001/** 002 * Copyright 2015 DuraSpace, Inc. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package org.fcrepo.kernel.utils.iterators; 017 018import com.google.common.util.concurrent.ListenableFuture; 019 020/** 021 * Implemented by something that can consume an {@link java.util.Iterator}. The 022 * assumption is that a reference to the appropriate iterator is managed as part 023 * of the state of any implementation. 024 * 025 * @author ajs6f 026 * @since Oct 24, 2013 027 * @param <E> 028 * @param <T> 029 */ 030public interface IteratorConsumer<E, T> { 031 032 /** 033 * Synchronous consumption. 034 */ 035 void consume() throws Exception; 036 037 /** 038 * Asynchronous consumption. 039 * 040 * @return ListenableFuture 041 */ 042 ListenableFuture<T> consumeAsync(); 043 044}