mirror of
https://github.com/LuckPerms/LuckPerms.git
synced 2024-11-24 11:38:40 +01:00
Refactor file watcher
This commit is contained in:
Luck
parent
2ed45c92a6
commit
5ce8217cd5
@ -50,7 +50,7 @@ import me.lucko.luckperms.common.sender.Sender;
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import me.lucko.luckperms.common.storage.Storage;
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import me.lucko.luckperms.common.storage.StorageFactory;
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import me.lucko.luckperms.common.storage.StorageType;
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import me.lucko.luckperms.common.storage.implementation.file.FileWatcher;
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import me.lucko.luckperms.common.storage.implementation.file.watcher.FileWatcher;
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import me.lucko.luckperms.common.tasks.SyncTask;
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import me.lucko.luckperms.common.treeview.PermissionRegistry;
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import me.lucko.luckperms.common.verbose.VerboseHandler;
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@ -232,7 +232,7 @@ public abstract class AbstractLuckPermsPlugin implements LuckPermsPlugin {
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// close file watcher
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if (this.fileWatcher != null) {
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this.fileWatcher.close();
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//this.fileWatcher.close();
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}
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// unregister api
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@ -49,7 +49,7 @@ import me.lucko.luckperms.common.plugin.logging.PluginLogger;
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import me.lucko.luckperms.common.plugin.util.AbstractConnectionListener;
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import me.lucko.luckperms.common.sender.Sender;
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import me.lucko.luckperms.common.storage.Storage;
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import me.lucko.luckperms.common.storage.implementation.file.FileWatcher;
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import me.lucko.luckperms.common.storage.implementation.file.watcher.FileWatcher;
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import me.lucko.luckperms.common.tasks.SyncTask;
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import me.lucko.luckperms.common.treeview.PermissionRegistry;
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import me.lucko.luckperms.common.verbose.VerboseHandler;
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@ -30,6 +30,7 @@ import me.lucko.luckperms.common.bulkupdate.comparison.Constraint;
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import me.lucko.luckperms.common.node.model.HeldNodeImpl;
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import me.lucko.luckperms.common.plugin.LuckPermsPlugin;
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import me.lucko.luckperms.common.storage.implementation.file.loader.ConfigurateLoader;
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import me.lucko.luckperms.common.storage.implementation.file.watcher.FileWatcher;
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import me.lucko.luckperms.common.util.Iterators;
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import net.luckperms.api.node.HeldNode;
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@ -1,209 +0,0 @@
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/*
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* This file is part of LuckPerms, licensed under the MIT License.
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*
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* Copyright (c) lucko (Luck) <luck@lucko.me>
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* Copyright (c) contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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package me.lucko.luckperms.common.storage.implementation.file;
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import me.lucko.luckperms.common.plugin.LuckPermsPlugin;
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import me.lucko.luckperms.common.util.Iterators;
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import java.io.IOException;
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import java.nio.file.Path;
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import java.nio.file.StandardWatchEventKinds;
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import java.nio.file.WatchEvent;
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import java.nio.file.WatchKey;
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import java.nio.file.WatchService;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.concurrent.CopyOnWriteArrayList;
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import java.util.concurrent.TimeUnit;
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import java.util.function.Consumer;
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public class FileWatcher {
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@SuppressWarnings("unchecked")
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private static final WatchEvent.Kind<Path>[] KINDS = new WatchEvent.Kind[]{
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StandardWatchEventKinds.ENTRY_CREATE,
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StandardWatchEventKinds.ENTRY_DELETE,
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StandardWatchEventKinds.ENTRY_MODIFY
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};
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private final Path basePath;
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private final Map<Path, WatchedLocation> watchedLocations;
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// the watchservice instance
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private final WatchService watchService;
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private boolean initialised = false;
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public FileWatcher(LuckPermsPlugin plugin, Path basePath) throws IOException {
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this.watchedLocations = Collections.synchronizedMap(new HashMap<>());
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this.basePath = basePath;
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this.watchService = basePath.getFileSystem().newWatchService();
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plugin.getBootstrap().getScheduler().asyncLater(this::initLocations, 5, TimeUnit.SECONDS);
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plugin.getBootstrap().getScheduler().asyncRepeating(this::tick, 1, TimeUnit.SECONDS);
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}
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public WatchedLocation getWatcher(Path path) {
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Path relativePath = this.basePath.relativize(path);
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return this.watchedLocations.computeIfAbsent(relativePath, p -> new WatchedLocation(this, p));
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}
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public void close() {
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if (this.watchService == null) {
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return;
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}
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try {
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this.watchService.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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private void initLocations() {
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for (WatchedLocation loc : this.watchedLocations.values()) {
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try {
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loc.setup();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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this.initialised = true;
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}
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private void tick() {
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List<Path> expired = new ArrayList<>();
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for (Map.Entry<Path, WatchedLocation> ent : this.watchedLocations.entrySet()) {
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boolean valid = ent.getValue().tick();
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if (!valid) {
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new RuntimeException("WatchKey no longer valid: " + ent.getKey().toString()).printStackTrace();
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expired.add(ent.getKey());
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}
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}
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expired.forEach(this.watchedLocations::remove);
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}
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private static boolean isFileTemporary(String fileName) {
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return fileName.endsWith(".tmp") || fileName.endsWith(".swp") || fileName.endsWith(".swx") || fileName.endsWith(".swpz");
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}
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/**
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* Encapsulates a "watcher" in a specific directory.
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*/
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public final class WatchedLocation {
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// the parent watcher
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private final FileWatcher watcher;
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// the absolute path to the directory being watched
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private final Path absolutePath;
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// the times of recent changes
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private final Map<String, Long> lastChange = Collections.synchronizedMap(new HashMap<>());
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// if the key is registered
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private boolean ready = false;
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// the watch key
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private WatchKey key = null;
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// the callback functions
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private final List<Consumer<Path>> callbacks = new CopyOnWriteArrayList<>();
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private WatchedLocation(FileWatcher watcher, Path relativePath) {
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this.watcher = watcher;
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this.absolutePath = this.watcher.basePath.resolve(relativePath);
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}
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private synchronized void setup() throws IOException {
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if (this.ready) {
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return;
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}
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this.key = this.absolutePath.register(this.watcher.watchService, KINDS);
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this.ready = true;
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}
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private boolean tick() {
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if (!this.ready) {
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// await init
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if (!FileWatcher.this.initialised) {
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return true;
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}
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try {
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setup();
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return true;
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} catch (IOException e) {
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e.printStackTrace();
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return false;
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}
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}
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// remove old change entries.
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long expireTime = System.currentTimeMillis() - TimeUnit.SECONDS.toMillis(4);
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this.lastChange.values().removeIf(lastChange -> lastChange < expireTime);
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List<WatchEvent<?>> watchEvents = this.key.pollEvents();
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for (WatchEvent<?> event : watchEvents) {
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Path context = (Path) event.context();
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if (context == null) {
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continue;
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}
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String fileName = context.toString();
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// ignore temporary changes
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if (isFileTemporary(fileName)) {
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continue;
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}
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// ignore changes already registered to the system
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if (this.lastChange.containsKey(fileName)) {
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continue;
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}
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this.lastChange.put(fileName, System.currentTimeMillis());
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// process the change
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Iterators.tryIterate(this.callbacks, cb -> cb.accept(context));
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}
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// reset the watch key.
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return this.key.reset();
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}
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public void recordChange(String fileName) {
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this.lastChange.put(fileName, System.currentTimeMillis());
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}
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public void addListener(Consumer<Path> updateConsumer) {
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this.callbacks.add(updateConsumer);
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}
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}
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}
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@ -31,6 +31,7 @@ import me.lucko.luckperms.common.model.User;
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import me.lucko.luckperms.common.node.model.HeldNodeImpl;
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import me.lucko.luckperms.common.plugin.LuckPermsPlugin;
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import me.lucko.luckperms.common.storage.implementation.file.loader.ConfigurateLoader;
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import me.lucko.luckperms.common.storage.implementation.file.watcher.FileWatcher;
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import me.lucko.luckperms.common.util.Iterators;
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import me.lucko.luckperms.common.util.MoreFiles;
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import me.lucko.luckperms.common.util.Uuids;
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@ -0,0 +1,189 @@
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/*
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* This file is part of LuckPerms, licensed under the MIT License.
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*
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* Copyright (c) lucko (Luck) <luck@lucko.me>
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* Copyright (c) contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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package me.lucko.luckperms.common.storage.implementation.file.watcher;
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import java.io.IOException;
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import java.nio.file.ClosedWatchServiceException;
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import java.nio.file.FileSystem;
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import java.nio.file.FileVisitResult;
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import java.nio.file.Files;
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import java.nio.file.LinkOption;
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import java.nio.file.Path;
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import java.nio.file.SimpleFileVisitor;
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import java.nio.file.StandardWatchEventKinds;
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import java.nio.file.WatchEvent;
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import java.nio.file.WatchKey;
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import java.nio.file.WatchService;
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import java.nio.file.attribute.BasicFileAttributes;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.concurrent.atomic.AtomicReference;
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/**
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* Utility for "watching" for file changes using a {@link WatchService}.
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*/
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public abstract class AbstractFileWatcher implements AutoCloseable {
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/**
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* Get a {@link WatchKey} from the given {@link WatchService} in the given {@link Path directory}.
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*
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* @param watchService the watch service
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* @param directory the directory
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* @return the watch key
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* @throws IOException if unable to register
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*/
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private static WatchKey register(WatchService watchService, Path directory) throws IOException {
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return directory.register(watchService, StandardWatchEventKinds.ENTRY_CREATE, StandardWatchEventKinds.ENTRY_DELETE, StandardWatchEventKinds.ENTRY_MODIFY);
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}
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/** The watch service */
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private final WatchService service;
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/** A map of all registered watch keys */
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private final Map<WatchKey, Path> keys = Collections.synchronizedMap(new HashMap<>());
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/** If this file watcher should discover directories */
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private final boolean autoRegisterNewSubDirectories;
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/** The thread currently being used to wait for & process watch events */
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private AtomicReference<Thread> processingThread = new AtomicReference<>();
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public AbstractFileWatcher(FileSystem fileSystem, boolean autoRegisterNewSubDirectories) throws IOException {
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this.service = fileSystem.newWatchService();
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this.autoRegisterNewSubDirectories = autoRegisterNewSubDirectories;
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}
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/**
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* Register a watch key in the given directory.
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*
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* @param directory the directory
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* @throws IOException if unable to register a key
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*/
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public void register(Path directory) throws IOException {
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final WatchKey key = register(this.service, directory);
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this.keys.put(key, directory);
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}
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/**
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* Register a watch key recursively in the given directory.
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*
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* @param root the root directory
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* @throws IOException if unable to register a key
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*/
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public void registerRecursively(Path root) throws IOException {
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Files.walkFileTree(root, new SimpleFileVisitor<Path>() {
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@Override
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public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {
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register(dir);
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return super.preVisitDirectory(dir, attrs);
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}
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});
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}
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/**
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* Process an observed watch event.
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*
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* @param event the event
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* @param path the resolved event context
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*/
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protected abstract void processEvent(WatchEvent<Path> event, Path path);
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/**
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* Processes {@link WatchEvent}s from the watch service until it is closed, or until
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* the thread is interrupted.
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*/
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public final void runEventProcessingLoop() {
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if (!this.processingThread.compareAndSet(null, Thread.currentThread())) {
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throw new IllegalStateException("A thread is already processing events for this watcher.");
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}
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while (true) {
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// poll for a key from the watch service
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WatchKey key;
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try {
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key = this.service.take();
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} catch (InterruptedException e) {
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e.printStackTrace();
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break;
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} catch (ClosedWatchServiceException e) {
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break;
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}
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// find the directory the key is watching
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Path directory = this.keys.get(key);
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if (directory == null) {
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key.cancel();
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continue;
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}
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// process each watch event the key has
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for (WatchEvent<?> ev : key.pollEvents()) {
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@SuppressWarnings("unchecked")
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WatchEvent<Path> event = (WatchEvent<Path>) ev;
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Path context = event.context();
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// ignore contexts with a name count of zero
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if (context.getNameCount() == 0) {
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continue;
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}
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// resolve the context of the event against the directory being watched
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Path file = directory.resolve(context);
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// if the file is a regular file, send the event on to be processed
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if (Files.isRegularFile(file)) {
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processEvent(event, file);
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}
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// handle recursive directory creation
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if (this.autoRegisterNewSubDirectories && event.kind() == StandardWatchEventKinds.ENTRY_CREATE) {
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try {
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if (Files.isDirectory(file, LinkOption.NOFOLLOW_LINKS)) {
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registerRecursively(file);
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}
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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// reset the key
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boolean valid = key.reset();
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if (!valid) {
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this.keys.remove(key);
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}
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}
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this.processingThread.compareAndSet(Thread.currentThread(), null);
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}
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@Override
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public void close() throws IOException {
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this.service.close();
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}
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}
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@ -0,0 +1,143 @@
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/*
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* This file is part of LuckPerms, licensed under the MIT License.
|
||||
*
|
||||
* Copyright (c) lucko (Luck) <luck@lucko.me>
|
||||
* Copyright (c) contributors
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in all
|
||||
* copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
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* SOFTWARE.
|
||||
*/
|
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|
||||
package me.lucko.luckperms.common.storage.implementation.file.watcher;
|
||||
|
||||
import me.lucko.luckperms.common.plugin.LuckPermsPlugin;
|
||||
import me.lucko.luckperms.common.util.ExpiringSet;
|
||||
import me.lucko.luckperms.common.util.Iterators;
|
||||
|
||||
import java.io.IOException;
|
||||
import java.nio.file.Path;
|
||||
import java.nio.file.WatchEvent;
|
||||
import java.util.Collections;
|
||||
import java.util.HashMap;
|
||||
import java.util.List;
|
||||
import java.util.Map;
|
||||
import java.util.Set;
|
||||
import java.util.concurrent.CopyOnWriteArrayList;
|
||||
import java.util.concurrent.TimeUnit;
|
||||
import java.util.function.Consumer;
|
||||
|
||||
/**
|
||||
* Simple implementation of {@link AbstractFileWatcher} for LuckPerms data files.
|
||||
*/
|
||||
public class FileWatcher extends AbstractFileWatcher {
|
||||
|
||||
/** The base watched path */
|
||||
private final Path basePath;
|
||||
|
||||
/** A map of watched locations with corresponding listeners */
|
||||
private final Map<Path, WatchedLocation> watchedLocations;
|
||||
|
||||
public FileWatcher(LuckPermsPlugin plugin, Path basePath) throws IOException {
|
||||
super(basePath.getFileSystem(), true);
|
||||
this.watchedLocations = Collections.synchronizedMap(new HashMap<>());
|
||||
this.basePath = basePath;
|
||||
|
||||
super.registerRecursively(basePath);
|
||||
plugin.getBootstrap().getScheduler().executeAsync(super::runEventProcessingLoop);
|
||||
}
|
||||
|
||||
/**
|
||||
* Gets a {@link WatchedLocation} instance for a given path.
|
||||
*
|
||||
* @param path the path to get a watcher for
|
||||
* @return the watched location
|
||||
*/
|
||||
public WatchedLocation getWatcher(Path path) {
|
||||
if (path.isAbsolute()) {
|
||||
path = this.basePath.relativize(path);
|
||||
}
|
||||
return this.watchedLocations.computeIfAbsent(path, WatchedLocation::new);
|
||||
}
|
||||
|
||||
@Override
|
||||
protected void processEvent(WatchEvent<Path> event, Path path) {
|
||||
// get the relative path of the event
|
||||
Path relativePath = this.basePath.relativize(path);
|
||||
if (relativePath.getNameCount() == 0) {
|
||||
return;
|
||||
}
|
||||
|
||||
// pass the event onto all watched locations that match
|
||||
for (Map.Entry<Path, WatchedLocation> entry : this.watchedLocations.entrySet()) {
|
||||
if (relativePath.startsWith(entry.getKey())) {
|
||||
entry.getValue().onEvent(event, relativePath);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Encapsulates a "watcher" in a specific directory.
|
||||
*/
|
||||
public static final class WatchedLocation {
|
||||
/** The directory being watched by this instance. */
|
||||
private final Path path;
|
||||
|
||||
/** A set of files which have been modified recently */
|
||||
private final Set<String> recentlyModifiedFiles = new ExpiringSet<>(4, TimeUnit.SECONDS);
|
||||
|
||||
/** The listener callback functions */
|
||||
private final List<Consumer<Path>> callbacks = new CopyOnWriteArrayList<>();
|
||||
|
||||
WatchedLocation(Path path) {
|
||||
this.path = path;
|
||||
}
|
||||
|
||||
void onEvent(WatchEvent<Path> event, Path path) {
|
||||
// get the relative path of the modified file
|
||||
Path relativePath = this.path.relativize(path);
|
||||
|
||||
// check if the file has been modified recently
|
||||
String fileName = relativePath.toString();
|
||||
if (!this.recentlyModifiedFiles.add(fileName)) {
|
||||
return;
|
||||
}
|
||||
|
||||
// pass the event onto registered listeners
|
||||
Iterators.tryIterate(this.callbacks, cb -> cb.accept(relativePath));
|
||||
}
|
||||
|
||||
/**
|
||||
* Record that a file has been changed recently.
|
||||
*
|
||||
* @param fileName the name of the file
|
||||
*/
|
||||
public void recordChange(String fileName) {
|
||||
this.recentlyModifiedFiles.add(fileName);
|
||||
}
|
||||
|
||||
/**
|
||||
* Register a listener.
|
||||
*
|
||||
* @param listener the listener
|
||||
*/
|
||||
public void addListener(Consumer<Path> listener) {
|
||||
this.callbacks.add(listener);
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
@ -28,9 +28,7 @@ package me.lucko.luckperms.common.util;
|
||||
import com.github.benmanes.caffeine.cache.Cache;
|
||||
import com.google.common.collect.ForwardingSet;
|
||||
|
||||
import org.checkerframework.checker.nullness.qual.NonNull;
|
||||
|
||||
import java.util.Collection;
|
||||
import java.util.Collections;
|
||||
import java.util.Set;
|
||||
import java.util.concurrent.TimeUnit;
|
||||
|
||||
@ -40,46 +38,11 @@ import java.util.concurrent.TimeUnit;
|
||||
* @param <E> element type
|
||||
*/
|
||||
public class ExpiringSet<E> extends ForwardingSet<E> {
|
||||
private final Cache<E, Boolean> cache;
|
||||
private final Set<E> setView;
|
||||
|
||||
public ExpiringSet(long duration, TimeUnit unit) {
|
||||
this.cache = CaffeineFactory.newBuilder().expireAfterAccess(duration, unit).build();
|
||||
this.setView = this.cache.asMap().keySet();
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean add(@NonNull E element) {
|
||||
this.cache.put(element, Boolean.TRUE);
|
||||
|
||||
// we don't care about the return value
|
||||
return true;
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean addAll(@NonNull Collection<? extends E> collection) {
|
||||
for (E element : collection) {
|
||||
add(element);
|
||||
}
|
||||
|
||||
// we don't care about the return value
|
||||
return true;
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean remove(@NonNull Object key) {
|
||||
this.cache.invalidate(key);
|
||||
|
||||
// we don't care about the return value
|
||||
return true;
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean removeAll(@NonNull Collection<?> keys) {
|
||||
this.cache.invalidateAll(keys);
|
||||
|
||||
// we don't care about the return value
|
||||
return true;
|
||||
Cache<E, Boolean> cache = CaffeineFactory.newBuilder().expireAfterAccess(duration, unit).build();
|
||||
this.setView = Collections.newSetFromMap(cache.asMap());
|
||||
}
|
||||
|
||||
@Override
|
||||
|
||||
Loading…
Reference in New Issue
Block a user