class.getClassLoader());
}
}
}
@ -117,7 +118,7 @@ public class MinestomOverwriteClassLoader extends URLClassLoader {
return super.loadClass(name, resolve);
}
return define(name, loadBytes(name, true), resolve);
return define(name, resolve);
} catch (Exception ex) {
LOGGER.trace("Fail to load class, resorting to parent loader: " + name, ex);
// fail to load class, let parent load
@ -138,13 +139,29 @@ public class MinestomOverwriteClassLoader extends URLClassLoader {
return true;
}
private Class<?> define(String name, byte[] bytes, boolean resolve) {
Class<?> defined = defineClass(name, bytes, 0, bytes.length);
LOGGER.trace("Loaded with code modifiers: " + name);
if (resolve) {
resolveClass(defined);
private Class<?> define(String name, boolean resolve) throws IOException, ClassNotFoundException {
try {
byte[] bytes = loadBytes(name, true);
Class<?> defined = defineClass(name, bytes, 0, bytes.length);
LOGGER.trace("Loaded with code modifiers: " + name);
if (resolve) {
resolveClass(defined);
}
return defined;
} catch (ClassNotFoundException e) {
// could not load inside this classloader, attempt with children
Class<?> defined = null;
for(MinestomExtensionClassLoader subloader : children) {
try {
defined = subloader.loadClassAsChild(name, resolve);
LOGGER.trace("Loaded from child {}: {}", subloader, name);
return defined;
} catch (ClassNotFoundException e1) {
// not found inside this child, move on to next
}
}
throw e;
}
return defined;
}
/**
@ -160,9 +177,35 @@ public class MinestomOverwriteClassLoader extends URLClassLoader {
if (name == null)
throw new ClassNotFoundException();
String path = name.replace(".", "/") + ".class";
byte[] bytes = getResourceAsStream(path).readAllBytes();
if (transform && !isProtected(name)) {
ClassReader reader = new ClassReader(bytes);
InputStream input = getResourceAsStream(path);
if(input == null) {
throw new ClassNotFoundException("Could not find resource "+path);
}
byte[] originalBytes = input.readAllBytes();
if(transform) {
return transformBytes(originalBytes, name);
}
return originalBytes;
}
public byte[] loadBytesWithChildren(String name, boolean transform) throws IOException, ClassNotFoundException {
if (name == null)
throw new ClassNotFoundException();
String path = name.replace(".", "/") + ".class";
InputStream input = getResourceAsStreamWithChildren(path);
if(input == null) {
throw new ClassNotFoundException("Could not find resource "+path);
}
byte[] originalBytes = input.readAllBytes();
if(transform) {
return transformBytes(originalBytes, name);
}
return originalBytes;
}
byte[] transformBytes(byte[] classBytecode, String name) {
if (!isProtected(name)) {
ClassReader reader = new ClassReader(classBytecode);
ClassNode node = new ClassNode();
reader.accept(node, 0);
boolean modified = false;
@ -182,11 +225,11 @@ public class MinestomOverwriteClassLoader extends URLClassLoader {
}
};
node.accept(writer);
bytes = writer.toByteArray();
classBytecode = writer.toByteArray();
LOGGER.trace("Modified " + name);
}
}
return bytes;
return classBytecode;
}
// overriden to increase access (from protected to public)
@ -226,6 +269,11 @@ public class MinestomOverwriteClassLoader extends URLClassLoader {
}
}
@Override
public void addURL(URL url) {
super.addURL(url);
}
public List<CodeModifier> getModifiers() {
return modifiers;
}

8
src/main/java/net/minestom/server/extras/selfmodification/mixins/MinestomBytecodeProvider.java
View File

@ -1,6 +1,6 @@
package net.minestom.server.extras.selfmodification.mixins;
import net.minestom.server.extras.selfmodification.MinestomOverwriteClassLoader;
import net.minestom.server.extras.selfmodification.MinestomRootClassLoader;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.tree.ClassNode;
import org.spongepowered.asm.service.IClassBytecodeProvider;
@ -11,9 +11,9 @@ import java.io.IOException;
* Provides class bytecode for Mixin
*/
public class MinestomBytecodeProvider implements IClassBytecodeProvider {
private final MinestomOverwriteClassLoader classLoader;
private final MinestomRootClassLoader classLoader;
public MinestomBytecodeProvider(MinestomOverwriteClassLoader classLoader) {
public MinestomBytecodeProvider(MinestomRootClassLoader classLoader) {
this.classLoader = classLoader;
}
@ -26,7 +26,7 @@ public class MinestomBytecodeProvider implements IClassBytecodeProvider {
ClassNode node = new ClassNode();
ClassReader reader;
try {
reader = new ClassReader(classLoader.loadBytes(name, transform));
reader = new ClassReader(classLoader.loadBytesWithChildren(name, transform));
} catch (IOException e) {
throw new ClassNotFoundException("Could not load ClassNode with name " + name, e);
}

6
src/main/java/net/minestom/server/extras/selfmodification/mixins/MinestomClassProvider.java
View File

@ -1,6 +1,6 @@
package net.minestom.server.extras.selfmodification.mixins;
import net.minestom.server.extras.selfmodification.MinestomOverwriteClassLoader;
import net.minestom.server.extras.selfmodification.MinestomRootClassLoader;
import org.spongepowered.asm.service.IClassProvider;
import java.net.URL;
@ -9,9 +9,9 @@ import java.net.URL;
* Provides classes for Mixin
*/
public class MinestomClassProvider implements IClassProvider {
private final MinestomOverwriteClassLoader classLoader;
private final MinestomRootClassLoader classLoader;
public MinestomClassProvider(MinestomOverwriteClassLoader classLoader) {
public MinestomClassProvider(MinestomRootClassLoader classLoader) {
this.classLoader = classLoader;
}

8
src/main/java/net/minestom/server/extras/selfmodification/mixins/MixinServiceMinestom.java
View File

@ -1,6 +1,6 @@
package net.minestom.server.extras.selfmodification.mixins;
import net.minestom.server.extras.selfmodification.MinestomOverwriteClassLoader;
import net.minestom.server.extras.selfmodification.MinestomRootClassLoader;
import org.spongepowered.asm.launch.platform.container.ContainerHandleVirtual;
import org.spongepowered.asm.launch.platform.container.IContainerHandle;
import org.spongepowered.asm.mixin.MixinEnvironment;
@ -13,7 +13,7 @@ import java.util.Collections;
public class MixinServiceMinestom extends MixinServiceAbstract {
private final MinestomOverwriteClassLoader classLoader;
private final MinestomRootClassLoader classLoader;
private final MinestomClassProvider classProvider;
private final MinestomBytecodeProvider bytecodeProvider;
private final MixinAuditTrailMinestom auditTrail;
@ -22,7 +22,7 @@ public class MixinServiceMinestom extends MixinServiceAbstract {
public MixinServiceMinestom() {
INSTANCE = this;
this.classLoader = MinestomOverwriteClassLoader.getInstance();
this.classLoader = MinestomRootClassLoader.getInstance();
classProvider = new MinestomClassProvider(classLoader);
bytecodeProvider = new MinestomBytecodeProvider(classLoader);
auditTrail = new MixinAuditTrailMinestom();
@ -65,7 +65,7 @@ public class MixinServiceMinestom extends MixinServiceAbstract {
@Override
public InputStream getResourceAsStream(String name) {
return classLoader.getResourceAsStream(name);
return classLoader.getResourceAsStreamWithChildren(name);
}
@Override

8
src/main/java/net/minestom/server/listener/manager/PacketListenerManager.java
View File

@ -11,6 +11,7 @@ import org.jetbrains.annotations.NotNull;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
@ -93,8 +94,13 @@ public final class PacketListenerManager {
* @return true if the packet is not cancelled, false otherwise
*/
public <T extends ServerPacket> boolean processServerPacket(@NotNull T packet, @NotNull Player player) {
final List<PacketConsumer<ServerPacket>> consumers = CONNECTION_MANAGER.getSendPacketConsumers();
if (consumers.isEmpty()) {
return true;
}
final PacketController packetController = new PacketController();
for (PacketConsumer<ServerPacket> packetConsumer : CONNECTION_MANAGER.getSendPacketConsumers()) {
for (PacketConsumer<ServerPacket> packetConsumer : consumers) {
packetConsumer.accept(player, packetController, packet);
}

8
src/main/java/net/minestom/server/map/MapColors.java
View File

@ -123,10 +123,10 @@ public enum MapColors {
// From the wiki: https://minecraft.gamepedia.com/Map_item_format
// Map Color ID Multiply R,G,B By = Multiplier
//Base Color ID×4 + 0 180 0.71
//Base Color ID×4 + 1 220 0.86
//Base Color ID×4 + 2 255 (same color) 1
//Base Color ID×4 + 3 135 0.53
//Base Color ID*4 + 0 180 0.71
//Base Color ID*4 + 1 220 0.86
//Base Color ID*4 + 2 255 (same color) 1
//Base Color ID*4 + 3 135 0.53
/**
* Returns the color index with RGB multiplied by 0.53, to use on a map

6
src/main/java/net/minestom/server/network/ConnectionManager.java
View File

@ -145,11 +145,11 @@ public final class ConnectionManager {
/**
* Gets all the listeners which are called for each packet received.
*
* @return an unmodifiable list of packet's consumers
* @return a list of packet's consumers
*/
@NotNull
public List<PacketConsumer<ClientPlayPacket>> getReceivePacketConsumers() {
return Collections.unmodifiableList(receivePacketConsumers);
return receivePacketConsumers;
}
/**
@ -164,7 +164,7 @@ public final class ConnectionManager {
/**
* Gets all the listeners which are called for each packet sent.
*
* @return an unmodifiable list of packet's consumers
* @return a list of packet's consumers
*/
@NotNull
public List<PacketConsumer<ServerPacket>> getSendPacketConsumers() {

101
src/main/java/net/minestom/server/network/netty/NettyServer.java
View File

@ -12,7 +12,8 @@ import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.ServerSocketChannel;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.traffic.ChannelTrafficShapingHandler;
import io.netty.handler.traffic.GlobalChannelTrafficShapingHandler;
import io.netty.handler.traffic.TrafficCounter;
import net.minestom.server.network.PacketProcessor;
import net.minestom.server.network.netty.channel.ClientChannel;
import net.minestom.server.network.netty.codec.LegacyPingHandler;
@ -22,9 +23,14 @@ import net.minestom.server.network.netty.codec.PacketFramer;
import org.jetbrains.annotations.NotNull;
import java.net.InetSocketAddress;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
public class NettyServer {
private static final long DEFAULT_CHANNEL_WRITE_LIMIT = 600_000L;
private static final long DEFAULT_CHANNEL_READ_LIMIT = 100_000L;
private final EventLoopGroup boss, worker;
private final ServerBootstrap bootstrap;
@ -33,9 +39,12 @@ public class NettyServer {
private String address;
private int port;
// Options
private long writeLimit;
private long readLimit;
private final GlobalChannelTrafficShapingHandler globalTrafficHandler;
/**
* Scheduler used by {@code globalTrafficHandler}.
*/
private final ScheduledExecutorService trafficScheduler = Executors.newScheduledThreadPool(1);
public NettyServer(@NotNull PacketProcessor packetProcessor) {
Class<? extends ServerChannel> channel;
@ -61,19 +70,30 @@ public class NettyServer {
.group(boss, worker)
.channel(channel);
this.globalTrafficHandler = new GlobalChannelTrafficShapingHandler(trafficScheduler, 200) {
@Override
protected void doAccounting(TrafficCounter counter) {
// TODO proper monitoring API
//System.out.println("data " + counter.lastWriteThroughput() / 1000 + " " + counter.lastReadThroughput() / 1000);
}
};
globalTrafficHandler.setWriteChannelLimit(DEFAULT_CHANNEL_WRITE_LIMIT);
globalTrafficHandler.setReadChannelLimit(DEFAULT_CHANNEL_READ_LIMIT);
bootstrap.childHandler(new ChannelInitializer<SocketChannel>() {
protected void initChannel(@NotNull SocketChannel ch) {
ChannelConfig config = ch.config();
config.setOption(ChannelOption.TCP_NODELAY, true);
config.setOption(ChannelOption.SO_SNDBUF, 1_000_000);
ChannelPipeline pipeline = ch.pipeline();
ChannelTrafficShapingHandler channelTrafficShapingHandler =
new ChannelTrafficShapingHandler(writeLimit, readLimit, 200);
pipeline.addLast("traffic-limiter", channelTrafficShapingHandler);
pipeline.addLast("traffic-limiter", globalTrafficHandler);
// First check should verify if the packet is a legacy ping (from 1.6 version and earlier)
// Removed from the pipeline later in LegacyPingHandler if unnecessary (>1.6)
pipeline.addLast("legacy-ping", new LegacyPingHandler());
// Adds packetLength at start | Reads framed bytebuf
@ -90,7 +110,13 @@ public class NettyServer {
});
}
public void start(String address, int port) {
/**
* Binds the address to start the server.
*
* @param address the server address
* @param port the server port
*/
public void start(@NotNull String address, int port) {
this.address = address;
this.port = port;
@ -126,58 +152,27 @@ public class NettyServer {
}
/**
* Gets the server write limit.
* Gets the traffic handler, used to control channel and global bandwidth.
* <p>
* Used when you want to limit the bandwidth used by a single connection.
* Can also prevent the networking threads from being unresponsive.
* The object can be modified as specified by Netty documentation.
*
* @return the write limit in bytes
* @return the global traffic handler
*/
public long getWriteLimit() {
return writeLimit;
@NotNull
public GlobalChannelTrafficShapingHandler getGlobalTrafficHandler() {
return globalTrafficHandler;
}
/**
* Changes the server write limit
* <p>
* WARNING: the change will only apply to new connections, the current ones will not be updated.
*
* @param writeLimit the new write limit in bytes, 0 to disable
* @see #getWriteLimit()
* Stops the server and the various services.
*/
public void setWriteLimit(long writeLimit) {
this.writeLimit = writeLimit;
}
/**
* Gets the server read limit.
* <p>
* Used when you want to limit the bandwidth used by a single connection.
* Can also prevent the networking threads from being unresponsive.
*
* @return the read limit in bytes
*/
public long getReadLimit() {
return readLimit;
}
/**
* Changes the server read limit
* <p>
* WARNING: the change will only apply to new connections, the current ones will not be updated.
*
* @param readLimit the new read limit in bytes, 0 to disable
* @see #getWriteLimit()
*/
public void setReadLimit(long readLimit) {
this.readLimit = readLimit;
}
public void stop() {
serverChannel.close();
this.serverChannel.close();
worker.shutdownGracefully();
boss.shutdownGracefully();
this.worker.shutdownGracefully();
this.boss.shutdownGracefully();
this.trafficScheduler.shutdown();
this.globalTrafficHandler.release();
}
}

3
src/main/java/net/minestom/server/network/netty/codec/PacketDecoder.java
View File

@ -13,7 +13,8 @@ public class PacketDecoder extends ByteToMessageDecoder {
@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf buf, List<Object> list) {
if (buf.readableBytes() > 0) {
list.add(new InboundPacket(Utils.readVarInt(buf), buf));
final int packetId = Utils.readVarInt(buf);
list.add(new InboundPacket(packetId, buf));
}
}
}

20
src/main/java/net/minestom/server/network/player/NettyPlayerConnection.java
View File

@ -56,8 +56,16 @@ public class NettyPlayerConnection extends PlayerConnection {
this.remoteAddress = channel.remoteAddress();
}
@Override
public void update() {
// Flush
this.channel.eventLoop().execute(() -> channel.flush());
// Network stats
super.update();
}
/**
* Sets the encryption key and add the channels to the pipeline.
* Sets the encryption key and add the codecs to the pipeline.
*
* @param secretKey the secret key to use in the encryption
* @throws IllegalStateException if encryption is already enabled for this connection
@ -65,12 +73,12 @@ public class NettyPlayerConnection extends PlayerConnection {
public void setEncryptionKey(@NotNull SecretKey secretKey) {
Check.stateCondition(encrypted, "Encryption is already enabled!");
this.encrypted = true;
getChannel().pipeline().addBefore("framer", "decrypt", new Decrypter(MojangCrypt.getCipher(2, secretKey)));
getChannel().pipeline().addBefore("framer", "encrypt", new Encrypter(MojangCrypt.getCipher(1, secretKey)));
channel.pipeline().addBefore("framer", "decrypt", new Decrypter(MojangCrypt.getCipher(2, secretKey)));
channel.pipeline().addBefore("framer", "encrypt", new Encrypter(MojangCrypt.getCipher(1, secretKey)));
}
/**
* Enables compression and add a new channel to the pipeline.
* Enables compression and add a new codec to the pipeline.
*
* @param threshold the threshold for a packet to be compressible
* @throws IllegalStateException if encryption is already enabled for this connection
@ -93,9 +101,9 @@ public class NettyPlayerConnection extends PlayerConnection {
public void sendPacket(@NotNull ServerPacket serverPacket) {
if (shouldSendPacket(serverPacket)) {
if (getPlayer() != null) {
channel.write(serverPacket); // Flush on player update
this.channel.write(serverPacket); // Flush on player update
} else {
channel.writeAndFlush(serverPacket);
this.channel.writeAndFlush(serverPacket);
}
}
}

2
src/main/java/net/minestom/server/network/player/PlayerConnection.java
View File

@ -45,7 +45,7 @@ public abstract class PlayerConnection {
/**
* Updates values related to the network connection.
*/
public void updateStats() {
public void update() {
// Check rate limit
if (MinecraftServer.getRateLimit() > 0) {
tickCounter++;

6
src/main/java/net/minestom/server/storage/StorageLocation.java
View File

@ -93,9 +93,9 @@ public class StorageLocation {
Check.notNull(dataType, "You can only save registered DataType type!");
// Encode the data
BinaryWriter binaryWriter = new BinaryWriter();
dataType.encode(binaryWriter, object); // Encode
final byte[] encodedValue = binaryWriter.toByteArray(); // Retrieve bytes
BinaryWriter writer = new BinaryWriter();
dataType.encode(writer, object); // Encode
final byte[] encodedValue = writer.toByteArray(); // Retrieve bytes
// Write it
set(key, encodedValue);

1
src/main/java/net/minestom/server/utils/PacketUtils.java
View File

@ -74,6 +74,7 @@ public final class PacketUtils {
private static void writePacket(@NotNull ByteBuf buf, @NotNull ByteBuf packetBuffer, int packetId) {
Utils.writeVarIntBuf(buf, packetId);
buf.writeBytes(packetBuffer);
packetBuffer.release();
}
/**

12
src/main/java/net/minestom/server/utils/binary/BinaryWriter.java
View File

@ -7,6 +7,7 @@ import net.minestom.server.utils.BlockPosition;
import net.minestom.server.utils.NBTUtils;
import net.minestom.server.utils.SerializerUtils;
import net.minestom.server.utils.Utils;
import org.jetbrains.annotations.NotNull;
import org.jglrxavpok.hephaistos.nbt.NBT;
import org.jglrxavpok.hephaistos.nbt.NBTWriter;
@ -34,12 +35,21 @@ public class BinaryWriter extends OutputStream {
this.buffer = Unpooled.buffer(initialCapacity);
}
/**
* Creates a {@link BinaryWriter} from multiple a single buffer.
*
* @param buffer the writer buffer
*/
public BinaryWriter(@NotNull ByteBuf buffer) {
this.buffer = buffer;
}
/**
* Creates a {@link BinaryWriter} from multiple buffers.
*
* @param buffers the buffers making this
*/
public BinaryWriter(ByteBuf... buffers) {
public BinaryWriter(@NotNull ByteBuf... buffers) {
this.buffer = Unpooled.wrappedBuffer(buffers);
}

3
src/test/java/demo/Main.java
View File

@ -36,6 +36,9 @@ public class Main {
commandManager.register(new DimensionCommand());
commandManager.register(new ShutdownCommand());
commandManager.register(new TeleportCommand());
commandManager.register(new ReloadExtensionCommand());
commandManager.register(new UnloadExtensionCommand());
commandManager.register(new LoadExtensionCommand());
commandManager.setUnknownCommandCallback((sender, command) -> sender.sendMessage("unknown command"));

9
src/test/java/demo/MainDemo.java
View File

@ -6,7 +6,6 @@ import net.minestom.server.instance.*;
import net.minestom.server.instance.batch.ChunkBatch;
import net.minestom.server.instance.block.Block;
import net.minestom.server.network.ConnectionManager;
import net.minestom.server.network.netty.NettyServer;
import net.minestom.server.utils.Position;
import net.minestom.server.world.biomes.Biome;
@ -37,14 +36,6 @@ public class MainDemo {
});
});
// OPTIONAL: optimize networking to prevent having unresponsive threads
{
NettyServer nettyServer = MinecraftServer.getNettyServer();
// Set the maximum bandwidth out and in to 500KB/s, largely enough for a single client
nettyServer.setWriteLimit(500_000);
nettyServer.setReadLimit(500_000);
}
// Start the server
minecraftServer.start("localhost", 25565);
}

77
src/test/java/demo/commands/LoadExtensionCommand.java Normal file
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@ -0,0 +1,77 @@
package demo.commands;
import net.minestom.server.MinecraftServer;
import net.minestom.server.command.CommandSender;
import net.minestom.server.command.builder.Arguments;
import net.minestom.server.command.builder.Command;
import net.minestom.server.command.builder.arguments.Argument;
import net.minestom.server.command.builder.arguments.ArgumentType;
import net.minestom.server.extensions.ExtensionManager;
import java.io.IOException;
import java.nio.file.Path;
public class LoadExtensionCommand extends Command {
public LoadExtensionCommand() {
super("load");
setDefaultExecutor(this::usage);
Argument extension = ArgumentType.DynamicStringArray("extensionName");
setArgumentCallback(this::gameModeCallback, extension);
addSyntax(this::execute, extension);
}
private void usage(CommandSender sender, Arguments arguments) {
sender.sendMessage("Usage: /load <extension file name>");
}
private void execute(CommandSender sender, Arguments arguments) {
String name = join(arguments.getStringArray("extensionName"));
sender.sendMessage("extensionFile = "+name+"....");
ExtensionManager extensionManager = MinecraftServer.getExtensionManager();
Path extensionFolder = extensionManager.getExtensionFolder().toPath().toAbsolutePath();
Path extensionJar = extensionFolder.resolve(name);
try {
if(!extensionJar.toFile().getCanonicalPath().startsWith(extensionFolder.toFile().getCanonicalPath())) {
sender.sendMessage("File name '"+name+"' does not represent a file inside the extensions folder. Will not load");
return;
}
} catch (IOException e) {
e.printStackTrace();
sender.sendMessage("Failed to load extension: "+e.getMessage());
return;
}
try {
boolean managed = extensionManager.loadDynamicExtension(extensionJar.toFile());
if(managed) {
sender.sendMessage("Extension loaded!");
} else {
sender.sendMessage("Failed to load extension, check your logs.");
}
} catch (Exception e) {
e.printStackTrace();
sender.sendMessage("Failed to load extension: "+e.getMessage());
}
}
private void gameModeCallback(CommandSender sender, String extension, int error) {
sender.sendMessage("'" + extension + "' is not a valid extension name!");
}
private String join(String[] extensionNameParts) {
StringBuilder b = new StringBuilder();
for (int i = 0; i < extensionNameParts.length; i++) {
String s = extensionNameParts[i];
if(i != 0) {
b.append(" ");
}
b.append(s);
}
return b.toString();
}
}

98
src/test/java/demo/commands/ReloadExtensionCommand.java Normal file
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@ -0,0 +1,98 @@
package demo.commands;
import net.minestom.server.MinecraftServer;
import net.minestom.server.command.CommandSender;
import net.minestom.server.command.builder.Arguments;
import net.minestom.server.command.builder.Command;
import net.minestom.server.command.builder.arguments.Argument;
import net.minestom.server.command.builder.arguments.ArgumentType;
import net.minestom.server.extensions.Extension;
import net.minestom.server.extensions.ExtensionManager;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.stream.Collectors;
public class ReloadExtensionCommand extends Command {
// the extensions name as an array
private static String[] extensionsName;
static {
List<String> extensionsName = MinecraftServer.getExtensionManager().getExtensions()
.stream()
.map(extension -> extension.getDescription().getName())
.collect(Collectors.toList());
ReloadExtensionCommand.extensionsName = extensionsName.toArray(new String[0]);
}
public ReloadExtensionCommand() {
super("reload");
setDefaultExecutor(this::usage);
Argument extension = ArgumentType.DynamicStringArray("extensionName");
setArgumentCallback(this::gameModeCallback, extension);
addSyntax(this::execute, extension);
}
private void usage(CommandSender sender, Arguments arguments) {
sender.sendMessage("Usage: /reload <extension name>");
}
private void execute(CommandSender sender, Arguments arguments) {
String name = join(arguments.getStringArray("extensionName"));
sender.sendMessage("extensionName = " + name + "....");
ExtensionManager extensionManager = MinecraftServer.getExtensionManager();
Extension ext = extensionManager.getExtension(name);
if (ext != null) {
try {
extensionManager.reload(name);
} catch (Throwable t) {
try {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
t.printStackTrace();
t.printStackTrace(new PrintStream(baos));
baos.flush();
baos.close();
String contents = new String(baos.toByteArray(), StandardCharsets.UTF_8);
contents.lines().forEach(sender::sendMessage);
} catch (IOException e) {
e.printStackTrace();
}
}
} else {
sender.sendMessage("Extension '" + name + "' does not exist.");
}
}
private void gameModeCallback(CommandSender sender, String extension, int error) {
sender.sendMessage("'" + extension + "' is not a valid extension name!");
}
@Nullable
@Override
public String[] onDynamicWrite(@NotNull String text) {
return extensionsName;
}
private String join(String[] extensionNameParts) {
StringBuilder b = new StringBuilder();
for (int i = 0; i < extensionNameParts.length; i++) {
String s = extensionNameParts[i];
if (i != 0) {
b.append(" ");
}
b.append(s);
}
return b.toString();
}
}

4
src/test/java/demo/commands/TestCommand.java
View File

@ -5,6 +5,7 @@ import net.minestom.server.command.builder.Arguments;
import net.minestom.server.command.builder.Command;
import net.minestom.server.command.builder.arguments.Argument;
import net.minestom.server.command.builder.arguments.ArgumentType;
import net.minestom.server.entity.Player;
public class TestCommand extends Command {
@ -19,11 +20,12 @@ public class TestCommand extends Command {
});
setDefaultExecutor((source, args) -> {
System.out.println("DEFAULT");
System.gc();
source.sendMessage("Explicit GC executed!");
});
addSyntax((source, args) -> {
Player player = (Player) source;
System.out.println("ARG 1");
}, test);
}

76
src/test/java/demo/commands/UnloadExtensionCommand.java Normal file
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@ -0,0 +1,76 @@
package demo.commands;
import net.minestom.server.MinecraftServer;
import net.minestom.server.command.CommandSender;
import net.minestom.server.command.builder.Arguments;
import net.minestom.server.command.builder.Command;
import net.minestom.server.command.builder.arguments.Argument;
import net.minestom.server.command.builder.arguments.ArgumentType;
import net.minestom.server.extensions.Extension;
import net.minestom.server.extensions.ExtensionManager;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.nio.charset.StandardCharsets;
public class UnloadExtensionCommand extends Command {
public UnloadExtensionCommand() {
super("unload");
setDefaultExecutor(this::usage);
Argument extension = ArgumentType.DynamicStringArray("extensionName");
setArgumentCallback(this::gameModeCallback, extension);
addSyntax(this::execute, extension);
}
private void usage(CommandSender sender, Arguments arguments) {
sender.sendMessage("Usage: /unload <extension name>");
}
private void execute(CommandSender sender, Arguments arguments) {
String name = join(arguments.getStringArray("extensionName"));
sender.sendMessage("extensionName = "+name+"....");
ExtensionManager extensionManager = MinecraftServer.getExtensionManager();
Extension ext = extensionManager.getExtension(name);
if(ext != null) {
try {
extensionManager.unloadExtension(name);
} catch (Throwable t) {
try {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
t.printStackTrace();
t.printStackTrace(new PrintStream(baos));
baos.flush();
baos.close();
String contents = new String(baos.toByteArray(), StandardCharsets.UTF_8);
contents.lines().forEach(sender::sendMessage);
} catch (IOException e) {
e.printStackTrace();
}
}
} else {
sender.sendMessage("Extension '"+name+"' does not exist.");
}
}
private void gameModeCallback(CommandSender sender, String extension, int error) {
sender.sendMessage("'" + extension + "' is not a valid extension name!");
}
private String join(String[] extensionNameParts) {
StringBuilder b = new StringBuilder();
for (int i = 0; i < extensionNameParts.length; i++) {
String s = extensionNameParts[i];
if(i != 0) {
b.append(" ");
}
b.append(s);
}
return b.toString();
}
}

11
src/test/java/testextension/TestDemoLauncher.java Normal file
View File

@ -0,0 +1,11 @@
package testextension;
import net.minestom.server.Bootstrap;
public class TestDemoLauncher {
public static void main(String[] args) {
Bootstrap.bootstrap("demo.Main", args);
}
}

2
src/test/java/testextension/TestExtensionLauncherArgs.java
View File

@ -11,7 +11,7 @@ public class TestExtensionLauncherArgs {
System.arraycopy(args, 0, argsWithMixins, 0, args.length);
argsWithMixins[argsWithMixins.length-2] = "--mixin";
argsWithMixins[argsWithMixins.length-1] = "mixins.testextension.json";
Bootstrap.bootstrap("fr.themode.demo.MainDemo", argsWithMixins);
Bootstrap.bootstrap("demo.MainDemo", argsWithMixins);
}
}

2
src/test/java/testextension/TestExtensionLauncherNoSetup.java
View File

@ -9,7 +9,7 @@ import org.spongepowered.asm.mixin.Mixins;
public class TestExtensionLauncherNoSetup {
public static void main(String[] args) {
Bootstrap.bootstrap("fr.themode.demo.MainDemo", args);
Bootstrap.bootstrap("demo.MainDemo", args);
}
}

2
src/test/java/testextension/mixins/DynamicChunkMixin.java
View File

@ -9,7 +9,7 @@ import org.spongepowered.asm.mixin.injection.ModifyVariable;
@Mixin(DynamicChunk.class)
public class DynamicChunkMixin {
@ModifyVariable(method = "setBlock", at = @At("HEAD"), index = 4, require = 1, argsOnly = true, remap = false)
@ModifyVariable(method = "UNSAFE_setBlock", at = @At("HEAD"), index = 4, require = 1, argsOnly = true, remap = false)
public short oopsAllTnt(short blockStateId) {
if(blockStateId != 0)
return Block.TNT.getBlockId();

2
src/test/resources/extension.json
View File

@ -1,6 +1,6 @@
{
"entrypoint": "testextension.TestExtension",
"name": "Test extension",
"name": "Test_extension",
"codeModifiers": [
"testextension.TestModifier"
],