158 lines
6.1 KiB
Java
158 lines
6.1 KiB
Java
/*
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* This file is part of BlueMap, licensed under the MIT License (MIT).
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*
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* Copyright (c) Blue (Lukas Rieger) <https://bluecolored.de>
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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
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* all 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
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* THE SOFTWARE.
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*/
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package de.bluecolored.bluemap.common.plugin;
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import com.flowpowered.math.vector.Vector2i;
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import de.bluecolored.bluemap.api.debug.DebugDump;
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import de.bluecolored.bluemap.common.rendermanager.RenderManager;
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import de.bluecolored.bluemap.common.rendermanager.WorldRegionRenderTask;
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import de.bluecolored.bluemap.core.logger.Logger;
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import de.bluecolored.bluemap.core.map.BmMap;
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import de.bluecolored.bluemap.core.util.FileHelper;
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import de.bluecolored.bluemap.core.world.World;
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import de.bluecolored.bluemap.core.world.mca.MCAWorld;
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import java.io.IOException;
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import java.nio.file.*;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Timer;
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import java.util.TimerTask;
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public class RegionFileWatchService extends Thread {
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private final BmMap map;
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private final RenderManager renderManager;
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private final WatchService watchService;
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private volatile boolean closed;
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private Timer delayTimer;
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@DebugDump
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private final Map<Vector2i, TimerTask> scheduledUpdates;
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public RegionFileWatchService(RenderManager renderManager, BmMap map) throws IOException {
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this.renderManager = renderManager;
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this.map = map;
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this.closed = false;
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this.scheduledUpdates = new HashMap<>();
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World world = map.getWorld();
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if (!(world instanceof MCAWorld)) throw new UnsupportedOperationException("world-type is not supported");
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Path folder = ((MCAWorld) world).getRegionFolder();
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FileHelper.createDirectories(folder);
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this.watchService = folder.getFileSystem().newWatchService();
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folder.register(this.watchService, StandardWatchEventKinds.ENTRY_CREATE, StandardWatchEventKinds.ENTRY_MODIFY);
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Logger.global.logDebug("Created region-file watch-service for map '" + map.getId() + "' at '" + folder + "'.");
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}
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@Override
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public void run() {
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if (delayTimer == null) delayTimer = new Timer("BlueMap-RegionFileWatchService-DelayTimer", true);
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Logger.global.logDebug("Started watching map '" + map.getId() + "' for updates...");
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try {
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while (!closed) {
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WatchKey key = this.watchService.take();
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for (WatchEvent<?> event : key.pollEvents()) {
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WatchEvent.Kind<?> kind = event.kind();
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if (kind == StandardWatchEventKinds.OVERFLOW) continue;
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Object fileObject = event.context();
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if (!(fileObject instanceof Path)) continue;
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Path file = (Path) fileObject;
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String regionFileName = file.toFile().getName();
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updateRegion(regionFileName);
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}
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if (!key.reset()) return;
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}
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} catch (ClosedWatchServiceException ignore) {
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} catch (InterruptedException iex) {
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Thread.currentThread().interrupt();
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} finally {
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Logger.global.logDebug("Stopped watching map '" + map.getId() + "' for updates.");
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if (!closed) {
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Logger.global.logWarning("Region-file watch-service for map '" + map.getId() +
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"' stopped unexpectedly! (This map might not update automatically from now on)");
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}
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}
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}
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private synchronized void updateRegion(String regionFileName) {
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if (!regionFileName.endsWith(".mca")) return;
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if (!regionFileName.startsWith("r.")) return;
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try {
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String[] filenameParts = regionFileName.split("\\.");
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if (filenameParts.length < 3) return;
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int rX = Integer.parseInt(filenameParts[1]);
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int rZ = Integer.parseInt(filenameParts[2]);
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Vector2i regionPos = new Vector2i(rX, rZ);
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// we only want to start the render when there were no changes on a file for 5 seconds
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TimerTask task = scheduledUpdates.remove(regionPos);
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if (task != null) task.cancel();
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task = new TimerTask() {
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@Override
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public void run() {
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synchronized (RegionFileWatchService.this) {
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WorldRegionRenderTask task = new WorldRegionRenderTask(map, regionPos);
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scheduledUpdates.remove(regionPos);
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renderManager.scheduleRenderTask(task);
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Logger.global.logDebug("Scheduled update for region-file: " + regionPos + " (Map: " + map.getId() + ")");
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}
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}
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};
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scheduledUpdates.put(regionPos, task);
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delayTimer.schedule(task, 5000);
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} catch (NumberFormatException ignore) {}
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}
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public void close() {
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this.closed = true;
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this.interrupt();
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if (this.delayTimer != null) this.delayTimer.cancel();
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try {
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this.watchService.close();
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} catch (IOException ex) {
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Logger.global.logError("Exception while trying to close WatchService!", ex);
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}
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}
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}
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