| /** |
| * 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.apache.hama.graph; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.io.Writable; |
| import org.apache.hadoop.io.WritableComparable; |
| import org.apache.hama.bsp.BSPPeer; |
| |
| /** |
| * The VertexOutputWriter defines what parts of the vertex shall be written to |
| * the output format. |
| * |
| * @param <V> the vertexID type. |
| * @param <E> the edge value type. |
| * @param <M> the vertex value type. |
| */ |
| @SuppressWarnings("rawtypes") |
| public class DefaultVertexOutputWriter<V extends WritableComparable, E extends Writable, M extends Writable> |
| implements VertexOutputWriter<V, M, V, E, M> { |
| |
| @Override |
| public void setup(Configuration conf) { |
| // do nothing |
| } |
| |
| @Override |
| public void write(Vertex<V, E, M> vertex, |
| BSPPeer<Writable, Writable, V, M, GraphJobMessage> peer) |
| throws IOException { |
| assert vertex.getVertexID() != null : "vertex id cannot be null"; |
| assert vertex.getValue() != null : "vertex value cannot be null"; |
| peer.write(vertex.getVertexID(), vertex.getValue()); |
| } |
| |
| } |