/*
* This file is part of NucleusFramework for Bukkit, licensed under the MIT License (MIT).
*
* Copyright (c) JCThePants (www.jcwhatever.com)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.jcwhatever.nucleus.regions.file.basic;
import com.jcwhatever.nucleus.regions.IRegion;
import com.jcwhatever.nucleus.regions.file.IRegionFileData;
import com.jcwhatever.nucleus.regions.file.IRegionFileFactory;
import com.jcwhatever.nucleus.regions.file.IRegionFileLoader;
import com.jcwhatever.nucleus.utils.MetaKey;
import com.jcwhatever.nucleus.utils.PreCon;
import com.jcwhatever.nucleus.utils.coords.IChunkCoords;
import com.jcwhatever.nucleus.utils.observer.future.FutureAgent;
import com.jcwhatever.nucleus.utils.observer.future.FutureSubscriber;
import com.jcwhatever.nucleus.utils.observer.future.IFuture;
import com.jcwhatever.nucleus.utils.observer.future.IFuture.FutureStatus;
import com.jcwhatever.nucleus.utils.performance.queued.QueueProject;
import com.jcwhatever.nucleus.utils.performance.queued.QueueWorker;
import javax.annotation.Nullable;
import java.io.File;
import java.io.IOException;
import java.util.Collection;
/**
* Basic region format file loader.
*/
public class RegionFileLoader extends AbstractRegionFileAccess implements IRegionFileLoader {
public static final MetaKey<Boolean> META_IS_READING= new MetaKey<Boolean>(Boolean.class);
/**
* Constructor.
*
* @param region The region the loader is for.
* @param filenameFactory The filename factory used to get the filename and path of the regions files.
*/
public RegionFileLoader(IRegion region, IRegionFileFactory filenameFactory) {
super(region, filenameFactory);
}
@Override
public boolean canRead() {
IRegion region = getRegion();
Collection<IChunkCoords> chunks = region.getChunkCoords();
for (IChunkCoords chunk : chunks) {
File file;
try {
file = getChunkFile(region, chunk.getX(), chunk.getZ(), false);
} catch (IOException e) {
return false;
}
if (file == null || !file.exists())
return false;
}
return true;
}
@Override
public IFuture load(LoadType loadType, final LoadSpeed speed, IRegionFileData data) throws IOException {
PreCon.notNull(loadType);
PreCon.notNull(data);
final IRegion region = getRegion();
Collection<IChunkCoords> chunks = region.getChunkCoords();
final QueueProject restoreProject = new QueueProject(region.getPlugin());
if (chunks.size() == 0)
return restoreProject.cancel("No chunks to read.");
Boolean isReading = region.getMeta().get(META_IS_READING);
if (isReading != null && isReading)
return restoreProject.cancel("Region is still being read.");
if (!canRead())
return restoreProject.cancel("Region files not found.");
region.getMeta().setKey(META_IS_READING, true);
for (IChunkCoords chunk : chunks) {
QueueProject chunkProject = new QueueProject(region.getPlugin());
RegionChunkFileLoader loader = new RegionChunkFileLoader(region, chunk);
// add load task to chunk project
loader.loadInProject(
getChunkFile(region, chunk.getX(), chunk.getZ(), false),
chunkProject, loadType, data);
restoreProject.addTask(chunkProject);
}
final FutureAgent agent = new FutureAgent();
runProject(restoreProject, speed);
restoreProject.getResult().onStatus(new FutureSubscriber() {
@Override
public void on(FutureStatus status, @Nullable CharSequence message) {
switch (status) {
case ERROR:
agent.error(message);
break;
case CANCEL:
agent.cancel(message);
break;
case SUCCESS:
if (restoreProject.getTasks().isEmpty()) {
agent.success(message);
} else {
runProject(restoreProject, speed);
}
break;
}
}
});
return agent.getFuture().onStatus(new FutureSubscriber() {
@Override
public void on(FutureStatus status, @Nullable CharSequence message) {
region.getMeta().setKey(META_IS_READING, null);
}
});
}
private void runProject(QueueProject project, LoadSpeed speed) {
switch (speed) {
case PERFORMANCE:
QueueWorker.get().addTask(project);
break;
case BALANCED:
project.run();
break;
case FAST:
project.runFast();
break;
}
}
}