Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF 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; }