opendaylight/sal/yang-prototype/sal/sal-common-util/src/main/java/org/opendaylight/controller/sal/common/util/Futures.java

   1 package org.opendaylight.controller.sal.common.util;
   2
   3 import java.util.concurrent.ExecutionException;
   4 import java.util.concurrent.Future;
   5 import java.util.concurrent.TimeUnit;
   6 import java.util.concurrent.TimeoutException;
   7
   8 public class Futures {
   9
  10         private Futures(){}
  11
  12         public static <T> Future<T> immediateFuture(T result) {
  13                 return new ImmediateFuture<T>(result);
  14         }
  15
  16         private static class ImmediateFuture<T> implements Future<T> {
  17
  18                 private final T result;
  19
  20                 public ImmediateFuture(T result) {
  21                         this.result = result;
  22                 }
  23
  24                 @Override
  25                 public boolean cancel(boolean mayInterruptIfRunning) {
  26                         return false;
  27                 }
  28
  29                 @Override
  30                 public boolean isCancelled() {
  31                         return false;
  32                 }
  33
  34                 @Override
  35                 public boolean isDone() {
  36                         return true;
  37                 }
  38
  39                 @Override
  40                 public T get() throws InterruptedException, ExecutionException {
  41                         return result;
  42                 }
  43
  44                 @Override
  45                 public T get(long timeout, TimeUnit unit) throws InterruptedException,
  46                                 ExecutionException, TimeoutException {
  47                         return result;
  48                 }
  49
  50         }
  51 }