1/*2 * Licensed to the Apache Software Foundation (ASF) under one3 * or more contributor license agreements. See the NOTICE file4 * distributed with this work for additional information5 * regarding copyright ownership. The ASF licenses this file6 * to you under the Apache License, Version 2.0 (the7 * "License"); you may not use this file except in compliance8 * with the License. You may obtain a copy of the License at9 *10 * http://www.apache.org/licenses/LICENSE-2.011 *12 * Unless required by applicable law or agreed to in writing, software13 * distributed under the License is distributed on an "AS IS" BASIS,14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.15 * See the License for the specific language governing permissions and16 * limitations under the License.17 */1819package org.apache.giraph.io.superstep_output;
2021import org.apache.giraph.graph.Vertex;
22import org.apache.giraph.io.SimpleVertexWriter;
23import org.apache.hadoop.io.Writable;
24import org.apache.hadoop.io.WritableComparable;
2526import java.io.IOException;
2728/**29 * Class to use as {@link SuperstepOutput} when we don't have output during30 * computation. All the methods are no-ops.31 *32 * @param <I> Vertex id33 * @param <V> Vertex value34 * @param <E> Edge value35 */36publicclass NoOpSuperstepOutput<I extends WritableComparable,
37 V extends Writable, E extends Writable> implements38 SuperstepOutput<I, V, E> {
39 @Override
40public SimpleVertexWriter<I, V, E> getVertexWriter() {
41returnnew SimpleVertexWriter<I, V, E>() {
42 @Override
43publicvoid writeVertex(Vertex<I, V, E> vertex) throws IOException,
44 InterruptedException {
45 }
46 };
47 }
4849 @Override
50publicvoid returnVertexWriter(
51 SimpleVertexWriter<I, V, E> vertexWriter) {
52 }
5354 @Override
55publicvoid postApplication() {
56 }
57 }