| /* |
| * 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.giraph.examples; |
| |
| import java.util.Iterator; |
| |
| import org.apache.hadoop.io.FloatWritable; |
| import org.apache.hadoop.io.IntWritable; |
| import org.apache.hadoop.io.LongWritable; |
| |
| import org.apache.giraph.graph.EdgeListVertex; |
| |
| /** |
| * Test whether messages can be sent and received by vertices. |
| */ |
| public class SimpleMsgVertex extends |
| EdgeListVertex<LongWritable, IntWritable, FloatWritable, IntWritable> { |
| @Override |
| public void compute(Iterator<IntWritable> msgIterator) { |
| if (getVertexId().equals(new LongWritable(2))) { |
| sendMsg(new LongWritable(1), new IntWritable(101)); |
| sendMsg(new LongWritable(1), new IntWritable(102)); |
| sendMsg(new LongWritable(1), new IntWritable(103)); |
| } |
| if (!getVertexId().equals(new LongWritable(1))) { |
| voteToHalt(); |
| } |
| else { |
| /* Check the messages */ |
| int sum = 0; |
| while (msgIterator != null && msgIterator.hasNext()) { |
| sum += msgIterator.next().get(); |
| } |
| System.out.println("TestMsgVertex: Received a sum of " + sum + |
| " (will stop on 306)"); |
| |
| if (sum == 306) { |
| voteToHalt(); |
| } |
| } |
| if (getSuperstep() > 3) { |
| System.err.println("TestMsgVertex: Vertex 1 failed to receive " + |
| "messages in time"); |
| voteToHalt(); |
| } |
| } |
| } |