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Add lockfile to prevent duplicate instances #115

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Add lockfile to prevent duplicate instances #115

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14 changes: 14 additions & 0 deletions src/main/java/net/marvk/fs/vatsim/map/Application.java
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Original file line number Diff line number Diff line change
Expand Up @@ -5,9 +5,13 @@
import net.harawata.appdirs.AppDirsFactory;
import net.marvk.fs.vatsim.map.data.VersionProvider;

import java.io.File;
import java.io.IOException;
import java.nio.channels.FileChannel;
import java.nio.channels.FileLock;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardOpenOption;

/**
* TODO Hacky way to start a JavaFX application without messing with modules
Expand All @@ -18,6 +22,16 @@ private Application() {
}

public static void main(final String[] args) throws IOException {
// Establish and check lockfile to prevent multiple instances
String userHome = System.getProperty("user.home");
File file = new File(userHome, "vatprism.lock");
FileChannel fc = FileChannel.open(file.toPath(), StandardOpenOption.CREATE, StandardOpenOption.WRITE);
FileLock lock = fc.tryLock();
if (lock == null) {
System.out.println("Another instance of VATprism is running");
System.exit(1);
}

reconfigureLogger();
SystemInformationLogger.logGeneralInformation();
App.main(args);
Expand Down