Java Code Examples for org.apache.giraph.graph.Vertex#initialize()

@Override
public Vertex<LongWritable, DoubleWritable, FloatWritable>
getCurrentVertex() throws IOException {
    Vertex<LongWritable, DoubleWritable, FloatWritable> vertex =
            getConf().createVertex();
    LongWritable vertexId = new LongWritable(
            (inputSplit.getSplitIndex() * totalRecords) + recordsRead);
    DoubleWritable vertexValue = new DoubleWritable(vertexId.get() * 10d);
    long targetVertexId =
            (vertexId.get() + 1) %
                    (inputSplit.getNumSplits() * totalRecords);
    float edgeValue = vertexId.get() * 100f;
    List<Edge<LongWritable, FloatWritable>> edges = Lists.newLinkedList();
    edges.add(EdgeFactory.create(new LongWritable(targetVertexId),
            new FloatWritable(edgeValue)));
    vertex.initialize(vertexId, vertexValue, edges);
    ++recordsRead;
    if (LOG.isInfoEnabled()) {
        LOG.info("next: Return vertexId=" + vertex.getId().get() +
                ", vertexValue=" + vertex.getValue() +
                ", targetVertexId=" + targetVertexId + ", edgeValue=" + edgeValue);
    }
    return vertex;
}
 

@Override
public Vertex<LongWritable, Text, LongWritable> getCurrentVertex()
        throws IOException, InterruptedException {
    Text line = getRecordReader().getCurrentValue();
    String[] majorParts = line.toString().split("\\|");
    LongWritable id = new LongWritable(Long.parseLong(majorParts[0]));
    Text value = new Text(majorParts[1]);

    ArrayList<Edge<LongWritable, LongWritable>> edgeIdList = new ArrayList<Edge<LongWritable, LongWritable>>();

    if (majorParts.length > 2) {
        String[] edgeIds = majorParts[2].split(",");
        for (String edgeId:  edgeIds) {
            DefaultEdge<LongWritable, LongWritable> edge = new DefaultEdge<LongWritable, LongWritable>();
            LongWritable longEdgeId = new LongWritable(Long.parseLong(edgeId));
            edge.setTargetVertexId(longEdgeId);
            edge.setValue(longEdgeId); // dummy value
            edgeIdList.add(edge);
        }
    }

    Vertex<LongWritable, Text, LongWritable> vertex = getConf().createVertex();

    vertex.initialize(id, value, edgeIdList);
    return vertex;
}
 

@Override
public Vertex<Text, RyaTypeWritable, RyaStatementWritable> getCurrentVertex() throws IOException, InterruptedException {
    RyaStatementWritable currentStatement = reader.getCurrentValue();
    RyaStatement ryaStatement = currentStatement.getRyaStatement();
    RyaTypeWritable vertexWritable = new RyaTypeWritable();
    vertexWritable.setRyaType(ryaStatement.getSubject());
   Text vertexId = new Text(ryaStatement.getSubject().getData()); 
   Vertex<Text, RyaTypeWritable, RyaStatementWritable> vertex = classesConfiguration.createVertex();
   Edge<Text, RyaStatementWritable> edge = EdgeFactory.create(new Text(ryaStatement.toString()),
           currentStatement);
   List<Edge<Text, RyaStatementWritable>> edges = new ArrayList<Edge<Text, RyaStatementWritable>>();
   edges.add(edge);
    vertex.initialize(vertexId, vertexWritable, edges);
    return vertex;
}
 

@Override
public Vertex<IntWritable, NullWritable, NullWritable> getCurrentVertex() throws IOException, InterruptedException {
    Vertex<IntWritable, NullWritable, NullWritable> vertex =
            getConf().createVertex();
    IntWritable id = new IntWritable(inputSplit.getSplitIndex());

    List<Edge<IntWritable, NullWritable>> edges = Collections.emptyList();
    vertex.initialize(id, NullWritable.get(), edges);

    generated = true;
    return vertex;
}