/**
* Licensed to jclouds, Inc. (jclouds) under one or more
* contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. jclouds licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.jclouds;
import com.google.common.annotations.Beta;
import com.google.common.util.concurrent.FutureFallback;
/**
* Provides a backup value to replace an earlier exception.
*
* @param <V>
* the result type of the backup value
*
* @author Adrian Cole
* @see FutureFallback
* @since 1.6
*/
@Beta
public interface Fallback<V> extends FutureFallback<V> {
/**
* The exception is provided so that the {@code Fallback} implementation can
* conditionally determine whether to propagate the exception or to attempt
* to recover.
*
* @param t
* the exception that made the call fail.
*/
V createOrPropagate(Throwable t) throws Exception;
}