simpleserver.thread.AutoFreeSpaceChecker.java Source code

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Here is the source code for simpleserver.thread.AutoFreeSpaceChecker.java

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/*
 * Copyright (c) 2010 SimpleServer authors (see 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 SOFTWARE.
 */
package simpleserver.thread;

import static simpleserver.util.Util.*;

import java.io.File;
import java.io.IOException;
import java.util.Timer;
import java.util.TimerTask;

import org.apache.commons.io.FileSystemUtils;
import org.apache.commons.io.FileUtils;

import simpleserver.Server;

public class AutoFreeSpaceChecker {
    private static final int period = 5 * 60 * 1000;

    private final Timer timer;
    private final Server server;

    public AutoFreeSpaceChecker(Server server) {
        check(false);

        timer = new Timer();
        timer.schedule(new Checker(), 0, period);

        this.server = server;
    }

    // TODO maybe adapt to current files considered for backup or only check space
    // of map
    public void check(boolean beforeBackup) {
        try {
            long neededSizeKb = 0;
            if (beforeBackup) {
                neededSizeKb += Math.round(FileUtils.sizeOfDirectory(server.getWorldDirectory()) / 1024) * 2;
            } else {
                neededSizeKb = 50 * 1024;
            }

            long freeSpaceKb = FileSystemUtils.freeSpaceKb();
            if (freeSpaceKb < neededSizeKb) {
                println("Warning: You have only " + Math.round(freeSpaceKb / 1024)
                        + " MB free space in this drive!");
                println("Trying to delete old backups...");

                int filesDeleted = 0;
                while (FileSystemUtils.freeSpaceKb() < neededSizeKb) {
                    File firstCreatedFile = AutoBackup.oldestBackup();

                    if (firstCreatedFile != null) {
                        println("Deleting: " + firstCreatedFile.getPath());
                        firstCreatedFile.delete();
                        filesDeleted++;
                    } else {
                        println("No backups found...");
                        return;
                    }
                }

                if (filesDeleted > 1) {
                    println("Deleted " + filesDeleted + " backup archives.");
                } else {
                    println("Deleted 1 backup archive.");
                }
            }
        } catch (IOException e) {
            println(e);
            println("Free Space Checker Failed!");
        } catch (IllegalArgumentException e) {
            println(e);
            println("Backup space calculation failed because of a was file deleted during action. Trying again later.");

        }
    }

    public void cleanup() {
        timer.cancel();
    }

    private final class Checker extends TimerTask {
        private Checker() {
            super();
        }

        @Override
        public void run() {
            check(false);
        }
    }
}