use ChronoUnit instead of TimeUnit

src/main/java/net/horizoncode/sysbackup/tasks/TaskBuilder.java

@@ -11,6 +11,7 @@ import org.tomlj.TomlArray;
 
 import java.io.File;
 import java.text.SimpleDateFormat;
+import java.time.temporal.ChronoUnit;
 import java.util.Date;
 import java.util.concurrent.LinkedBlockingQueue;
 import java.util.concurrent.TimeUnit;
@@ -63,8 +64,10 @@ public class TaskBuilder {
     File outputFile = new File(backupDir, fileName);
 
     if (doVAC) {
-      TimeUnit unit =
-          TimeUnit.valueOf(getTaskConfig().getStringOrDefault("vacuum.unit", TimeUnit.DAYS.name()));
+      ChronoUnit unit =
+          ChronoUnit.valueOf(
+              getTaskConfig().getStringOrDefault("vacuum.unit", ChronoUnit.DAYS.name()));
+
       int value = getTaskConfig().getIntOrDefault("vacuum.time", 5);
 
       System.out.printf("Adding VacuumTask with lifetime of %d %s%n", value, unit.name());

src/main/java/net/horizoncode/sysbackup/tasks/impl/VacuumTask.java

@@ -4,18 +4,19 @@ import lombok.Getter;
 import net.horizoncode.sysbackup.tasks.Task;
 
 import java.io.File;
+import java.time.Duration;
+import java.time.temporal.ChronoUnit;
 import java.util.Arrays;
 import java.util.Objects;
-import java.util.concurrent.TimeUnit;
 
 @Getter
 public class VacuumTask extends Task {
 
   private final File backupDir;
-  private final TimeUnit unit;
+  private final ChronoUnit unit;
   private final int value;
 
-  public VacuumTask(File backupDir, TimeUnit unit, int value) {
+  public VacuumTask(File backupDir, ChronoUnit unit, int value) {
     this.backupDir = backupDir;
     this.unit = unit;
     this.value = value;
@@ -25,7 +26,10 @@ public class VacuumTask extends Task {
   public void start() {
     if (backupDir.listFiles() != null) {
       Arrays.stream(Objects.requireNonNull(backupDir.listFiles()))
-          .filter(file -> file.lastModified() + unit.toMillis(value) <= System.currentTimeMillis())
+          .filter(
+              file ->
+                  file.lastModified() + Duration.of(value, unit).toMillis()
+                      <= System.currentTimeMillis())
           .forEachOrdered(File::deleteOnExit);
     }
 

src/main/resources/exampletask.toml

@@ -5,7 +5,7 @@ outputFile = "{date} - {taskName}"
 [vacuum]
 enabled = true
 time = 5
-unit = "DAYS" # See java.util.concurrent.TimeUnit
+unit = "DAYS" # See java.time.temporal.ChronoUnit
 
 [mysql]
 enabled = true