1   package ch.qos.logback.core.util;
2   
3   public interface InvocationGate {
4   
5       final long TIME_UNAVAILABLE = -1;
6   
7       /**
8        * The caller of this method can decide to skip further work if the returned
9        * value is true.
10       * 
11       * Implementations should be able to give a reasonable answer even if current
12       * time date is unavailable.
13       * 
14       * @param currentTime can be TIME_UNAVAILABLE (-1) to signal that time is not
15       *                    available
16       * @return if true, caller should skip further work
17       */
18      public abstract boolean isTooSoon(long currentTime);
19  
20  }