Java Uninterruptibles.getUninterruptibly方法代碼示例

import com.google.common.util.concurrent.Uninterruptibles; //導入方法依賴的package包/類
/**
 * Refreshes the value associated with {@code key}, unless another thread is already doing so.
 * Returns the newly refreshed value associated with {@code key} if it was refreshed inline, or
 * {@code null} if another thread is performing the refresh or if an error occurs during
 * refresh.
 */
@Nullable
V refresh(K key, int hash, CacheLoader<? super K, V> loader, boolean checkTime) {
  final LoadingValueReference<K, V> loadingValueReference =
      insertLoadingValueReference(key, hash, checkTime);
  if (loadingValueReference == null) {
    return null;
  }

  ListenableFuture<V> result = loadAsync(key, hash, loadingValueReference, loader);
  if (result.isDone()) {
    try {
      return Uninterruptibles.getUninterruptibly(result);
    } catch (Throwable t) {
      // don't let refresh exceptions propagate; error was already logged
    }
  }
  return null;
}
 

import com.google.common.util.concurrent.Uninterruptibles; //導入方法依賴的package包/類
/**
 * Get the result of the given {@link Future}, retrying if interrupted using
 * {@link Uninterruptibles#getUninterruptibly}, and wrap any checked exceptions
 * other than the one given using {@link Throwables#propagate(Throwable)}.
 *
 * Use this when you only need to handle a particular checked exception,
 * and want any others can be handled generically.
 */
public static <T, E extends Throwable> T getUncheckedExcept(Future<T> future, Class<E> except) throws E {
    try {
        return Uninterruptibles.getUninterruptibly(future);
    } catch(ExecutionException e) {
        if(except.isInstance(e.getCause())) {
            throw except.cast(e.getCause());
        } else {
            throw Throwables.propagate(e);
        }
    }
}
 

import com.google.common.util.concurrent.Uninterruptibles; //導入方法依賴的package包/類
public static <T> T get(Future<T> future) {
    try {
        return Uninterruptibles.getUninterruptibly(future);
    } catch (ExecutionException e) {
        throw propagateCause(e);
    }
}