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package com.keuin.kbackupfabric.operation;
import com.keuin.kbackupfabric.operation.abstracts.InvokableBlockingOperation;
import com.keuin.kbackupfabric.util.PrintUtil;
import com.keuin.kbackupfabric.util.ZipUtil;
import com.keuin.kbackupfabric.exception.ZipUtilException;
import com.mojang.brigadier.context.CommandContext;
import net.minecraft.server.MinecraftServer;
import net.minecraft.server.command.ServerCommandSource;
import java.io.File;
import java.io.IOException;
import static com.keuin.kbackupfabric.util.BackupFilesystemUtil.getBackupFileName;
import static com.keuin.kbackupfabric.util.BackupFilesystemUtil.getBackupSaveDirectory;
import static org.apache.commons.io.FileUtils.forceDelete;
public class RestoreOperation extends InvokableBlockingOperation {
//private static final Logger LOGGER = LogManager.getLogger();
private final String backupName;
private final Thread serverThread;
private final String backupFilePath;
private final String levelDirectory;
private final CommandContext<ServerCommandSource> context;
private final MinecraftServer server;
public RestoreOperation(CommandContext<ServerCommandSource> context, String backupFilePath, String levelDirectory, String backupName) {
server = context.getSource().getMinecraftServer();
this.backupName = backupName;
this.serverThread = server.getThread();
this.backupFilePath = backupFilePath;
this.levelDirectory = levelDirectory;
this.context = context;
}
@Override
protected boolean blockingContext() {
// do restore to backupName
PrintUtil.broadcast(String.format("Restoring to previous world %s ...", backupName));
String backupFileName = getBackupFileName(backupName);
PrintUtil.debug("Backup file name: " + backupFileName);
File backupFile = new File(getBackupSaveDirectory(server), backupFileName);
PrintUtil.msgInfo(context, "Server will shutdown in a few seconds, depending on world size and disk speed, the progress may take from seconds to minutes.", true);
PrintUtil.msgInfo(context, "Please do not force the server stop, or the level would be broken.", true);
PrintUtil.msgInfo(context, "After it shuts down, please restart the server manually.", true);
final int WAIT_SECONDS = 10;
for (int i = 0; i < WAIT_SECONDS; ++i) {
try {
Thread.sleep(1000);
} catch (InterruptedException ignored) {
}
}
PrintUtil.broadcast("Shutting down ...");
//RestoreWorker worker = new RestoreWorker(server.getThread(), backupFilePath, levelDirectory);
Thread workerThread = new Thread(new WorkerThread(), "RestoreWorker");
workerThread.start();
try {
Thread.sleep(500);
} catch (InterruptedException ignored) {
}
server.stop(false);
return true;
}
@Override
public String toString() {
return String.format("restoration from %s", backupName);
}
private class WorkerThread implements Runnable {
@Override
public void run() {
try {
// Wait server thread die
PrintUtil.info("Waiting for the server thread to exit ...");
while (serverThread.isAlive()) {
try {
serverThread.join();
} catch (InterruptedException ignored) {
}
}
PrintUtil.info("Wait for 5 seconds ...");
try {
Thread.sleep(5000);
} catch (InterruptedException ignored) {
}
// Delete old level
PrintUtil.info("Server stopped. Deleting old level ...");
File levelDirFile = new File(levelDirectory);
long startTime = System.currentTimeMillis();
int failedCounter = 0;
final int MAX_RETRY_TIMES = 20;
while (failedCounter < MAX_RETRY_TIMES) {
System.gc();
if (!levelDirFile.delete() && levelDirFile.exists()) {
System.gc();
forceDelete(levelDirFile); // Try to force delete.
}
if (!levelDirFile.exists())
break;
++failedCounter;
try {
Thread.sleep(500);
} catch (InterruptedException ignored) {
}
}
if (levelDirFile.exists()) {
PrintUtil.error(String.format("Cannot restore: failed to delete old level %s .", levelDirFile.getName()));
return;
}
// Decompress archive
PrintUtil.info("Decompressing archived level ...");
ZipUtil.unzip(backupFilePath, levelDirectory, false);
long endTime = System.currentTimeMillis();
PrintUtil.info(String.format("Restore complete! (%.2fs) Please restart the server manually.", (endTime - startTime) / 1000.0));
} catch (SecurityException | IOException | ZipUtilException e) {
PrintUtil.error("An exception occurred while restoring: " + e.getMessage());
}
}
}
}
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